GRB200109A

This page lists all entries on GRB200109A in GRBweb

Summary Fermi GBM IPN Swift GCN 26677 GCN 26678 GCN 26681 GCN 26682 GCN 26689 GCN 26690 GCN 26692 GCN 26699 GCN 26710

Summary table
Variable Value Source
GRB_name_Fermi GRB200109074
T0 1:45:51 UTC GCN_circulars,Fermi GBM final loc
ra 307.1249° Swift
decl 52.9936° Swift
pos_error 1.81e-04° Swift
T90 40.96 s Fermi_GBM
T90_error 4.615 s Fermi_GBM
T90_start 1:45:51.894 UTC Fermi_GBM
fluence 2.31e-06 erg/cm² Fermi_GBM
fluence_error 3.36e-08 erg/cm² Fermi_GBM
T100 137.0 s
GBM_located False
mjd 58857.07350694444 GCN_circulars,Fermi GBM final loc
Fermi GBM table
GRB_name_Fermi GRB200109074
trigger_name bn200109074
ra 307.1258°
decl 52.9933°
pos_error 8.37e+00°
datum 2020-01-09
t_trigger 1:45:51.894 UTC
T90 40.96 s
T90_error 4.615 s
T90_start 1:45:51.894 UTC
fluence 2.31e-06 erg/cm²
fluence_error 3.36e-08 erg/cm²
flux_1024 2.29e+00 erg/cm²/s
flux_1024_error 1.86e-01 erg/cm²/s
flux_1024_time -7.04e-01 erg/cm²/s
flux_64 3.58e+00 erg/cm²/s
flux_64_error 8.81e-01 erg/cm²/s
IPN table
GRB_name GRB200109A
ra 307.1708°
decl 53.0000°
pos_error 5.00e-02°
Swift table
GRB_name GRB200109A
t_trigger 1:46:16 UTC
ra 307.1249°
decl 52.9936°
pos_error 1.81e-04°
T90 112.0 s
fluence 2.10e-06 erg/cm²
GCN 26677 table
GRB_name GRB200109A
GCN_number 26677
Detection_method Fermi GBM final loc
t_trigger 1:45:51 UTC
ra 284.7000°
decl 68.9000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 26677 SUBJECT: GRB 200109A: Fermi GBM Final Real-time Localization DATE: 20/01/09 01:56:09 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 01:45:51 UT on 9 Jan 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200109A (trigger 600227156.894404 / 200109074). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 284.7, Dec = 68.9 (J2000 degrees, equivalent to J2000 18h 58m, 68d 54'), with a statistical uncertainty of 10.4 degrees. The angle from the Fermi LAT boresight is 40.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200109074/quicklook/glg_skymap_all_bn200109074.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200109074/quicklook/glg_healpix_all_bn200109074.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200109074/quicklook/glg_lc_medres34_bn200109074.gif
GCN 26678 table
GRB_name GRB200109A
GCN_number 26678
Detection_method Swift Det
t_trigger 1:46:16 UTC
ra 307.1710°
decl 53.0030°
Circular_text TITLE: GCN CIRCULAR NUMBER: 26678 SUBJECT: GRB 200109A: Swift detection of a burst DATE: 20/01/09 02:00:28 GMT FROM: David Palmer at LANL A. Melandri (INAF-OAB), M. G. Bernardini (INAF-OAB), P. D'Avanzo (INAF-OAB), J.D. Gropp (PSU), N. J. Klingler (PSU), S Laha (GSFC/UMBC/CRESST), D. M. Palmer (LANL), M. H. Siegel (PSU), K. K. Simpson (PSU) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team: At 01:46:16 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200109A (trigger=948361). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 307.171, +53.003 which is RA(J2000) = 20h 28m 41s Dec(J2000) = +53d 00' 12" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of 70 sec. The peak count rate was ~1600 counts/sec (15-350 keV), at ~2 sec after the trigger. The XRT began observing the field at 01:47:59.1 UT, 102.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 307.1258, 52.9932 which is equivalent to: RA(J2000) = 20h 28m 30.19s Dec(J2000) = +52d 59' 35.5" with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 104 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 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 3.98 x 10^21 cm^-2 (Willingale et al. 2013). The initial flux in the 2.5 s image was 1.12e-09 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 109 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the sub-image. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.29. 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/)
GCN 26681 table
GRB_name GRB200109A
GCN_number 26681
Detection_method Swift-XRT Det
ra 307.1246°
decl 52.9936°
Circular_text TITLE: GCN CIRCULAR NUMBER: 26681 SUBJECT: GRB 200109A: Enhanced Swift-XRT position DATE: 20/01/09 10:09:58 GMT FROM: Phil Evans at U of Leicester M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team. Using 406 s of XRT Photon Counting mode data and 1 UVOT images for GRB 200109A, 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 = 307.12462, +52.99363 which is equivalent to: RA (J2000): 20h 28m 29.91s Dec (J2000): +52d 59' 37.1" with an uncertainty of 1.7 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.
GCN 26682 table
GRB_name GRB200109A
GCN_number 26682
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 26682 SUBJECT: GRB 200109A: Swift-XRT refined Analysis DATE: 20/01/09 10:55:47 GMT FROM: Phil Evans at U of Leicester V. D'Elia (ASDC), D.N. Burrows (PSU), J. D. Gropp (PSU), A. Tohuvavohu (U. Toronto), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester), A. D'Ai (INAF-IASFPA) and A. Melandri report on behalf of the Swift-XRT team: We have analysed 6.3 ks of XRT data for GRB 200109A (Melandri et al. GCN Circ. 26678), from 91 s to 24.1 ks after the BAT trigger. The data comprise 48 s in Windowed Timing (WT) mode (the first 7 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 26681). The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=1.9 (+/-0.3). At T+216 s the decay steepens to an alpha of 8.0 (+0.0, -3.2) before breaking again at T+262 s to a final decay with index alpha=1.50 (+0.28, -0.38). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.70 (+0.32, -0.30). The best-fitting absorption column is 6.9 (+2.7, -2.2) x 10^21 cm^-2, in excess of the Galactic value of 4.0 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.2 x 10^-11 (7.6 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 6.9 (+2.7, -2.2) x 10^21 cm^-2 Galactic foreground: 4.0 x 10^21 cm^-2 Excess significance: 2.2 sigma Photon index: 1.70 (+0.32, -0.30) If the light curve continues to decay with a power-law decay index of 1.50, the count rate at T+24 hours will be 1.3 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.0 x 10^-15 (1.0 x 10^-14) erg cm^-2 s^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00948361. This circular is an official product of the Swift-XRT team.
GCN 26689 table
GRB_name GRB200109A
GCN_number 26689
Detection_method Fermi GBM Det
t_trigger 1:45:51.890 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 26689 SUBJECT: GRB 200109A: Fermi GBM observation DATE: 20/01/09 19:22:09 GMT FROM: Rachel Hamburg at UAH R. Hamburg (UAH) and C. Meegan (UAH) report on behalf of the Fermi GBM Team: "At 01:45:51.89 UT on 9 January 2020, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 200109A (trigger 600227156 / 200109074), which also triggered the Swift/BAT approximately 25 s later (Melandri et al. 2019, GCN 26678). The Fermi GBM Final Real-time Localization (GCN 26677) is consistent with the Swift position. The angle from the Fermi LAT boresight at the GBM trigger time is 57 degrees. The GBM light curve shows a complex structure with a duration (T90) of about 41 s (50-300 keV). The time-averaged spectrum from T0-0.8 s to T0+41.2 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.98 +/- 0.08 and the cutoff energy, parameterized as Epeak, is 449 +/- 109 keV. The event fluence (10-1000 keV) in this time interval is (6.9 +/- 0.6)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0-0.7 s in the 10-1000 keV band is 2.3 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN 26690 table
GRB_name GRB200109A
GCN_number 26690
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 26690 SUBJECT: GRB 200109A: Swift/UVOT Upper Limits DATE: 20/01/09 19:26:41 GMT FROM: Kira Simpson at PSU GRB 200109A: Swift/UVOT Upper Limits K. K. Simpson (PSU) and A. Melandri (INAF-OAB) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 200109A 110 s after the BAT trigger (Melandri et al., GCN Circ. 26678). No optical afterglow consistent with the XRT position (Melandri et al. GCN Circ. 26678) 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 110 259 147 >20.5 u_FC 268 518 246 >19.0 white 110 1023 295 >20.9 u 268 518 246 >19.0 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.29 in the direction of the burst (Schlegel et al. 1998).
GCN 26692 table
GRB_name GRB200109A
GCN_number 26692
Detection_method Swift-BAT Det
ra 307.1160°
decl 52.9880°
Circular_text TITLE: GCN CIRCULAR NUMBER: 26692 SUBJECT: GRB 200109A: Swift-BAT refined analysis DATE: 20/01/09 21:24:27 GMT FROM: Amy Lien at GSFC H. A. Krimm (NSF), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), A. Melandri (INAF-OAB), 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-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200109A (trigger #948361) (Melandri et al., GCN Circ. 26678). The BAT ground-calculated position is RA, Dec = 307.116, 52.988 deg which is RA(J2000) = 20h 28m 27.7s Dec(J2000) = +52d 59' 17.7" with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows a weak structure with several overlapping pulses that start at ~T-30 s to ~T+20 s, followed by a weaker tail emission that lasts till ~T+100 s. T90 (15-350 keV) is 112.0 +- 32.0 sec (estimated error including systematics). The time-averaged spectrum from T-31.45 to T+112.55 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.31 +- 0.14. The fluence in the 15-150 keV band is 2.1 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+8.05 sec in the 15-150 keV band is 0.7 +- 0.2 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/948361/BA/
GCN 26699 table
GRB_name GRB200109A
GCN_number 26699
Detection_method Swift-XRT Other
ra 42.4854°
decl -18.0881°
Circular_text TITLE: GCN CIRCULAR NUMBER: 26699 SUBJECT: ANTARES 200108A: No detection by Swift-XRT DATE: 20/01/10 16:19:42 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester), A. Tohuvavohu (U. Toronto), J.A. Kennea (PSU) and S.B. Cenko (GSFC) report on behalf of the Swift/XRT team: Swift performed a series of 19 observations tiling the sky area of the Fermi-LAT / ANTARES coincident event ANTARES 200108A (Turley et al., GCN Circ. 26674). The observations were centred on RA=02h 49m 56.5s, Dec=-18d 05' 17", with a radius of ~50', and were carried out between 22:53:41 UT on Jan 8 until 00:37:14 UT on Jan 9; the detection of GRB 200109A subsequently interrupted the campaign. We gathered between 30 s and 150 s of exposure per tile, with the typical exposure being 110 s. No X-ray sources were found, with a typical upper limit of 0.06 ct/sec (0.3-10 keV). Assuming a standard AGN spectrum (NH=3e20, Gamma=1.7) this corresponds to a 0.3-10 keV observed flux of 2.6 x 10^-12 erg/cm^-2 s^-1.
GCN 26710 table
GRB_name GRB200109A
GCN_number 26710
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 26710 SUBJECT: GRB 200109A: Insight-HXMT/HE detection DATE: 20/01/12 03:04:57 GMT FROM: Shuo Xiao at IHEP S. Xiao, Y. F. Du, Y. G. Zheng, C. Cai, Q. Luo, Q. B. Yi, Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team: At 2020-01-09T01:45:51.89 (T0), Insight-HXMT/HE detected GRB 200109A (trigger ID: HEB200109073) in a routine search of the data, which also triggered Fermi/GBM (GCN #26689), and Swift (GCN #26678). The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 36.405 s measured from T0-0.650 s. The 1-ms peak rate, measured from T0+ 9.281 s, is 595 cnts/sec. The total counts from this burst is 6014 counts. URL_LC: http://www.hxmt.org/images/GRB/HEB200109073_lc.jpg All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.