GRB140502A

This page lists all entries on GRB140502A in GRBweb

Summary Fermi GBM IPN Swift GCN 16202 GCN 16203 GCN 16206 GCN 16207 GCN 16208 GCN 16209 GCN 16210 GCN 16221

Summary table
Variable Value Source
GRB_name_Fermi GRB140502354
T0 8:30:18.571 UTC Fermi_GBM
ra 319.1882° Swift
decl 48.9702° Swift
pos_error 2.59e-04° Swift
T90 20.096 s Fermi_GBM
T90_error 0.916 s Fermi_GBM
T90_start 8:30:18.571 UTC Fermi_GBM
fluence 2.11e-06 erg/cm² Fermi_GBM
fluence_error 3.55e-08 erg/cm² Fermi_GBM
T100 20.096 s
GBM_located False
mjd 56779.3543816088 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB140502354
trigger_name bn140502354
ra 319.1871°
decl 48.9700°
pos_error 5.31e+00°
datum 2014-05-02
t_trigger 8:30:20.107 UTC
T90 20.096 s
T90_error 0.916 s
T90_start 8:30:18.571 UTC
fluence 2.11e-06 erg/cm²
fluence_error 3.55e-08 erg/cm²
flux_1024 1.63e+00 erg/cm²/s
flux_1024_error 1.91e-01 erg/cm²/s
flux_1024_time 4.48e-01 erg/cm²/s
flux_64 3.33e+00 erg/cm²/s
flux_64_error 1.04e+00 erg/cm²/s
IPN table
GRB_name GRB140502A
ra 319.1542°
decl 49.0167°
pos_error 5.00e-02°
Swift table
GRB_name GRB140502A
t_trigger 8:30:20 UTC
ra 319.1882°
decl 48.9702°
pos_error 2.59e-04°
T90 16.9 s
fluence 6.70e-07 erg/cm²
GCN 16202 table
GRB_name GRB140502A
GCN_number 16202
Detection_method Swift Det
t_trigger 8:30:20 UTC
ra 319.1550°
decl 49.0180°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16202 SUBJECT: GRB 140502A: Swift detection of a burst DATE: 14/05/02 08:44:00 GMT FROM: Scott Barthelmy at NASA/GSFC C. A. Swenson (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU) and P. A. Evans (U Leicester) report on behalf of the Swift Team: At 08:30:20 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140502A (trigger=597841). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 319.155, +49.018 which is RA(J2000) = 21h 16m 37s Dec(J2000) = +49d 01' 04" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 25 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 08:31:31.3 UT, 70.8 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 319.18744, 48.97012 which is equivalent to: RA(J2000) = 21h 16m 44.99s Dec(J2000) = +48d 58' 12.4" with an uncertainty of 4.0 arcseconds (radius, 90% containment). This location is 188 arcseconds from the BAT onboard position, outside 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 consistent with the Galactic value of 9.47 x 10^21 cm^-2 (Willingale et al. 2013). UVOT took a finding chart exposure of 150 seconds with the White filter starting 74 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 none of the XRT error circle. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the large, but uncertain extinction expected. Burst Advocate for this burst is C. A. Swenson (cswenson AT astro.psu.edu). 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 16203 table
GRB_name GRB140502A
GCN_number 16203
Detection_method Fermi GBM Det
t_trigger 8:30:20.110 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 16203 SUBJECT: GRB 140502A: Fermi GBM observation DATE: 14/05/02 13:30:31 GMT FROM: Hoi-Fung Yu at MPE Hoi-Fung Yu (MPE) reports on behalf of the Fermi GBM Team: "At 08:30:20.11 UT on 02 May 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140502A (trigger 420712223 / 140502354), which was also detected by Swift/BAT and XRT (Swenson et al. 2014, GCN 16202). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 64 degrees. The GBM light curve consists of a single pulse with a duration (T90) of about 20 s (50-300 keV). The time-averaged spectrum from T0-2.048 s to T0+6.144 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.7 +/- 0.2 and the cutoff energy, parameterized as Epeak, is 298 +/- 71 keV. The event fluence (10-1000 keV) in this time interval is (1.6 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.448 s in the 10-1000 keV band is 1.6 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 16206 table
GRB_name GRB140502A
GCN_number 16206
Detection_method Swift-XRT Det
ra 319.1882°
decl 48.9702°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16206 SUBJECT: GRB 140502A: Enhanced Swift-XRT position DATE: 14/05/02 19:51:41 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 1615 s of XRT Photon Counting mode data and 3 UVOT images for GRB 140502A, 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 = 319.18818, +48.97021 which is equivalent to: RA (J2000): 21h 16m 45.16s Dec (J2000): +48d 58' 12.7" with an uncertainty of 2.0 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 16207 table
GRB_name GRB140502A
GCN_number 16207
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 16207 SUBJECT: GRB 140502A: Swift-XRT refined Analysis DATE: 14/05/02 20:44:04 GMT FROM: Phil Evans at U of Leicester D.N. Burrows (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), B. Sbarufatti (INAF-OAB/PSU), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), J.A. Kennea (PSU), V. Mangano (PSU) and C.A. Swenson report on behalf of the Swift-XRT team: We have analysed 6.3 ks of XRT data for GRB 140502A (Swenson et al. GCN Circ. 16202), from 84 s to 17.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 16206). The light curve can be modelled with a power-law decay with a decay index of alpha=0.85 (+0.23, -0.17). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.7 (+0.8, -0.6). The best-fitting absorption column is 2.2 (+1.4, -1.1) x 10^22 cm^-2, in excess of the Galactic value of 9.5 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 7.0 x 10^-11 (1.3 x 10^-10) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 2.2 (+1.4, -1.1) x 10^22 cm^-2 Galactic foreground: 9.5 x 10^21 cm^-2 Excess significance: 1.8 sigma Photon index: 1.7 (+0.8, -0.6) If the light curve continues to decay with a power-law decay index of 0.85, the count rate at T+24 hours will be 7.5 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.3 x 10^-14 (9.5 x 10^-14) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00597841. This circular is an official product of the Swift-XRT team.
GCN 16208 table
GRB_name GRB140502A
GCN_number 16208
Detection_method Swift-BAT Det
ra 319.1720°
decl 48.9750°
Circular_text TITLE: GCN CIRCULAR NUMBER: 16208 SUBJECT: GRB 140502A: Swift-BAT refined analysis DATE: 14/05/02 22:17:48 GMT FROM: Scott Barthelmy at NASA/GSFC A. Y. Lien (NASA/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), T. Sakamoto (AGU), C. A. Swenson (PSU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 140502A (trigger #597841) (Swenson, et al., GCN Circ. 16202). The BAT ground-calculated position is RA, Dec = 319.172, 48.975 deg, which is RA(J2000) = 21h 16m 41.3s Dec(J2000) = +48d 58' 28.2" with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 99%. The mask-weighted light curve shows a FRED-shaped peak starting at ~T-3 sec, peaking at ~T+2 sec, and ending at ~T+20 sec. T90 (15-350 keV) is 16.9 +- 1.9 sec (estimated error including systematics). The time-averaged spectrum from T-1.66 to T+17.39 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.22 +- 0.13. The fluence in the 15-150 keV band is 6.7 +- 0.5 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+1.44 sec in the 15-150 keV band is 0.9 +- 0.1 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/597841/BA/
GCN 16209 table
GRB_name GRB140502A
GCN_number 16209
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 16209 SUBJECT: GRB 140502A: MITSuME Okayama upper limits DATE: 14/05/03 04:19:32 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of MITSuME collaboration: We observed the field of GRB 140502A (Swenson et al., GCNC 16202) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. The observation started on 2014-05-02 16:48:47 UT (~8.3 h after the burst). We did not find any new point source within the enhanced XRT circle (Goad et al., GCNC 16206) in all the three bands. Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration. #T0+[day] MID-UT T-EXP[sec] g' Rc Ic ----------------------------------------------------- 0.38783 17:48:49 6180.0 >19.5 >19.2 >18.5 ----------------------------------------------------- T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 16210 table
GRB_name GRB140502A
GCN_number 16210
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 16210 SUBJECT: GRB 140502A: Swift/UVOT Upper Limits DATE: 14/05/03 11:43:15 GMT FROM: Samantha Oates at MSSL S. R. Oates (IAA-CSIC,UCL-MSSL) and C. A. Swenson (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 140502A 75 s after the BAT trigger (Swenson et al., GCN Circ. 16202). Two bright USNO-B1 sources lie close to the XRT location, with R magnitudes of 13.48 and 13.61, lie within 3 and 9 arcseconds, respectively of the XRT position (Goad et al., GCN Circ. 16206). Neither of these sources are observed to vary significantly over the duration of the initial UVOT observations. Ppreliminary 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 75 225 147 >16.0 u_FC 287 537 246 >16.3 white 75 5702 525 >16.0 v 616 6113 432 >15.0 b 543 11919 337 >16.0 u 287 11811 1347 >16.3 w1 666 17270 1642 >17.9 m2 4681 16734 1262 >20.0 w2 593 5908 432 >18.9 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 2.97 in the direction of the burst (Schlegel et al. 1998).
GCN 16221 table
GRB_name GRB140502A
GCN_number 16221
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 16221 SUBJECT: GRB 140502A: ISON-NM early optical limit DATE: 14/05/07 20:16:19 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), A. Volnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed of the field of Swift GRB GRB 140502A with 0.4-m telescope of ISON-NM observatory starting on May, 02 (UT) 08:31:32, i.e. 72 s after BAT trigger (Swenson et al., GCN 16202). We took series of unfiltered images of 30 s - 60 s exposures. A bright star (USNO-B1.0 1389-0392112) already mentioned (Oates et al., GCN 16210) lies within enhanced XRT error circle (Goad et al., GCN 16206). We investigate variability of a possible OT in presence in near vicinity of the bright star. The upper limit of possible variation of the OT is 16.6m within any of 60 s interval of our observations between (UT) 08:31:32 and 09:24:25 which can be considered as an upper limit on the OT associated with GRB 140502A. Formal photometry and limiting magnitude of point-like source in the observed field is following UT start t-T0 Exp. Filter OT UL(3 sigma) (mid.,days) (s) 08:31:32 0.00383 10*30 None n/d 18.8 and based on nearby USNO-B1.0 stars, R2 magnitudes.