GRB130606A

This page lists all entries on GRB130606A in GRBweb

Summary IPN Swift GCN 14781 GCN 14782 GCN 14783 GCN 14784 GCN 14785 GCN 14789 GCN 14790 GCN 14791 GCN 14792 GCN 14793 GCN 14794 GCN 14796 GCN 14797 GCN 14798 GCN 14799 GCN 14800 GCN 14802 GCN 14804 GCN 14806 GCN 14807 GCN 14808 GCN 14811 GCN 14812 GCN 14814 GCN 14815 GCN 14816 GCN 14817 GCN 14818 GCN 14819 GCN 14824 GCN 14826 GCN 14840 GCN 14864 GCN 15230

Summary table
Variable Value Source
T0 21:04:39 UTC GCN_circulars,Swift Det
ra 249.3964° Swift
decl 29.7963° Swift
pos_error 1.81e-04° Swift
T90 276.58 s Swift
T90_start 21:04:39 UTC Swift
fluence 2.90e-06 erg/cm² Swift
redshift 5.9100 GCN_circulars,Other
T100 276.58 s
GBM_located False
mjd 56449.878229166665 GCN_circulars,Swift Det
IPN table
GRB_name GRB130606A
ra 249.4042°
decl 29.7833°
pos_error 5.00e-02°
redshift 5.9130
Swift table
GRB_name GRB130606A
t_trigger 21:04:39 UTC
ra 249.3964°
decl 29.7963°
pos_error 1.81e-04°
T90 276.58 s
fluence 2.90e-06 erg/cm²
redshift 5.9100
GCN 14781 table
GRB_name GRB130606A
GCN_number 14781
Detection_method Swift Det
t_trigger 21:04:39 UTC
ra 249.4030°
decl 29.7910°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14781 SUBJECT: GRB 130606A: Swift detection of a burst DATE: 13/06/06 21:25:59 GMT FROM: David Palmer at LANL T. N. Ukwatta (MSU), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), H. A. Krimm (CRESST/GSFC/USRA), D. Malesani (DARK/NBI), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), D. M. Palmer (LANL) and M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift Team: At 21:04:39 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130606A (trigger=557589). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 249.403, +29.791 which is RA(J2000) = 16h 37m 37s Dec(J2000) = +29d 47' 27" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure. The initial peak is about 10 sec long from T-5 to T+5 sec. Then at T+150 sec, there is a second, brighter peak of about 20 sec duration. The peak count rate was ~2300 counts/sec (15-350 keV), at ~155 sec after the trigger. The XRT began observing the field at 21:05:51.4 UT, 72.4 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 249.39916, 29.79428 which is equivalent to: RA(J2000) = 16h 37m 35.80s Dec(J2000) = +29d 47' 39.4" with an uncertainty of 3.6 arcseconds (radius, 90% containment). This location is 16 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.98 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 3.3 (+1.76/-1.58) x 10^21 cm^-2 (90% confidence). The initial flux in the 2.5 s image was 1.64e-09 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 80 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag, but the trailed images will reduce the sensitivity slightly. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02. The UVOT data shows stars trailing by about 10 arcseconds, which may indicate pointing instability at this level. Therefore this uncertainty should be added to the nominal XRT location for follow-up searches. A refined aspect solution will be generated from the full downlinked data. Burst Advocate for this burst is T. N. Ukwatta (tilan.ukwatta AT gmail.com). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN 14782 table
GRB_name GRB130606A
GCN_number 14782
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14782 SUBJECT: GRB 130606A: optical afterglow with BOOTES-2/TELMA and 1.23m CAHA DATE: 13/06/06 22:10:41 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia M. Jelinek (IAA-CSIC), J. Gorosabel (UPV-EY, IAA-CSIC), A. J. Castro-Tirado (IAA-CSIC), S. Mottola (DLR), S. Hellmich (DLR), R. Fernndez-Muoz (EELM-CSIC) and V. F. Muoz-Martnez (UMA), on behalf of a larger collaboration, report: "Following the detection of GRB 130606 by Swift (Ukwatta et al. GCNC 14781), follow-up observation were taken with the 0.6m TELMA telescope at the BOOTES-2 station (Mlaga) and with the 1.23m CAHA telescope at the German-Spanish Calar Alto Observatory, starting 21m postburst. At the edge of the Swift/XRT error box we identify an optical source not present in the DSS-2 with a magnitude of R about 18.5 which we identify as the optical afterglow." [GCN OPS NOTE(06jun13): Per author's request, the GRB name in the Title was corrected.]
GCN 14783 table
GRB_name GRB130606A
GCN_number 14783
Detection_method Other
ra 249.3966°
decl 29.7964°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14783 SUBJECT: GRB 130606A: NOT afterglow detection DATE: 13/06/06 22:29:03 GMT FROM: Dong Xu at DARK/NBI D. Xu (DARK/NBI), D. Malesani (DARK/NBI), S. Schulze (PUC and MCSS), N. R Tanvir (U. Leicester), D. J. Watson (DARK/NBI), J. Hjorth (DARK/NBI), J. Datson (Tuorla Observatory, U. Turku), R. Salinas (FINCA) report on behalf of a larger collaboration: We observed the field of GRB 130606A (Ukwatta et al., GCN 14781) using the 2.5m Nordic Optical Telescope (NOT) equipped with the MOSCA imager. Observations started at 21:35 UT on 2013-06-06 (i.e., 0.5 hr after the burst) and 2x300 s frames were obtained in the Sloan r-filter. Close to the refined XRT position, we detect an object not visible in the DSS and SDSS images of the field, at the following coordinates: RA (J2000) = 16:37:35.188 Dec(J2000) = +29:47:47.03 These coordinates are formally outside the XRT error circle, which is however affected by extra systematic uncertainties due to the problems in the satellite attitude (Ukwatta et al., GCN 14781). The object has m(r) = 20.8, calibrated against the SDSS. We suggest this object is the afterglow of GRB 130606A. It is probably the same object reported by Jelinek et al. (GCN 14782).
GCN 14784 table
GRB_name GRB130606A
GCN_number 14784
Detection_method Other
ra 249.3964°
decl 29.7962°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14784 SUBJECT: GRB 130606A: IRSF NIR Observation DATE: 13/06/06 22:51:42 GMT FROM: Daisuke Kuroda at OAO/NAOJ Takahiro Nagayama (Nagoya Univ) on behalf of OISTER collaboration. We observed the field of GRB 130606A (Ukwatta et al, GCN Circular 14781) with the Infrared Survey Facility 1.4m telescope and NIR camera SIRIUS at Sutherland Observatory in South Africa. The observation was started with the JHKs bands simultaneously from 2013-06-06 21:38 (UT). We have detected a bright source not detected in 2MASS ALL SKY survey at RA=16:37:35.14 DEC=+29:47:46.4 (J2000) from the first 300sec exposure image. Preliminary photometry results are as follows J=13.1 H=13.9 Ks=14.7 These magnitudes are in the Vega system and not corrected for Galactic extinction in the direction of the GRB.
GCN 14785 table
GRB_name GRB130606A
GCN_number 14785
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14785 SUBJECT: GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation DATE: 13/06/06 23:05:39 GMT FROM: Francisco Virgili at Liverpool John Moores U F.J. Virgili, C.G. Mundell (LJMU), A. Melandri (INAF-OAB), and A. Gomboc (U. Ljubljana) report: "The 2-m Liverpool Telescope robotically followed up GRB 130606A (SWIFT trigger 557589; Ukwatta et al., GCN 14781) 38.52 min after the GRB trigger time. We detect a fading source in i' and z' bands consistent with the position reported by Xu et al. (GCN 14783) with magnitudes Filter Magnitude t since trigger (min) i' 18.60 +/- 0.02 45.02 i' 18.67 +/- 0.02 55.48 i' 18.89 +/- 0.03 83.00 z' 16.65 +/- 0.02 47.74 z' 16.80 +/- 0.03 61.47 Magnitudes are calibrate against SDSS catalogued field stars. Observations and analysis are ongoing. [GCN OPS NOTE(10jun13): Per author's request, AG was added to the author list.]
GCN 14789 table
GRB_name GRB130606A
GCN_number 14789
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14789 SUBJECT: Virtual Telescope observations of GRB 130606A DATE: 13/06/06 23:45:11 GMT FROM: Gianluca Masi at Bellatrix Astronomical Obs G. Masi (Ceccano, Italy) and F. Nocentini (Frosinone, Italy) report: On June 6.96456 2013 UT, we imaged the field around GRB 130606A (Ukwatta et al. (GCN 14781) remotely using the the 0.43m-f/6.8 robotic unit part of the Virtual Telescope robotic facility in Italy, 124 minutes after the burst. 4, 300 seconds unfiltered CCD images were coadded and show an object at the following coordinates (J2000): R.A. = 16 37 35.13 Decl. +29 47 46.7 We also performed photometry, assuming R-mags from UCAC-4 for the stars in the field, getting an estimate for the magnitude of 19.6 (CR).
GCN 14790 table
GRB_name GRB130606A
GCN_number 14790
Detection_method Optical
redshift 6.1000
Circular_text TITLE: GCN CIRCULAR NUMBER: 14790 SUBJECT: GRB 130606A: 10.4m GTC spectroscopy indicates z = 6.1 DATE: 13/06/07 00:06:12 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia A. J. Castro-Tirado, R. Snchez-Ramrez, M. Jelinek (IAA-CSIC), J. Gorosabel (EHU-UPV), J. C. Tello, P. Ferrero, O. Lara-Gil, R. Cunniffe (IAA-CSIC), D. Prez-Ramrez (U. Jan), P. Kubanek (FZU), J. M. Castro Cern (ESAC), A. Fernndez-Soto (UV), S. Mottola (DLR), S. Hellmich (DLR), R. Fernndez-Muoz (EELM-CSIC), V. F. Muoz-Martnez (UMA), J. Cepa (IAC) and C. lvarez-Iglesias (GTC), on behalf of a larger collaboration, report: Following the detection of the optical afterglow (Jelinek et al. GCNC 14782, Xu et al. GCNC 14783) to GRB 130606A ((Ukwatta et al. GCNC 14781), we have obtained an optical spectrum with the 10.4 m GTC (+OSIRIS) starting aprox. 1.5 hr postburst, covering the 4000-10000 wavelength range. The continuum is detected only redwards of aprox. 6500 A, with multiple absorption lines which are indicative of the Lyman forest. Therefore we infer a (preliminary) redshift of z = 6.1 (to be refined). This is consistent with the dropout in the optical band (Virgili et al. GCNC 14785) and the bright nIR afterglow (Nagayama et al. GCNC 14784). Observations at all wavelengths are encouraged.
GCN 14791 table
GRB_name GRB130606A
GCN_number 14791
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14791 SUBJECT: GRB130606A: Montarrenti Observatory afterglow detection DATE: 13/06/07 00:14:01 GMT FROM: Simone Leonini at Monarrenti Obs Simone Leonini, G. Guerrini, P. Rosi and L.M. Tinjaca Ramirez (Montarrenti Observatory, Siena, Italy) report: We observed the field of GRB 130606A (Swift trigger 557589, Ukwatta et al., GCN 14781) with the automatic 0.53m RC telescope + U47 detector at Montarrenti Observatory (Siena, Italy, IAU code C88). The observations was started at 2013-06-06 22:57:50 UT (~117 minutes after the trigger) and we co-added 4 unfiltered CCD exposures of 60s each. We detect a new source of mag. R=18.9 +/-0.16 (USNO-B1 catalogue, not corrected for galactic dust extinction) at the following position: RA (J2000) 16h 37m 35.13s +/-0.19 Decl. (J2000) +29° 47' 46.9" +/-0.18 The message may be cited.
GCN 14792 table
GRB_name GRB130606A
GCN_number 14792
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14792 SUBJECT: GRB 130606A: Errata of J and Ks magnitudes in GCN 14784 DATE: 13/06/07 00:24:12 GMT FROM: Daisuke Kuroda at OAO/NAOJ Takahiro Nagayama (Nagoya Univ) on behalf of OISTER collaboration. In the circular 14784, submited by us, the J and Ks magnitudes are swapped by mistake. J=14.7 H=13.9 Ks=14.7 are correct.
GCN 14793 table
GRB_name GRB130606A
GCN_number 14793
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14793 SUBJECT: GRB 130606A: Errata of J and Ks magnitudes in GCN 14784 DATE: 13/06/07 00:25:50 GMT FROM: Daisuke Kuroda at OAO/NAOJ Takahiro Nagayama (Nagoya Univ) on behalf of OISTER collaboration. In the circular 14784, submited by us, the J and Ks magnitudes are swapped by mistake. J=14.7 H=13.9 Ks=13.1 are correct.
GCN 14794 table
GRB_name GRB130606A
GCN_number 14794
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14794 SUBJECT: GRB 130606A: Errata Ks magnutide in GCN 14792 DATE: 13/06/07 00:37:22 GMT FROM: Daisuke Kuroda at OAO/NAOJ Takahiro Nagayama (Nagoya Univ) on behalf of OISTER collaboration. In the circular 14792, submited by us, the Ks magnitude is correct. The circular 14793 are correct. We apologize for the possible inconvenience.
GCN 14796 table
GRB_name GRB130606A
GCN_number 14796
Detection_method Other
redshift 5.9100
Circular_text TITLE: GCN CIRCULAR NUMBER: 14796 SUBJECT: GRB 130606A: 10.4m GTC refined redshift z = 5.91 DATE: 13/06/07 01:59:16 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia A. J. Castro-Tirado, R. Snchez-Ramrez (IAA-CSIC), J. Gorosabel (EHU-UPV, IAA-CSIC), M. Jelinek, J. C. Tello, P. Ferrero, O. Lara-Gil, R. Cunniffe (IAA-CSIC), D. Prez-Ramrez (U. Jan), S. Guziy (Nikolaev Univ.), P. Kubanek (FZU), J. M. Castro Cern (ESAC), A. Fernndez-Soto (UV), S. Mottola (DLR), S. Hellmich (DLR), R. Fernndez-Muoz (EELM-CSIC), V. F. Muoz-Martnez (UMA), L. Sabau-Graziati (INTA), A. Martn-Carrillo (UCD), J. Cepa (IAC), A. Tejero and C. lvarez-Iglesias (GTC), on behalf of a larger collaboration, report: A detailed analysis of our 10.4m GTC spectrum reported on GCNC 14790 reveals several absorption metallic lines (N V, Si II and Si IV amongst others) at a common redshift of z = 5.91 which we propose to be the redshift of GRB 130606A. [GCN OPS NOTE(10jun13): Per author's request, SG was added to the author list.]
GCN 14797 table
GRB_name GRB130606A
GCN_number 14797
Detection_method Swift Other
ra 249.3839°
decl 29.8662°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14797 SUBJECT: GRB 130606A:T100 observations DATE: 13/06/07 05:13:14 GMT FROM: Eda Sonbas at NASA/GSFC E. Sonbas (Adiyaman Univ.), H. Avdan (Cukurova Univ.), T. Guver (Sabanci Univ.), M. Kaplan (Akdeniz Univ.), M. Kocak (TUG), E. Gogus (Sabanci Univ.), H. Kirbiyik (TUG) report on behalf of a larger collaboration We observed the field of Swift GRB 130606A (Ukwatta et al. GCN#14781) with the 1.0 meter T100 telescope (TUBITAK National Observatory, Antalya - Turkey), starting June, 6, 22:43:53 UT (~ 1.6 hours after the trigger). Observations were carried out in the R filter under moderate weather conditions. We detected a new source in 300 s R band image at a position that is consistent with Xu et al. GCN#14783 Using USNO-B1 star USNO-B1 1198-0251348 (RA= 16:37:32.14 , Dec= +29:51:58.15 ) in the field, the magnitude of the OT were estimated as 20.6 +/-0.2. Further observations using the same filter are ongoing. We are grateful to the TUBITAK National Observatory staff for promptly scheduling the observations and their technical support.
GCN 14798 table
GRB_name GRB130606A
GCN_number 14798
Detection_method Swift-BAT Det
redshift 5.9065
Circular_text TITLE: GCN CIRCULAR NUMBER: 14798 SUBJECT: GRB 130606A: MMT Spectroscopy DATE: 13/06/07 05:16:26 GMT FROM: Ryan Chornock at Harvard R. Lunnan, M. Drout, R. Chornock, and E. Berger (Harvard) report: We observed the optical afterglow (Jelinek et al., GNC 14782; Xu et al., GCN 14783; Nagayama et al., GCN 14784; Virgili et al., 14785; Masi et al., GCN 14789; Leonini et al., GCN 14791; Sonbas et al., GCN 14797) of GRB 130606A (Ukwatta et al., GCN 14781) using the Blue Channel spectrograph on the 6.5-m MMT starting at 04:04 UT on 7 June (7.0 hours after the BAT trigger). We obtained 4x1200s of spectroscopy spanning the wavelength range 7450-9350 Angs with a resolution of 2.1 Angstroms. We detect a sharp cutoff in flux blueward of ~8425 Angs, consistent with Lyman-alpha at a redshift of z=5.9, with very little transmission between 7850 and 8400 Angs, although some flux is present blueward of that. Several metal absorption lines are present to the red, including NV, Si II, C II, and O I at redshift z=5.913, confirming the GTC redshift of Castro-Tirado et al. (GCN 14790, GCN 14796).
GCN 14799 table
GRB_name GRB130606A
GCN_number 14799
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 14799 SUBJECT: GRB 130606A: RATIR r'-band Dropout DATE: 13/06/07 05:46:43 GMT FROM: Nat Butler at Az State U Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB) J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UCSC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos A. de Diego (UNAM), Leonid Georgiev (UNAM), Jess Gonzlez (UNAM), Carlos Romn-Ziga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We observed the field of GRB 130606A (Ukwatta, et al., GCN 14781) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronmico Nacional on Sierra San Pedro Mrtir from 2013/06 7.19 to 2013/06 7.20 UTC (7.38 to 7.79 hours after the BAT trigger), obtaining a total of 0.36 hours exposure in the r' and i' bands and 0.15 hours exposure in the Z, Y, J, and H bands. The optical/NIR afterglow (Jelinek, et al., GCN 14782; Xu et al., GCN 14783) is quite red and clearly detected in all bands but r'. In comparison with SDSS DR9 and 2MASS, we obtain the following detections and 3-sigma upper limit: r' > 23.02 i' 21.16 +/- 0.06 Z 18.79 +/- 0.03 Y 18.40 +/- 0.03 J 18.32 +/- 0.03 H 17.92 +/- 0.03 These magnitudes are in the AB system and not corrected for Galactic extinction in the direction of the GRB. The lack of detection in r' and relatively faint flux level in i' are consistent with the high-redshift determined from spectroscopy (Castro-Tirado, et al., GCN 14790, 14796; Lunnan, et al., GCN 14798). We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir. Further observations are planned.
GCN 14800 table
GRB_name GRB130606A
GCN_number 14800
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14800 SUBJECT: GRB 130606A: LOAO IZY Observation DATE: 13/06/07 08:34:27 GMT FROM: Myungshin Im at Seoul Nat U M. Im (CEOU/SNU), H.-I. Sung(KASI), and Y. Urata (NCU) on behalf of EAFON We observed the afterglow of GRB 130606A (Ukwatta et al. GCN 14781), using a 1-m telescope at Mt. Lemmon Optical Observatory (LOAO) in Arizona, US. The observation started at 2013-06-07 03:50:26 UT, about 6.75 hrs after the burst alert, and a series of images were taken in I, Z, and Y-bands for about 1 hr. We identify the afterglow, in all the three bands, with approximate magnitudes of I = 20.8 +- 0.1, Z=18.70 +- 0.11, and Y=18.49 +- 0.29, all in AB magnitude, calibrated against a star in vicinity using SDSS and 2MASS photometry. This confirms earlier reports of the afterglow detection and its sharp drop in SED between I-band and Z-band that is expected at z=5.91 (Jelinek et al. GNC 14782; Xu et al.GCN 14783; Nagayama et al. GCN 14784; Virgili et al. 14785; Masi et al. GCN 14789; Leonini et al. GCN 14791; Sonbas et al., GCN 14797; Lunnan et al. GCN 14798; Castro-Tirado et al. GCN 14790; Butler et al. GCN 14799). We thank the LOAO operator, Jae-Hyuk Yoon for performing the observation.
GCN 14802 table
GRB_name GRB130606A
GCN_number 14802
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 14802 SUBJECT: GRB 130606A: PAIRITEL NIR Afterglow Observations DATE: 13/06/07 09:49:51 GMT FROM: Adam Morgan at U.C. Berkeley A. N. Morgan (UC Berkeley) reports: We observed the field of GRB 130606A (Ukwatta, et al., GCN 14781) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at 2013-Jun-07 06h01m22s UT, ~8.9 hours after the Swift Trigger. In mosaics (effective exposure time of ~36.3 minutes) taken simultaneously in the J, H, and Ks filters, we detect the optical afterglow (e.g. Jelinek, et al., GCN 14782; Xu et al., GCN 14783; Nagayama et al., GCN 14784). The preliminary photometry yields: post burst t_mid (hr) exp.(m) filt mag m_err 9.44 36.3 J 17.83 0.06 9.44 36.3 H 17.06 0.07 9.44 36.3 Ks 16.4 0.1 Observations are ongoing. All magnitudes are given in the Vega system, calibrated to 2MASS. No correction for Galactic extinction has been made to the above reported values.
GCN 14804 table
GRB_name GRB130606A
GCN_number 14804
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14804 SUBJECT: GRB 130606A: P60 Observations DATE: 13/06/07 11:48:56 GMT FROM: Daniel Perley at Caltech D. A. Perley (Caltech) and S. B. Cenko (GSFC) report on behalf of a larger collaboration: We imaged the field of GRB 130606A (Ukwatta et al., GCN 14781) with the robotic Palomar 60-inch telescope throughout the night of 2013-06-07 UT, beginning at 04:01 UT and continuing until morning twilight at 11:39 UT. Initial observations consisted of a series of r, i, and z-band frames; later in the night we switched to exclusively z-band observations. Transparency and seeing conditions were good throughout. The GRB afterglow (Jelinek et al., GCN 14782; Xu et al., GCN 14783; Nagayama et al., GCN 14784) is well-detected in the z-band exposures and marginally detected in the other filters. Preliminary (not fringe-corrected) aperture photometry of a few select points yields: t_start(d) t_exp(s) filter magnitude 0.30679 180 z = 18.62 +/- 0.08 0.42224 180 z = 19.22 +/- 0.09 0.50888 180 z = 19.59 +/- 0.11 0.58040 180 z = 19.73 +/- 0.22 The afterglow decays as a power-law with an index of approximately alpha=1.6-1.7 over the course of the observations. Given the redshift (Castro-Tirado et al., GCN 14796; Lunnan et al., GCN 14798) these relatively bright fluxes indicate an extremely luminous afterglow, especially at early times; similar to the luminous high-redshift GRB 050904 (e.g. Kann, Masetti, & Klose 2007; AJ 133:1187).
GCN 14806 table
GRB_name GRB130606A
GCN_number 14806
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14806 SUBJECT: GRB 130606A: AAO optical observations DATE: 13/06/07 13:22:00 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), R.Inasaridze (AAO), O. Kvaratskhelia (AAO), V. Ayvazian(AAO), Yu. Krugly (IA KhNU), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift Swift GRB 130606A (Ukwatta et al., GCN 14781)with AS-32 (0.7m) telescope of Abastumani Observatory, starting on Jun. 06 (UT) 21:47:43. We obtained several unfiltered images of 180 s exposure. The afterglow (Jelinek et al., GCN 14782; Xu et al., GCN 14783; Nagayama et al., GCN 14784) is well detected in separate images. Preliminary photometry T_start, Exp, T-t0, d OT +/- err UT s mid, days 21:47:43 180 0.03095 18.84 +/- 0.05 21:51:24 180 0.03351 18.86 +/- 0.04 21:55:04 180 0.03605 18.95 +/- 0.05 21:58:45 2x180 0.03988 19.16 +/- 0.06 is based on SDSS stars R mag, where R mag obtained via transformations ugriz in BVRI (Lupton, 2005): SDSS u g r i z R J163722.96+294541.6 16.747 15.352 14.827 14.598 14.568 14.625 J163734.99+294356.8 18.166 17.023 16.665 16.540 16.503 16.493
GCN 14807 table
GRB_name GRB130606A
GCN_number 14807
Detection_method GROND
Circular_text TITLE: GCN CIRCULAR NUMBER: 14807 SUBJECT: GRB 130606A: GROND Detection of the Optical/NIR Afterglow DATE: 13/06/07 13:29:05 GMT FROM: Jonny Elliott at MPE/GROND P. Afonso (American River College), D. A. Kann, A. Nicuesa Guelbenzu (both TLS Tautenburg), T. Kruehler (DARK), J. Elliott, and J. Greiner (both MPE Garching) report on behalf of the GROND team: We observed the field of GRB 130606A (Swift trigger 557589; Ukwatta et al., GCN #14781) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla Observatory (Chile). Observations started at 03:30 UT on 7th June 2013, 6.4 hours after the GRB trigger. They were performed at an average seeing of 1.1" and at an average airmass of 2.0. We detect the afterglow (Jelinek et al.; GCN #14782) at the position of Xu et al. (GCN #14783), and based on images taken at a mid-time of 05:00 UT, with total exposures of 7.66 minutes in g'r'i'z' and 8 minutes in JHK, we estimate preliminary magnitudes (all in AB) of g' > 24.3 mag, r' = 23.4 +/- 0.2 mag, i' = 21.4 +/- 0.1 mag, z' = 18.8 +/- 0.1 mag, J = 18.4 +/- 0.1 mag, H = 18.1 +/- 0.1 mag, and K = 17.8 +/- 0.2 mag. The spectral energy distribution is best fit with a small amount of LMC-like dust and a spectral slope of beta ~ 0.7. Given magnitudes are calibrated against GROND zeropoints as well as 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.024 mag in the direction of the burst (Schlegel et al. 1998).
GCN 14808 table
GRB_name GRB130606A
GCN_number 14808
Detection_method Konus-Wind Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 14808 SUBJECT: Konus-Wind observation of GRB 130606A DATE: 13/06/07 14:09:41 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team report: The long GRB 130606A (Swift-BAT trigger #557589: Ukwatta et al., GCN 14781) was detected by Konus-Wind in the waiting mode. The burst light curve shows a weak initial pulse followed in ~150 s by a much brighter peak. As observed by Konus-Wind, the burst had a fluence of (4.4 +/- 0.8)x10^-6 erg/cm2 (in the 20 - 1300 keV energy range). Modeling the K-W 3-channel time-integrated spectrum (from T0(BAT)+153 s to T0(BAT)+165 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields alpha = -1.14 +/- 0.15, and Ep = 294(-50,+90) keV. Assuming z = 5.91 (Castro-Tirado et al., GCN 14796; Chornock et al. GCN 14798) and a standard cosmology model with H_0 = 71 km/s/Mpc, Omega_M = 0.27, Omega_Lambda = 0.73, the isotropic energy release is E_iso = (2.83 +/- 0.52)x10^53 erg in 1 keV to 10 MeV at the GRB rest frame extrapolating the best exponential cutoff function fit. All the quoted errors are estimated at the 1 sigma confidence level. The K-W light curve of this burst is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB130606A/
GCN 14811 table
GRB_name GRB130606A
GCN_number 14811
Detection_method Swift-XRT Det
ra 249.3963°
decl 29.7962°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14811 SUBJECT: GRB 130606A: Enhanced Swift-XRT position DATE: 13/06/07 15:17:53 GMT FROM: Phil Evans at U of Leicester J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team. Using 3364 s of XRT Photon Counting mode data and 8 UVOT images for GRB 130606A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 249.39633, +29.79622 which is equivalent to: RA (J2000): 16h 37m 35.12s Dec (J2000): +29d 47' 46.4" with an uncertainty of 1.5 arcsec (radius, 90% confidence). This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN 14812 table
GRB_name GRB130606A
GCN_number 14812
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14812 SUBJECT: GRB 130606A: Swift-XRT refined Analysis DATE: 13/06/07 16:26:03 GMT FROM: Phil Evans at U of Leicester D.N. Burrows (PSU), B.P. Gompertz (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), V. D'Elia (ASDC), A. Maselli (INAF-IASFPA), V. Mangano (INAF-IASFPA), J.A. Kennea (PSU), M.C. Stroh (PSU) and T.N. Ukwatta report on behalf of the Swift-XRT team: We have analysed 7.6 ks of XRT data for GRB 130606A (Ukwatta et al. GCN Circ. 14781), from 62 s to 58.7 ks after the BAT trigger. The data comprise 499 s in Windowed Timing (WT) mode (the first 9 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 14811). The late-time light curve (from T0+5.3 ks) can be modelled with a power-law decay with a decay index of alpha=1.13 (+0.10, -0.09). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.55 (+/-0.04). The best-fitting absorption column is 8.4 (+/-1.0) x 10^20 cm^-2, in excess of the Galactic value of 2.0 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.84 (+0.15, -0.14) and a best-fitting absorption column of 4.5 (+3.1, -2.5) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.8 x 10^-11 (4.2 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 4.5 (+3.1, -2.5) x 10^20 cm^-2 Galactic foreground: 2.0 x 10^20 cm^-2 Excess significance: <1.6 sigma Photon index: 1.84 (+0.15, -0.14) If the light curve continues to decay with a power-law decay index of 1.13, the count rate at T+24 hours will be 0.011 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.3 x 10^-13 (4.8 x 10^-13) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00557589. This circular is an official product of the Swift-XRT team.
GCN 14814 table
GRB_name GRB130606A
GCN_number 14814
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14814 SUBJECT: GRB 130606A: Swift/UVOT Upper Limits DATE: 13/06/07 20:02:03 GMT FROM: Tyler Pritchard at PSU T. A. Pritchard (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 130606A 84 s after the BAT trigger (Ukwatta et al., GCN Circ. 14781). No optical afterglow consistent with the optical position (Xu et al., GCN Circ 15783) is detected in the initial UVOT exposures. Aspect correction was lost in a number of sub-exposures resulting in image streaks, rough aspect corrections and larger apertures have been used to calibrate the field, although with a lower sensitivity. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 84 231 144 >21.1 u_FC 293 543 246 >20.3 white 84 6539 361 >22.1 v 5314 12245 1148 >20.6 b 549 6334 236 >20.7 u 293 18354 561 >20.4 w1 672 18247 1102 >21.1 m2 5519 15930 625 >20.5 w2 1028 6744 216 >20.1 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
GCN 14815 table
GRB_name GRB130606A
GCN_number 14815
Detection_method Optical
redshift 5.9100
Circular_text TITLE: GCN CIRCULAR NUMBER: 14815 SUBJECT: GRB 130606A: Skynet/PROMPT detection of the optical afterglow DATE: 13/06/07 20:46:16 GMT FROM: Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet A. Trotter, A. LaCluyze, D. Reichart, J. Haislip, T. Berger, M. Carroll, H. T. Cromartie, R. Egger, A. Foster, C. Foster, N. Frank, K. Ivarsen, D. James, M. Maples, J. Moore, M. Nysewander, E. Speckhard, P. Taylor and J. A. Crain report: Skynet observed field of GRB 130606A (Ukwatta et al., GCN 14781, Swift trigger #557589), using the optical localization of Xu et al. (GCN 14783). It took ~150 160-second exposures in each of the g', R and z' bands with three 16" telescopes of the PROMPT array at CTIO, Chile, starting at 2013-06-07, 00:47 UT (t=3.75h post-trigger), and continuing until t=9.7h. We detect a fading afterglow in the z' band in most individual exposures, with z~18.5 at t~6.3h, and an approximate temporal index alpha~-1.4. We do not detect the afterglow in the R or g' bands in individual exposures, consistent with the spectroscopic redshift z=5.91 reported by Castro-Tirado et al. (GCN 14796). Stacks of ~70 160-second exposures at a mean time t~5.7h yield a questionable R~21.9 detection and a 3-sigma upper limit g'>23.7. Similar stacks at t~8.5h yield 3-sigma upper limits R>22.7 and g'>23.6. A preliminary light curve is at: http://www.skynet.unc.edu/grb/grb130606a.png Photometry is calibrated to 10 SDSS stars in the field; g' and z' magnitudes are in the AB system; R-band magnitudes are in the Vega system, with the SDSS calibration stars transformed according to Jester (2005). No correction has been applied for the expected line-of-sight Milky Way extinction of E(B-V)=0.02 (Schlegel et al. 1998). Further Skynet observations are scheduled.
GCN 14816 table
GRB_name GRB130606A
GCN_number 14816
Detection_method Optical
redshift 5.9130
Circular_text TITLE: GCN CIRCULAR NUMBER: 14816 SUBJECT: GRB 130606A: VLT/X-shooter redshift confirmation DATE: 13/06/07 21:11:06 GMT FROM: Dong Xu at DARK/NBI D. Xu (DARK/NBI), D. Malesani (DARK/NBI), S. Schulze (PUC and MCSS), J. P. U. Fynbo (DARK/NBI), Valerio D'Elia (ASI-SDC, INAF OAR), P. Goldoni (APC/Univ. Paris 7 and SAp/CEA), O. Hartoog (Amsterdam), J. Hjorth (DARK/NBI), L. Kaper (Amsterdam), T. Kruehler (DARK/NBI), A. J. Levan (U. Warwick), B. Milvang-Jensen (DARK/NBI), N. R. Tanvir (U. Leicester), K. Wiersema (U. Leicester) report on behalf of the X-shooter GRB GTO collaboration: We observed the optical afterglow of GRB 130606A (Ukwatta et al., GCN 14781; Jelinek et al., GCN 14782; Xu et al., GCN 14783) using the ESO VLT equipped with the X-shooter spectrograph. The observations started on 2013-06-07 at 04:09 UT (i.e., 7.08 hr after the burst). A total exposure of 6x600 s was obtained, covering the spectral range from ~3000 to ~21000 A. A continuum is detected redward of ~8410 A in the VIS/NIR arms of the spectra, consistent with a Lyman alpha dropout at z~5.9, while discrete transmission is present blueward down to ~6505 A. In the spectra prominent absorption lines are detected, such as NV, C II, O I, Si IV, C IV, and Si II, all at a common redshift of z=5.913, fully consistent with the measurements in Castro-Tirado et al. (GCN 14796) and Lunnan et al. (GCN 14798). We also identified at least two intervening absorbers at z=3.451 and at z=2.310 through Mg II and Fe II, respectively. We thank the Paranal staff for enthusiastic support, in particular Cedric Ledoux and Felipe Gaete.
GCN 14817 table
GRB_name GRB130606A
GCN_number 14817
Detection_method VLA Det
ra 249.3964°
decl 29.7962°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14817 SUBJECT: GRB 130606A: EVLA detection DATE: 13/06/07 22:41:49 GMT FROM: Tanmoy Laskar at Harvard U T. Laskar, A. Zauderer, and E. Berger (Harvard) report: "We observed the position of GRB 130606A (Ukwatta et al; GCN 14781) with the EVLA beginning on 2013 June 07.30 UT (0.59 days after the burst). At a mean frequency of 21.8 GHz, we detect a radio source with a preliminary flux density of ~ 0.1 mJy at RA = 16:37:35.134 +/- 0.004 Dec = 29:47:46.47 +/- 0.06, consistent with the enhanced Swft/XRT position (Burrows et al.; GCN 14812), the NIR position (Xu et al.; GCN 14783, Nagayama et al.; GCN 14784), and the optical position (Masi and Nocentini; GCN 13891, Leonini et al.; GCN 14791). Follow-up observations are planned."
GCN 14818 table
GRB_name GRB130606A
GCN_number 14818
Detection_method Optical
redshift 5.9000
Circular_text TITLE: GCN CIRCULAR NUMBER: 14818 SUBJECT: GRB 130606A: TAROT Calern observatory early optical observations DATE: 13/06/07 23:34:40 GMT FROM: Alain Klotz at IRAP-CNRS-OMP Klotz A. (IRAP-CNRS-OMP), Gendre B. (IRAP-CNRS-OMP), Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report: We imaged the field of GRB 130606A detected by SWIFT (trigger 557589) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 7.1 min after the GRB trigger The elevation of the field increased from 63 degrees above horizon and weather conditions were good. We detect the optical transient (OT) discovered by Jelinek et al. (GCNC 14782). TAROT images are unfiltered. The redshift 5.9 means the OT should emit mainly in the I band. At the present level of analysis we can not give the flux of the OT refered in the I band. We choose the zero point of magnitudes using the star NOMAD-1 1197-0254828 (R=16.43). We refer the TAROT magnitudes to the R magnitude of the reference star (we use CR as the symbol of the clear filtered image calibrated with the R magnitude of the reference star). At 7.85 minutes after the GRB, CR=17.1 The OT is measured continuously until 141 minutes with a mean decay of 0.9. This message may be cited.
GCN 14819 table
GRB_name GRB130606A
GCN_number 14819
Detection_method Swift-BAT Det
ra 249.3900°
decl 29.7960°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14819 SUBJECT: GRB 130606A, Swift-BAT refined analysis DATE: 13/06/07 23:39:13 GMT FROM: Tilan Ukwatta at MSU S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 130606A (trigger #557589) (Ukwatta, et al., GCN Circ. 14781). The BAT ground-calculated position is RA, Dec = 249.390, 29.796 deg which is RA(J2000) = 16h 37m 33.6s Dec(J2000) = +29d 47' 44.5" with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%. The mask-weighted light curve shows multiple peaks. The first peak starts around T-5 secs and last for 15 seconds, a cluster of weak peaks can be seen from T+80 sec to T+110 sec, bright two peak structure is seen from T+150 sec to T+ 170 sec, finally very weak extended multi-peak structure is observed beyond T+200 sec up to T+500 sec. T90 (15-350 keV) is 276.58 +- 19.31 sec (estimated error including systematics). The time-averaged spectrum from T-1.34 to T+297 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.52 +- 0.12. The fluence in the 15-150 keV band is 2.9 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+160.36 sec in the 15-150 keV band is 2.6 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/557589/BA/
GCN 14824 table
GRB_name GRB130606A
GCN_number 14824
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 14824 SUBJECT: GRB 130606A: Continued RATIR Optical and NIR Monitoring DATE: 13/06/08 13:54:51 GMT FROM: Nat Butler at UC berkeley Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB) J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UCSC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos A. de Diego (UNAM), Leonid Georgiev (UNAM), Jess Gonzlez (UNAM), Carlos Romn-Ziga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We observed the field of GRB 130606A (Ukwatta, et al., GCN 14781) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronmico Nacional on Sierra San Pedro Mrtir from 2013/06 8.18 to 2013/06 8.46 UTC (31.14 to 37.86 hours after the BAT trigger), obtaining a total of 4.96 hours exposure in the r' and i' bands and 2.07 hours exposure in the Z, Y, J, and H bands. The optical/NIR afterglow (Jelinek, et al., GCN 14782; Xu et al., GCN 14783) is well detected. In comparison with SDSS DR9 and 2MASS, we obtain the following detections and 3-sigma upper limit: r' >24.06 i' 24.06 +/- 0.27 Z 21.50 +/- 0.09 Y 21.41 +/- 0.12 J 21.16 +/- 0.12 H 20.78 +/- 0.12 These magnitudes are in the AB system and not corrected for Galactic extinction in the direction of the GRB. In comparison to our observations on the previous night (2013/06/07; Butler, et al., GCN 14799), the afterglow has faded by about 3 magnitudes in all bands. We thank the staff of the Observatorio Astronmico Nacional in San Pedro Mrtir.
GCN 14826 table
GRB_name GRB130606A
GCN_number 14826
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 14826 SUBJECT: GRB 130606A: Continued Skynet/PROMPT observations DATE: 13/06/08 18:21:21 GMT FROM: Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet A. Trotter, A. LaCluyze, D. Reichart, J. Haislip, T. Berger, M. Carroll, H. T. Cromartie, R. Egger, A. Foster, C. Foster, N. Frank, K. Ivarsen, D. James, M. Maples, J. Moore, M. Nysewander, E. Speckhard, P. Taylor and J. A. Crain report: Skynet continued observing the field of GRB 130606A (Ukwatta et al., GCN 14781, Swift trigger #557589), using the optical localization of Xu et al. (GCN 14783). It took 109 160-second exposures in the z' band with one of the 16" telescopes of the PROMPT array at CTIO, Chile, with a mean time t=1.3d post-trigger. In a stack of all 109 exposures, we detect the afterglow at the 5-sigma level, with z'~20.5 at t=1.3d. Together with the z' detections we reported in Trotter et al. (GCN 14815), this implies an approximate temporal index alpha~-1.2. A preliminary light curve of both nights' data is at: http://www.skynet.unc.edu/grb/grb130606a_2.png Photometry is calibrated to 10 SDSS stars in the field; g' and z' magnitudes are in the AB system; R-band magnitudes are in the Vega system, with the SDSS calibration stars transformed according to Jester (2005). No correction has been applied for the expected line-of-sight Milky Way extinction of E(B-V)=0.02 (Schlegel et al. 1998). No further Skynet observations are scheduled.
GCN 14840 table
GRB_name GRB130606A
GCN_number 14840
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14840 SUBJECT: GRB 130606A - Liverpool Telescope and Faulkes Telescope North optical observations DATE: 13/06/09 21:43:42 GMT FROM: Francisco Virgili at Liverpool John Moores U F.J. Virgili, C.G. Mundell (LJMU), A. Melandri (INAF-OAB), and A. Gomboc (U. Ljubljana) report: Observations of GRB 130606A (Ukwatta et al., GCN 14781) with the 2-m robotic Liverpool Telescope automatically performed between 48 and 80 minutes after the GRB trigger confirms a detection of the afterglow in the r'-band with magnitude r' = 21.9 0.29 at 49.95 minutes consistent with reported values at similar epochs (Xu et al. 14783) and dimmer than times around 100 minutes post trigger (Leonini et al., GCN 14791; Masi et al., GCN 14789; Sonbas et al., GCN 14797), possibly indicating mild re-brightening. This detection clarifies that the afterglow has not yet dropped out of the r'-band at the times coincident with our i' and z' band detections (Virgili et al., GCN 14785) and continues to be detected until at least 6.4 hrs after the initial trigger (Afonso et al., GCN 14807). In addition, the 2-m Faulkes Telescope North and Liverpool Telescope performed late-time follow up observations, resulting in a 3-sigma upper-limit of r' > 23.4 at 849.73 min (14.16 hr post-trigger; FTN) r' > 24 at 1683.67 minutes (= 28.06 hr; LT) and an additional i'-band detection of i' = 23.76 0.22 @ 28.60 hr (= 1716.51 minutes; LT), in a co-added series of 6x300s exposures, which are consistent with values reported by Trotter et al. (GCN 14815) and Butler et al. (GCN 14824). FTN images have been acquired with the R-Bessell filter and calibrated against nearby SDSS catalogue stars.
GCN 14864 table
GRB_name GRB130606A
GCN_number 14864
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14864 SUBJECT: GRB 130606A: CrAO optical upper limit DATE: 13/06/11 00:18:42 GMT FROM: Alexei Pozanenko at IKI, Moscow V. Rumyantsev (CrAO), N.Pit' (CrAO), А. Volnova (IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 130606A (Ukwatta et al., GCN 14781) with AZT-11 telescope of CrAO observatory starting on June 06 (UT) 21:59:60. We took several images in R-filter of 180 s exposure. The afterglow (Jelinek et al., GCN 14782; Xu et al., GCN 14783; Nagayama et al., GCN 14784) is not detected in a combined image. A photometry is based on the same SDSS stars we used in GCN 14806: Start T0+, Filter Exposure, OT, UL (3 sigma) UT mid, d (s) 21:59:60 0.0489 R 10x180 n/d 20.7
GCN 15230 table
GRB_name GRB130606A
GCN_number 15230
Detection_method Swift-XRT Other
redshift 5.9100
Circular_text TITLE: GCN CIRCULAR NUMBER: 15230 SUBJECT: GRB 130606A: Chandra observation DATE: 13/09/17 13:12:11 GMT FROM: Tanmoy Laskar at Harvard U W. Fong, T. Laskar, E. Berger, and R. Margutti (Harvard) report: "We observed GRB 130606A (Ukwatta et al., GCN 14781) with the Chandra ACIS instrument, starting on 2013 June 17 03:05:37 UT (10.3 days after the GRB trigger), for a total exposure of 30 ks. We detect a point source at the position of the Swift/XRT afterglow. Using the spectral parameters from the Swift/XRT PC-mode spectrum (http://www.swift.ac.uk/xrt_products/00557589) and a redshift of z=5.91 (Chornock et al. 2013, ApJ, 774, 26; Castro-Tirado et al., GCN 14796; Lunnan et al., GCN 14798; Xu et al., GCN 14816), we find an unabsorbed flux of (2.4 +/- 0.4)e-15 erg/(s cm^2) in the 0.3-10 keV band. This measurement is consistent with an extrapolation of the Swift/XRT observations and shows a continuing decline in flux with a power-law decay slope of -1.8 +/- 0.1 between 0.1 and 10 days after the burst. We thank Harvey Tananbaum for approving our DDT request and the CXC staff for rapidly arranging and executing the observations."