GRB200115A

This page lists all entries on GRB200115A in GRBweb

Summary IPN Swift GCN 26771 GCN 26772 GCN 26776 GCN 26780 GCN 26790 GCN 26792 GCN 26801 GCN 26809 GCN 26818 GCN 26872 GCN 27162

Summary table
Variable Value Source
T0 11:50:23 UTC GCN_circulars,Swift Det
ra 56.4530° Swift
decl 5.6070° Swift
pos_error 8.54e-03° Swift
T90 158.4 s Swift
T90_start 11:50:23 UTC Swift
fluence 1.00e-05 erg/cm² Swift
T100 158.4 s
GBM_located False
mjd 58863.49332175926 GCN_circulars,Swift Det
IPN table
GRB_name GRB200115A
ra 56.4542°
decl 5.6167°
pos_error 5.00e-02°
Swift table
GRB_name GRB200115A
t_trigger 11:50:23 UTC
ra 56.4530°
decl 5.6070°
pos_error 8.54e-03°
T90 158.4 s
fluence 1.00e-05 erg/cm²
GCN 26771 table
GRB_name GRB200115A
GCN_number 26771
Detection_method Swift Det
t_trigger 11:50:23 UTC
ra 56.4540°
decl 5.6130°
Circular_text TITLE: GCN CIRCULAR NUMBER: 26771 SUBJECT: GRB 200115A: Swift detection of a burst DATE: 20/01/15 12:10:54 GMT FROM: Kim Page at U.of Leicester S. B. Cenko (GSFC), E. Ambrosi (INAF-IASFPA), A. D'Ai (INAF-IASFPA), V. D'Elia (SSDC), J.D. Gropp (PSU), N. J. Klingler (PSU) and K. L. Page (U Leicester) report on behalf of the Neil Gehrels Swift Observatory Team: At 11:50:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200115A (trigger=949361). Swift did not slew to the burst. The BAT on-board calculated location is RA, Dec 56.454, +5.613 which is RA(J2000) = 03h 45m 49s Dec(J2000) = +05d 36' 46" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 300 sec. The peak count rate was ~2600 counts/sec (15-350 keV), at ~101 sec after the trigger. Due to observations at a higher merit related to the follow-up of the GW event S200115j, Swift will not slew to the BAT position. There will thus be no XRT or UVOT data for this trigger. Burst Advocate for this burst is S. B. Cenko (brad.cenko AT nasa.gov). 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/)
GCN 26772 table
GRB_name GRB200115A
GCN_number 26772
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 26772 SUBJECT: GRB 200115A: Nanshan-0.6m optical upper limit DATE: 20/01/15 12:56:33 GMT FROM: Dong Xu at NAOC/CAS Z.P. Zhu, D. Xu, X. Liu, B.Y. Yu, Y. Ma (NAOC), X. Gao (Urumqi No.1 Senior High School) report: We observed the field of GRB 200115A (Cenko et al., GCN 26771) using the 0.6m NEXT telescope located at Nanshan, Xinjiang, China. Observations started at 12:11:17 UT on 2020-01-15 (i.e., 20.9 min after the BAT trigger), and a series of 300 s R-band frames have been obtained. Observations are ongoing. No optical transient is detected in the Swift BAT's error circle from initial frames, down to a limiting magnitude of m(R) ~ 20.0, calibrated with the nearby SDSS field.
GCN 26776 table
GRB_name GRB200115A
GCN_number 26776
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 26776 SUBJECT: GRB 200115A: MITSuME Okayama optical upper limits DATE: 20/01/15 15:01:10 GMT FROM: Masafumi Niwano at Tokyo Institute of Tech M. Niwano, K. L. Murata, M. Oeda, K. Shiraishi, K. Iida, R. Adachi, F. Ogawa, S. Toma, R. Hosokawa, N. Nakamura, Y. Yatsu, and N. Kawai(TokyoTech) report on behalf of the MITSuME collaboration: We searched for the optical counterpart of GRB 200115A (S. B. Cenko et al.,GCN Circular #26771) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Okayama Astrophysical Observatory, Okayama, Japan. The observation started on 11:52:38.68 UT. We did not find any new point sources within the Swift/BAT circle (S. B. Cenko et al., GCN Circular #26771) in all three bands. We obtained the 5-sigma limits as follows. T0+[sec] MID-UT T-EXP[sec] 5-sigma limits ------------------------------------------------------------------------------------------------ 135 12:23:04.98 3060 g'>18.3, Rc>17.6, Ic>17.2 ------------------------------------------------------------------------------------------------ T0+ : Elapsed time after the burst T-EXP: Total Exposure time We used UCAC4 catalog for flux calibration. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. ,in prep; https://github.com/MNiwano/Eclair)
GCN 26780 table
GRB_name GRB200115A
GCN_number 26780
Detection_method Swift-BAT Det
ra 56.4530°
decl 5.6070°
Circular_text TITLE: GCN CIRCULAR NUMBER: 26780 SUBJECT: GRB 200115A: Swift-BAT refined analysis DATE: 20/01/16 00:41:51 GMT FROM: Scott Barthelmy at NASA/GSFC S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), K. Page (UL), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team): Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200115A (trigger #949361) (Page, et al., GCN Circ. 26771). The BAT ground-calculated position is RA, Dec = 56.453, 5.607 deg, which is RA(J2000) = 03h 45m 48.7s Dec(J2000) = +05d 36' 26.0" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 82%. The mask-weighted light curve starts before T-50 sec, picking up at T-30 sec, continued increasing until the peak at T+100 sec, a couple weak following peaks, and having weak and flat emission out past the end of data at T+240 sec. T90 (15-350 keV) is 158.4 +- 32.6 sec (estimated error including systematics). The time-averaged spectrum from T-40.29 to T+233.12 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.29 +- 0.24, and Epeak of 75.0 +- 17.5 keV (chi squared 40.88 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 1.0 +- 0.0 x 10^-5 erg/cm2 and the 1-sec peak flux measured from T+99.75 sec in the 15-150 keV band is 3.6 +- 0.3 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.77 +- 0.06 (chi squared 53.76 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/949361/BA/
GCN 26790 table
GRB_name GRB200115A
GCN_number 26790
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 26790 SUBJECT: GRB 200115A: Mondy optical afterglow candidate DATE: 20/01/16 18:22:00 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Pozanenko (IKI), A. Volnova (IKI), E. Klunko (ISTP), K. Kamyshnikov (HSE), N. Pankov (HSE), E. Mazaeva (IKI), S. Belkin (IKI) report on behalf of GRB IKI FuN: We observed the field of GRB 200115A (Cenko et al. GCN 26771) with AZT-33IK telescope of Sayan observatory (Mondy) starting on Jan. 15 (UT) 11:55:00, i.e. 4.6 minutes after GRB trigger. Within BAT ground-calculated position (Laha et al. GCN 26780) we detected the only one unidentified object at the coordinates (J2000) 03:45:46.58 +05:36:36 with uncertainty of 0.5 arcsec in both coordinates. The object is absent in SDSS DR12. At this time we cannot confirm variability of the object. We suggest the object is the optical afterglow of GRB 200115A. Preliminary photometry of the afterglow candidate is following. Date UT start t-T0 Filter Exp. OT Err. UL(3sigma) (mid, days) (s) 2020-01-15 11:55:00 0.02455 R 30*120 20.9 0.2 22.1 The photometry is based on the nearby SDSS DR12 stars SDSS R_Lupton J034551.63+053704.5 17.138 0.016 J034547.51+053555.6 18.214 0.029 J034543.70+053549.4 17.851 0.022
GCN 26792 table
GRB_name GRB200115A
GCN_number 26792
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 26792 SUBJECT: GRB 200115A: DDOTI/OAN optical observations report DATE: 20/01/16 20:59:20 GMT FROM: Emma Margarita Pereyra Talamantes at IA-UNAM Ensenada Rosa L. Becerra (UNAM), Margarita Pereyra (UNAM), Nat Butler (ASU), Alan M. Watson (UNAM), Eleonora Troja (GSFC/UMD), Diego Gonzalez (UNAM), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), and Tanner Wolfram (ASU), Simone Dichiara (GSFC/UMD) report: We observed the field of GRB 200115A detected by BAT/Swift (Cenko, GCN Circ. 26771), with the DDOTI/OAN wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir ( http://ddoti.astroscu.unam.mx) from 2020-01-16 02:01 to 2020-01-16 02:19 UTC (14.2 to 14.48 hours after the event). We observed a region of 6.8 degrees in RA by 10.2 degrees in declination centered on the peak of the Swift-BAT on-board calculated location 03:45:48.7 +05:36:26.0 J2000. This region contains about 70 square degrees. We obtained about 16 minutes total exposure across the region. We calibrated our images against the APASS catalog. Our 3-sigma limiting magnitude is w = 19.80 for the enhanced Swift-BAT error region (Laha et al., GCN Circ. 26780). Comparing to the USNO-B1 and SDSS DR9 catalogs we do not detect any uncataloged source to our 3-sigma limit. We thank the staff of the Observatorio Astronómico Nacional in San Pedro Mártir. -- *Dr. Margarita Pereyra * *FFTF, Schlumberger Foundation Alumnae* ---------------------------------------------------------------------------------------------------------------- *Catedrático Conacyt* *Instituto de Astronomía de la UNAM,* *Km. 107 Carretera Tijua**na-Ensenada, * *Ensenada Baja California, México. C.P. 22860* Oficina: 405 Skype: margarita-pereyra
GCN 26801 table
GRB_name GRB200115A
GCN_number 26801
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 26801 SUBJECT: GRB 200115A: AROMA-N Optical Observation DATE: 20/01/17 12:46:20 GMT FROM: Takanori Sakamoto at AGU M. Nakamura, T. Sakamoto (AGU) We observed the field of GRB 200115A detected by Swift (Cenko et al., GCN Circ. 26771) with the 14-inch AGU Robotic Optical Monitor for Astrophysical object - Narrow (AROMA-N) located at the Sagamihara campus of Aoyama Gakuin University. 60 images of 60 sec exposures were taken in the R filter starting from January 15 12:14:42 (UT) about 24 minutes after the trigger and stopped on January 15 13:27:55 (UT). We do not detect the optical afterglow both in the individual images and the stacked image. The estimated five sigma upper limit of the combined image (total exposure of 3600 sec) is ~18.1 mag using the USNO-B1 catalog.
GCN 26809 table
GRB_name GRB200115A
GCN_number 26809
Detection_method CALET
Circular_text TITLE: GCN CIRCULAR NUMBER: 26809 SUBJECT: GRB 200115A: CALET Gamma-Ray Burst Monitor detection DATE: 20/01/18 02:18:13 GMT FROM: Valentin Pal'shin at AGU T. Tamura (Kanagawa U), A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), Y. Asaoka, S. Torii (Waseda U), Y. Shimizu (Kanagawa U), N. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena), and the CALET collaboration: The very long GRB 200115A detected by Swift (Cenko et al., GCN Circ. 26771, Laha et al., GCN Circ.26780; https://gcn.gsfc.nasa.gov/other/200115A.gcn3) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 11:52:05.424 UTC on 15 January 2020. The burst signal was seen by all CGBM detectors. Because of a problem in one of the ground alert processing script, the GCN notice was not distributed automatically for this event. The burst light curve shows a multi-peaked structure which starts at T-206 sec, peaks at T-3 sec and ends at T+221 sec. The T90 and T50 durations measured by the SGM data are 347 +- 46 sec and 104 +- 29 sec (40-1000 keV), respectively. The ground processed light curve is available at http://cgbm.calet.jp/cgbm_trigger/ground/1263124124/ The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.
GCN 26818 table
GRB_name GRB200115A
GCN_number 26818
Detection_method correction
Circular_text TITLE: GCN CIRCULAR NUMBER: 26818 SUBJECT: GRB 200115A: Mondy optical observations and correction to GCN 26790 DATE: 20/01/19 17:33:26 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), K. Kamyshnikov (HSE), N. Pankov (HSE), E. Mazaeva (IKI), S. Belkin (IKI) report on behalf of GRB IKI FuN: We observed the field of GRB 200115A (Cenko et al., GCN 26771) with AZT-33IK telescope of Sayan observatory (Mondy) starting on Jan. 16 (UT) 12:30:28. Within BAT ground-calculated position (Laha et al. GCN 26780) we do not detect any unidentified objects in comparison with SDSS-DR2. We also not detected the afterglow candidate reported after our first epoch observation (Pozanenko et al., GCN 26790). We report the correction of R-magnitude of the afterglow candidate. The result presented below overrides previously reported (GCN 26790) R-magnitude. We apologize for the typo and possible inconvenience. Due to shallow upper limit in the second epoch observation we cannot confirm variability of the afterglow candidate. Date UT start t-T0 Filter Exp. OT Err. UL(3sigma) (mid, days) (s) 2020-01-15 11:55:00 0.02455 R 30*120 21.9 0.2 22.1 2020-01-16 12:30:28 1.05039 R 32*120 n/d n/d 21.6 The photometry is based on the nearby SDSS DR12 stars SDSS R_Lupton J034551.63+053704.5 17.138 0.016 J034547.51+053555.6 18.214 0.029 J034543.70+053549.4 17.851 0.022
GCN 26872 table
GRB_name GRB200115A
GCN_number 26872
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 26872 SUBJECT: GRB 200115A: Assy optical observations DATE: 20/01/24 17:57:09 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), V. Kim (AFIF), A. Pozanenko (IKI), M. Krugov (AFIF), E. Mazaeva (IKI), S. Belkin (IKI) report on behalf of larger GRB IKI FuN collaboration: We observed the field of GRB 200115A (Cenko et al., GCN 26771) with AZT-20 1.5 m telescope of Assy-Turgen observatory starting on Jan. 18 (UT) 16:55:27 in r'-filter. We do not detect the afterglow candidate (GCNs 26790, 26818) up to r'=22.8 (AB) and hence we consider the object found in BAT error circle (Cenko et al., GCN 26771) as the optical afterglow of GRB 200215A. Photometry of the field is following. Date UT start t-T0 Filter Exp. OT UL (3sigma) (mid, days) (s) 2019-10-18 16:55:27 3.22608 r' 13*180 n/d 22.8 The photometry is based on the nearby SDSS-DR12 stars.
GCN 27162 table
GRB_name GRB200115A
GCN_number 27162
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 27162 SUBJECT: GRB 200219С: Mondy and TSHAO optical observations DATE: 20/02/21 10:54:35 GMT FROM: Alexei Pozanenko at IKI, Moscow I. Reva (FAPHI), A. Pozanenko (IKI), M. Krugov (FAPHI), with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory A. Pozanenko (IKI), S. Belkin (IKI), E. Klunko (ISTP), I. Reva (FAPHI), M. Krugov (FAPHI), E. Mazaeva (IKI), A. Volnova (IKI) report on behalf of IKI-GRB-FuN: We observed the field of GRB 200219С (The Fermi GBM team, GCN 27145; Dirirsa et al., GCN 27151; Hamburg et al., GCN 27155) with AZT-33IK 1.5-m telescope of Sayan observatory (Mondy) starting on Feb. 20 (UT) 21:21:45 and with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory starting on Feb. 20 (UT) 23:17:45. Within enhanced XRT position of XRT afterglow (Burrows et al., GCN 27157) we detected an optical object in coordinates of (J2000) 17:30:02.275 +10:32:22.47 with uncertainities of 0.3 arcsec in both coordinates. Coordinates are consistent with possible host galaxy (Xu et al., GCN 27161) which is presented in Pan-STARRS catalaog. Preliminary photometry of the object is following. Date UT start t-T0 Filter Exp. OT Err UL(3sigma) telesope (mid, days) (s) 2020-02-20 21:21:45 0.90596 R 40*60 21.55 0.15 22.2 AZT-33IK 2020-02-20 23:17:45 0.99207 R 56*60 n/d n/d 21.3 Z-1000 Photometry is based on the USNO-B2.0 nearby stars. USNO-B1.0 R2 1005-0285285 17.74 1005-0285301 19.23 1005-0285213 19.99 The object is somewhat brighter than that presented in Pan-STARRS DR1, and we suggest this object is a candidate for the afterglow of GRB 200115A.