//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27319 SUBJECT: Swift GRB200306.01: Global MASTER-Net observations report DATE: 20/03/06 00:34:28 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB200306.01 (trigger No 959917,06h 44m 24.72s , -62d 00m 18.0s, R=0.00130556) errorbox 12 sec after notice time and 49 sec after trigger time at 2020-03-06 00:21:46 UT, with upper limit up to 18.5 mag. The observations began at zenith distance = 31 deg. The sun altitude is -17.1 deg. The galactic latitude b = -24 deg., longitude l = 272 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1305993 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 55 | MASTER-OAFA | C | 10 | 17.2 | 96 | MASTER-OAFA | C | 10 | 17.2 | 144 | MASTER-OAFA | C | 20 | 17.7 | 201 | MASTER-OAFA | C | 30 | 18.0 | 274 | MASTER-OAFA | C | 50 | 18.3 | 361 | MASTER-OAFA | C | 60 | 18.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27320 SUBJECT: GRB 200306A: Swift detection of a burst DATE: 20/03/06 00:38:35 GMT FROM: David Palmer at LANL K. K. Simpson (PSU), D. M. Palmer (LANL) and B. Sbarufatti (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 00:19:40 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200306A (trigger= 959917). Swift slewed immediately to the burst. Due to communications outages, no BAT data is immediately available at this time, but the complete data set will be available after upcoming downlinks to the ground. Using promptly downlinked data we find a bright, uncatalogued X-ray source with an enhanced position: RA, Dec 101.1050, -62.0058 which is equivalent to: RA(J2000) = 06h 44m 25.20s Dec(J2000) = -62d 00' 20.9" with an uncertainty of 3.6 arcseconds (radius, 90% containment). This position may be improved as more data are received; the latest position is available at https://www.swift.ac.uk/sper. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 8.67 x 10^20 cm^-2 (Willingale et al. 2013). The initial flux in the 2.5 s image was 3.02e-09 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of nominal 150.000 seconds with the White filter starting 85s seconds after the BAT trigger. Automatic processing failed because of connectivity issues on the ground. Further analysis will be available once the full dataset gets on the ground. Burst Advocate for this burst is K. K. Simpson (kira.simpson1984 AT gmail.com). 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/) //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27321 SUBJECT: GRB 200306A: Potential LCO Optical Afterglow Detection DATE: 20/03/06 06:15:31 GMT FROM: Robert Strausbaugh at U. of the Virgin Islands R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (U. of the Virgin Islands/College of Marin) report on behalf of a larger collaboration: We observed Swift GRB 200306A (Simpson et al., GCN 27320) with the LCO 1-m Sinistro instrument at the Cerro Tololo Interamerican Observatory, Chile site, on March 6, from 1:06 to 1:46 UT (corresponding to 0.78 to 1.45 hours from the GRB trigger time) with the Bessel I and R filters. We performed a series of 5x240s exposures in I and R. We detect a faint source in stacked R band images within the XRT error region that is not present in USNO or 2MASS catalogs. We do not detect a source in stacked I band images. Using the USNO-B.1 catalog as reference, we obtain the following magnitude detection in R at RA,DEC=101.1054814,-62.0049360 and the following 3-sigma upper limit in I: R = 21.75 I > 21.52 R.S. is funded by NSF AST grant #1831682 //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27324 SUBJECT: Swift GRB200306.95: Global MASTER-Net OT detection DATE: 20/03/06 22:57:02 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory MASTER-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the GRB200306.95 41 sec after notice time and 85 sec after trigger time at 2020-03-06 22:52:04 UT. On our first (20s exposure) set we found 1 optical transient within Swift error-box (ra=198.579 dec=11.2547 r=0.05) brighter than 17.0. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 95 2020-03-06 22:52:04 20 (13h 14m 13.50s , +11d 16m 12.0s) 14.9 The 5-sigma upper limit has been about 17.0mag The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27325 SUBJECT: Swift GRB200306.95: Global MASTER-Net OT detection DATE: 20/03/06 22:58:14 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, F. Balakin Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the GRB200306.95 20 sec after notice time and 63 sec after trigger time at 2020-03-06 22:51:42 UT. On our first (10s exposure) set we found 1 optical transient within Swift error-box (ra=198.579 dec=11.2547 r=0.05) brighter than 16.3. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 68 2020-03-06 22:51:42 10 (13h 14m 13.43s , +11d 16m 11.4s) 14.1 The 5-sigma upper limit has been about 16.3mag The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27327 SUBJECT: Swift GRB200306.95: Global MASTER-Net observations report DATE: 20/03/06 23:04:08 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB200306.95 (trigger No 960102,13h 14m 19.68s , +11d 15m 18.0s, R=0.05) errorbox 18 sec after notice time and 63 sec after trigger time at 2020-03-06 22:51:42 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 32 deg. The sun altitude is -47.4 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB200306.95 errorbox 40 sec after notice time and 85 sec after trigger time at 2020-03-06 22:52:04 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 36 deg. The sun altitude is -49.3 deg. The galactic latitude b = 73 deg., longitude l = 324 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1306689 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 69 | MASTER-Kislovodsk | P- | 10 | 16.9 | 89 | MASTER-Kislovodsk | P- | 50 | 18.0 | Coadd 69 | MASTER-Kislovodsk | P| | 10 | 16.8 | 89 | MASTER-Kislovodsk | P| | 50 | 17.9 | Coadd 91 | MASTER-Kislovodsk | P- | 20 | 17.4 | 91 | MASTER-Kislovodsk | P| | 20 | 17.2 | 96 | MASTER-Tavrida | C | 20 | 17.5 | 121 | MASTER-Tavrida | C | 70 | 18.2 | Coadd 117 | MASTER-Kislovodsk | P- | 20 | 17.3 | 117 | MASTER-Kislovodsk | P| | 20 | 17.2 | 136 | MASTER-Tavrida | C | 20 | 17.5 | 149 | MASTER-Kislovodsk | P- | 30 | 17.1 | 149 | MASTER-Kislovodsk | P| | 30 | 17.5 | 184 | MASTER-Kislovodsk | P| | 100 | 18.3 | Coadd 181 | MASTER-Tavrida | C | 30 | 17.7 | 185 | MASTER-Kislovodsk | P- | 30 | 17.6 | 230 | MASTER-Kislovodsk | P- | 120 | 18.5 | Coadd 185 | MASTER-Kislovodsk | P| | 30 | 17.5 | 227 | MASTER-Kislovodsk | P- | 40 | 17.9 | 227 | MASTER-Kislovodsk | P| | 40 | 17.6 | 237 | MASTER-Tavrida | C | 40 | 18.0 | 297 | MASTER-Tavrida | C | 160 | 18.9 | Coadd 278 | MASTER-Kislovodsk | P- | 50 | 18.1 | 278 | MASTER-Kislovodsk | P| | 50 | 17.8 | 343 | MASTER-Kislovodsk | P| | 180 | 18.6 | Coadd 302 | MASTER-Tavrida | C | 50 | 18.2 | 340 | MASTER-Kislovodsk | P- | 60 | 18.2 | 420 | MASTER-Kislovodsk | P- | 220 | 18.9 | Coadd 340 | MASTER-Kislovodsk | P| | 60 | 17.9 | 383 | MASTER-Tavrida | C | 70 | 18.3 | 411 | MASTER-Kislovodsk | P- | 70 | 18.2 | 411 | MASTER-Kislovodsk | P| | 70 | 18.1 | 483 | MASTER-Tavrida | C | 90 | 18.5 | 498 | MASTER-Kislovodsk | P- | 90 | 18.2 | 498 | MASTER-Kislovodsk | P| | 90 | 18.1 | 605 | MASTER-Kislovodsk | P- | 110 | 18.2 | 605 | MASTER-Kislovodsk | P| | 110 | 18.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27331 SUBJECT: GRB 200306A: Swift-XRT refined Analysis DATE: 20/03/07 00:38:06 GMT FROM: Phil Evans at U of Leicester J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), E. Ambrosi (INAF-IASFPA) , M. Capalbi (INAF-IASFPA), M. Perri (ASDC), B. Sbarufatti (PSU), D.N. Burrows (PSU), J. D. Gropp (PSU), A.P. Beardmore (U. Leicester) and K.K. Simpson report on behalf of the Swift-XRT team: We have analysed 2.1 ks of XRT data for GRB 200306A (Simpson et al. GCN Circ. 27320), from 66 s to 6.2 ks after the BAT trigger. The data comprise 186 s in Windowed Timing (WT) mode (the first 9 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. Using 2051 s of PC mode data and 6 UVOT images, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 101.10233, -62.00654 which is equivalent to: RA (J2000): 06h 44m 24.56s Dec(J2000): -62d 00' 23.5" with an uncertainty of 1.5 arcsec (radius, 90% confidence). The light curve can be modelled with a power-law decay with a decay index of alpha=4.05 (+/-0.21). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.93 (+/-0.14). The best-fitting absorption column is 5.2 (+/-0.5) x 10^21 cm^-2, in excess of the Galactic value of 8.6 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.89 (+0.19, -0.18) and a best-fitting absorption column of 4.3 (+1.1, -0.9) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.2 x 10^-11 (6.3 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 4.3 (+1.1, -0.9) x 10^21 cm^-2 Galactic foreground: 8.6 x 10^20 cm^-2 Excess significance: 6.0 sigma Photon index: 1.89 (+0.19, -0.18) If the light curve continues to decay with a power-law decay index of 4.05, the count rate at T+24 hours will be 3.6 x 10^-11 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.5 x 10^-21 (2.3 x 10^-21) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00959917. This circular is an official product of the Swift-XRT team. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27340 SUBJECT: GRB 200306A: AstroSat CZTI detection DATE: 20/03/07 16:08:56 GMT FROM: Soumya Gupta at IUCAA/ASTROSAT S. Gupta, V. Sharma, A. Vibhute and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data showed the detection of the long GRB 200306A, which was also detected by Global MASTER-Net (Lipunov V. et al., GCN #27319), Swift (Simpson K. et al., GCN #27320) and Potential LCO (Strausbaugh R. et al., GCN #27321). The source was clearly detected in the 40-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-03-06 00:19:55.46 UT. The measured peak count rate associated with the burst is 323 +/- 20.4 cts/s above the background in the combined data of four quadrants, with a total of 5603 +/- 41.2 cts. The local mean background count rate was 525 +/- 0.9 cts/s. Using cumulative rates, we measure a T90 of 33.7 +/- 0.07 s. CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27343 SUBJECT: GRB 200306A: RATIR Optical Observations DATE: 20/03/07 21:07:13 GMT FROM: Alan M Watson at UNAM Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jesús González (UNAM), Carlos Román-Zúñiga (UNAM), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (U. Wash.), and Vicki Toy (UMD) report: We observed the field of GRB 200306A (Gropp et al., GCN Circ. 27326) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir from 2020/03 7.27 to 2020/03 7.54 UTC (7.61 to 14.01 hours after the BAT trigger), obtaining a total of 4.31 hours exposure in the r and i bands. For a source within the Swift-XRT error circle, in comparison with the SDSS DR9 catalog, we obtain the following 3-sigma upper limits : r > 23.34 i > 23.71 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. We thank the staff of the Observatorio Astronómico Nacional in San Pedro Mártir. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27346 SUBJECT: GRB 200306A: Swift-BAT refined analysis DATE: 20/03/07 23:12:45 GMT FROM: Amy Lien at GSFC T. Sakamoto (AGU), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), K. K. Simpson (PSU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team): Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200306A (trigger #959917) (Simpson et al., GCN Circ. 27320). The BAT ground-calculated position is RA, Dec = 101.114, -62.010 deg which is RA(J2000) = 06h 44m 27.3s Dec(J2000) = -62d 00' 34.4" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 75%. The mask-weighted light curve shows a few overlapping pulses that starts at ~T-4 s and ends at ~T+50 s. The main peak occurs at ~T+20 s. T90 (15-350 keV) is 32.87 +- 1.13 sec (estimated error including systematics). The time-averaged spectrum from T-3.67 to T+49.95 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.06 +- 0.15, and Epeak of 81.6 +- 6.9 keV (chi squared 32.91 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 1.0 +- 0.02 x 10^-5 erg/cm2 and the 1-sec peak flux measured from T+20.11 sec in the 15-150 keV band is 7.0 +- 0.3 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.70 +- 0.03 (chi squared 98.65 for 57 d.o.f.). 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/959917/BA/ //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27351 SUBJECT: GRB 200306A: Swift/UVOT Upper Limits DATE: 20/03/08 22:55:27 GMT FROM: Sam LaPorte at PSU GRB 200306A: Swift/UVOT Upper Limits J. D. Gropp (PSU) and K. K. Simpson (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 200306A 85 s after the BAT trigger (Simpson et al., GCN Circ. 27320). No optical afterglow consistent with the optical position (Strausbaugh et al., GCN Circ. 27321) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 85 235 147 >21.0 white 85 6191 459 >20.7 v 5049 11928 1011 >20.1 b 4434 16845 1278 >20.5 u 297 5864 351 >20.1 w1 5459 5659 197 >19.7 m2 5254 5454 197 >19.1 w2 4844 11087 1082 >20.3 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.10 in the direction of the burst (Schlegel et al. 1998).