//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10920 SUBJECT: GRB 100701B: Fermi GBM detection DATE: 10/07/02 08:50:29 GMT FROM: Suzanne Foley at MPE S. Foley (MPE) reports on behalf of the Fermi GBM Team: "At 11:45:23.07 UT on 01 July 2010, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 100701B (trigger 299677525 / 100701490). The on-ground calculated location, using the GBM trigger data, is RA = 45.49, DEC = -3.43 (J2000 degrees, equivalent to 03 h 02 m, -03 d 26 '), with an uncertainty of 1.0 degree (radius, 1-sigma containment, statistical only; there is additionally a systematic error which is currently estimated to be 2 to 3 degrees). The angle from the Fermi LAT boresight is 107 degrees. The GBM light curve consists of at least six main pulses with a duration (T90) of about 27.5 (+/-0.9) s (8-1000 keV). The time-averaged spectrum from T0-1.2 s to T0+32.7 s is well fit by a power law function with an exponential high energy cutoff. The power law index is -0.99 (+/-0.02) and the cutoff energy, parameterized as Epeak, is 1.85 (+/-0.16) MeV (CSTAT 695.8 for 360 d.o.f.). The event fluence (8-1000 keV) in this time interval is (2.86 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+3.4 s in the 8-1000 keV band is 22.6 +/- 0.3 ph/s/cm^2. A Band function fits the spectrum equally well (CSTAT 689.8 for 359 d.o.f.) with Epeak= 1.48 (+0.19/-0.17) MeV, alpha = -0.95 (+/-0.03) and beta = -2.47 (+0.18/-0.25) . The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog." //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10938 SUBJECT: IPN triangulation of GRB 100701B DATE: 10/07/05 22:08:23 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin and T. Cline on behalf of the Konus-Wind team, J. Goldsten, and K. Hurley on behalf of the MESSENGER GRNS GRB team, V. Connaughton, M.S. Briggs, and C.A. Meegan on behalf of the Fermi GBM team, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, and K. Yamaoka, M. Ohno, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada, T. Murakami, K. Makishima, and Y. Hanabata on behalf of the Suzaku-WAM team, report: The long bright GRB 100701B, seen by Fermi/GBM (Foley, GCN 10920), has also been detected by INTEGRAL (SPI-ACS), Suzaku (WAM), Konus-Wind, and MESSENGER (GRNS) so far. We have triangulated it to a 3 sigma error box whose coordinates are: ----------------------------------------------- RA(2000), deg Dec(2000), deg ----------------------------------------------- Center: 43.109 (02h 52m 26s) -2.224 (-02d 13' 25") Corners: 43.260 (02h 53m 02s) -2.497 (-02d 29' 49") 43.081 (02h 52m 19s) -2.310 (-02d 18' 36") 42.959 (02h 51m 50s) -1.947 (-01d 56' 50") 43.138 (02h 52m 33s) -2.137 (-02d 08' 14") ----------------------------------------------- The error box area is 149.7 sq. arcmin. This error box may be improved. The GBM position (Foley, GCN 10920) is 2.7 deg from the center of the box. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10939 SUBJECT: Konus-Wind observation of GRB 100701B DATE: 10/07/06 08:05:36 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 hard GRB 100701B (localized by IPN, Golenetskii et al., GCN 10938) triggered Konus-Wind at T0=42319.075s UT (11:45:19.075) The burst light curve consists of several (>6) short hard pulses with a total duration of ~15 s. The emission is clearly seen up to 10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB100701_T42319/ As observed by Konus-Wind the burst had a fluence of 5.0(+/-0.85)x10-5 erg/cm2, and a 256-ms peak flux measured from T0+3.584s of 2.2+/-0.3)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+16.640 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -0.90 (+/-0.10), the high energy photon index beta = -2.7 ( <-2.1 ), the peak energy Ep = 1186(-243, +294)keV (chi2 = 74.4/84 dof). The spectrum at the maximum count rate (measured from T0+0.256 to T0+8.848 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -0.80 (+/-0.10), the high energy photon index beta = -2.6 ( <-2.2 ), the peak energy Ep = 1202(-217, +246)keV (chi2 = 90/84 dof). All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.