GRB100802A

This page lists all entries on GRB100802A in GRBweb

Summary Fermi GBM IPN Swift GCN 11031 GCN 11032 GCN 11033 GCN 11034 GCN 11035 GCN 11036 GCN 11038 GCN 11039 GCN 11040 GCN 11041 GCN 11042 GCN 11046 GCN 11061 GCN 11082

Summary table
Variable Value Source
GRB_name_Fermi GRB100802240
T0 5:45:33.884 UTC Fermi_GBM
ra 2.4686° Swift
decl 47.7553° Swift
pos_error 1.01e-04° Swift
T90 28.672 s Fermi_GBM
T90_error 3.167 s Fermi_GBM
T90_start 5:45:33.884 UTC Fermi_GBM
fluence 1.20e-06 erg/cm² Fermi_GBM
fluence_error 3.23e-08 erg/cm² Fermi_GBM
T100 489.116 s
GBM_located False
mjd 55410.23997550926 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB100802240
trigger_name bn100802240
ra 2.4675°
decl 47.7544°
pos_error 5.11e+00°
datum 2010-08-02
t_trigger 5:45:35.676 UTC
T90 28.672 s
T90_error 3.167 s
T90_start 5:45:33.884 UTC
fluence 1.20e-06 erg/cm²
fluence_error 3.23e-08 erg/cm²
flux_1024 1.38e+00 erg/cm²/s
flux_1024_error 1.68e-01 erg/cm²/s
flux_1024_time 3.20e-01 erg/cm²/s
flux_64 2.91e+00 erg/cm²/s
flux_64_error 9.42e-01 erg/cm²/s
IPN table
GRB_name GRB100802A
ra 2.4583°
decl 47.7500°
pos_error 5.00e-02°
Swift table
GRB_name GRB100802A
t_trigger 5:45:36 UTC
ra 2.4686°
decl 47.7553°
pos_error 1.01e-04°
T90 487.0 s
fluence 3.60e-06 erg/cm²
GCN 11031 table
GRB_name GRB100802A
GCN_number 11031
Detection_method Swift Det
t_trigger 5:45:36 UTC
ra 2.4570°
decl 47.7520°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11031 SUBJECT: GRB 100802A: Swift detection of a burst DATE: 10/08/02 05:56:25 GMT FROM: David Palmer at LANL E. Troja (NASA/GSFC/ORAU), J. M. Gelbord (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), O. M. Littlejohns (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), A. Rowlinson (U Leicester), T. Sakamoto (NASA/UMBC), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC), R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 05:45:36 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100802A (trigger=430603). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 2.457, +47.752 which is RA(J2000) = 00h 09m 50s Dec(J2000) = +47d 45' 06" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single FRED peak structure with a duration of about 30 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 05:46:55.8 UT, 79.7 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 2.4673, +47.7545 which is equivalent to: RA(J2000) = 00h 09m 52.15s Dec(J2000) = +47d 45' 16.2" with an uncertainty of 5.1 arcseconds (radius, 90% containment). This location is 26 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. The initial flux in the 2.5 s image was 2.09e-09 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 88 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. 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 expected extinction corresponding to E(B-V) of 0.12. Burst Advocate for this burst is E. Troja (eleonora.troja 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 11032 table
GRB_name GRB100802A
GCN_number 11032
Detection_method Swift-UVOT Det
ra 2.4686°
decl 47.7553°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11032 SUBJECT: GRB 100802A: Possible Swift/UVOT Detection of Optical Afterglow DATE: 10/08/02 06:21:36 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel (PSU) and E. Troya (NASA/GSFC/ORAU) report on behalf of the Swift/UVOT team: UVOT took a finding chart exposure of 250 seconds with the U filter starting 301 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at RA(J2000) = 00:09:52.47 = 2.46862 DEC(J2000) = +47:45:19.1 = 47.75531 with a 90%-confidence error radius of about 0.78 arc sec. This position is 4.3 arc sec. from the center of the XRT error circle. The estimated magnitude is 19.56 with a 1-sigma error of about 0.21. No correction has been made for the expected extinction corresponding to E(B-V) of 0.12.
GCN 11033 table
GRB_name GRB100802A
GCN_number 11033
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 11033 SUBJECT: GRB 100802A: ROTSE-III Optical Limits DATE: 10/08/02 06:29:52 GMT FROM: Shashi Bhushan Pandey at ROTSE S. B. Pandey (U Mich), H. Flewelling (IfA/Hawaii), W. Zheng (U Mich), report on behalf of the ROTSE collaboration: ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 100802A (Swift trigger 430603; Troja, E., GCN 11031), producing images beginning 9.1 s after the GCN notice time. An automated response took the first image at 05:46:10.1 UT, 27.9 s after the burst, and during the gamma-ray emission, under fair conditions. We took 10 5-sec, 10 20-sec and 10 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Imaging is on going. Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma Swift/BAT error circle or the XRT error circle, for both single images and coadding into sets of 10. Individual images have limiting magnitudes ranging from 15.3-17.6; we set the following specific limits. start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd? -------------------------------------------------------------------- 05:46:10.1 05:46:15.1 5 15.3 27.9 N 05:47:30.9 05:52:12.0 281 18.2 108.7 Y
GCN 11034 table
GRB_name GRB100802A
GCN_number 11034
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 11034 SUBJECT: GRB 100802A: Liverpool Telescope observations DATE: 10/08/02 07:11:05 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), A. Gomboc (U. Ljubljana), report on behalf of a large collaboration: On 2010 August 02 at 05:51:53 UT the 2-m Liverpool Telescope automatically began observing the Swift GRB 100802A (Troja et al., GCN Circ. 11031) using the r' filter, corresponding to 6.3 minutes after the burst trigger time. We do not detect any uncatalogued source within the XRT error circle. We do not detect the possible afterglow candidate reported by UVOT either (Siegel and Troja, GCN Circ. 11032) with the following upper limit: Mid time from Total Exp Filter Magnitude trigger (s) (s) ------------------------------------------------- 530 6x10 r' > 18.8 ------------------------------------------------- Magnitude has been calibrated from nearby USNOB1.0 R2 stars.
GCN 11035 table
GRB_name GRB100802A
GCN_number 11035
Detection_method Swift-BAT Det
ra 2.4820°
decl 47.7520°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11035 SUBJECT: GRB 100802A: Swift-BAT refined analysis DATE: 10/08/02 12:53:03 GMT FROM: Scott Barthelmy at NASA/GSFC W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU), E. Troja (NASA/GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (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 100802A (trigger #430603) (Troja, et al., GCN Circ. 11031). The BAT ground-calculated position is RA, Dec = 2.482, 47.752 deg, which is RA(J2000) = 00h 09m 55.6s Dec(J2000) = +47d 45' 05.5" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 84%. The mask-weighted light curve shows a FRED peak starting at ~T-7 sec and peaking at ~T+1sec. There is a second peak on the tail of the first at ~T+90 sec. There is also a long peak starting around T+250, peaking at ~T+450 sec, and ending at ~T+700 sec. T90 (15-350 keV) is 487 +- 30 sec (estimated error including systematics). The time-averaged spectrum from T-3.3 to T+531.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.85 +- 0.10. The fluence in the 15-150 keV band is 3.6 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.08 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/430603/BA/
GCN 11036 table
GRB_name GRB100802A
GCN_number 11036
Detection_method Swift-XRT Det
ra 2.4685°
decl 47.7548°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11036 SUBJECT: GRB 100802A: Enhanced Swift-XRT position DATE: 10/08/02 13:49:26 GMT FROM: Phil Evans at U of Leicester P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team. Using 794 s of XRT Photon Counting mode data and 2 UVOT images for GRB 100802A, 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 = 2.46849, +47.75479 which is equivalent to: RA (J2000): 00h 09m 52.44s Dec (J2000): +47d 45' 17.3" 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 11038 table
GRB_name GRB100802A
GCN_number 11038
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11038 SUBJECT: GRB 100802A: Swift/UVOT Possible Optical Afterglow DATE: 10/08/02 15:59:42 GMT FROM: Alice Breeveld at MSSL-UCL A. Breeveld (MSSL/UCL) and E. Troja (NASA/GSFC/ORAU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 100802A 89 s after the BAT trigger (Troja et al., GCN Circ. 11031). Using the data from the most recent telemetry, there is a tentative detection of an optical afterglow at the position given by Siegel et al., GCN Circ. 11032, in the early white and u exposures. Preliminary detections and later 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposures and subsequent summed exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 89 238 147 20.7 0.24 u_FC 301 551 246 19.57 0.22 white 581 5566 327 21.85 0.48 (2.4 sigma sig) v 632 5977 432 >20.6 b 557 6754 388 >21.2 u 706 6593 412 >20.92 w1 682 6388 432 >20.9 m2 657 6183 432 >20.6 w2 608 5772 432 >21.0 The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.12 in the direction of the burst (Schlegel et al. 1998).
GCN 11039 table
GRB_name GRB100802A
GCN_number 11039
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11039 SUBJECT: GRB 100802A: XRT refined analysis DATE: 10/08/02 17:37:31 GMT FROM: Antonia Rowlinson at U.of Leicester A. Rowlinson (U. Leicester) and E. Troja (NASA/GSFC/ORAU) report on behalf of the Swift-XRT team: We have analysed 10 ks of XRT data for GRB 100802A (Troja et al. GCN Circ. 11031), from 69 s to 24.0 ks after the BAT trigger. The data comprise 804 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 Evans et al. (GCN. Circ 11036). The light curve can be modelled with an initial power-law decay with an index of alpha=1.64 (+0.03, -0.03) and a flare peaking at 515 s which is consistent with a BAT peak (Baumgartner et al. GCN Circ. 11035). At T+11500 s, the light curve breaks to a decay with alpha=0.06 (+0.26, -0.21). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.88 (+/-0.03). The best-fitting absorption column is 1.93 (+/-0.09) x 10^21 cm^-2, in excess of the Galactic value of 9.7 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 4.0 x 10^-11 (5.4 x 10^-11) erg cm^-2 count^-1. The PC mode spectrum can be fitted with an absorbed power-law with a photon spectral index of 2.21 (+0.23, -0.33). The best-fitting absorption column is 1.39 (+0.82, -0.42) x 10^21 cm^-2, in excess of the Galactic value. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.5 x 10^-11 (5.2 x 10^-11) erg cm^-2 count^-1. If the light curve continues to decay with a power-law decay index of 0.06, the count rate at T+24 hours will be 1.6 x 10^-2 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.6 x 10^-13 (8.3 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/00430603. This circular is an official product of the Swift-XRT team.
GCN 11040 table
GRB_name GRB100802A
GCN_number 11040
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 11040 SUBJECT: GRB 100802A: P60 Observations DATE: 10/08/02 18:23:13 GMT FROM: S. Bradley Cenko at Caltech S. B. Cenko (UC Berkeley) reports on behalf of a larger collaboration: We have imaged the field of GRB100802A (Troja et al., GCN 11031) with the automated Palomar 60 inch telescope. Observations were taken in the Sloan r', i', and z' filters beginning at 05:51 UT on 2 August (~ 6 minutes after the BAT trigger). In a co-added r'-band image (mid-point 06:02 UT, or ~ 17 minutes after the burst trigger), we detect a marginal source at the location of the candidate UVOT afterglow (Siegel and Troja, GCN 11032; Breeveld and Troja, GCN 11038). Calibrating with respect to several USNO-B1 catalog objects, we measure R = 21.3 +/- 0.3 mag. No object is detected at this location in a co-added i'-band image (mid-point 06:04 UT, or ~ 18.5 minutes after the burst trigger) to a limiting magnitude of I > 20.6. The values quoted above are not corrected for Galactic extinction.
GCN 11041 table
GRB_name GRB100802A
GCN_number 11041
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 11041 SUBJECT: GRB100802A: MITSuME optical upper limits DATE: 10/08/03 05:46:22 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 the MITSuME collaboration: We observed the field of GRB 100802A (Troja et al., GCNC 11031) 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 2010-08-02 11:43:26 UT (~6 h after the burst). We did not find any new point source within the XRT error circle and the enhanced XRT error circle (Evans et al., GCNC 11036) in all the three bands. Also, we could not detect the previously reported afterglow (Siegel and Troya, GCN 11032). Three sigma upper limits of the OT are listed below. We used GSC 2.3 catalog for flux calibration. T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.29658 12:52:41 9480.0 >19.9 >19.8 >19.3 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 11042 table
GRB_name GRB100802A
GCN_number 11042
Detection_method Optical
ra 2.4682°
decl 47.7552°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11042 SUBJECT: GRB 100802A: NOT optical observation DATE: 10/08/03 10:09:43 GMT FROM: Dong Xu at DARK,NBI D. Xu (Weizmann Inst.), D. Malesani (DARK/NBI), P. Jakobsson (Univ. of Iceland), P. A. Wilson, R. Nilsson (NOT), report on behalf of a larger collaboration: We have imaged the field of GRB100802A (Troja et al., GCN #11031) with the Nordic Optical Telescope equipped with ALFOSC. Observations started at 02:49 UT, 3rd August (~21.06 hrs after the BAT trigger) and four 900 s frames in the R band were obtained. We detect an optical source localised at RA(J2000) = 00:09:52.38 Dec(J2000) = +47:45:18.8 with an error radius of 0.4". This position is 0.96" +/- 0.85" S-W of the UVOT position (Siegel & Troja, GCN #11032). We therefore identify this source as the afterglow of GRB100802A. A finding chart is visible at the following URL: http://www.astro.ku.dk/~malesani/GRB/100802A/GRB100802A_NOT.jpg. Based on the USNO-B1 catalog (R1 magnitudes), we find R=22.9+/-0.3 at a mean epoch of 21.6 hr after the BAT trigger. Compared with the P60 detection (Cenko, GCN #11040), our measurement confirms a clear fading, and implies a rather shallow decay of the afterglow light curve with alpha = 0.34 +/- 0.08 assuming an unbroken power-law decay F(t) propto t^-alpha. This might suggest some contribution from an underlying host galaxy.
GCN 11046 table
GRB_name GRB100802A
GCN_number 11046
Detection_method Fermi GBM Det
t_trigger 5:45:35.680 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 11046 SUBJECT: GRB 100802A: Fermi GBM observation DATE: 10/08/04 08:54:53 GMT FROM: Elisabetta Bissaldi at MPE Elisabetta Bissaldi (MPE) reports on behalf of the Fermi GBM Team: "At 05:45:35.68 UT on 2 August 2010, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 100802A (trigger 302420737 / 100802240), which was also detected by the Swift-BAT (Troja et al. 2010, GCN 11031). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 76 degrees. The GBM light curve consists of an initial peak followed by a softer tail with a duration (T90) of about 100 s (50-300 keV). The time-averaged spectrum from T0 to T0+40 s is adequately fit by a power law function with an exponential high energy cutoff. The power law index is -1.17 (+0.21/-0.25) and the cutoff energy, parameterized as Epeak, is 149 (+41/-96) keV (Castor C-STAT 669 for 479 d.o.f.). The event fluence (10-1000 keV) in this time interval is (2.24 +/- 0.28)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+62 s in the 10-1000 keV band is 3.2 +/- 0.6 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 11061 table
GRB_name GRB100802A
GCN_number 11061
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11061 SUBJECT: GRB 100802A: WIYN observations DATE: 10/08/05 16:13:08 GMT FROM: Adria C. Updike at Clemson U Adria C. Updike, Ginger Bryngelson, Dieter H. Hartmann (Clemson University) and Peter A. Milne (Steward Observatory) report: We observed the field of GRB 100802A (Troja et al., GCN 11031) with the 3.5m WIYN telescope at KPNO equipped with WHIRC on August 3, 2010 beginning 26 hours and 13 minutes after the trigger and continuing for 26 minutes in the K band under good conditions. We do not detect the afterglow (Siegel & Troja, GCN 11032; Cenko, GCN 11040) or any source within the enhanced XRT position (Evans et al., GCN 11036) to limiting magnitude of K > 18.8 upon comparison to the 2MASS catalog and field stars. No further observations are planned.
GCN 11082 table
GRB_name GRB100802A
GCN_number 11082
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11082 SUBJECT: GRB 100802A: further NOT observation DATE: 10/08/12 10:37:13 GMT FROM: Dong Xu at DARK,NBI Nis B. Andreasen, Maria Cavallius, Louise Dyregaard Nielsen, Christopher Groenbech, Simone J. Jakobsen, Jonatan Selsing, Lasse Oedegaard (Niels Bohr Inst.), Johan P.U. Fynbo, Daniele Malesani (DARK/NBI), Dong Xu (Weizmann Inst.), and Pall Jakobsson (Univ. Iceland), report on behalf of a larger collaboration: We observed the field of GRB 100802A (Troja et al., GCN 11031, Siegel & Troja, GCN 11032) with the NOT equipped with ALFOSC. Observations were carried out with mean time Aug 11.10 UT (212.7 hr after the GRB). The object seen in our early-time NOT image (Xu et al., GCN 11042) is barely detected in the new stacked image, and has decayed by 1.3 +/- 0.4 mag between the two epochs. We note that the NOT object is slightly offset (by ~1.1" W) with respect to the UVOT position (GCN 11032; also confirmed by P60 imaging; B. Cenko, priv. comm.). Coupled to the slow decay, this may indicate the presence of an underlying constant source of light, which could be the host galaxy or a foreground, unrelated object. An image showing the two epochs is available at the following URL: http://www.astro.ku.dk/~malesani/GRB/100802A/GRB100802A_epoch2.jpg Given the relative brightness of the underlying source (R ~ 23.7), we encourage further photometric and spectroscopic observations. [GCN OPS NOTE (12aug10): Per author's request, MC was added to the author list.]