//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5834 SUBJECT: GRB 061122A: a long GRB detected by INTEGRAL DATE: 06/11/22 09:22:07 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti, A.Paizis (IASF-Milano), D.Gotz (CEA-Saclay), D.Petry, N.Mowlavi, M. Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A bright GRB lasting about 20 s has been detected by IBAS in IBIS/ISGRI data at 07:56:45 on November 22, 2006 The coordinates (J2000) are: RA: 303.8370 [degrees] DEC: 15.5141 [degrees] with an uncertainty of 2 arcmin (90% c.l.). The light curve is affected by gaps due to telemetry saturation. A plot of the light curve will be posted at http://ibas.mi.iasf.cnr.it/IBAS_Results.html This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5836 SUBJECT: INTEGRAL results on GRB 061122 DATE: 06/11/22 10:32:30 GMT FROM: Sandro Mereghetti at IASF/CNR S.Mereghetti (IASF-Milano), D.Gotz (CEA-Saclay) on behalf of the IBAS Localization Team report: Analysis of the INTEGRAL/IBIS data of GRB 061122 (GCN 5834) indicates that the peak flux in the 20-200 keV range is larger than 11 ph/cmq/s (1-s integration time) and the fluence over the same energy range is larger than 3x10e-6 erg/cmq. This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5841 SUBJECT: Konus-Wind observation of GRB 061122 DATE: 06/11/22 20:15:22 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and T. Cline on behalf of the Konus-Wind team report: The long bright GRB 061122 (Mereghetti et al., GCN 5834, 5836) triggered Konus-Wind at 28608.132 s UT (07:56:48.132). As observed by Konus-Wind it had a duration of ~10 s, fluence 2.31(-0.12, +0.05)x10^-5 erg/cm2, the 64-ms peak flux measured from T0+3.104 s 8.81(-1.05, +0.83)x10^-6 erg/cm2/s (both in the 20 keV - 2 MeV energy range). The time-integrated spectrum of the GRB (from T0 to T0+12.032 s) is well fitted (in the 20 keV - 2 MeV range) by a power law with exponential cutoff model: dN/dE ~ E^(-alpha) * exp(-(2-alpha)*E/Ep) with alpha = 1.03 (-0.07, +0.06) and Ep = 160 (-7, +8) keV (chi2 = 64/62 dof). The fitting by GRBM (band) model yields only an upper limit on high energy photon index: beta < -3.31. All the quoted errors are at the 90% confidence level. The Konus-Wind light curve of this GRB is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB061122_T28608/ //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5842 SUBJECT: GRB061122: Swift-XRT position DATE: 06/11/22 21:00:24 GMT FROM: Andy Beardmore at U Leicester A. P. Beardmore, P. A. Evans, K. L. Page (U Leicester), S. McBreen (MPE) and D. N. Burrows (PSU) report on behalf of the Swift-XRT team: The Swift-XRT began observing the field containing the INTEGRAL burst GRB 061122 (Mereghetti et al., GCN 5834) at 2006-11-22 14:44:38 UT, 24.47 ks after the trigger. In two orbits of Photon Counting mode data totalling 2.35 ks we detect an uncatalogued source at RA(J2000) = 20h 15m 19.80s Dec(J2000) = +15d 31' 03.0" with an uncertainty of 4.0 arcsec (90% containment, using the updated boresight file described by Burrows et al. in GCN Circ. 5750). This is 19.8 arcsec from the initial position reported in GCN 5834, and within the error circle. The source is presently at an XRT count rate of 0.065 count/s, but at this stage of the observation it is impossible to say if it is fading. This circular is an official product of the Swift-XRT team. [GCN OPS NOTE(28nov06): Per author's request, the "14:44" was changed to "14:44:38" and the "24.67 ks" was changed to "24.47 ks".] //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5846 SUBJECT: GRB061122: Swift/UVOT Optical Observations DATE: 06/11/23 13:41:05 GMT FROM: Samantha Oates at MSSL S. R. Oates (UCL-MSSL) & S. McBreen (MPE) report on behalf of the Swift UVOT team. The Swift/UVOT began observing the field of GRB 061122 at 14:47:46 UT on November 22, 2006, around ~7 hours after the INTEGRAL trigger (Mereghetti et al., GCN 5831). We do not find any source in the co-added UVOT observations within the error circle of the XRT (Beardmore et al., GCN 5842). Following are the 3-sigma magnitude upper limits: Filter T_start T_end Exposure 3 sigma UL ------------------------------------------- V 24658 58558 2645 20.69 B 25401 42918 936 20.62 U 25215 42901 1013 20.2 UVW1 25029 59414 1770 19.46 UVM2 24844 58920 2578 20.96 UVW2 24472 58124 2648 21.54 ------------------------------------------- T_start and T_stop are calculated from the time of the burst. The upper limits are not corrected for Galactic extinction E(B-V) = 0.183 mag. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5849 SUBJECT: GRB 061122: Candidate Optical Afterglow DATE: 06/11/24 05:00:33 GMT FROM: Jules Halpern at Columbia U. J. P. Halpern & E. Armstrong (Columbia U.) report on behalf of the MDM Observatory GRB follow-up team: "We obtained R-band observations of the field of INTEGRAL GRB 061122 (Mereghetti et al., GCN 5834) on two consecutive nights using the MDM 2.4m telescope. Within 1" of the Swift XRT candidate X-ray afterglow (Beardmore et al., GCN 5842), we find a fading object at (J2000) R.A.=20h15m19.84s, Decl.=+15d31'02.5" with positional uncertainty ~0.5", and the following magnitudes: ------------------------------------------------ Date(UT) Mid-time(UT) t-t0(hr) R(mag) +/- ------------------------------------------------ Nov. 23 01:52 17.9 22.61 0.05 Nov. 24 02:26 42.5 23.41 0.15 ------------------------------------------------ We propose this as the optical afterglow of GRB 061122. Magnitudes are referenced to the USNO B1.0 star at (J2000) R.A.=20h15m18.48s, Decl.= +15d31'05.5" with R=17.61, and are not corrected for Galactic extinction, A_R=0.49 mag in this direction (Schlegel et al. 1998). MDM images of the field are posted at http://www.astro.columbia.edu/~jules/grb/061122/ This message may be cited." //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5852 SUBJECT: GRB 061122: Confirmation of X-ray/Optical Afterglow DATE: 06/11/24 23:20:51 GMT FROM: Jules Halpern at Columbia U. In follow-up Swift XRT observations of INTEGRAL GRB 061122 (Mereghetti et al., GCN 5834,5836) the X-ray source reported by Beardmore et al. (GCN 5842) as having 0.065 counts/s at 7 hr after the burst, has faded to 0.0047 counts/s averaged over the interval 18-55 hr post burst. Therefore, I regard this as confirmation of the X-ray afterglow as well as the coincident optical afterglow reported in GCN 5849. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 5879 SUBJECT: GRB 061122: GETS observation DATE: 06/11/30 10:10:08 GMT FROM: Kenzo Kinugasa at Gunma Astro. Obs/Japan K. Kinugasa (Gunma Astronomical Observatory) and K. Torii (Osaka U.) report: The error region of INTEGRAL GRB 061122 (Mereghetti et al. GCN 5834) was imaged by the robotic 0.25m GETS telescope in the Gunma Astronomical Observatory. Unfiltered imaging started at 08:46:33 UT (49.1 minutes after the trigger) after the end of twilight. We did not detect the optical afterglow (Halpern et al. GCN 5849) and the following 3-sigma upper limits are derived relative to USNO-A2.0 R mag. ------------------------------------------ StartUT EndUT Limit Exposure ------------------------------------------ 08:46:33 09:01:33 >15.5 30s x 20 ------------------------------------------