//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10234 SUBJECT: GRB 091202: a long GRB detected by INTEGRAL DATE: 09/12/03 00:10:48 GMT FROM: Sandro Mereghetti at IASF/CNR S. Mereghetti, A.Paizis (IASF-Milano), D.Gotz (CEA-Saclay), C.Ferrigno, E.Bozzo, M. Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report: A GRB with duration of about 50 s has been detected by IBAS in IBIS/ISGRI data at 23:10:12 UT on December 2nd. The refined coordinates (J2000) are: RA: 138.8312 [degrees] DEC: 62.544 [degrees] with an uncertainty of 2.5 arcmin (90% c.l.). 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: 10235 SUBJECT: GRB 091202: Liverpool Telescope Observations DATE: 09/12/03 02:14:13 GMT FROM: Carole Mundell at ARI, JMU,Liverpool C.G. Mundell (Liverpool, JMU) reports on behalf of a larger collaboration: "The 2-m Liverpool Telescope robotically followed up GRB091202 (INTEGRAL trigger 5957; Mereghetti et al. GCN 10234) 60.93 min after the GRB trigger time. Preliminary analysis shows no uncatalogued source within a 4.6-arcmin diameter error box centred on the INTEGRAL position to a limiting magnitude i'~19 mag (vs USNOB1). We note the presence of a faint galaxy centred at the INTEGRAL position: http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587737809576592135 This message may be cited" //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10236 SUBJECT: GRB 091202: TAROT Calern observatory optical observations DATE: 09/12/03 02:26:46 GMT FROM: Alain Klotz at CESR-CNRS Klotz A. (CESR-OMP), Gendre B. (IASF), Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report: We imaged the field of GRB 091202 detected by INTEGRAL (trigger 5957) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 35s after the GRB trigger. The elevation of the field increased from 45 degrees above horizon and weather conditions were poor (full moon at 50 deg). The date of trigger : t0 = 2009-12-02T23:10:12 (according to Mereghetti et al. GCNC 10234). The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). We do not detect any OT with a limiting magnitude of: t0+35s to t0+95s : R > 13.0 The second image is 30.0s exposure in tracking mode: t0+114s to t0+144s : R > 15.3 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction (estimated to be 0.13 magnitudes in R band). N.B. Galactic coordinates are lon=152.2 lat=+40.2 //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10239 SUBJECT: GRB 091202 - UVOT-enhanced XRT position DATE: 09/12/03 12:19:18 GMT FROM: Loredana Vetere at PSU L. Vetere (PSU), P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team: Using 1511 s of XRT Photon Counting mode data and 1 UVOT images, 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 =138.83400, 62.54950 which is equivalent to: RA (J2000): 09 15 20.17 Dec (J2000): +62 32 58.1 with an uncertainty of 3.4 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 is an official product of the Swift-XRT team.//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10240 SUBJECT: GRB 091202: Optical and NIR observations DATE: 09/12/03 12:27:22 GMT FROM: Antonio Deugarte at IAA-CSIC A. de Ugarte Postigo (INAF-OAB), A.J. Castro-Tirado, M. Jelinek, J. Gorosabel, S. Guziy (IAA-CSIC) and R. Barrena-Delgado (IAC) report on behalf of a larger collaboration: "We have observed the error box of the INTEGRAL GRB 091202 (Mereghetti et al. GCN 10234) in optical using the 0.8m IAC80 telescope and in NIR using the 1.5m TCS telescope, both located in Teide Observatory (Spain). Optical observations began at 1:26 UT of the 3rd Dec 2009 and included V, R and I imaging. We do not detect any new source within the XRT error box (Vetere et al. GCN10239). In particular in a 600s I band image with mean epoch 3.07 h after the burst onset we do not detect any new source down to a 3-sigma limiting magnitude of I > 19.9 as compared to USNO-B1.0 star 1525-0212637 for which we assume a magnitude of I = 18.26. NIR observations starting at 04:03 UT were obtained with J, H and K filters, with a total of 1000s integration each. We do not detect any new source within the XRT error box. In particular, we obtain a 3-sigma limiting magnitude of K > 17.0 5.12 h after the burst as compared with the 2MASS catalogue. This message may be cited." //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10241 SUBJECT: GRB 091202: Liverpool Telescope observations DATE: 09/12/03 15:15:05 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), C.G. Mundell, D. Bersier, Z. Cano, N.R. Clay, S. Kobayashi, A. Melandri, C.J. Mottram, R.J. Smith, I.A. Steele (Liverpool JMU), A. Gomboc (U. Ljubljana) report on behalf of a large collaboration: On 2009 December 3 at 00:11:21 UT the 2-m Liverpool Telescope automatically began observing the INTEGRAL GRB 091202 (Mereghetti et al., GCN Circ. 10234; Mundell GCN Circ 10235) using the r', i' and z' filters, corresponding to 1.02 hours after the burst. Inside the XRT error circle (Vetere et al. GCN Circ. 10239) we do not detect any source at the following limiting magnitudes: Mid time from Total Exp Filter Magnitude trigger (hr) (s) ------------------------------------------------ 1.48 360 z' > 19.0 1.61 720 i' > 20.7 1.49 720 r' > 20.4 ------------------------------------------------ Magnitudes have been calibrated from the following nearby SDSS stars: RA Dec z' i' r' ----------------------------------------------- 138.81006 +62.53208 15.16 15.24 15.41 138.82579 +62.53708 18.73 18.73 18.90 ----------------------------------------------- //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10242 SUBJECT: GRB 091202: Swift/UVOT Upper Limits DATE: 09/12/03 16:34:23 GMT FROM: Alice Breeveld at MSSL-UCL A. Breeveld (MSSL/UCL) and L. Vetere (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 091202 2363 s after the Integral trigger (Mereghetti et al., GCN Circ. 10234). No new sources are found at the XRT position (Vetere et al., GCN Circ. 10239) in the initial UVOT exposures. Preliminary 3-sigma upper limits 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 white 3120 3869 738 >21.7 v 3876 4357 473 >19.5 u 2363 3113 738 >20.9 The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.051 in the direction of the burst (Schlegel et al. 1998). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10243 SUBJECT: GRB091202: Swift-XRT refined analysis DATE: 09/12/03 20:13:43 GMT FROM: Loredana Vetere at PSU L. Vetere (PSU) reports on behalf of the Swift-XRT team: We have analysed 5.6 ks of XRT data for GRB 091202 (Mereghetti et al. GCN Circ. 10234) from 2364 s to 26.9 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Vetere et al. (GCN. Circ 10239). The light curve is decaying but we do not have enough data to estimate the decay slope and no more observations are planned at this time. The spectrum comprises only 27 photons, but it can be fitted with an absorbed power-law with a photon spectral index of 2.2 (+0.9 -0.8). The best- fitting absorption column is 2.0 (+2.9, -1.2) x 10^21 cm^-2, in excess of the Galactic value of 3.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.2 x 10^-11 (6.4 x 10^-11) erg cm^-2 count^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00020123. This circular is an official product of the Swift-XRT team.//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10247 SUBJECT: GRB 091202: GTC & CAHA optical/nIR afterglow candidate DATE: 09/12/05 00:25:15 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia A. de Ugarte Postigo (INAF-OAB), A.J. Castro-Tirado, J. Gorosabel, M. Jelínek, S. Guziy (IAA-CSIC), A. Cabrera-Lavers, D. García, G. Gómez (GTC/IAC), G. Bergond (CAHA), D. Pérez-Ramírez (Univ. de Jaén), R. Cuniffe (IAA-CSIC) and P. Kubánek (IAA-CSIC, U. Valencia) report on behalf of a larger collaboration: "We have observed the field of the INTEGRAL GRB 091202 (Mereghetti et al. GCN 10234) using OSIRIS at the 10.4m Gran Telescopio Canarias (GTC) at the Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, in the island of La Palma. Observations were carried out between 04:55 and 05:23 UT on 4 December 2009 (~1.25 days after the burst). The observation consisted of 5x30s exposures in r, i and z bands. Addtional near-IR observations were obtained in with Omega2000 at the 3.5m telescope at the German-Spanish Calar Alto Observatory in J, H and K' bands between 01:06 and 04:46 UT. Within the XRT error circle (Vetere et al. GCN 10239) we detect two sources, one point-like and one apparently extended in all three GTC frames. Only one source (point-like) shows up in the near-IR frame, which appears to be superimposed to the extended one seen in the optical. This will imply a strong red colour (r-H >= 4) typical of GRB afterglows (Gorosabel et al. 2002, A&A 384, 11). Hence, we identify this source as the likely afterglow to GRB 091202, at coordinates (J2000.0): R.A.: 09 15 19.75 Dec.: +62 32 59.0 with a 0".5 astrometry error. At a mean epoch of 1.25 days after the burst, we measure for it a magnitude of r = 23.7 ± 0.1. From the nIR observations we measure H = 19.7 ± 0.2. at a mean epoch 1.21 days after the burst. For the optical photometry we used the SDSS star located at coordinates R.A.: 09 15 21.23, Dec: +62 32 33.4 (J2000.0) for which we assume a magnitude of r = 21.27. The nIR images were calibrated against a 2MASS star at coordinates R.A.: 09 15 14.41, Dec: +62:31:55.5 (J2000.0) with H = 13.94. Based on the optical GTC image, at this moment we cannot rule out that the optical flux arises from an underlying somehow extended blue galaxy whereas the highly extincted afterglow is only observed in the nIR. A figure showing the optical & nIR images of the likely afterglow to GRB 091202 can be found at: http://www.iaa.es/~gss/GRB091202 This message may be quoted."