//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12112 SUBJECT: GRB 110708A: a long GRB detected by INTEGRAL DATE: 11/07/08 07:15:45 GMT FROM: Diego Gotz at CEA D.Gotz (CEA-Saclay), S.Mereghetti, A.Paizis (IASF-Milano), J. Borkowski (CAMK, Torun), E. Bozzo, C.Ferrigno, M. Beck, V. Savchenko (ISDC, Versoix), on behalf of the IBAS Localization Team report: a gamma ray burst lasting about 50 s has been detected by IBAS in the IBIS/ISGRI data at 04:43:22 U.T. of July 8. Its refined coordinates (J2000) are: RA: 340.1208 [degrees] DEC: +53.9597 [degrees] with an uncertainty of 1.6 arcmin (90% c.l.). A preliminary analysis gives a 20-200 keV peak flux of about 0.8 ph/ cm2 s (2 s integration time), and a fluence of about 2e-6 erg/cm2. A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12115 SUBJECT: GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst DATE: 11/07/08 23:20:47 GMT FROM: Valerio D'Elia at ASDC V. D'Elia, G. Stratta (ASDC) and J. Cannizzo (GSFC) report, on behalf of the Swift team: Swift XRT began a 5ks target of opportunity observation of the field of INTEGRAL burst GRB 110708A (Gotz et al., GCN circ 12112) on 14:25:40 UT, 34.9 ks after the burst trigger. In the first 4.6 ks of data, we detect a source, located at RA, Dec 340.11178, 53.96182 which is equivalent to:   RA(J2000)  = 22h 40m 26.82s   Dec(J2000) = +53d 57' 42.5" with an uncertainty of 5.7 arcseconds (radius, 90% containment). This location is 21 arcseconds from the INTEGRAL reported position, within the INTEGRAL error box. The source count rate is 4.7E-03+/-1.2E-03 cts/s. At the present stage, we cannot assess if the source is fading. This circular is an official product of the Swift Team. ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12116 SUBJECT: GRB 110708A: Lick observations DATE: 11/07/09 05:54:15 GMT FROM: Daniel Perley at U.C. Berkeley D. A. Perley, K. Clubb, M. Ganeshalingam, M. Ellison, D. Cohen, and J. S. Bloom (UC Berkeley) report: We observed the position of INTEGRAL GRB 110708A (Gotz et al., GCN 12112) with the 1-meter Nickel telescope at Lick Observatory starting at 07:30:18 UT, 2.78 hours after the trigger. We acquired four exposures of 300 seconds each (20 minutes total integration) in the I-band filter. The XRT position given by D'Elia et al. (GCN 12115) lies near the center of an asterism of five bright, nearby point-sources (one of which is inside the XRT error circle), all of which are also visible in USNO imaging and are likely Galactic stars. There is a possible, marginal detection of a fainter source within the XRT error circle at: RA=22:40:27.33, dec=+53:57:42.8 (J2000) The approximate magnitude of this object, if real, is I~20.5 (calibrated relative to USNO I-band). It is fainter than the DSS limit and also too faint to clearly detect in individual exposures, so we cannot conclusively associate it with GRB 110708A at this time. We identify no other objects within the XRT error circle to a limiting magnitude of I > 20.3, although the limit is complicated due to crowding from the nearby stars. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12117 SUBJECT: GRB 110708A: Liverpool Telescope observations DATE: 11/07/09 09:27:11 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy Z. Cano (Liverpool JMU), C. Guidorzi (U. Ferrara), R.J. Smith (Liverpool JMU) report on behalf of a large collaboration: On 2011 July 08 at 04:46:10 UT the 2-m Liverpool Telescope automatically began observing the INTEGRAL GRB 110708A (Gotz et al., GCN Circ. 12112) using the gri filters, corresponding to 168 s after the burst trigger time. Inside the XRT error circle (D'Elia et al. GCN Circ. 12115) we do not detect any uncatalogued source. In particular, we do not detect the possible optical counterpart mentioned by Perley et al. (GCN Circ. 12116) down to the following limiting magnitudes: Mid time from Total Exp Filter Magnitude trigger (min) (s) ------------------------------------------------ 20.1 30 i > 20.1 34.7 300 i > 20.4 33.0 360 r > 21.2 ------------------------------------------------ Magnitudes have been calibrated from the nearby USNOB-1 star 1439-0418943 (RA=340.114656, Dec=+53.964514, R2=16.51 mag, I=15.85 mag). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12121 SUBJECT: GRB 110708A: Swift/UVOT Observations DATE: 11/07/09 21:12:03 GMT FROM: Tyler Pritchard at PSU T. A. Pritchard (PSU) and V. D'Elia (ASDC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 110708A 34934 s after the INTEGRAL trigger (Gotz et al., GCN Circ. 12112). A faint detection of a source is detected inside of the Swift/XRT error circle (V. D'Elia et al., GCN Circ 12115) and is consistent with the position of the marginal detection by D. A. Perley et al., GCN Circ. 12116. The source appears to be of constant brightness across UVOT exposures Preliminary 3-sigma magnitudes using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the initial exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag v 34934 46819 1711 19.2 +/- 0.1 v 52022 58006 930 19.1 +/- 0.2 u 35462 53313 2220 >20.9 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.55 in the direction of the burst (Schlegel et al. 1998). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12145 SUBJECT: GRB 110708A: Konkoly observations DATE: 11/07/10 23:41:05 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 INTEGRAL GRB 110708A (Gotz et al., GCN 12112) using the Swift-XRT position provided by Valerio D'Elia. (GCN 12115) 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=22:40:27.33, dec=+53:57:42.8 (J2000) provided by Daniel Perley (GCN 12116). Very near to Perley's position, at RA=22:40:27.24, dec=+53:57:43.6 (J2000) we found a faint marginally visible source which can be identical to Perley's object. Due to the effect of the nearby dense asterism exact photometry was not possible. The brightness of this source according to our estimation (based on nearby UCAC-3 stars) is 23 +/-.5 magnitude in R the band. If Perley's and our object are identical we can suggest a fading nature for this source. Time from the trigger magnitude Band ---------------------------------------- 154435 sec 23 +/- 0.5 R marginal detection //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12150 SUBJECT: IPN triangulation of GRB 110708B (long duration, extremely intense) DATE: 11/07/12 03:40:05 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, K. Hurley on behalf of the Mars Odyssey and MESSENGER GRB teams, J. Goldsten on behalf of the MESSENGER GRNS GRB team, J. Cummings, D. Palmer, S. Barthelmy, N. Gehrels, and H. Krimm, on behalf of the Swift-BAT team, and A. von Kienlin, X. Zhang, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, report: On 2011 July 8 at about 13:59:46 UT, an extremely intense, long duration GRB was observed by Konus-Wind, INTEGRAL (SPI-ACS), MESSENGER, and Swift (BAT) (outside the coded field of view). We have triangulated it to the following 3 sigma error box: ----------------------------------------------- RA(2000), deg Dec(2000), deg ----------------------------------------------- Center: 170.382 (11h 21m 32s) -50.569 (-50d 34' 09") Corners: 170.638 (11h 22m 33s) -50.604 (-50d 36' 14") 169.949 (11h 19m 48s) -50.926 (-50d 55' 34") 170.126 (11h 20m 30s) -50.534 (-50d 32' 02") 170.810 (11h 23m 14s) -50.209 (-50d 12' 32") ----------------------------------------------- The error box area is 489 sq. arcmin. The maximum distance between the box corners is 0.9 deg. This error box may be improved. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 12153 SUBJECT: Konus-Wind observation of GRB 110708B DATE: 11/07/12 11:09:16 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 110708B (localized by IPN: Golenetskii et al., GCN 12150) triggered Konus-Wind at T0=50386.394s UT (13:59:46.394) The burst light curve consists of three main pulse groups, with a total duration of ~60 s. The emission is seen up to ~10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB110708_T50386/ As observed by Konus-Wind the burst had a fluence of (9.4 ± 0.9)x10-5 erg/cm2, and a 64-ms peak flux, measured from T0+12.288 s, of (4.0 ± 0.5)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum of the burst (measured from T0 to T0+47.616 s) is best fitted in the 20 keV - 10 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -0.78 (-0.08, +0.08), the high energy photon index beta = -2.4 (-0.2, +0.15), the peak energy Ep = 294(-28, +30) keV, chi2 = 67.8/84 dof. The spectrum at the maximum count rate (measured from T0+12.544 to T0+12.580 s) is best fitted in the 20 keV - 10 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -0.55 (-0.12, +0.14), the high energy photon index beta = -3.3 (<-2.9), the peak energy Ep = 586(-81, +97) keV, chi2 = 33.3/47 dof. This spectrum is equally well fitted by a power law with exponential cutoff model, for which alpha = -0.59 (-0.07, +0.07), and Ep = 617(-69, +82) keV, chi2 = 34.2/48 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.