GRB110503A

This page lists all entries on GRB110503A in GRBweb

Summary IPN Swift GCN 11991 GCN 11992 GCN 11993 GCN 11994 GCN 11995 GCN 11996 GCN 11997 GCN 11998 GCN 11999 GCN 12000 GCN 12001 GCN 12002 GCN 12003 GCN 12004 GCN 12005 GCN 12008 GCN 12009 GCN 12010 GCN 12011 GCN 12014

Summary table
Variable Value Source
T0 17:35:41.862 UTC GCN_circulars,Konus-Wind Det
ra 132.7759° Swift
decl 52.2077° Swift
pos_error 6.47e-05° Swift
T90 10.0 s Swift
T90_start 17:35:45 UTC Swift
fluence 1.00e-05 erg/cm² Swift
redshift 1.6130
T100 13.138 s
GBM_located False
mjd 55684.73312340278 GCN_circulars,Konus-Wind Det
IPN table
GRB_name GRB110503A
ra 132.8000°
decl 52.2167°
pos_error 5.00e-02°
redshift 1.6130
Swift table
GRB_name GRB110503A
t_trigger 17:35:45 UTC
ra 132.7759°
decl 52.2077°
pos_error 6.47e-05°
T90 10.0 s
fluence 1.00e-05 erg/cm²
redshift 1.6130
GCN 11991 table
GRB_name GRB110503A
GCN_number 11991
Detection_method Swift Det
t_trigger 17:35:45 UTC
ra 132.8000°
decl 52.2160°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11991 SUBJECT: GRB 110503A: Swift detection of a burst with a bright optical counterpart DATE: 11/05/03 17:59:20 GMT FROM: Scott Barthelmy at NASA/GSFC M. Stamatikos (OSU/NASA/GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), J. M. Gelbord (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), N. P. M. Kuin (UCL-MSSL), O. M. Littlejohns (U Leicester), V. Mangano (INAF-IASFPA), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB), P. T. O\'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (INAF-IASFPA), M. H. Siegel (PSU), R. L. C. Starling (U Leicester), C. A. Swenson (PSU), E. Troja (NASA/GSFC/ORAU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team: At 17:35:45 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 110503A (trigger=452685). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 132.800, +52.216 which is RA(J2000) = 08h 51m 12s Dec(J2000) = +52d 12' 56" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single structure with a duration of about 10 sec. The peak count rate was ~17,000 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 17:37:19.2 UT, 93.6 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 132.7778, +52.2067 which is equivalent to: RA(J2000) = 08h 51m 06.67s Dec(J2000) = +52d 12' 24.1" with an uncertainty of 5.1 arcseconds (radius, 90% containment). This location is 58 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 nominal 150.000 seconds with the White filter starting 212 seconds after the BAT trigger. There is a candidate afterglow in the list of sources generated on-board at RA(J2000) = 08:51:06.24 = 132.77598 DEC(J2000) = +52:12:27.5 = 52.20764 with a 90%-confidence error radius of about 1.10 arc sec. This position is 5.2 arc sec. from the center of the XRT error circle. The estimated magnitude is 15.75. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02. Burst Advocate for this burst is M. Stamatikos (Michael.Stamatikos-1 AT 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 11992 table
GRB_name GRB110503A
GCN_number 11992
Detection_method Swift-XRT Det
ra 132.7760°
decl 52.2075°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11992 SUBJECT: GRB 110503A: Enhanced Swift-XRT position DATE: 11/05/03 21:46:18 GMT FROM: Phil Evans at U of Leicester M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team. Using 995 s of XRT Photon Counting mode data and 1 UVOT images for GRB 110503A, 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 = 132.77598, +52.20753 which is equivalent to: RA (J2000): 08h 51m 6.24s Dec (J2000): +52d 12' 27.1" with an uncertainty of 1.8 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 11993 table
GRB_name GRB110503A
GCN_number 11993
Detection_method Other
redshift 1.6130
Circular_text TITLE: GCN CIRCULAR NUMBER: 11993 SUBJECT: GRB 110503A: Redshift from 10.4m GTC DATE: 11/05/03 22:50:27 GMT FROM: Antonio Deugarte at IAA-CSIC A. de Ugarte Postigo (DARK/NBI), A.J. Castro-Tirado, J.C. Tello (IAA-CSIC), A. Cabrera Lavers, D. Reverte (GTC) report on behalf of a larger collaboration: We have observed the afterglow of GRB 110503A (Stamatikos et al. GCNC11991) using OSIRIS at the 10.4m GTC telescope (La Palma, Spain). Observations consisted on 2x900s using the R500B grating, starting at 21:36UT (4.0h after the burst). In a preliminary analysis, using archival calibrations, we detect a high signal to noise ratio continuum with absorption features that include SiIV, SiII, CIV, FeII, AlII, AlIII, ZnII, MgII and MgI at a common redshift of z=1.613, which we identify as the redshift of the afterglow.
GCN 11994 table
GRB_name GRB110503A
GCN_number 11994
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 11994 SUBJECT: GRB 110503A: NOT afterglow photometry DATE: 11/05/03 22:52:47 GMT FROM: Giorgos Leloudas at Dark Cosmology Centre G. Leloudas (DARK/NBI), D. Xu (WIS), A. de Ugarte Postigo (DARK/NBI), P. Jakobsson (U. Iceland), L. Guaita, A. Sandberg (OKC/Stockholm), report on behalf of a larger collaboration. We used the Nordic Optical Telescope (La Palma, Spain) equipped with MOSCA to observe GRB 110503A (Stamatikos et al., GCN 11991). Observations were conducted in the UBVRI filters starting at 21:18 UT (222.3 min after the BAT trigger). The exposure times were 600, 300, 300, 300 and 400 s respectively. The afterglow is well detected in all filters at a position consistent with the UVOT observations (Stamatikos et al., GCN 11991). Photometry, using stars 1422-0232263 and 1422-0232264 of the USNO B1.0 catalog as comparison, gives B ~ 19.7 and R ~ 19.3.
GCN 11995 table
GRB_name GRB110503A
GCN_number 11995
Detection_method Swift-BAT Det
ra 132.7990°
decl 52.2110°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11995 SUBJECT: GRB 110503A: Swift-BAT refined analysis DATE: 11/05/03 23:14:58 GMT FROM: Scott Barthelmy at NASA/GSFC T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-124 to T+689 sec from recent telemetry downlinks, we report further analysis of BAT GRB 110503A (trigger #452685) (Stamatikos, et al., GCN Circ. 11991). The BAT ground-calculated position is RA, Dec = 132.799, 52.211 deg which is RA(J2000) = 08h 51m 11.8s Dec(J2000) = +52d 12' 40.4" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 11%. The mask-weighted light curve shows a single FRED-like peak starting at ~T-4 sec, peaking at ~T+0.2 sec, and returning to background around T+20 sec. There there is a long low-level emission from T+50 to T+200 sec. T90 (15-350 keV) is 10.0 +- 3.5 sec (estimated error including systematics). The time-averaged spectrum from T-6.6 to T+16.3 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.88 +- 0.25, and Epeak of 133 +- 54 keV (chi squared 84.4 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 1.00 +- 0.04 x 10^-5 erg/cm2 and the 1-sec peak flux measured from T-0.12 sec in the 15-150 keV band is 29.7 +- 1.5 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.35 +- 0.06 (chi squared 95.5 for 57 d.o.f.). 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/452685/BA/
GCN 11996 table
GRB_name GRB110503A
GCN_number 11996
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11996 SUBJECT: GRB 110503A - TLS Afterglow Observations DATE: 11/05/03 23:19:12 GMT FROM: Alexander Kann at TLS Tautenburg D. A. Kann, S. Schmidl, C. Hoegner, B. Stecklum, S. Schumann and M. Hartmann (TLS Tautenburg) report: We observed the afterglow of GRB 110503A (M. Stamatikos et al., GCN 11991, G. Leloudas et al., GCN 11994) at z=1.613 (A. de Ugarte Postigo et al., GCN 11993) with the 2m/1.34m Schmidt telescope of the Thueringer Landessternwarte Tautenburg under excellent observing conditions (low airmass, good transparency and seeing) starting during dawn at 0.098715 days after the GRB. Observations consisted of 3 x 180 s each in Z, Ic, Rc, V, B, followed by 3 x 300 s each in Z, Ic, Rc, V, B. The afterglow is detected on the single images. Assuming the USNO-B1.0 1421-0227752 star at RA = 08:51:10.01 (132.791692) Dec. = +52:11:04.75 (+52.184653) has R = 16.91 (mean of R1 and R2 mags, 0.06 mags difference), we find for two Rc band observations: t (days after trigger) = 0.1187616, Rc = 19.07 +/- 0.03 t (days after trigger) = 0.1750347, Rc = 19.51 +/- 0.04 Errors are statistical only. Observations are continuing as weather permits with 600 s exposures in all five colors. This message may be cited.
GCN 11997 table
GRB_name GRB110503A
GCN_number 11997
Detection_method Optical
redshift 1.6100
Circular_text TITLE: GCN CIRCULAR NUMBER: 11997 SUBJECT: GRB 110503A: redshift confirmation from TNG DATE: 11/05/04 00:28:12 GMT FROM: Paolo D'Avanzo at INAF-OAB P. D'Avanzo (INAF/OAB), V. D'Elia (ASI/ASDC), L. Di Fabrizio, A. Gurtu (INAF/TNG), report on behalf of a larger collaboration: We observed the optical afterglow of GRB 110503A (Stamatikos et al. GCN 11991) with the Italian TNG located in La Palma, equipped with the DOLORES camera in spectroscopic mode. The optical afterglow (Leloudas et al. GCN 11994; Kann et al. GCN 11996) is clearly detected in the unfiltered acquisition image, with a magnitude R~19.5 at at t-t0=4.85 hours (using the calibration of Kann et al. GCN 11996). A low-resolution spectrum was taken at a mean time t-t0=5.25 hours. The adopted grism was LR-B, covering the wavelength range 3900-8200 AA with a resolution of R~600. Using a preliminary wavelength calibration we clearly detect several absorption features, including CIV, SiII, AlIII, AlII, MgII and MgI, all at a common redshift z=1.61, in agreement with the value reported by de Ugarte Postigo et al. (GCN 11993). At the same redshift we also detect the fine structure line SiII*1533. This absorption feature is likely produced in the GRB host, further supporting the statement that z=1.61 is the afterglow redshift.
GCN 11998 table
GRB_name GRB110503A
GCN_number 11998
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 11998 SUBJECT: GRB 110503A: PAIRITEL NIR Detection DATE: 11/05/04 06:36:46 GMT FROM: Adam Morgan at U.C. Berkeley A. N. Morgan, and J. S. Bloom (UC Berkeley) report: We observed the field of GRB 110503A (Stamatikos et al., GCN 11991) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona under poor sky conditions. Observations began at 2011-05-04 02:46:35 UT, ~9.2 hours after the Swift Trigger. In mosaics (effective exposure time of 1.28 hours) taken simultaneously in the J and H filters, we marginally detect a source at the optical afterglow location (Stamatikos et al., GCN 11991; Leloudas et al., GCN 11994; Kann et al., GCN 11996). Our preliminary Ks band reduction is corrupted. The preliminary photometry yields: post burst t_mid (hr) exp.(hr) filt mag m_err 10.2 1.28 J 18.19 0.26 10.2 1.28 H 17.86 0.36 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 11999 table
GRB_name GRB110503A
GCN_number 11999
Detection_method Swift-XRT Other
redshift 1.6130
Circular_text TITLE: GCN CIRCULAR NUMBER: 11999 SUBJECT: GRB 110503A: Swift-XRT refined Analysis DATE: 11/05/04 07:00:38 GMT FROM: Kim Page at U.of Leicester K.L. Page (U. Leicester) and M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift-XRT team: We have analysed 8.2 ks of XRT data for GRB 110503A (Stamatikos et al. GCN Circ. 11991), from 166 s to 28.4 ks after the BAT trigger. The data comprise 1.1 ks in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 11992). The light curve can be modelled with a power-law decay with a decay index of alpha=1.059 (+/-0.013). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.86 (+/-0.04). The best-fitting absorption column is 2.2 (+/-0.6) x 10^21 cm^-2, at a redshift of 1.613, in addition to the Galactic value of 2.6 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.01 (+/-0.08) and a best-fitting absorption column of 2.4 (+/-1.0) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.7 x 10^-11 (4.3 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Galactic foreground: 2.6 x 10^20 cm^-2 Intrinsic column: 2.4 (+/-1.0) x 10^21 cm^-2 at z=1.613 Photon index: 2.01 (+/-0.08) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00452685. This circular is an official product of the Swift-XRT team.
GCN 12000 table
GRB_name GRB110503A
GCN_number 12000
Detection_method Swift-UVOT Det
ra 132.7759°
decl 52.2077°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12000 SUBJECT: GRB 110503A: Swift/UVOT Observations DATE: 11/05/04 10:58:36 GMT FROM: Samantha Oates at MSSL S. R. Oates (MSSL-UCL) & M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift-UVOT team The Swift/UVOT began settled observations of the field of GRB 110503A 212s after the trigger (Stamatikos et al., GCN Circ. 11991). We detect a fading source in all filters at a refined position of RA(J2000), DEC(J2000)= 132.77588 deg,52.20767 deg. This is equivalent to: RA (J2000) 8:51:06.21 Dec (J2000) 52:12:27.6 with an estimated uncertainty of 0.5 arcsec (radius, 90% confidence). This is consistent with the UVOT position reported in Stamatikos et al. (GCN Circ. 11991) and with the enhanced position of the X-ray afterglow (Goad et al., GCN Circ. 11992). Preliminary magnitudes using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the finding chart (FC) and summed exposures at the location of the optical afterglow are: Filter T_start(s) T_stop(s) Exp(s) Mag ##################################################### wh (FC) 212 362 147 15.82 +/- 0.02 wh 864 1014 147 17.09 +/- 0.03 v 368 388 20 16.23 +/- 0.14 b 469 488 19 16.79 +/- 0.10 u 445 464 19 15.87 +/- 0.09 uvw1 419 438 19 16.15 +/- 0.15 uvm2 394 414 19 17.27 +/- 0.32 uvw2 519 539 19 17.72 +/- 0.31 ##################################################### The values quoted above 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 12001 table
GRB_name GRB110503A
GCN_number 12001
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12001 SUBJECT: GRB 110503A: SARA-N Observations and Photometric Calibration DATE: 11/05/04 17:13:05 GMT FROM: Adria C. Updike at Clemson U Adria C. Updike (NASA/GSFC), D. A. Kann (TLS Tautenburg), Dieter H. Hartmann (Clemson University), and Ken Rumstay (Valdosta State University) report: We observed the field of GRB 110503A (M. Stamatikos et al., GCN 11991) with the SARA-North 0.9m telescope located at KPNO under good conditions beginning about 13 hours after the trigger and continuing for half an hour. We detect the afterglow in each 120 sec exposure. In a stacked 20 min image with mean time 0.5484375 days after the trigger, we detect the afterglow at R = 20.20 +/- 0.07 using the SDSS-derived magnitude of the comparison star given by Kann et al. (GCN 11996). Further observations are planned. The comparison star utilized by Kann et al. has the following SDSS magnitudes (transformation from Lupton (2005) and Jordi et al. (2006): u = 21.214 g = 18.546 r = 17.166 i = 16.485 z = 16.111 and Vega magnitudes: U = 20.431 B = 19.193 V = 17.802 R = 16.819 I = 15.942 Z = 15.562
GCN 12002 table
GRB_name GRB110503A
GCN_number 12002
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12002 SUBJECT: GRB 110503A: Millimeter observation from SMA DATE: 11/05/04 22:25:52 GMT FROM: Antonio Deugarte at IAA-CSIC A. de Ugarte Postigo (DARK/NBI), G. Petitpas (SMA) and S. Martin (ESO) report on behalf of a larger collaboration: We have observed the afterglow of GRB 110503A (Stamatikos et al. GCNC11991) with the Submillimeter Array (SMA, Hawaii, U.S.A.). Observations were performed at 217GHz (1.4 mm) using 5 antennas under unstable weather conditions (optical depth at 225 GHz ~0.25, humidity ~50%). The GRB field was observed for 268 minutes (on-source), starting at 1:15 UT, with mean epoch on 4 May at 5:36 UT, 12.0 hours after the burst. We do not detect any significant flux at the position of the optical afterglow, imposing a 3-sigma detection limit of 5.1 mJy. [GCN OPS NOTE(05may11): Per author's request, the burst name in the Subject-line was corrected.]
GCN 12003 table
GRB_name GRB110503A
GCN_number 12003
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12003 SUBJECT: GRB 110503A: Centimeter observation from EVLA DATE: 11/05/04 23:24:57 GMT FROM: Dale A. Frail at NRAO Dale A. Frail (NRAO), Ashley Zauderer (Harvard), and Edo Berger (Harvard) report on behalf of a larger collaboration: We imaged a field toward the Swift burst GRB 110503A (GCN 11991,11995) with the EVLA starting on 2011 May 4.04 (i.e. 7.4 hrs after the burst). The EVLA observed at two frequencies (1 GHz bandwidth each) centered at 19.2 GHz and 24.5 GHz. In a preliminary data analysis we find a unresolved radio source within the UVOT error circle (GCN 12000) with a mean flux density of 160 +/- 15 uJy and a position (J2000) of RA=08:51:06.21, Dec.=+52 12 27.43, with a conservative error of +/-0.05 arcsec. We caution that these results are only preliminary. Further observations are planned.
GCN 12004 table
GRB_name GRB110503A
GCN_number 12004
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 12004 SUBJECT: GRB 110503A: R-band Detection DATE: 11/05/05 00:43:08 GMT FROM: Myungshin Im at Seoul Nat U Myungshin Im (CEOU/Seoul National Univ), Hyun-Il Sung (KASI), and Yuji Urata (NCU) on behalf of EAFON We observed GRB 110503A (Stamatikos et al., GCN 11991) in R-band with a 1.0-m telescope at Mt. Lemmon, Arizona. The observation started at 05-04-03:24:30 UT. We detect the afterglow with a magnitude at R ~ 20.28 +- 0.09 mag (mid-time of ~10.0 hrs after BAT alert) based on the photometry calibration star reported by Updike et al.(GCN 12001). Further analysis of the data and the follow-up observations of the object is ongoing. We thank the LOAO operator, I.-K. Baek for her assistance with the observation.
GCN 12005 table
GRB_name GRB110503A
GCN_number 12005
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12005 SUBJECT: GRB 110503A: optical observation in CrAO DATE: 11/05/05 01:01:22 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Pavlenko (CraO), A. Volnova (SAI MSU), A. Baklanov (CrAO), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report: We observed the field of GRB 110503A (Stamatikos et al. GCN 11991) with Shajn telescope of CrAO observatory on May. 3 starting (UT) 23:56. We took several frames with exposure of 60s in R-band. The afterglow (Stamatikos et al. GCN 11991) is well detected in each single frame. A preliminary photometry is based on the USNO B1.0 star 1421-0227752 (08:51:10.01 +52:11:04.75) assuming R=16.819 (Updike et al. GCN 12001): T0+ Filter, Exposure, mag. (mid, d) (s) 0.26433 R 60 19.00 +/- 0.08 0.27991 R 60 19.24 +/- 0.18 0.29450 R 60 19.22 +/- 0.08
GCN 12008 table
GRB_name GRB110503A
GCN_number 12008
Detection_method Konus-Wind Det
t_trigger 17:35:41.862 UTC
redshift 1.6100
Circular_text TITLE: GCN CIRCULAR NUMBER: 12008 SUBJECT: Konus-Wind observation of GRB 110503A DATE: 11/05/05 09:50:41 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The long GRB 110503A, (Swift/BAT trigger=452685: Stamatikos et al., GCN 11991; Sakamoto et.al, GCN 11995) triggered Konus-Wind at T0=63341.862s UT (17:35:41.862) The burst light curve consists of a single pulse with a total duration of ~12 s. The emission is seen up to ~4 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB110503_T63341/ As observed by Konus-Wind the burst had a fluence of (2.6 0.2)x10-5 erg/cm2, and a 64-ms peak flux, measured from T0+2.304 s, of (1.0 1)x10-5 erg/cm2/s (both in the 20 keV - 5 MeV energy range). The time-integrated spectrum of the burst (from T0 to T0+10.752 s) is best fitted in the 20 keV - 5 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -0.98 (-0.08, +0.09), the high energy photon index beta = -2.7 (-0.5, +0.2), the peak energy Ep = 219(-19, +20) keV, chi2 = 69.5/76 dof. The spectrum at the maximum count rate (measured from T0+1.792 s to T0+2.560 s) can be fitted in the 20 keV - 5 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -0.44 (-0.16, +0.19), the high energy photon index beta = -2.75 (-0.4, +0.3), the peak energy Ep = 211(-23, +25) keV, chi2 = 55.4/48 dof. Assuming the afterglow redshift z = 1.61 (de Ugarte Postigo et al., GCN 11993; D'Avanzo et al., GCN 11997) and a standard cosmology model with H_0 = 71 km/s/Mpc, Omega_M = 0.27, Omega_Lambda = 0.73, the isotropic energy release E_iso is (1.77 0.15)x10^53 erg, the peak luminosity L_iso_max is (1.83 0.18)x10^53 erg/s, and Ep_rest is 570 50 keV. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN 12009 table
GRB_name GRB110503A
GCN_number 12009
Detection_method Optical
ra 8.0000°
decl 52.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12009 SUBJECT: GRB 110503A optical observations DATE: 11/05/05 10:50:09 GMT FROM: AAVSO GRB Network at AAVSO Eric Broens (Mol, Belgium) and David Boyd (West Challow, Oxfordshire, UK) separately reported to the AAVSO International High Energy Network the following optical observations of GRB 110503A (GCN Circ. #11991, Stamatikos et al.): E. Broens (VVS WVS, Belgium) reports a detection of GRB 110503A at CR = 19.6 +/- 0.2 on 2011 May 3.921 UT (JD 2455685.421; midpoint of exposures), approximately 4.5 hours after the Swift trigger (GCN Circ. #11991, Stamatikos et al.). Broens obtained 41 frames of 60 seconds exposure in a clear filter using a 0.2-meter f7 SCT telescope with SBIG ST-7MXE CCD camera. An ensemble of three nearby SDSS stars were used as comparisons, with their R-band magnitudes calculated using the Jester et al. (2009, AJ 130, 873) relations. Comparison stars used were: SDSS J085110.53+521301.8 (R = 17.98) and SDSS J085110.02+521104.6 (R=17.20). The measured position of the GRB was: RA: 08 51 06.3 , Dec: +52 12 26.9 Prior to acquisition of the unfiltered frames, a total of thirty 60-second frames (1800s total) were taken with a Cousins R filter centered at 2011 May 3.895 approximately four hours after the burst. The filtered observations yielded an upper limit of Rc < 18.7. D. Boyd (West Challow, Oxfordshire, UK) reports V-band optical time series of GRB 110503A obtained using a 0.35-m SCT with a Starlight Express SXVR-H9 CCD camera. A total of 150 60-second frames were obtained, and these were stacked in groups of 30 to obtain five 1800-second integrations. The burst was detected in all frames. The resulting time-series are as follows: 2011 May 3.89920 UT V=19.40 +/- 0.04 2011 May 3.92022 UT V=19.57 +/- 0.04 2011 May 3.94123 UT V=19.71 +/- 0.04 2011 May 3.96225 UT V=19.74 +/- 0.05 2011 May 3.98326 UT V=19.96 +/- 0.05 Magnitudes were obtained using Astrometrica software using UCAC3 for positions and photometry; Boyd reports that magnitudes were obtained using varying ensembles of between 14 and 19 stars per stacked image. Boyd also notes that the coorindates of the GRB on all frames was RA: 08 51 06.19 , Dec: +52 12 27.3 (J2000) The AAVSO International High Energy Network was made possible through grants from the Charles Curry Foundation and NASA.
GCN 12010 table
GRB_name GRB110503A
GCN_number 12010
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12010 SUBJECT: GRB 110503A: Jet Break seen from TLS DATE: 11/05/06 00:36:27 GMT FROM: Alexander Kann at TLS Tautenburg D. A. Kann, S. Schmidl, B. Stecklum and C. Hoegner (TLS Tautenburg) report: Observations of GRB 110503A (M. Stamatikos et al., GCN 11991) and its afterglow are continuing at TLS Tautenburg (D. A. Kann et al., GCN 11996). In the first night, we observed for a total of 6 hours, with conditions becoming worse (increasing airmass and passing clouds). 43 detections in BVRIZ were secured. In the second night, observational conditions were challenging, with passing clouds and high airmass at the time observations could begin. We obtained 3 x 300 s in Rc, 3 x 450 s in V and only a single 450 s B observation. The afterglow is faintly detected in the Rc and V stacks as well as the B image. Using the comparison star of GCN 11996, as calibrated by A. Updike et al. (GCN 12001), we find: t (days after trigger) = 1.24878, Rc = 21.39 +/- 0.12 We re-observed the afterglow position in the third night under moderate conditions (low airmass, good seeing, but low transparency). We obtained 6 x 600 s in the Rc band. Even in the stack, the afterglow is only faintly detected. We find: t (days after trigger) = 2.14026, Rc = 22.63 +/- 0.28 Fitting our Rc band data shows a clear break, with alpha_1 = 0.83 +/- 0.03, alpha_2 = 2.3 +/- 0.6 (due to sparse data with large errors), t_b = 1.06 +/- 0.14 days. While both the post-break decay slope as well as the break time are insecure due to sparsity of the data, the data point at 2.14 days lies a complete magnitude under the extrapolation of the early decay, making the existence of a break itself secure. We propose this is the jet break of the afterglow. Deeper follow-up with telescopes of larger aperature is highly encouraged. This message may be cited.
GCN 12011 table
GRB_name GRB110503A
GCN_number 12011
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12011 SUBJECT: GRB 110503A: TAROT Calern observatory optical observations DATE: 11/05/06 16:56:18 GMT FROM: Alain Klotz at CESR-CNRS Klotz A. (CESR-OMP), Gendre B. (ASDC), Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report: We imaged the field of GRB 110503A detected by SWIFT (trigger 451901) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 1.9h after the GRB trigger (trigger occured during daytime). The elevation of the field decreased from 69 degrees above horizon and weather conditions were good. We detect the candidate couterpart mentioned by Stamatikos et al. 2011 (GCNC 11991) on co-added series of exposures. We used the reference star USNO B1.0 1421-0227752 (08:51:10.01 +52:11:04.75 J2000) described by Kann et al. 2011 (GCNC 11996) assuming R=16.819 (Updike et al. GCN 12001). start stop R 1.96h - 2.65h 18.42 +/- 0.15 2.71h - 3.99h 19.11 +/- 0.10 4.04h - 5.33h 19.51 +/- 0.12 5.38h - 7.43h 19.93 +/- 0.15 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. From 1.96h to 7.43h, the decay slope is alpha = 1.1.
GCN 12014 table
GRB_name GRB110503A
GCN_number 12014
Detection_method Optical
ra 8.0000°
decl 52.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12014 SUBJECT: GRB 110503A optical observation DATE: 11/05/16 15:06:57 GMT FROM: AAVSO GRB Network at AAVSO Andrea Tasselli (Lincoln, Lincolnshire, UK) reports to the AAVSO International High Energy Network the following optical observation of GRB 110503A (GCN Circ. #11991, Stamatikos et al.): A. Tasselli (Lincoln, Lincolnshire, UK) reports a detection of GRB 110503A at an unfiltered, Sloan r-derived magnitude of cr = 19.1 +/- 0.1 on 2011 May 05.9167 (JD 2455685.4167; midpoint of exposures), approximately 4 hours after the Swift trigger (GCN Circ. #11991, Stamatikos et al.). Tasselli obtained 30 unfiltered images of 120 seconds exposure for a total of 3600 seconds. Tasselli used a 0.2-meter Maksutov-Cassegrain (f/6.8) with a Starlight SXV-H9 CCD camera. Photometry of the OT was done using the Iris photometry package with an ensemble of six SDSS stars: SDSS J085118.11+521119.2, r=14.756; SDSS J085118.96+521055.4, r=15.565; SDSS J085110.02+521104.6, r=17.177; SDSS J085119.59+521406.2, r=13.871; SDSS J085131.83+521343.8, r=13.893; and SDSS J085110.53+521301.8, r=17.749. The position of the OT was measured using the Astrometrica package with 55 UCAC3 reference stars, and was found to be RA(J2000) = 08 51 06.2 Dec(J2000) = +52 12 30 in good agreement with other measurements. The AAVSO International High Energy Network was made possible through grants from the Charles Curry Foundation and NASA.