//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26944 SUBJECT: GRB 200130B: Fermi GBM Final Real-time Localization DATE: 20/01/30 10:10:17 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 09:59:56 UT on 30 Jan 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200130B (trigger 602071201.67246 / 200130417). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 137.5, Dec = -51.3 (J2000 degrees, equivalent to J2000 09h 09m, -51d 17'), with a statistical uncertainty of 3.5 degrees. The angle from the Fermi LAT boresight is 34.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200130417/quicklook/glg_skymap_all_bn200130417.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/bn200130417/quicklook/glg_healpix_all_bn200130417.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200130417/quicklook/glg_lc_medres34_bn200130417.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26945 SUBJECT: GRB 200130B: BALROG localization (Fermi Trigger 602071201 / GRB 200130417) DATE: 20/01/30 10:35:00 GMT FROM: Jochen Greiner at MPE,Garching F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 602071201 at 09:59:56 on 30 Jan. 2020 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60). The best-fit position (1 sigma statistical errors) is: RA(2000.0) = 138.5+/-1.4 deg Decl.(2000.0) = -56.9+/-0.9 deg We estimate an additional systematic error of 2 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB200130417/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB200130417/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB200130417/json //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26949 SUBJECT: IPN triangulation of GRB 200130B DATE: 20/01/31 12:15:53 GMT FROM: Dmitry Svinkin at Ioffe Institute K. Hurley, on behalf of the IPN, I. G. Mitrofanov, D. V. Golovin, A. S. Kozyrev, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team, A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, S. Barthelmy, J. Cummings, H. Krimm, and D. Palmer, on behalf of the Swift-BAT team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey GRB team, report: The long-duration GRB 200130B (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 26944; BALROG localization: Kunzweiler et al., GCN Circ. 26945) was detected by Fermi (GBM trigger 602071201), Konus-Wind, INTEGRAL (SPI-ACS), Mars-Odyssey (HEND), and Swift (BAT), at about 35997 s UT (09:59:57). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 134.742 (08h 58m 58s) -49.627 (-49d 37' 38") Corners: 133.618 (08h 54m 28s) -50.349 (-50d 20' 55") 134.000 (08h 56m 00s) -50.392 (-50d 23' 31") 135.836 (09h 03m 21s) -48.893 (-48d 53' 34") 135.462 (09h 01m 51s) -48.857 (-48d 51' 26") --------------------------------------------- The error box area is 1487 sq. arcmin, and its maximum dimension is 2.0 deg (the minimum one is 13 arcmin). The Sun distance was 112 deg. This box may be improved. The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final position (GCN Circ. 26944). A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB200130_T35999/IPN The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26950 SUBJECT: Konus-Wind observation of GRB 200130B DATE: 20/01/31 16:08:04 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, M. Ulanov, A. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, report: The long-duration GRB 200130B (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 26944; BALROG localization: Kunzweiler et al., GCN Circ. 26945; IPN triangulation: Hurley et al., GCN Circ. 26949) triggered Konus-Wind at T0=35999.282 s UT (09:59:59.282). The burst light curve shows an initial intense pulse which starts at ~T0-0.3 s followed by a weaker emission up to ~12 s. The emission is seen up to ~1 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB200130_T35999/ As observed by Konus-Wind, the burst had a fluence of 1.10(-0.09,+0.11)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+0.284 s, of 6.59(-1.21,+1.34)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+16.640 s) is best fit in the 20 keV - 1 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.88(-0.19,+0.24), the high energy photon index beta = -3.58(-6.42,+0.64), the peak energy Ep = 90(-6,+6) keV (chi2 = 55/44 dof). The spectrum near the maximum count rate (measured from T0+0.256 to T0+8.448 s) is best fit in the 20 keV - 1 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.85(-0.20,+0.26), the high energy photon index beta = -4.01(-5.99,+0.98), the peak energy Ep = 91(-6,+6) keV (chi2 = 44/44 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.