GRB110625A

This page lists all entries on GRB110625A in GRBweb

Summary Fermi GBM IPN Swift Fermi LAT GCN 12088 GCN 12089 GCN 12091 GCN 12092 GCN 12093 GCN 12094 GCN 12095 GCN 12096 GCN 12097 GCN 12098 GCN 12099 GCN 12100 GCN 12102 GCN 12113

Summary table
Variable Value Source
GRB_name_Fermi GRB110625881
T0 21:08:18.236 UTC Fermi_GBM
ra 286.7327° Fermi_LAT
decl 6.7553° Fermi_LAT
pos_error 5.83e-04° Fermi_LAT
T90 26.881 s Fermi_GBM
T90_error 0.572 s Fermi_GBM
T90_start 21:08:22.076 UTC Fermi_GBM
fluence 6.55e-05 erg/cm² Fermi_GBM
fluence_error 1.01e-07 erg/cm² Fermi_GBM
T100 54.264 s
GBM_located False
mjd 55737.88076662037 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB110625881
trigger_name bn110625881
ra 286.7300°
decl 6.7550°
pos_error 2.47e+00°
datum 2011-06-25
t_trigger 21:08:18.236 UTC
T90 26.881 s
T90_error 0.572 s
T90_start 21:08:22.076 UTC
fluence 6.55e-05 erg/cm²
fluence_error 1.01e-07 erg/cm²
flux_1024 7.70e+01 erg/cm²/s
flux_1024_error 6.74e-01 erg/cm²/s
flux_1024_time 2.39e+01 erg/cm²/s
flux_64 8.43e+01 erg/cm²/s
flux_64_error 2.79e+00 erg/cm²/s
IPN table
GRB_name GRB110625A
ra 286.7500°
decl 6.7500°
pos_error 5.00e-02°
Swift table
GRB_name GRB110625A
t_trigger 21:08:28 UTC
ra 286.7510°
decl 6.7550°
pos_error 1.01e-02°
T90 44.5 s
fluence 2.80e-05 erg/cm²
Fermi LAT table
GRB_name_Fermi GRB110625881
GRB_name GRB110625A
MET 330728910.43
datum 2011-06-25
t_trigger 21:08:28.430 UTC
ra 286.7327°
decl 6.7553°
pos_error 5.83e-04°
GCN 12088 table
GRB_name GRB110625A
GCN_number 12088
Detection_method Swift Det
t_trigger 21:08:28 UTC
ra 286.7500°
decl 6.7530°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12088 SUBJECT: GRB 110625A: Swift detection of a burst DATE: 11/06/25 21:25:19 GMT FROM: Scott Barthelmy at NASA/GSFC K. L. Page (U Leicester), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC), V. D'Elia (ASDC), S. T. Holland (CRESST/USRA/GSFC), F. E. Marshall (NASA/GSFC), C. Pagani (U Leicester), D. M. Palmer (LANL), P. Romano (INAF-IASFPA), C. J. Saxton (UCL-MSSL), M. H. Siegel (PSU), M. C. Stroh (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team: At 21:08:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 110625A (trigger=456073). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 286.750, +6.753, which is RA(J2000) = 19h 07m 00s Dec(J2000) = +06d 45' 10" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows several bright peaks with a total duration of about 60 sec. The peak count rate was ~20,000 counts/sec (15-350 keV), at ~13 sec after the trigger. The XRT began observing the field at 21:10:48.8 UT, 140.3 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 286.73189, 6.75386 which is equivalent to: RA(J2000) = 19h 06m 55.65s Dec(J2000) = +06d 45' 13.9" with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 64 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 does not constrain the column density. The initial flux in the 2.5 s image was 1.72e-09 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 250 seconds with the U filter starting 205 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 19.2 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 18.0 mag. No correction has been made for the large, but uncertain extinction expected. Burst Advocate for this burst is K. L. Page (kpa AT star.le.ac.uk). 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 12089 table
GRB_name GRB110625A
GCN_number 12089
Detection_method Swift-BAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 12089 SUBJECT: GRB 110625A: ROTSE-III Optical Limits DATE: 11/06/25 22:24:00 GMT FROM: Weikang Zheng at U.of Michigan W. Zheng (U Mich) and W. Rujopakarn (Steward), report on behalf of the ROTSE collaboration: ROTSE-IIId, located at the Turkish National Observatory at Bakirlitepe, Turkey, responded to GRB 110625A (Swift trigger 456073; Page et al., GCN 12088), producing images beginning 6.8 s after the GCN notice time. An automated response took the first image at 21:08:48.8 UT, 20.3 s after the burst, and during the gamma-ray emission, under fair conditions. We took 10 5-sec, 10 20-sec and 110 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 15.5-16.6; we set the following specific limits. start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd? -------------------------------------------------------------------- 21:08:48.8 21:10:56.3 127 16.9 20.3 Y 21:11:05.2 21:15:42.8 277 17.5 156.7 Y 21:15:51.7 21:20:29.5 277 17.5 443.2 Y
GCN 12091 table
GRB_name GRB110625A
GCN_number 12091
Detection_method Swift-BAT Det
ra 286.7510°
decl 6.7550°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12091 SUBJECT: GRB 110625A: Swift-BAT refined analysis DATE: 11/06/26 06:32:26 GMT FROM: Scott Barthelmy at NASA/GSFC D. M. Palmer (LANL), 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), K. L. Page (U Leicester), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+602 sec from the recent telemetry downlink, we report further analysis of BAT GRB 110625A (trigger #456073) (Page, et al., GCN Circ. 12088). The BAT ground-calculated position is RA, Dec = 286.751, 6.755 deg, which is RA(J2000) = 19h 07m 00.3s Dec(J2000) = +06d 45' 17.8" with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 5%. The mask-weighted light curve shows a series of peaks starting at ~T-12 sec, with major peaks at ~T-5, ~T+2, ~T+13 and ~T+18, followed by a long tail ending at ~T+350 sec. T90 (15-350 keV) is 44.5 +- 10.1 sec (estimated error including systematics). The time-averaged spectrum from T-6.2 to T+140.3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.44 +- 0.04. The fluence in the 15-150 keV band is 2.8 +- 0.1 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+13.74 sec in the 15-150 keV band is 49.5 +- 2.4 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/456073/BA/
GCN 12092 table
GRB_name GRB110625A
GCN_number 12092
Detection_method Swift-XRT Other
ra 286.7327°
decl 6.7553°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12092 SUBJECT: GRB 110625A: Swift-XRT refined Analysis DATE: 11/06/26 11:56:14 GMT FROM: Kim Page at U.of Leicester K. L. Page (U Leicester) reports on behalf of the Swift-XRT team: We have analysed 4.1 ks of XRT data for GRB 110625A (Page et al. GCN Circ. 12088), from 129 s to 34.9 ks after the BAT trigger. The data comprise 96 s in Windowed Timing (WT) mode (the first 10 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The best available XRT position (using the promptly downlinked event data, the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue) is RA, Dec = 286.7327, 6.7553 which is equivalent to: RA (J2000): 19 06 55.85 Dec(J2000): +06 45 19.2 with an uncertainty of 2.1 arcsec (radius, 90% confidence). The light curve can be modelled with an initial power-law decay with an index of alpha=1.12 (+0.04, -0.03), followed by a break at T+18.7 ks to an alpha of 2.7 (+7.3, -1.2). There are insufficient data to constrain this steeper decay well at this time. A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.5 (+/-0.4). The best-fitting absorption column is 6.3 (+1.1, -1.0) x 10^22 cm^-2, in excess of the Galactic value of 1.4 x 10^22 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.8 (+/-0.4) and a best-fitting absorption column of 5.9 (+1.3, -1.1) x 10^22 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 1.1 x 10^-10 (3.2 x 10^-10) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 5.9 (+1.3, -1.1) x 10^22 cm^-2 Galactic foreground: 1.4 x 10^22 cm^-2 Excess significance: 8.7 sigma Photon index: 1.8 (+/-0.4) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00456073. This circular is an official product of the Swift-XRT team.
GCN 12093 table
GRB_name GRB110625A
GCN_number 12093
Detection_method Konus-Wind Det
t_trigger 21:08:25.088 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 12093 SUBJECT: Konus-Wind observation of GRB 110625A DATE: 11/06/26 13:56:21 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 bright GRB 110625A (Swift-BAT trigger #456073: Page et al., GCN 12088; Palmer et al., GCN 12091) triggered Konus-Wind at T0=76105.088s UT (21:08:25.088) The burst light curve consists of several multi-peaked pulses, a total duration of the burst is ~60 s. The emission is seen up to ~8 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB110625_T76105/ As observed by Konus-Wind the burst had a fluence of (6.1 0.6)x10-5 erg/cm2, and a 64-ms peak flux, measured from T0+20.992 s, of (1.5 0.2)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum of the burst (from T0 to T0+58.880 s) is best fitted in the 20 keV - 10 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -1.05 (-0.08, +0.08), the high energy photon index beta = -2.7 (-0.5, +0.2), the peak energy Ep = 190(-14, +17) keV, chi2 = 79.7/87 dof. The spectrum at the maximum count rate (measured from T0+20.992 to T0+21.504 s) is best fitted in the 20 keV - 10 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -0.8 (-0.2, +0.2), the high energy photon index beta = -2.5 (-0.5, +0.2), the peak energy Ep = 168(-24, +40) keV, chi2 = 45.2/46 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN 12094 table
GRB_name GRB110625A
GCN_number 12094
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12094 SUBJECT: GRB 110625A: Konkoly observations DATE: 11/06/26 14:50:30 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 110625A (trigger=456073) using the Swift-XRT position provided by K.L. Page et al. (GCN 12088) with a 60/90 cm Schmidt telescope located at the Mountain Station of the Konkoly Observatory. We coadded 4 CCD images with 300 sec exposure time each. After checking the coadded frame we did not find any OT brighter than 21.5 mag in R the band within the XRT error circle. The photometry based on UCAC-3 stars around the field. Time from the trigger magnitude Band ---------------------------------------- 5829 sec 21.5 +/- 0.2 R Upper Limit!
GCN 12095 table
GRB_name GRB110625A
GCN_number 12095
Detection_method Other
ra 286.7325°
decl 6.7553°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12095 SUBJECT: GRB 110625A: NIR Source DATE: 11/06/26 15:06:17 GMT FROM: Myungshin Im at Seoul Nat U Myungshin Im, Ji Hoon Kim, Dohyeong Kim, and Duho Kim (CEOU/Seoul National University), on behalf of a larger collaboration We observed GRB 110625A (Page et al. GCN 12088) in zYHK filters with UKIRT starting at 2011 June 26,10:08:47 UT. Within the enhanced XRT error circle (Page et al. GCN 12092), we detect a NIR source in all the filters, whose coordinate is RA=19:06:55.8, Dec=06:45:19.2 with positional error of ~0.5". K-band magnitude is found to be about 17.5 mag, calibrated against a 2MASS star at (19:06:55.65, 06:45:16.2) The variability of the source is being examined with additional data.
GCN 12096 table
GRB_name GRB110625A
GCN_number 12096
Detection_method GROND
ra 286.7329°
decl 6.7554°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12096 SUBJECT: GRB 110625A: GROND detection of a source inside the XRT error circle DATE: 11/06/26 16:13:01 GMT FROM: Jochen Greiner at MPI R. Filgas (MPE Garching), A. Rossi, A.D. Kann (both TLS Tautenburg), A. Rau and J. Greiner (both MPE Garching) report on behalf of the GROND team: We observed the field of GRB 110625A (Swift trigger 456073; Page et al., GCN #12088) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPI/ESO telescope at La Silla Observatory (Chile). Observations started at 02:24 UT on June 26, 5.3 hours after the GRB trigger, continued until 03:11 UT, and were obtained at high airmass. A second epoch was obtained starting at 05:35, 8.46 hours after the burst, and finished at 07:06 UT. Inside the refined XRT error circle (Page et al., GCN #12092) we found a single source at RA,DEC (J2000)= 19:06:55.89, +06:45:19.5 (+-0.3"), consistent with the source reported by Im at al., GCN #12095. Over the course of 5 hrs, no variability is detected in relative photometry measured against a field star at RA,DEC(J200)=19:06:56.99,+06:45:20.4 with z_AB = 19.4 mag. We measure the following magnitudes (all in AB) from the first 1440s and 1200s of exposure in g'r'i'z' and JHK, respectively: g' > 24.3 r' = 24.1 +/- 0.2 i' = 22.6 +/- 0.1 z' = 21.5 +/- 0.1 J = 21.1 +/- 0.7 H > 18.6 K > 17.8 The photometry were derived by calibration against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V) ~ 10.5 mag in the direction of the burst (Schlegel et al. 1998). Given the lack of variability and a color much bluer than would be expected according to the strong foreground extinction, we suggest that this optical/near-IR source is likely a Galactic object unrelated to GRB 110625A.
GCN 12097 table
GRB_name GRB110625A
GCN_number 12097
Detection_method Fermi LAT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 12097 SUBJECT: GRB 110625A: Fermi LAT detection DATE: 11/06/26 19:52:11 GMT FROM: Thomas P.H. Tam at Nat.Tsing Hua U. P.H.T. Tam and A.K.H. Kong (NTHU) report: We report on the detection of >100 MeV gamma-ray emission from the direction of GRB 110625A (Swift trigger 456073; Page et al., GCN #12088) using the Fermi Large Area Telescope (LAT). The GRB position was outside the LAT field of view (i.e., >75 deg with respect to the LAT boresight) at the burst onset (T0; 2011-06-25 UT 21:08:28; GCN #12088). However, prominent emission up to several GeV was detected from the GRB direction around T0+200s to T0+500s, during which the light curve seems to resemble a double-peak structure. Using the data obtained from the above period, we localized the LAT emission at RA, DEC (J2000 deg) = 286.6, 6.9, with a statistical error of ~0.3 deg (68% CL), which is compatible with the refined Swift/XRT position (Page et al., GCN #12092). A preliminary spectral fit gives a photon spectral index of around -3 at energies above 100 MeV.
GCN 12098 table
GRB_name GRB110625A
GCN_number 12098
Detection_method Other
ra 286.7328°
decl 6.7405°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12098 SUBJECT: GRB 110625A: 1.23m CAHA I-band observations DATE: 11/06/26 23:50:14 GMT FROM: Javier Gorosabel at IAA-CSIC J. Gorosabel (IAA-CSIC), V. Terron (IAA-CSIC), P. Ferrero (IAC), M. Jelinek (IAA-CSIC), P. Kubanek (IAA-CSIC & U. Valencia), M. Fernandez (IAA-CSIC), report on behalf of a larger collaboration: "We observed the field of GRB 110625A (Page et al., GCN 12088) with the 1.23m telescope of Calar Alto observatory. We obtained 45x60s I-band images on June 25.88457--25.93027 UT (i.e, starting 5.32 min after the trigger). In the co-added image, we detect a source at RA(J2000)=19:06:55.88, DEC(J200)=06:45:19.4 (+/-0.5") which is consistent with the objects reported by Im et al. (GCN 12095) and Filgas et al. (GCN 12096). Using as photometric reference the USNO B1.0 star located at RA(J2000) = 19:06:56.17, DEC(J2000)=06:44:25.9 with I=16.56, we derived a preliminary magnitude of I=20.6 (Vega system) for the object inside the XRT error circle. This magnitude might indicate some degree of fading with respect to the i-band AB mag reported by Filgas et al. (GCN 12096). However, we are still cautious on the possible association of this object with the GRB. Further multi-band observations are encouraged." [GCN OPS NOTE(27jun11): Per author's request, the "July" in the second sentence was changed to "June".]
GCN 12099 table
GRB_name GRB110625A
GCN_number 12099
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12099 SUBJECT: GRB 110625A: Swift/UVOT Upper Limits DATE: 11/06/27 19:57:15 GMT FROM: Stephen Holland at USRA/NASA/GSFC/SSC S. T. Holland (CRESST/USRA/GSFC) and K. L. Page (U Leicester) report on behalf of the Swift/UVOT team: The Swift/UVOT observed the field of GRB 110625A starting 127 s after the BAT trigger (Page et al., 2011, GCNC 12088). Settled observations started at 205 s. We do not detect an optical afterglow (or the source reported by Im et al., 2011, GCNC 12095) at the UVOT-enhanced XRT position (Page, et al., 2011, GCNC 12092) 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 Exposure Mag ------------------------------------------------ u (FC) 205 455 246 >20.7 858 1008 147 >20.4 v 511 1233 97 >19.5 b 460 1332 117 >20.6 u 205 1307 471 >21.1 uvw1 560 1282 78 >19.5 uvm2 535 703 39 >18.4 uvw2 486 1339 98 >19.8 ------------------------------------------------ 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} = 10.52 mag, Schlegel et al. 1998, ApJS, 500, 525).
GCN 12100 table
GRB_name GRB110625A
GCN_number 12100
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 12100 SUBJECT: GRB 110625A: Fermi GBM and LAT observations DATE: 11/06/27 21:24:51 GMT FROM: David Gruber at MPE David Gruber (MPE), Nicola Omodei (Stanford U.), Vandiver Chaplin (UAH), J. Chiang (KIPAC/SLAC), J. McEnery (NASA/GSFC), J. L. Racusin (NASA/GSFC) report on behalf of the Fermi GBM and LAT Teams: At 21:08:18.24 UT on 25 June 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 110625A (trigger 330728900 / 110625881), which was also detected by the Swift/BAT (Page et al. 2011, GCN 12088). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 88 degrees at the trigger time. Moreover, this burst was bright enough to result in a Fermi spacecraft autonomous rapid repoint (ARR) maneuver. This burst was also independently detected by INTEGRAL SPI-ACS. The GBM light curve shows several pulses with a duration (T90) of about 27.7 +/- 1.4 s (50-300 keV). The time-averaged spectrum from T0-2.048 s to T0+60.417 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.95 +/- 0.01 and the cutoff energy, parameterized as Epeak, is 209 +/- 3 keV. The event fluence (10-1000 keV) in this time interval is (6.71 +/- 0.02)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+23.9 s in the 10-1000 keV band is 77.3 +/- 0.7 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 175 +/- 5 keV, alpha = -0.85 +/- 0.02 and beta = -2.37 +/- 0.05. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog. The ARR maneuver put the GRB inside the Fermi/LAT field of view for several hundred seconds (from ~100-600 seconds after the GBM trigger). The Spacecraft continued its maneuver toward the Fermi GBM flight software reconstructed position, that was off by 68 degrees from the Enhanced Swift/XRT position (GCN 12092), providing non-optimal exposure for LAT follow-up observations. We analyzed the LAT data and we see significant high-energy emission from a point source coincident with the XRT position, confirming the already reported results by P.H.T. Tam and A.K.H. Kong (GCN 12097). We model the source spectrum with a power law model N(e) = N0 e^{\beta}, and the background including both the contribution from the Galactic diffuse emission and the isotropic contribution due to the residual contamination of charged particles. We detect the GRB in two distinct time periods. In the first time bin (from 237.1 seconds to 316.2 seconds after the GBM trigger), we measure a flux (100 MeV-10 GeV) of (4.9 +/- 1.9) x 1e-05 ph/cm^2/s and a spectral index beta of -2.1 +/- 0.3, with a Test Statistic TS=31. In the second time bin, from 421.7 to 562.3 seconds after the GBM trigger, the measured flux is (3.7 +/- 1.5) x 1e-5 ph/cm^2/s with spectral index beta of -3.6 +/- 0.8 and a TS=19 (stat errors only). The Fermi LAT point of contact for this burst is Nicola Omodei (nicola.omodei@gmail.com). The Fermi LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
GCN 12102 table
GRB_name GRB110625A
GCN_number 12102
Detection_method Suzaku WAM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 12102 SUBJECT: GRB 110625A: Suzaku WAM observation of the prompt emission DATE: 11/06/30 01:17:50 GMT FROM: Takeshi Uehara at Hiroshima U M. Mizuno, T. Uehara, Y. Hanabata, T. Takahashi, M. Ohno, Y. Fukazawa (Hiroshima U.), S. Sugita (Nagoya U.), K. Yamaoka (Aoyama Gakuin U.), N. Vasquez (Tokyo Tech.), Y. Terada, M. Tashiro, W. Iwakiri, K. Takahara, T. Yasuda (Saitama 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 GRB 110625A (Swift/BAT trigger #456073 ; Page et el., GCN 12088 ; Fermi/LAT detection ; Tam and Kong GCN 12097, Gruber et al., GCN 12100) triggered the Suzaku Wide-band All-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at 2011-06-25 21:08:22.01 UT (=T0). The observed light curve shows a multi-peaked structure (starting at T0-1s, ending at T0+28s) with a duration (T90) of about 24 seconds. The fluence in 100 - 1000 keV was 2.54 (+/-0.09) x 10^-05 erg/cm^2. The 1-s peak flux measured from T0+20s was 13.6 (+/-1.0) photons/cm^2/s in the same energy range. Preliminary result shows that the time-averaged spectrum from T0-1s to T0+28s is well fitted by a single power-law with a photon index of 2.26 (+/- 0.09) (chi^2/d.o.f = 31.7/24). However, there might be some calibration uncertainties in the flux value because GRB photons came to the WAM detector by passing through the large Ne dewar of the X-ray micro-calorimeter (XRS). All the quoted errors are at statistical 90% confidence level, in which the systematic uncertainties are not included. 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 12113 table
GRB_name GRB110625A
GCN_number 12113
Detection_method Other
ra 286.7327°
decl 6.7553°
Circular_text TITLE: GCN CIRCULAR NUMBER: 12113 SUBJECT: GRB 110625A, the review of the sky area in plate archives DATE: 11/07/08 10:03:08 GMT FROM: Valentyna Golovnya at Main Astro Obs,Kyiv V.V. Golovnya (Main Astro Obs, Kyiv) report: We have undertaken the review of the sky area in vicinity of GRB 110625A (K.L.Page GCN Circ.12092) on astronegatives, collected in Ukrainian NAS Main astronomical observatory plate archive (1976-1996). All the plates with the possible object appearance are digitized using Microtek ScanMaker 9800XL TMA and Epson Expression 10000XL flatbed scanners and have been placed into Golosiiv Plate Archive database DBGPA with open access to them. The list of plates is given in the table: YYYYMMDD TimeUT --Plates-- Exp. LimMag Star USNOA2 19770902.184249 GUA040C000707B 47.0 15.00 0900-13913512 19770902.184249 GUA040D000708 47.0 15.45 0900-13913709 19900627.223953 GUA040C001670A 18.0 15.45 0900-13913709 19910612.234249 GUA040C001797 22.5 15.00 0900-13913512 19910615.232702 GUA040C001810 22.5 15.00 0900-13913512 19910719.204216 GUA040C001841 22.5 16.20 0900-13907267 19921130.153019 GUA040C000153B 20.0 12.75 0900-13888502 19921201.154830 GUA040D000160 05.5 12.75 0900-13888502 19921201.154840 GUA040C000161B 15.3 12.75 0900-13888502 19921201.162733 GUA040C000163B 15.0 13.20 0900-13901311 19940714.214044 GUA040C002338 20.5 15.45 0900-13913709 Plates-the plate's identifier in GUA040C and GUA040D archives of DWA (D/F=400/2000, M=103"/mm) of the Ukrainian NAS Main Astro obs in Kyiv (Marsden's number - 83)[1]. Exp. - Duration of the maximum exposure (minutes). LimMag - Limited V mag, derived in the 15 minutes area around the location given in Page GCN Circ.12092: RA(J2000): 19h 06m 55.85s, Dec(J2000): +06d 45' 19.2" Star USNOA2 - Comparison star. The preview images of 11 areas together with the 15x15 min.of arc area from SkyMap can be found in http://gua.db.ukr-vo.org/img/grb/110625A/index.html The images with full resolution are available via e-mail on demand. References: 1.L.Pakuliak DATABASE of GOLOSIIV PLATE ARCHIVE (DBGPA V2.0), http://gua.db.ukr-vo.org