GRB110709A

This page lists all entries on GRB110709A in GRBweb

Summary Fermi GBM IPN Swift Fermi LAT GCN 12118 GCN 12119 GCN 12120 GCN 12123 GCN 12125 GCN 12127 GCN 12133 GCN 12134 GCN 12138 GCN 12139 GCN 12141 GCN 12146 GCN 12148 GCN 12152 GCN 12156

Summary table
Variable Value Source
GRB_name_Fermi GRB110709642
T0 15:24:27 UTC Fermi_LAT
ra 238.8914° Swift
decl 40.9242° Swift
pos_error 1.81e-04° Swift
T90 43.201 s Fermi_GBM
T90_error 0.405 s Fermi_GBM
T90_start 15:24:28.456 UTC Fermi_GBM
fluence 3.69e-05 erg/cm² Fermi_GBM
fluence_error 6.19e-08 erg/cm² Fermi_GBM
T100 46.7 s
GBM_located False
mjd 55751.64197916666 Fermi_LAT
Fermi GBM table
GRB_name_Fermi GRB110709642
trigger_name bn110709642
ra 238.9000°
decl 40.9000°
pos_error 2.57e+00°
datum 2011-07-09
t_trigger 15:24:27.368 UTC
T90 43.201 s
T90_error 0.405 s
T90_start 15:24:28.456 UTC
fluence 3.69e-05 erg/cm²
fluence_error 6.19e-08 erg/cm²
flux_1024 1.11e+01 erg/cm²/s
flux_1024_error 4.82e-01 erg/cm²/s
flux_1024_time 3.61e+01 erg/cm²/s
flux_64 1.51e+01 erg/cm²/s
flux_64_error 2.01e+00 erg/cm²/s
IPN table
GRB_name GRB110709A
ra 238.8958°
decl 40.9000°
pos_error 5.00e-02°
Swift table
GRB_name GRB110709A
t_trigger 15:24:29 UTC
ra 238.8914°
decl 40.9242°
pos_error 1.81e-04°
T90 44.7 s
fluence 1.00e-05 erg/cm²
Fermi LAT table
GRB_name_Fermi GRB110709642
GRB_name GRB110709A
MET 331917869.0
datum 2011-07-09
t_trigger 15:24:27 UTC
ra 238.8914°
decl 40.9243°
pos_error 4.17e-04°
GCN 12118 table
GRB_name GRB110709A
GCN_number 12118
Detection_method Swift Det
t_trigger 15:24:29 UTC
ra 238.8950°
decl 40.8980°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12118 SUBJECT: GRB 110709A: Swift detection of a burst DATE: 11/07/09 16:23:57 GMT FROM: Scott Barthelmy at NASA/GSFC S. T. Holland (CRESST/USRA/GSFC), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), V. D'Elia (ASDC), B. Gendre (ASDC), C. Gronwall (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (NASA/GSFC), D. M. Palmer (LANL), P. Romano (INAF-IASFPA), M. H. Siegel (PSU) and E. Troja (NASA/GSFC/ORAU) report on behalf of the Swift Team: At 15:24:29 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 110709A (trigger=456939). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 238.895, +40.898, which is RA(J2000) = 15h 55m 35s Dec(J2000) = +40d 53' 51" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows 8 roughly equal bright peaks with a total duration of about 50 sec. The peak count rate was ~12,000 counts/sec (15-350 keV), at ~18 sec after the trigger. The XRT began observing the field at 15:25:34.7 UT, 65.6 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 238.8931, +40.9232 which is equivalent to: RA(J2000) = 15h 55m 34.34s Dec(J2000) = +40d 55' 23.5" with an uncertainty of 4.9 arcseconds (radius, 90% containment). This location is 92 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 73 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 0.02. Burst Advocate for this burst is S. T. Holland (Stephen.T.Holland 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 12119 table
GRB_name GRB110709A
GCN_number 12119
Detection_method Swift-XRT Other
ra 238.8911°
decl 40.9244°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12119 SUBJECT: GRB 110709A: Prompt enhanced Swift-XRT position DATE: 11/07/09 16:26:49 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Using promptly downlinked XRT event data for GRB 110709A, we find an enhanced XRT position of the afterglow: RA, Dec: 238.8911, 40.9244 which is equivalent to: RA (J2000) = 15 55 33.86 Dec (J2000) = +40 55 28.0 with an uncertainty of 2.0 arc sec (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/456939. Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177). This circular is an official product of the Swift-XRT team.
GCN 12120 table
GRB_name GRB110709A
GCN_number 12120
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 12120 SUBJECT: GRB 110709A: MASTER-NET optical observations DATE: 11/07/09 16:45:29 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev,E.Konstantinov, Irkutsk State University E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov,A.Sankovich Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka(Siberia) was pointed to the GRB110709.64 29 sec s after notice time and 54 sec after GRB time at 2011-07-09 15:25:23.161 UT. On our first (10s exposure) set we haven't found optical transient within SWIFT error-box (Holland et al., GCN 110709A). The 3-sigma upper limit has been about 16.0 mag (V band + polarizator) The message may be cited.
GCN 12123 table
GRB_name GRB110709A
GCN_number 12123
Detection_method Swift-XRT Det
ra 238.8914°
decl 40.9243°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12123 SUBJECT: GRB 110709A: Enhanced Swift-XRT position DATE: 11/07/09 22:12:44 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 3951 s of XRT Photon Counting mode data and 7 UVOT images for GRB 110709A, 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 = 238.89144, +40.92427 which is equivalent to: RA (J2000): 15h 55m 33.95s Dec (J2000): +40d 55' 27.4" with an uncertainty of 1.5 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 12125 table
GRB_name GRB110709A
GCN_number 12125
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12125 SUBJECT: GRB 110709A : Xinglong TNT upper limit DATE: 11/07/09 23:40:40 GMT FROM: L.P. Xin at NAOC L.P. Xin, M,Zhai, Y.L. Qiu, J.Y. Wei, J. Wang, J.S. Deng, C. Wu, X. H. Han on behalf of EAFON report: We began to observe GRB110709A (Holland et al. GCN 12118) with Xinglong TNT telescope at 15:30:49 (UT), 6 min after the burst. A series of R-band images were obtained. After combining 10*20s R-band images, no any new source was found within the errorbox of X-ray counterpart,down to 3 sigma upper limit of R~19.1 mag at the mean time of 7.5 min after the burst. This message may be cited. For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/
GCN 12127 table
GRB_name GRB110709A
GCN_number 12127
Detection_method Swift-BAT Det
ra 238.8950°
decl 40.9180°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12127 SUBJECT: GRB 110709A: Swift-BAT refined analysis DATE: 11/07/10 00:18:48 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), S. T. Holland (CRESST/USRA/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-239 to T+733 sec from recent telemetry downlinks, we report further analysis of BAT GRB 110709A (trigger #456939) (Holland, et al., GCN Circ. 12118). The BAT ground-calculated position is RA, Dec = 238.895, 40.918 deg, which is RA(J2000) = 15h 55m 34.8s Dec(J2000) = +40d 55' 06.4" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 91%. The mask-weighted light curve shows at least 8 peaks starting at T-5 sec, with the brightest peak at ~T+34 sec, and returning to background at ~T+100 sec. T90 (15-350 keV) is 44.7 +- 1.0 sec (estimated error including systematics). The time-averaged spectrum from T-4.3 to T+65.5 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.24 +- 0.03. The fluence in the 15-150 keV band is 1.0 +- 0.02 x 10^-05 erg/cm2. The 1-sec peak photon flux measured from T+34.31 sec in the 15-150 keV band is 6.2 +- 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/456939/BA/
GCN 12133 table
GRB_name GRB110709A
GCN_number 12133
Detection_method Fermi GBM Det
t_trigger 15:24:27.370 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 12133 SUBJECT: GRB 110709A: Fermi GBM observation DATE: 11/07/10 03:12:50 GMT FROM: Valerie Connaughton at UAH/NSSTC V. Connaughton (UAH) reports on behalf of the Fermi GBM Team: "At 15:24:27.37 UT on 09 July 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 110709A (trigger 331917869 / 110709642), which was also detected by the Swift/BAT (Holland et al. 2011, GCN 12118) and the Swift/XRT (Evans et al. 2011, GCN 12119). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight at trigger time was 54 degrees. Approximately 6 - 200 s from trigger time, the Fermi spacecraft executed an automatic maneuver in response to a command from GBM, in order to place the burst closer to the LAT boresight, and observed this position for the following 2.5 hours, subject to Earth limb constraints. The GBM light curve shows several bright peaks from trigger time to 50-s post-trigger, with a duration (t90) of 43.5 s (50-300 keV). The time-averaged spectrum from T0-4.096 s to T0+62.5 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.16 +/- 0.02 and the cutoff energy, parametrized as Epeak, is 533 +/- 37 keV. The event fluence (10-1000 keV) in this time interval is (4.43 +/- 0.07)E-5 erg/cm^2. The 64 ms peak photon flux measured starting from T0+25.28 s in the 10-1000 keV band is 15.4 +/- 1.7 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 12134 table
GRB_name GRB110709A
GCN_number 12134
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 12134 SUBJECT: GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m DATE: 11/07/10 04:51:05 GMT FROM: Juan Carlos Tello at IAA-CSIC J.C.Tello, J. Gorosabel, A. Castro-Tirado, M. Fernandez (IAA-CSIC Granada, Spain) and N. Huelamo (CAB-CSIC Madrid, Spain) reports on behalf of a larger collaboration: We observed GRB110709A detected by Swift/BAT (Holland et al. 2011, GCN 12118) with CAHA 1.23m and OSN 1.5m telescopes. Centro Astronmico Hispano Alemn (CAHA) 1.23m's observation in R filter lasted from July 9th 20:35 to 21:42 UT (e.g. 5.18-6.29 hours after trigger). At 8x420 sec co-added frames centred on XRT position (Evans et al. 2011, GCN 12119) we do not detect any new source down to limiting magnitude R=22.7, calibrated against USNO B1.0. The I band frames from 1.5m Observatorio de Sierra Nevada (OSN) were taken on July 9th. On co-added I band frames, taken between 20:44 and 22:03 UT, with total exposure 4200 sec, we report limiting magnitude I=20.4 (calibrated against USNO B1.0). On V frames with total duration 1200 sec, acquired between 21:24 and 21:42 UT, we do not see any new source down to limiting magnitude V=21.6 (Calibrated against GSC 2.3). This message may be cited.
GCN 12138 table
GRB_name GRB110709A
GCN_number 12138
Detection_method Konus-Wind Det
t_trigger 15:24:30.576 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 12138 SUBJECT: Konus-Wind observation of GRB 110709A DATE: 11/07/10 13:35:02 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 110709A (Swift-BAT trigger #456939: Holland et al., GCN 12118; Sakamoto et al., GCN 12127) triggered Konus-Wind at T0=55470.576s UT (15:24:30.062) The burst light curve consists of several partially overlapped pulses, a total duration of the burst ~60 s. The emission is seen up to ~5 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB110709_T55470/ As observed by Konus-Wind the burst had a fluence of (3.7 0.3)x10-5 erg/cm2, and a 256-ms peak flux, measured from T0+12.544 s, of (4.1 0.4)x10-6 erg/cm2/s (both in the 20 keV - 5 MeV energy range). The time-integrated spectrum of the burst (measured from T0 to T0+48.896 s) is best fitted in the 20 keV - 5 MeV range by a power law with exponential cutoff model, for which alpha = -1.03 (-0.07, +0.07), and Ep = 356(-34, +42) keV, chi2 = 72.6/76 dof. The spectrum at the maximum count rate (measured from T0+7.963 to T0+16.128 s) is best fitted in the 20 keV - 5 MeV range by a power law with exponential cutoff model, for which alpha = -0.72 (-0.12, +0.13), and Ep = 523(-68, +87) keV, chi2 = 72.4/76 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN 12139 table
GRB_name GRB110709A
GCN_number 12139
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 12139 SUBJECT: GRB110709A: MITSuME Ishigakijima Optical upper limits DATE: 11/07/10 14:07:27 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (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 110709A (Holland et al., GCN 12118) 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 15:27:30 UT (~3 min after the burst). We did not find any new point source within the Enhanced XRT circle (Osborne, et al., GCN 12123) 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 ------------------------------------------------------ 0.00487 15:31:30 420.0 >19.9 >19.8 >18.7 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]
GCN 12141 table
GRB_name GRB110709A
GCN_number 12141
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12141 SUBJECT: GRB 110709A: Swift-XRT refined Analysis DATE: 11/07/10 17:11:25 GMT FROM: Giulia Stratta at ASDC G. Stratta (ASDC), V. D'Elia (ASDC) and S. T. Holland (CRESST/USRA/GSFC) report on behalf of the Swift-XRT team: We have analysed 9.6 ks of XRT data for GRB 110709A (Holland et al. GCN Circ. 12118), from 71 s to 19.3 ks after the BAT trigger. The data comprise 565 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 12119). The late-time light curve (from T0+5.2 ks) can be modelled with a power-law decay with a decay index of alpha=1.72 (+/-0.10). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.21 (+0.09, -0.08). The best-fitting absorption column is 7.5 (+0.6, -0.5) x 10^21 cm^-2, in excess of the Galactic value of 1.5 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.07 (+/-0.11) and a best-fitting absorption column of 7.3 (+/-0.7) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.0 x 10^-11 (1.0 x 10^-10) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 7.3 (+/-0.7) x 10^21 cm^-2 Galactic foreground: 1.5 x 10^20 cm^-2 Excess significance: 17.8 sigma Photon index: 2.07 (+/-0.11) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00456939. This circular is an official product of the Swift-XRT team.
GCN 12146 table
GRB_name GRB110709A
GCN_number 12146
Detection_method Swift-XRT Other
ra 238.8911°
decl 40.9244°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12146 SUBJECT: GRB 110709A: Konkoly observations DATE: 11/07/11 00:52:33 GMT FROM: Janos Kelemen at Konkoly Obs/Hungary J. Kelemen,(Konkoly Obs.) on behalf of the GRB OT observing program at the Konkoly Observatory. We observed the field of GRB 110709A (trigger=456939) S. T. Holland et al. (GCN 12118) using the enhanced Swift-XRT position provided by P. A. Evans. (GCN 12119) with a 60/90 cm Schmidt telescope located at the Mountain Station of the Konkoly Observatory. We coadded 6 red sensitive CCD images without filter with 300 sec exposure time each. On the coadded frame we checked the position RA (J2000) = 15:55:33.86 Dec (J2000) = +40:55:28.0 provided by J. P. Osborne et al. (GCN 12123). We found a faint marginaly visible source at the position RA (J2000) = 15:55:33.96 Dec (J2000) = +40:55:27.7 within the error circle of the astrometricaly corrected X-ray position. Based on nearby UCAC-3 stars the brightness of this object in the R band is 21.4 +/- 0.2 magnitude. Time from the trigger magnitude Band ---------------------------------------- 27374 sec 21.4 +/- 0.2 R
GCN 12148 table
GRB_name GRB110709A
GCN_number 12148
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12148 SUBJECT: GRB 110709A: Swift/UVOT Upper Limits DATE: 11/07/11 18:54:50 GMT FROM: Stephen Holland at USRA/NASA/GSFC/SSC S. T. Holland (CRESST/USRA/GSFC) reports on behalf of the Swift/UVOT team: The Swift/UVOT observed the field of GRB 110709A starting 56 s after the BAT trigger (Holland et al., 2011, GCNC 12118). Settled observations started at 74 s. We do not detect an optical afterglow at the UVOT-enhanced XRT position (Osborne, et al., 2011, GCNC 12123) in any of the UVOT filters. Preliminary 3-sigma upper limits for detecting a source in the finding charts and in the co-added images, are Filter TSTART TSTOP ESPOSURE Mag --------------------------------------------------- white (FC) 74 224 147 >21.7 u (FC) 287 536 246 >21.0 white (FC) 865 1014 147 >21.8 --------------------------------------------------- v 616 7409 549 >20.9 b 542 19,323 2148 >22.5 u 287 18,560 2337 >22.2 uvw1 666 17,646 1383 >21.7 uvm2 5978 7614 393 >20.7 uvw2 591 7204 490 >21.2 white 74 13,546 1538 >23.1 --------------------------------------------------- The quoted magnitudes and upper limits have not been corrected for the large, but uncertain, Galactic extinction along the line of sight to this burst (E_{B-V} = 0.02 mag, Schlegel et al. 1998, ApJS, 500, 525).
GCN 12152 table
GRB_name GRB110709A
GCN_number 12152
Detection_method Suzaku WAM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 12152 SUBJECT: GRB 110709A: Suzaku WAM observation of the prompt emission DATE: 11/07/12 09:02:58 GMT FROM: Yoshitaka Hanabata at Hiroshima U Y. Hanabata, T. Uehara, T. Takahashi, M. Mizuno, M. Ohno, Y. Fukazawa (Hiroshima U.), T. Yasuda, Y. Terada, M. Tashiro, W. Iwakiri, K. Takahara (Saitama U.), S. Sugita (Nagoya U.), K. Yamaoka (Aoyama Gakuin U.), M. Kokubun, T. Takahashi (ISAS/JAXA), Y. E. Nakagawa (Waseda U.), N. Ohmori, M. Akiyama, M. Yamauchi (Univ. of Miyazaki), Y. Urata, P. Tsai, C-J. Chuang (NCU), K. Nakazawa, K. Makishima (Univ. of Tokyo), on behalf of the Suzaku WAM team, report: The bright long GRB110709A (Swift/BAT trigger #456939, GCN 12118; Holland et al.) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 15:24:27.951 UT (=T0). The observed light curve shows multiple peaks starting at T0 s, ending at T0+45 s, with a duration (T90) of about 41.5 seconds. The fluence in 100 - 1000 keV was 2.02 (-0.26, +0.10) x 10^-5 erg/cm^2. The 1-s peak flux measured from T0+7 s was 4.10 (-0.96, +0.10) photons/cm^2/s in the same range. Preliminary result shows that the time-averaged spectrum from T0 s to T0+45 s is well fitted by a power-law with exponential cutoff model: dN/dE ~ E^{-alpha} * exp(-(2-alpha)*E/Epeak) with alpha 1.37 (-0.61, +0.49), and Epeak 431 (-113, +173) keV (chi^2/d.o.f. = 18.0/12). We also shows the results with the same spectrum fitted by a GRB Band model fixing beta of 2.5, the low-energy photon index alpha: 1.34 (-0.49, +0.74) and the peak energy Epeak: 407 (-96, +158) keV (chi^2/d.o.f = 17.4/12). All the quoted errors are at statistical 90% confidence level. The light curves for this burst are available at: http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html
GCN 12156 table
GRB_name GRB110709A
GCN_number 12156
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12156 SUBJECT: GRB 110709A / EVLA upper limits DATE: 11/07/14 06:10:34 GMT FROM: Ashley Zauderer at CfA A. Zauderer, E. Berger, and W. Fong (Harvard) report on behalf of a larger collaboration: We observed the position of GRB 110709A (GCN #12118) with the EVLA at 5.8 GHz and 22 GHz starting on 2011 July 10.12 UT (~12 hours after the burst). In ~20 min integration time on source at each frequency, no radio source is detected within the XRT error circle (GCN #12123) to a 3-sigma limit of 60 microJy/bm (5.8 GHz) and 104 microJy/bm (22 GHz). We acknowledge the EVLA staff for their support of these observations.