//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14731 SUBJECT: GRB 130603A: Swift detection of a burst DATE: 13/06/03 06:08:14 GMT FROM: David Palmer at LANL A. Melandri (INAF-OAB), C. Gronwall (PSU), C. B. Markwardt (NASA/GSFC), D. M. Palmer (LANL) and T. Sakamoto (AGU) report on behalf of the Swift Team: At 05:59:32 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 130603A (trigger=557274). Swift could not immediately slew to the burst due to an Earth limb constraint. The BAT on-board calculated location is RA, Dec 86.954, +82.934 which is RA(J2000) = 05h 47m 49s Dec(J2000) = +82d 56' 02" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single FRED structure with a duration of about 100 sec. The peak count rate was ~1275 counts/sec (15-350 keV), at ~1 sec after the trigger. Due to an observing constraint, Swift will not slew until T0+49.7 minutes. There will be no XRT or UVOT data until this time. Burst Advocate for this burst is A. Melandri (andrea.melandri AT brera.inaf.it). 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.) //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14732 SUBJECT: GRB 130603A: Swift-XRT and Swift-UVOT detections DATE: 13/06/03 07:40:26 GMT FROM: Andrea Melandri at INAF-OAB A. Melandri (INAF/OAB) reports on behalf of the Swift team: Swift-XRT observed the field of GRB 130603A (Melandri et al., GCN Circ. 14731) starting at T0+49.7 minutes due to an observing constraint. Using promptly downlinked data we find an uncatalogued X- ray source located at RA, Dec = 86.8938, 82.9099 which is equivalent to: RA (J2000.0) = 05 47 34.51 DEC (J2000.0) = +82 54 35.7 with an uncertainty of 3.7 arcsec (radius, 90% containment). A source is also detected by Swift-UVOT located at RA, Dec = 86.8914, 82.9087 which is equivalent to RA (J2000.0) = 05 47 33.9 DEC (J2000.0) = +82 54 31.3 with an uncertainty of 0.8 arcsec (radius, 90% containment). 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). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14733 SUBJECT: GRB 130603A: Swift-XRT observations DATE: 13/06/03 07:56:30 GMT FROM: Phil Evans at U of Leicester D.N. Burrows (PSU), J.A. Kennea (PSU), M. Perri (ASDC), G. Tagliaferri (INAF-OAB), P.A. Evans (U. Leicester) and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team: The XRT began observing the field of GRB 130603A at 06:51:16.2 UT, 3103.6 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 86.89380, 82.90992 which is equivalent to: RA(J2000) = 05h 47m 34.51s Dec(J2000) = +82d 54' 35.7" with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 90 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 gives a column density in excess of the Galactic value (5.28 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 4.9 (+2.95/-2.45) x 10^21 cm^-2 (90% confidence). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14734 SUBJECT: GRB 130603A: MITSuME Okayama Optical Observation DATE: 13/06/03 14:05:22 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration: We observed the field of GRB 130603A (Melandri et al., GCNC 14731) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. The observation started on 2013-06-03 11:14:06 UT (~5.2 h after the burst). We detected the previously reported afterglow (Melandri, GCNC 14732) in all the three bands. Photometric results of the OT are listed below. We used SDSS catalog for flux calibration. #T0+[day] MID-UT T-EXP[sec] g' g'_err Rc Rc_err Ic Ic_err ----------------------------------------------------------------------- 0.22890 11:29:09 1560.0 18.3 0.3 18.4 0.2 18.1 0.3 0.24993 11:59:26 1500.0 18.9 0.3 18.8 0.2 18.2 0.3 ------------------------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec] //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14736 SUBJECT: GRB 130603A: Swift-BAT refined analysis DATE: 13/06/03 17:33:38 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), A. Melandri (INAF-OAB), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-60 to T+243 sec from recent telemetry downlinks, we report further analysis of BAT GRB 130603A (trigger #557274) (Melandri, et al., GCN Circ. 14731). The BAT ground-calculated position is RA, Dec = 86.859, 82.910 deg, which is RA(J2000) = 05h 47m 26.1s Dec(J2000) = +82d 54' 36.7" with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 98%. The mask-weighted light curve shows mostly smooth peak starting at ~T-10 sec, peaking at ~T+11 sec, and ending at ~T+115 sec. T90 (15-350 keV) is 76 +- 19 sec (estimated error including systematics). The time-averaged spectrum from T-19.5 to T+104.5 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.83 +- 0.12. The fluence in the 15-150 keV band is 1.9 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+11.27 sec in the 15-150 keV band is 0.8 +- 0.1 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/557274/BA/ //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14737 SUBJECT: GRB 130603A: Enhanced Swift-XRT position DATE: 13/06/03 19:34:56 GMT FROM: Phil Evans at U of Leicester A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team. Using 4017 s of XRT Photon Counting mode data and 6 UVOT images for GRB 130603A, 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 = 86.89660, +82.90853 which is equivalent to: RA (J2000): 05h 47m 35.18s Dec (J2000): +82d 54' 30.7" with an uncertainty of 1.5 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 was automatically generated, and is an official product of the Swift-XRT team. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14738 SUBJECT: Swift/UVOT observations of GRB130603A DATE: 13/06/03 19:36:24 GMT FROM: Massimiliano de Pasquale at MSSL-UCL M. De Pasquale (MSSL/UCL) and A. Melandri (INAF/OAB) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 130603A 3325 s after the BAT trigger (Melandri et al., GCN Circ. 14731). The uncatalogued source reported in Melandri et al., GCN Circ. 14732, is detected in the summed exposures. Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the summed exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white 3686 5322 393 19.61 ± 0.15 v 4097 5562 197 >19.02 b 3481 16641 1278 19.71 ± 0.15 u 3275 15729 1278 19.19 ± 0.13 uvw1 4507 4707 197 19.62 ± 0.39 (2.8 sigma) uvm2 4302 4502 197 >19.63 uvw2 3892 5528 393 20.25 ± 0.37 (2.8 sigma) The possible detection of the optical source in uw2 filter indicates a redshift z < ~1.5 for this event. The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.06 in the direction of the burst (Schlegel et al. 1998). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14740 SUBJECT: GRB 130603A: Swift-XRT refined Analysis DATE: 13/06/03 22:15:16 GMT FROM: Andrea Melandri at INAF-OAB A. Melandri (INAF-OAB) reports on behalf of the Swift-XRT team: We have analysed 13 ks of XRT data for GRB 130603A (Melandri et al. GCN Circ. 14731), from 3.1 ks to 34.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 14737). The light curve can be modelled with a power-law decay with a decay index of alpha=0.52 (+/-0.07). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.32 (+0.18, -0.17). The best-fitting absorption column is 4.7 (+0.8, -0.7) x 10^21 cm^-2, in excess of the Galactic value of 5.3 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 3.8 x 10^-11 (8.5 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 4.7 (+0.8, -0.7) x 10^21 cm^-2 Galactic foreground: 5.3 x 10^20 cm^-2 Excess significance: 9.9 sigma Photon index: 2.32 (+0.18, -0.17) If the light curve continues to decay with a power-law decay index of 0.52, the count rate at T+24 hours will be 0.028 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.1 x 10^-12 (2.4 x 10^-12) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00557274. This circular is an official product of the Swift-XRT team. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14750 SUBJECT: GRB 130603A: SON optical observations DATE: 13/06/04 06:39:09 GMT FROM: Arto Oksanen at Nyrola Obs., Finland P. Kehusmaa, A. Oksanen and C. Harlingten report on behalf of the Searchlight Observatory Network: On 2013 June 03, starting at 06:42 UT (T0+42.5 minutes), we observed the field of GRB130603A (Melandri et al., GCN Circ. 14731) with the 0.40 m NM1 telescope located in New Mexico, USA with Apogee Alta U42 CCD for 3x120 seconds using the V filter and 7x120 seconds unfiltered. The afterglow reported by Melandri et. al. (GCNC 14732) is detected in all unfiltered images and in the coadded V band image. We report following differental photometry: UTC (mid) T0+(h) Mag Err Filter ---------------------------------------------------------- 2013-06-03T06:44:21 0.75 18.78 0.13 V 2013-06-03T06:59:55 1.00 18.79 0.07 clear ---------------------------------------------------------- The reference magnitude from the nearby USNO B1.0 star (1729-0016610) with R=16.49. A snapshot showing our coadded unfiltered image can be found at the URL http://pilvi.dyndns.org/arto/GRB130603A_C_840s.jpg //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14755 SUBJECT: GRB 130603A: MITSuME Akeno Optical observation DATE: 13/06/04 09:17:36 GMT FROM: Taketoshi Yoshii at Tokyo Tech K. Ito, Y. Saito, Y. Yano, R. Usui, Y. Tachibana, T. Yoshii, S. Kurita, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration: We observed the field of GRB 130603A (Melandri et al., GCNC 14731) with the optical three color (g, Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan. The observation started on 2013-06-03 10:10:04 UT ( ~4.2 h after the burst). And we could not find any new point source within the XRT error circle (Beardmore et al., GCNC 14737) in all the three bands. The results of photometry (3 sigma upper limits) are listed below. We used GSC2.3 catalog for flux calibration. T0+[hour] MID-UT T-EXP[sec] g' Rc Ic -------------------------------------------------------------------------------------------- 4.175 12:30:14 9054 >19.4 >19.4 >18.7 -------------------------------------------------------------------------------------------- T0+ : Elapsed time after the burst [hour] T-EXP: Total Exposure time [sec] //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 14813 SUBJECT: GRB 130603A: AAO optical observations DATE: 13/06/07 18:24:37 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), R.Inasaridze (AAO), O. Kvaratskhelia (AAO), V. Ayvazian(AAO), Yu. Krugly (IA KhNU), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift Swift GRB 130603A (Melandri et al., GCN 14731)with AS-32 (0.7m) telescope of Abastumani Observatory on Jun. 03 and Jun. 04. We obtained several unfiltered images of 300 s and 180 s exposures. The afterglow (Melandri et al., GCN 14732) is well detected in combined images in both epochs. Preliminary photometry Date T_start t-t0, exp, OT (UT) mid, d s 2013-06-03 22:19:06 0.69976 9x300 20.30 +/- 0.09 2013-06-04 20:28:49 1.62003 13x180 21.60 +/- 0.19 is based on SDSS stars R mag, where R mag obtained via transformations ugriz in BVRI (Lupton, 2005): n SDSS R errR 1 J054806.91+825053.0 17.648 0.015 2 J054805.54+825456.1 16.750 0.013 3 J054706.99+825234.5 15.573 0.012