GRB100905A

This page lists all entries on GRB100905A in GRBweb

Summary IPN Swift GCN 11214 GCN 11215 GCN 11216 GCN 11218 GCN 11219 GCN 11220 GCN 11222 GCN 11223 GCN 11224 GCN 11225 GCN 11237

Summary table
Variable Value Source
T0 15:08:14 UTC GCN_circulars,Swift Det
ra 31.5502° Swift
decl 14.9295° Swift
pos_error 1.94e-04° Swift
T90 3.4 s Swift
T90_start 15:08:14 UTC Swift
fluence 1.70e-07 erg/cm² Swift
redshift 7.9000 IPN
T100 3.4 s
GBM_located False
mjd 55444.63071759259 GCN_circulars,Swift Det
IPN table
GRB_name GRB100905A
ra 31.5292°
decl 14.9333°
pos_error 5.00e-02°
redshift 7.9000
Swift table
GRB_name GRB100905A
t_trigger 15:08:14 UTC
ra 31.5502°
decl 14.9295°
pos_error 1.94e-04°
T90 3.4 s
fluence 1.70e-07 erg/cm²
GCN 11214 table
GRB_name GRB100905A
GCN_number 11214
Detection_method Swift Det
t_trigger 15:08:14 UTC
ra 31.5300°
decl 14.9320°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11214 SUBJECT: GRB 100905A: Swift detection of a burst DATE: 10/09/05 15:24:02 GMT FROM: David Palmer at LANL F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), J. M. Gelbord (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), A. Rowlinson (U Leicester), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), E. Troja (NASA/GSFC/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 15:08:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100905A (trigger=433442). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 31.530, +14.932 which is RA(J2000) = 02h 06m 07s Dec(J2000) = +14d 55' 54" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 6 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~1 sec after the trigger. The XRT began observing the field at 15:09:29.9 UT, 75.2 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 31.5505, 14.9300 which is equivalent to: RA(J2000) = 02h 06m 12.12s Dec(J2000) = +14d 55' 47.9" with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 71 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 consistent with the Galactic value of 5.35 x 10^20 cm^-2 (Kalberla et al. 2005). UVOT took a finding chart exposure of 150 seconds with the White filter starting 77 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 3-sigma upper limit is typically 19.3 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 0.06. Burst Advocate for this burst is F. E. Marshall (marshall 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 11215 table
GRB_name GRB100905A
GCN_number 11215
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11215 SUBJECT: GRB 100905A: Faulkes Telescope North observations DATE: 10/09/05 15:57:12 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), I. A. Steele, C. G. Mundell (LJMU), A. Gomboc (U. Ljubljana) report on behalf of a large collaboration: The Faulkes Telescope North automatically began observing Swift GRB 100905A (Marshall et al. GCN Circ. 11214) on September 05, 15:10:32 UT, 138 s from the GRB trigger time. Within the XRT error circle we do not find any source down to the following limiting magnitudes: Mid Time from Exposure Filter Lim. Mag. GRB (s) (s) ------------------------------------------------------- 179 3x10 R > 19.8 604 120 R > 20.0 839 100 i' > 19.0 ------------------------------------------------------- Magnitudes are calibrated against nearby USNOB-1 stars R2 and I values. Observations stopped soon due to twilight.
GCN 11216 table
GRB_name GRB100905A
GCN_number 11216
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 11216 SUBJECT: GRB 100905A: MASTER Prompt Optical Observations DATE: 10/09/05 17:43:04 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs K.Ivanov, O.Chuvalaev, V.Poleschuk, E.Konstantinov, V.Lenok, O.Gres, S.Yazev, N.M.Budnev, Irkutsk State University E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located at Tunka was pointed to the Swift GRB 100905A (Marshall et al. GCN Circ. 11214) 33 sec after Notice time (55 s after GRB trigger time) in two polarizations bands. There is no optical transient at XRT position (Marshall et al. GCN Circ. 11214). Following data has been received: start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd? Band -------------------------------------------------------------------------- 15:09:10 15:09:20 10 16.5 55.0 N Polariz 15:09:39 19:09:59 20 17.1 84.0 N Polariz 15:10:45 15:11:15 30 17.3 150.0 N Polariz 15:11:35 15:12:15 40 17.5 200.0 N Polariz -------------------------------------------------------------------------- The observations and data reductions is continued. The message may be cited.
GCN 11218 table
GRB_name GRB100905A
GCN_number 11218
Detection_method Swift-BAT Det
ra 31.5420°
decl 14.9190°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11218 SUBJECT: GRB 100905A: Swift-BAT refined analysis DATE: 10/09/05 21:39:43 GMT FROM: Scott Barthelmy at NASA/GSFC 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/UMD), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-61 to T+242 sec from the recent telemetry downlink, we report further analysis of BAT GRB 100905A (trigger #433442) (Marshall, et al., GCN Circ. 11214). The BAT ground-calculated position is RA, Dec = 31.542, 14.919 deg, which is RA(J2000) = 02h 06m 10.0s Dec(J2000) = +14d 55' 08.2" with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows a single peak starting at ~T-1.7 sec, peaking at ~T+0.5 sec, and ending at ~T+3 sec. T90 (15-350 keV) is 3.4 +- 0.5 sec (estimated error including systematics). The time-averaged spectrum from T-1.6 to T+2.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.09 +- 0.19. The fluence in the 15-150 keV band is 1.7 +- 0.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.03 sec in the 15-150 keV band is 0.6 +- 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/433442/BA/
GCN 11219 table
GRB_name GRB100905A
GCN_number 11219
Detection_method Swift-XRT Det
ra 31.5502°
decl 14.9294°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11219 SUBJECT: GRB 100905A: Enhanced Swift-XRT position DATE: 10/09/05 21:51:09 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 1956 s of XRT Photon Counting mode data and 2 UVOT images for GRB 100905A, 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 = 31.55023, +14.92941 which is equivalent to: RA (J2000): 02h 06m 12.06s Dec (J2000): +14d 55' 45.9" with an uncertainty of 1.6 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 11220 table
GRB_name GRB100905A
GCN_number 11220
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11220 SUBJECT: GRB100905A: 1.5m OSN upper limit DATE: 10/09/06 01:16:38 GMT FROM: Antonio Deugarte at IAA-CSIC A. Sota (IAA-CSIC), A. de Ugarte Postigo (DARK/NBI), A.J. Castro-Tirado (IAA-CSIC) report on behalf of a larger collaboration: "We have observed the field of GRB100905A (Marshall et al. GCNC 11214) using the 1.5m telescope of the Observatorio de Sierra Nevada, in Granada (Spain). In a 7x300s combined I-band frame, with mean epoch September 5.9792 UT (8.36 hours after the burst onset), we do not detect any new source within the enhanced XRT position (Evans et al. GCNC 11219) down to a 3-sigma limiting magnitude of 22.8. USNO-B1.0 has been used as reference catalogue."
GCN 11222 table
GRB_name GRB100905A
GCN_number 11222
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 11222 SUBJECT: GRB 100905A: UKIRT zJHK Observation DATE: 10/09/06 04:55:03 GMT FROM: Myungshin Im at Seoul Nat U Myungshin Im, Changsu Choi, Hyunsung Jun, Eugene Kang (CEOU/Seoul National University), Y. Urata (NCU), P. Choi (Pomona College), T. Sakamoto (NASA/GSFC), and N. Gehrels (NASA/GSFC) on behalf of a larger collaboration We observed GRB 100905A (Marshall et al. GCN 11214) in z, J, H, and K filters using UKIRT. The observation started at Sept. 05, 15:22 UT or roughly 17 minutes after the BAT alert, until the sunrise. The reduced images with non-optimal calibration frames show a "possible" very faint source within the XRT error circle (Evans et al. GCN 11219) whose significance is only 2-3 sigma in each image (2-sigma limit, J=19.8, H=19.0, and K=18.7 mag). The faint smudge show up in all zJHK filter images, suggesting this could be an afterglow, but we do not exclude the possibility that this is just a spurious detection. Further analysis of the UKIRT data is ongoing.
GCN 11223 table
GRB_name GRB100905A
GCN_number 11223
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11223 SUBJECT: GRB 100905A: Swift-XRT refined analysis. DATE: 10/09/06 08:08:17 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift-XRT team: We have analysed 7.1 ks of XRT data for GRB 100905A (Marshall et al. GCN Circ. 11214), from 78 s to 13.6 ks after the BAT trigger. The data comprise 71 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 11219). The light curve shows some initial flaring activity, with the flares peaking at around 290, 320 and 400 s after the trigger. The flares peak an order of magnitude brighter than the underlying emission, which can be modelled with a single power-law, with a decay index of alpha=0.86 (+/-0.06). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 3.0 (+/-0.3). The best-fitting absorption column is 1.9 (+0.6, -0.5) x 10^21 cm^-2, in excess of the Galactic value of 5.4 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.97 (+0.12, -0.18) and a best-fitting absorption column of 8.4 (+4.1, -2.8) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.9 x 10^-11 (4.8 x 10^-11) erg cm^-2 count^-1. If the light curve continues to decay with a power-law decay index of 0.86, the count rate at T+24 hours will be 2.7 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/00433442. This circular is an official product of the Swift-XRT team.
GCN 11224 table
GRB_name GRB100905A
GCN_number 11224
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 11224 SUBJECT: GRB100905A: MITSuME Okayama optical upper limits DATE: 10/09/06 08:57:02 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 100905A (Marshall et al., GCN 11214) 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 2010-09-05 15:31:18 UT (~23 min after the burst). We did not find any new point source within the enhanced XRT error circle (Evans et al., GCNC 11219) in all the three bands. Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration. T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.09641 17:27:05 10380.0 >20.9 >20.6 >19.7 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 11225 table
GRB_name GRB100905A
GCN_number 11225
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 11225 SUBJECT: GRB100905A: Optical upper limits at IAO DATE: 10/09/06 08:58:15 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, 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 100905A (Marshall et al., GCN 11214) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory. The observation started on 2010-09-05 18:56:36 UT (~0.16 day after the burst). We did not find any new point source within the enhanced XRT error circle (Evans et al., GCNC 11219) in all the three bands. Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration. T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.16300 19:02:58 1440.0 >21.1 >21.4 >19.5 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 11237 table
GRB_name GRB100905A
GCN_number 11237
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11237 SUBJECT: GRB 100905A: Swift/UVOT Upper Limits DATE: 10/09/06 19:08:45 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel (PSU) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift/UVOT team. The Swift/UVOT began settled observations of the field of GRB 100905A 77s after the BAT trigger (Marshall et al., GCN Circ. 11214). Data summed from the first and second orbits do not reveal a source at the enhanced position of the X-ray afterglow (Evans et al., GCN Circ. 11219). The 3-sigma upper limits for the finding chart (fc) and summed exposures are reported below: FILTER T_start(s) T_stop Exposure Mag/3UL ======================================================== white fc 78 228 147 >20.77 white 78 2055 450 >21.29 V 619 1933 155 >19.01 B 545 2031 155 >19.81 u fc 290 540 245 >20.08 u 290 2006 381 >20.17 uvw1 668 1982 155 >19.53 uvm2 5654 7290 393 >20.19 uvw2 5245 12865 1278 >21.26 ======================================================= The above magnitudes are not corrected for the Galactic extinction corresponding to a reddening of E_{B-V} = 0.06 (Schlegel et al., 1998, ApJS, 500, 525). The photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).