GRB130610A

This page lists all entries on GRB130610A in GRBweb

Summary Fermi GBM IPN Swift GCN 14842 GCN 14843 GCN 14844 GCN 14845 GCN 14846 GCN 14848 GCN 14849 GCN 14851 GCN 14853 GCN 14854 GCN 14858 GCN 14859 GCN 14860 GCN 14891 GCN 14907 GCN 14908

Summary table
Variable Value Source
GRB_name_Fermi GRB130610133
T0 3:12:07.942 UTC Fermi_GBM
ra 224.4203° Swift
decl 28.2072° Swift
pos_error 6.60e-05° Swift
T90 21.76 s Fermi_GBM
T90_error 1.639 s Fermi_GBM
T90_start 3:12:07.942 UTC Fermi_GBM
fluence 3.54e-06 erg/cm² Fermi_GBM
fluence_error 4.60e-08 erg/cm² Fermi_GBM
redshift 2.0920 GCN_circulars,Swift-XRT Other
T100 51.458 s
GBM_located False
mjd 56453.13342525463 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB130610133
trigger_name bn130610133
ra 224.4200°
decl 28.2100°
pos_error 3.45e+00°
datum 2013-06-10
t_trigger 3:12:10.502 UTC
T90 21.76 s
T90_error 1.639 s
T90_start 3:12:07.942 UTC
fluence 3.54e-06 erg/cm²
fluence_error 4.60e-08 erg/cm²
flux_1024 2.86e+00 erg/cm²/s
flux_1024_error 2.50e-01 erg/cm²/s
flux_1024_time 3.78e+00 erg/cm²/s
flux_64 5.21e+00 erg/cm²/s
flux_64_error 1.53e+00 erg/cm²/s
IPN table
GRB_name GRB130610A
ra 224.4167°
decl 28.1833°
pos_error 5.00e-02°
redshift 2.0920
Swift table
GRB_name GRB130610A
t_trigger 3:12:13 UTC
ra 224.4203°
decl 28.2072°
pos_error 6.60e-05°
T90 46.4 s
fluence 2.50e-06 erg/cm²
redshift 2.0920
GCN 14842 table
GRB_name GRB130610A
GCN_number 14842
Detection_method Swift Det
t_trigger 3:12:13 UTC
ra 224.4160°
decl 28.1910°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14842 SUBJECT: GRB 130610A: Swift detection of a burst with an optical counterpart DATE: 13/06/10 03:21:59 GMT FROM: David Palmer at LANL J. R. Cummings (NASA/UMBC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), D. Malesani (DARK/NBI), C. B. Markwardt (NASA/GSFC), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), D. M. Palmer (LANL), T. Sakamoto (AGU), M. H. Siegel (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team: At 03:12:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130610A (trigger=557845). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 224.416, +28.191 which is RA(J2000) = 14h 57m 40s Dec(J2000) = +28d 11' 28" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a total duration of about 30 sec. The peak count rate was ~2700 counts/sec (15-350 keV), at ~5 sec after the trigger. The XRT began observing the field at 03:14:26.3 UT, 133.0 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 224.4218, 28.2048 which is equivalent to: RA(J2000) = +14h 57m 41.23s Dec(J2000) = +28d 12' 17.3" with an uncertainty of 6.6 arcseconds (radius, 90% containment). This location is 52 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy. UVOT took a finding chart exposure of 150 seconds with the White filter starting 140 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at RA(J2000) = 14:57:40.89 = 224.42037 DEC(J2000) = +28:12:25.7 = 28.20715 with a 90%-confidence error radius of about 0.62 arc sec. This position is 9.6 arc sec. from the center of the XRT error circle. The estimated magnitude is 17.91 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02. Burst Advocate for this burst is J. R. Cummings (jayc AT milkyway.gsfc.nasa.gov). 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 14843 table
GRB_name GRB130610A
GCN_number 14843
Detection_method Optical
ra 224.4204°
decl 28.2071°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14843 SUBJECT: GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation DATE: 13/06/10 03:52:01 GMT FROM: Francisco Virgili at Liverpool John Moores U A. Melandri (INAF-OAB), F.J. Virgili(LJMU), C.G. Mundell (LJMU) and A. Gomboc (U. Ljubljana) report: The 2-m Liverpool Telescope robotically followed up GRB130610A (Swift trigger 557845, Cummings et al., GCN 14842) 15.5 min after the GRB trigger time observing with SLOAN-gri filters. The automatic LT-TRAP procedure detected an uncatalogued fading source candidate at: RA = 14:57:40.89 Dec = +28:12:25.5 (J2000) with magnitude R~17.9 mag (vs USNOB1) ~16 min after the burst trigger. The object is clearly fading in all filters. Observations and analysis are ongoing. [GCN OPS NOTE(10jun13): The GRB name in the firt sentence was changed from "130410A" to "130610A".]
GCN 14844 table
GRB_name GRB130610A
GCN_number 14844
Detection_method Optical
ra 224.4204°
decl 28.2071°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14844 SUBJECT: GRB 130610A: Skynet/PROMPT detection of the optical afterglow DATE: 13/06/10 03:57:35 GMT FROM: Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet A. Trotter, J. Haislip, A. LaCluyze, D. Reichart, 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 the Swift/XRT localization of GRB 130610A (Cummings et al., GCN 14842, Swift trigger #557845), starting at 2013-06-10, 03:14:05 UT (t=2.03m post-trigger), with three 16" telescopes of the PROMPT array at CTIO, Chile. We detect a fading afterglow in B, V and I bands at: RA = 14:57:40.9, Dec = 28:12:25.5 (J2000), consistent with the UVOT source position reported in GCN 14842. The afterglow rises until t~3.4m, at which time the apparent magnitudes are B~18.1, V~17.1, I~16.6. A preliminary light curve is at: http://www.skynet.unc.edu/grb/grb130610a.png Magnitudes are in the Vega system and photometry is calibrated to 4 SDSS stars in the field. Skynet observations are ongoing.
GCN 14845 table
GRB_name GRB130610A
GCN_number 14845
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 14845 SUBJECT: GRB 130610A: PAIRITEL NIR Afterglow Observations DATE: 13/06/10 04:04:56 GMT FROM: Adam Morgan at U.C. Berkeley A. N. Morgan & C. R. Klein (UC Berkeley) report: We observed the field of GRB 130610A (Cummings et al., GCN 14842) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at 2013-Jun-07 03h35m37s UT, 0.39 hr after the Swift Trigger. In mosaics (effective exposure time of ~5.85 minutes) taken simultaneously in the J, H, and Ks filters, we detect the optical afterglow (Cummings et al., GCN 14842; Melandri et al., GCN 14843; Trotter et al. GCN 14844). The preliminary K-band reduction is corrupted. The preliminary photometry yields: post burst t_mid (hr) exp.(m) filt mag m_err 0.47 5.85 J 17.49 0.16 0.47 5.85 H 16.95 0.20 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 14846 table
GRB_name GRB130610A
GCN_number 14846
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14846 SUBJECT: GRB 130610A: P60 Observations DATE: 13/06/10 05:19:12 GMT FROM: S. Bradley Cenko at Caltech S. B. Cenko (NASA/GSFC) and D. A. Perley (Caltech) report on behalf of a larger collaboration: We have imaged the optical afterglow of the Swift GRB 130610A (Cummings et al., GCN 14842) with the robotic Palomar 60 inch telescope. A series of 90 s exposures in the g', r', i', and z' filters were begun starting at 04:23 UT on 2013 Jun 10 (1.18 hr after the Swift trigger). We detect the afterglow in individual exposures in all 4 filters. Using nearby point sources from SDSS for calibration, we measure a magnitude of r' = 19.8 in our initial images. Compared with earlier observations with the Liverpool telescope (Melandri et al., GCN 14843), this suggests a power-law decay index of ~ 1.2.
GCN 14848 table
GRB_name GRB130610A
GCN_number 14848
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14848 SUBJECT: GRB 130610A: VLT/UVES redshift DATE: 13/06/10 07:11:49 GMT FROM: Alain Smette at ESO/Chile A. Smette (ESO), C. Ledoux (ESO), P. Vreeswijk (Weizmann), A. De Cia (Weizmann)**, P. Petitjean (IAP), J. Fynbo (DARK/NBI), D. Malesani (DARK/NBI), A. Fox (STSCI) report: We have observed GRB 130610A (Cummings et al., GCN 14842) with UVES on the ESO-VLT, in Rapid Response Mode. Preliminary analysis of the automatically reduced spectra reveals the presence of an absorption line system at z ~ 2.092 including a damped Ly-alpha line, CIV 1548 &1550, SiIV 1393 & 1402, SiII 1260 & 1526 FeII 1608, 2382, 2600, AlII1670, AlIII 1854 & 1862. This absorption line system can be identified with the gamma-ray burst redshift. We are grateful to the excellent support provided by Christophe Martayan and Felipe Gaete.
GCN 14849 table
GRB_name GRB130610A
GCN_number 14849
Detection_method Swift-BAT Det
ra 224.4140°
decl 28.1870°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14849 SUBJECT: GRB 130610A, Swift-BAT refined analysis DATE: 13/06/10 13:40:50 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift C. B. Markwardt (GSFC), 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), 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-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 130610A (trigger #557845) (Cummings, et al., GCN Circ. 14842). The BAT ground-calculated position is RA, Dec = 224.414, 28.187 deg which is RA(J2000) = 14h 57m 39.3s Dec(J2000) = +28d 11' 13.8" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%. The mask-weighted light curve shows a single FRED peak. T90 (15-350 keV) is 46.4 +- 11.2 sec (estimated error including systematics). The time-averaged spectrum from T-7.04 to T+61.02 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.27 +- 0.08. The fluence in the 15-150 keV band is 2.5 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+4.53 sec in the 15-150 keV band is 1.7 +- 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/557845/BA/
GCN 14851 table
GRB_name GRB130610A
GCN_number 14851
Detection_method Swift-XRT Det
ra 224.4203°
decl 28.2071°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14851 SUBJECT: GRB 130610A: Enhanced Swift-XRT position DATE: 13/06/10 14:44:39 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 7625 s of XRT Photon Counting mode data and 8 UVOT images for GRB 130610A, 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 = 224.42032, +28.20711 which is equivalent to: RA (J2000): 14h 57m 40.88s Dec (J2000): +28d 12' 25.6" with an uncertainty of 1.4 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 14853 table
GRB_name GRB130610A
GCN_number 14853
Detection_method Swift-XRT Other
redshift 2.0920
Circular_text TITLE: GCN CIRCULAR NUMBER: 14853 SUBJECT: GRB 130610A: Swift-XRT refined Analysis DATE: 13/06/10 15:22:03 GMT FROM: Phil Evans at U of Leicester B. Sbarufatti (INAF-OAB/PSU), G. Stratta (ASDC), P. D'Avanzo (INAF-OAB), J.A. Kennea (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), B.P. Gompertz (U. Leicester) and J.R. Cummings report on behalf of the Swift-XRT team: We have analysed 11 ks of XRT data for GRB 130610A (Cummings et al. GCN Circ. 14842), from 139 s to 25.1 ks after the BAT trigger. The data comprise 116 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 14851). The light curve can be modelled with a power-law decay with a decay index of alpha=1.17 (+/-0.03). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.04 (+/-0.15). The best-fitting absorption column is 2.6 (+2.8, -2.6) x 10^21 cm^-2, at a redshift of 2.092, in addition to the Galactic value of 1.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (3.9 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Galactic foreground: 1.9 x 10^20 cm^-2 Intrinsic column: 2.6 (+2.8, -2.6) x 10^21 cm^-2 at z=2.092 Photon index: 2.04 (+/-0.15) If the light curve continues to decay with a power-law decay index of 1.17, the count rate at T+24 hours will be 3.2 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.1 x 10^-13 (1.3 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/00557845. This circular is an official product of the Swift-XRT team.
GCN 14854 table
GRB_name GRB130610A
GCN_number 14854
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 14854 SUBJECT: GRB 130610A: LOAO BVR Observation DATE: 13/06/10 15:24:59 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 field of GRB 130610A (Cummings et al. GCN 14842), using a 1-m telescope at Mt. Lemmon Optical Observatory (LOAO) in Arizona, US. The observation started at 2013-06-10 05:54:16 UT, about 2.7 hrs after the burst alert, and a series of images were taken in B, R, and I-band for about 40 min. We identify the afterglow (Melandri et al. GCN 14843), in all the three bands, with approximate magnitude of B = 21.35 +- 0.12, V=20.90 +- 0.26, and R=20.35 +- 0.18, all in Vega magnitude, calibrated against a star in the vicinity using SDSS photometry converted to BVR. We thank the LOAO operator, In-Kyung Baek for performing the observation.
GCN 14858 table
GRB_name GRB130610A
GCN_number 14858
Detection_method Fermi GBM Det
t_trigger 3:12:10.500 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 14858 SUBJECT: GRB 130610A: Fermi GBM Observation DATE: 13/06/10 18:03:27 GMT FROM: Gerard Fitzpatrick at UCD G. Fitzpatrick (UCD) and V. Pelassa (UAH) report on behalf of the Fermi GBM Team: At 03:12:10.50 UT on 10 June 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 130610A (trigger 392526733 /130610133) which was also detected by the Swift/BAT (Cummings et al., GCN Circ. 14842). The GBM on-ground location is consistent with the Swift position. The GBM light curve consists of a single peak with a duration (T90) of about 28 s (50-300 keV). The time-averaged spectrum from T0-2.6 s to T0+25.7 s is adequately fit by a power law function with an exponential high-energy cutoff. The power law index is -1.0 +/- 0.1 and the cutoff energy, parameterized as Epeak, is 294.9 +/- 42.9 keV The event fluence (10-1000 keV) in this time interval is (6.1 +/- 0.4)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+8.0 s in the 10-1000 keV band is 4.5 +/- 0.9 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog.
GCN 14859 table
GRB_name GRB130610A
GCN_number 14859
Detection_method Swift-UVOT Det
ra 224.4203°
decl 28.2072°
Circular_text TITLE: GCN CIRCULAR NUMBER: 14859 SUBJECT: GRB 130610A: Swift/UVOT Observations DATE: 13/06/10 18:12:42 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel (PSU) and J. R. Cummings (NASA/UMBC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 130610A 140 s after the BAT trigger (Cummings et al., GCN Circ. 14842). A fading source consistent with the XRT position (Cummings et al. GCN Circ. 14842) is detected in the initial UVOT exposures. The preliminary UVOT position is: RA (J2000) = 14:57:40.88 = 224.42034 (deg.) Dec (J2000) = +28:12:25.8 = 28.20717 (deg.) with an estimated uncertainty of 0.51 arc sec. (radius, 90% confidence). Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are listed below. The lack of detection in the NUV filters would be consistent with the z=2.1 redshift reported by Smette et al. (GCN Circ. 14848). Filter T_start(s) T_stop(s) Exp(s) Mag white (fc) 140 290 147 17.85+-0.04 white 1491 1857 58 19.56+-0.19 white 5267 6902 393 20.47+-0.15 v 1540 7312 451 >20.07 b 1467 2005 77 19.12+-0.20 b 6498 19320 1754 21.72+-0.38 u 298 441 140 17.67+-0.09 u 1614 1980 58 19.00+-0.30 uvw1 1589 1956 58 >19.05 uvm2 1911 23463 1298 >21.09 uvw2 1863 7108 412 >20.63 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 14860 table
GRB_name GRB130610A
GCN_number 14860
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14860 SUBJECT: GRB 130610A: ISON-NM optical observations DATE: 13/06/10 18:56:07 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), V. Savanevych (KNURE), A. Bryukhovetskiy (NSFCTC), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed of the field of the Swift GRB 130610A (Cummings et al., GCN 14842) with 0.45-m telescope of ISON-NM observatory starting on June, 10 (UT) 03:53:49. Series of 30 s exposures were obtained in clear filter. In the combined images we detect afterglow (Cummings et al., GCN 14842; Melandri et al., GCN 14843; Trotter et al., GCN 14844). Preliminary photometry is based on the SDSS nearby stars: UT start, T0+ Filter Exposure, OT, days s 03:53:49 0.03531 none 25*30 19.33 ± 0.07 04:12:33 0.04831 none 25*30 19.56 ± 0.10
GCN 14891 table
GRB_name GRB130610A
GCN_number 14891
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14891 SUBJECT: GRB 130610A: iTelescope T21 optical observations DATE: 13/06/13 05:26:42 GMT FROM: Veli-Pekka Hentunen at Taurus Hill Obs,A95 Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill Observatory, Varkaus, Finland) report: We have detected GRB 130610A optical afterglow at iTelescope observatory T21 (Mayhill, New Mexico) 0.43m/6.8 astrograph and FLI-PL6303E CCD camera. Three unfiltered images and three photometric R filter images with 300 sec exposure time were made. The afterglow was detected at following position RA 14:57:40.86 and DEC +28:12:26.0 The following magnitudes were obtained from the observations using NOMAD1 1182-0257977 (R=14.110) as the comparison: Tmid(sec)+T0 Filter Exp. time Mag Mag err. 2442 unfiltered 300 19.09CR 0.15 2759 unfiltered 300 19.34CR 0.19 3076 unfiltered 300 19.17CR 0.16 3717 R 300 19.58R 0.32 4034 R 300 19.93R 0.44 4351 R 300 19.93R 0.43
GCN 14907 table
GRB_name GRB130610A
GCN_number 14907
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14907 SUBJECT: GRB 130610A: CrAO optical observations DATE: 13/06/15 23:18:24 GMT FROM: Alexei Pozanenko at IKI, Moscow V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed of the field of the Swift GRB 130610A (Cummings et al., GCN 14842) with Shajn telescope of CrAO starting on June, 10 (UT) 19:03:05. Several exposures of 120 s were obtained in R-filter. In the combined image we clearly detected bright point-like source superimposed on an extended object. Coordinates of the bright object (J2000) 14 57 40.85 +28 12 25.5 (uncertainty of 0.2" in both coordinates) coincide with the afterglow coordinates (Cummings et al., GCN 14842; Melandri et al., GCN 14843). The extended object could be a host galaxy with brightness of R ~ 23.8. Preliminary photometry might be biasedby the extended object and based on the USNO B1.0 star 1182-0253576 14 57 45.41 +28 12 57.7 assuming R=18.98: UT start, T0+ Filter Exposure, OT, UL mid,days s 2013-06-10T19:03:05 0.6860 R 35*120 21.70 +/- 0.05 23.9 A finding chart can be found at http://grb.rssi.ru/GRB130610A/GRB130610a_20130610_R_ZTSh.GIF
GCN 14908 table
GRB_name GRB130610A
GCN_number 14908
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 14908 SUBJECT: GRB 130610A: TAROT La Silla observatory optical observations DATE: 13/06/16 09:32:51 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 130610A detected by SWIFT (trigger 557845) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. The observations started 91s after the GRB trigger (17s after the notice). The elevation of the field decreased from 31 degrees above horizon and weather conditions were good. The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). We recorded the rise of the afterglow discovered by Melandri et al. (GCNC 14843). We used the star NOMAD1 1182-0257977 R.A.=224.3892908 DEC=+28.2065917 R=14.11 to extract the light curve of the rise of the afterglow: start end Rmag (sec) (sec) 91 97 > 17.8 97 103 > 17.8 103 109 > 17.8 109 115 > 17.8 115 121 > 17.8 121 127 17.7 127 133 16.9 133 139 16.5 139 145 16.6 145 151 16.1 Magnitudes are not corrected for galactic dust extinction. After the trailed image a technical problem prevented to obtain next images.