GRB170209A

This page lists all entries on GRB170209A in GRBweb

Summary Fermi GBM IPN GCN 20652 GCN 20656 GCN 20658 GCN 20659 GCN 20662 GCN 20670 GCN 20680

Summary table
Variable Value Source
GRB_name_Fermi GRB170209048
T0 1:08:38 UTC GCN_circulars,IPN Triangulation
ra 107.1333° IPN
decl -46.8000° IPN
pos_error 2.50e+00° IPN
T90 39.677 s Fermi_GBM
T90_error 2.064 s Fermi_GBM
T90_start 1:08:38.080 UTC Fermi_GBM
fluence 1.07e-05 erg/cm² Fermi_GBM
fluence_error 7.72e-08 erg/cm² Fermi_GBM
T100 39.757 s
GBM_located False
mjd 57793.04766203704 GCN_circulars,IPN Triangulation
Fermi GBM table
GRB_name_Fermi GRB170209048
trigger_name bn170209048
ra 110.7792°
decl -52.2464°
pos_error 3.23e+00°
datum 2017-02-09
t_trigger 1:08:38.077 UTC
T90 39.677 s
T90_error 2.064 s
T90_start 1:08:38.080 UTC
fluence 1.07e-05 erg/cm²
fluence_error 7.72e-08 erg/cm²
flux_1024 1.24e+01 erg/cm²/s
flux_1024_error 4.37e-01 erg/cm²/s
flux_1024_time 1.92e+00 erg/cm²/s
flux_64 1.63e+01 erg/cm²/s
flux_64_error 1.88e+00 erg/cm²/s
IPN table
GRB_name GRB170209A
ra 107.1333°
decl -46.8000°
pos_error 2.50e+00°
GCN 20652 table
GRB_name GRB170209A
GCN_number 20652
Detection_method Fermi GBM Det
t_trigger 1:08:38.080 UTC
ra 113.4000°
decl -49.6400°
Circular_text TITLE: GCN CIRCULAR NUMBER: 20652 SUBJECT: GRB 170209A: Fermi GBM Detection DATE: 17/02/09 22:26:43 GMT FROM: Oliver J Roberts at USRA/NASA O.J. Roberts (USRA/NASA) and C. Meegan (UAH) report on behalf of the Fermi GBM Team: "At 01:08:38.08 UT on the 9th of February 2017, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 170209A (trigger 508295323 / 170209048), for which MASTER reported an OT in follow-up observations of the reported GBM location region (Podesta et al. 2017, GCN 20650). The on-ground calculated location using the GBM trigger data is, RA = 113.40, DEC = -49.64 (J2000 degrees), equivalent to J2000 7h 33m, -49d 38', with an uncertainty of 3.22 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a core-plus-tail model, with 90% of GRBs having a 3.7 deg. error and a small tail suffering a larger than 10 deg. systematic error [Connaughton et al. 2015, ApJS, 216, 32]). The angle from the Fermi LAT boresight at the GBM trigger time is 120 degrees. The GBM light curve consists of a long GRB with two bright episodes of emission over a duration (T90) of about 40 s (50-300 keV). The time-averaged spectrum from T0+0 s to T0+40.0 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.95 +/- 0.07 and the cutoff energy, parameterized as Epeak is 132 +/- 9 keV. The event fluence (10-1000 keV) in this time interval is (9.34 +/- 0.37)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1.9 s in the 10-1000 keV band is 12.6 +/- 0.4 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN 20656 table
GRB_name GRB170209A
GCN_number 20656
Detection_method IPN Triangulation
t_trigger 1:08:38 UTC
ra 110.6860°
decl -51.9590°
Circular_text TITLE: GCN CIRCULAR NUMBER: 20656 SUBJECT: IPN Triangulation of GRB 170209A DATE: 17/02/09 23:58:53 GMT FROM: Anna Kozlova at Ioffe Institute K. Hurley, on behalf of the IPN, I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin, on behalf of the HEND-Odyssey GRB team, A. Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, V. Connaughton, M. S. Briggs, C. Meegan, V. Pelassa, and A. Goldstein, 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, 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 170209A (Fermi GBM Detection: Roberts & Meegan, GCN Circ. 20652) has been detected by Fermi (GBM), Konus-Wind, INTEGRAL (SPI-ACS), and Mars-Odyssey (HEND), so far, at about 4118 s UT (01:08:38). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 110.686 (07h 22m 45s) -51.959 (-51d 57' 34") Corners: 111.873 (07h 27m 29s) -55.694 (-55d 41' 38") 111.366 (07h 25m 28s) -55.308 (-55d 18' 29") 109.742 (07h 18m 58s) -48.166 (-48d 09' 58") 110.149 (07h 20m 36s) -48.575 (-48d 34' 30") --------------------------------------------- The error box area is 1.66 sq. deg, and its maximum dimension is 7.64 deg (the minimum one is 13.1 arcmin). The Sun distance was 105 deg. This box may be improved. The distance between the narrowest annulus (GBM-HEND annulus with 3 sigma half width of 0.109 deg) center line and the optical transient J072307.30-521446.6 (Podesta et al., GCN Circ. 20650) is 1 arcmin, supporting the association of the transient and the GRB. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB170209_T04120/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN 20658 table
GRB_name GRB170209A
GCN_number 20658
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 20658 SUBJECT: GRB 170209A: Swift ToO observations DATE: 17/02/10 14:42:18 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a ToO observation of the IPN GRB 170209A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/ToO_GRBs/00020739 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. These are not necessarily related to the IPN event. Any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 20659 table
GRB_name GRB170209A
GCN_number 20659
Detection_method Konus-Wind Det
t_trigger 1:08:40.061 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 20659 SUBJECT: Konus-Wind observation of GRB 170209A DATE: 17/02/10 15:04:10 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik, M. Ulanov, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report: The long-duration GRB 170209A (Fermi-GBM detection: Roberts and Meegan, GCN Circ. 20652; IPN triangulation: Hurley et al., GCN Circ. 20656) triggered Konus-Wind at T0=4120.061 s UT (01:08:40.061). The burst light curve shows two multipeaked episodes started at ~T0-2 s with a total duration of ~40 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/GRB170209_T04120/ As observed by Konus-Wind, the burst had a fluence of 8.35(-0.69,+0.76)x10^-6 erg/cm2, and a 64-ms peak flux, measured from T0+1.904 s, of 2.75(-0.80,+0.84)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+41.216 s) is best fit in the 20 keV - 2 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.59(-0.30,+0.35) and Ep = 126(-13,+18) keV (chi2 = 68/60 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.6 (chi2 = 68/59 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 - 2 MeV range by a power law with exponential cutoff model: with alpha = -0.92(-0.31,+0.35) and Ep = 164(-28,+47) keV (chi2 = 60/60 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.2 (chi2 = 60/59 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN 20662 table
GRB_name GRB170209A
GCN_number 20662
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 20662 SUBJECT: GRB 170209A: Swift-XRT observations DATE: 17/02/11 02:09:50 GMT FROM: Aaron Cholden-Brown at PSU/Swift B. Mingo (U. Leicester), A.P. Beardmore (U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), D.N. Burrows (PSU), A. Cholden-Brown (PSU), S. J. LaPorte (PSU) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the IPN-detected burst GRB 170209A (Roberts et al. GCN Circ. 20652), collecting 5.0 ks of Photon Counting (PC) mode data between T0+134.5 ks and T0+153.7 ks. No X-ray sources have been detected consistent with being within 16 arcsec of the MASTER-OAFA position. The 3-sigma upper limit in the field ranges from ~0.002 to ~0.005 ct s^-1, corresponding to a 0.3-10 keV observed flux of 8.6e-14 to 2.0e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum). The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at http://www.swift.ac.uk/ToO_GRBs/00020739. This circular is an official product of the Swift-XRT team.
GCN 20670 table
GRB_name GRB170209A
GCN_number 20670
Detection_method AstroSat CZTI
Circular_text TITLE: GCN CIRCULAR NUMBER: 20670 SUBJECT: GRB 170209A: AstroSat CZTI detection DATE: 17/02/13 20:10:05 GMT FROM: Vidushi Sharma at IUCAA V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IITB), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data showed a clear detection of GRB 170209A (Fermi GBM detection: O.J. Roberts et al., GCN Circ. 20652) in the 40-200 keV energy range. The light curve showed multiple peaks emission. The first emission peak occurred at 01:08:40.08 UT, 2 s after the Fermi trigger and a second group of emission peaked at ~34 s after the trigger. An interval of ~9 s between these two showed no detectable emission. The measured peak count rate was 245.1 counts/s above the background in combined data of four quadrants, with a total 1453.0 counts. The local mean background count rate was 343.9 counts/s. Using cumulative rates, we measured a T90 of 40.4 s. It was clearly detected in the CsI anticoincidence detector (Veto) also as bright detection in the 100-500 keV energy range. 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.
GCN 20680 table
GRB_name GRB170209A
GCN_number 20680
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 20680 SUBJECT: GRB 170209A: GROND confirmation of MASTER afterglow DATE: 17/02/15 16:29:28 GMT FROM: Jochen Greiner at MPI P. Schady, J. Greiner (both MPE Garching), and S. Steinmassl (TU Munich), report: We observed the field of the optical transient reported by MASTER (Podesta et al. 2017, GCN #20650) of GRB 170209A (Fermi/GBM trigger 508295323; Roberts & Meegan 2017, GCN #20652) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile). Observations started at 03:16 UT on 2017-02-10, 26 hrs after the GRB trigger, resulting in 36 min of total exposures in g'r'i'z' and 30 min in JHK. They were performed at an average seeing of 2.3" and at an airmass of 1.1. A second epoch observation was started at 03:03 UT on 2017-02-15, around 6 days after the GRB trigger, resulting in 72 min of total exposures in g'r'i'z' and 60 min in JHK. Seeing conditions were better, around 1.3". We detect two sources close to the MASTER position: the fainter one, to the North-West, has faded by more than 1.2 mag, while the second source (to the South-West) stayed constant within the errors. The position of the fading object is RA (2000.0) = 07:23:07.19 Decl.(2000.0) = -52:14:45.5 with an error of +-0.3", and about 1.5 arcsec from the MASTER position. We find the following magnitudes of the fading object: epoch 1 epoch 2 g' > 23.5 mag > 24.6 mag r' = 23.4 +- 0.1 mag > 24.6 mag i' = 23.3 +- 0.3 mag > 24.2 mag z' = 23.1 +- 0.3 mag > 24.2 mag J > 21.3 mag > 21.7 mag H > 21.0 mag > 21.3 mag K > 19.3 mag > 19.7 mag The close match with the MASTER object, the fading and the powerlaw-like r'i'z colors confirm the nature of this object as the afterglow of GRB 170209A, as suggested also by Hurley et al. 2017, GCN #20656 based purely on the positional coincidence. Given magnitudes are calibrated against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E(B-V)= 0.12 mag in the direction of the burst (Schlafly & Finkbeiner 2011). We thank the support astronomer, S. Ciceri, for the support of the observations.