GRB160816A

This page lists all entries on GRB160816A in GRBweb

Summary Fermi GBM IPN Fermi LAT GCN 19802 GCN 19803 GCN 19805 GCN 19806 GCN 19808 GCN 19809 GCN 19810 GCN 19814 GCN 19815 GCN 19818 GCN 19819 GCN 19820 GCN 19821 GCN 19824 GCN 19825 GCN 19829 GCN 19881 GCN 19892

Summary table
Variable Value Source
GRB_name_Fermi GRB160816730
T0 17:30:57.970 UTC Fermi_LAT
ra 322.4108° Fermi_LAT
decl 37.1330° Fermi_LAT
pos_error 2.78e-04° Fermi_LAT
T90 11.072 s Fermi_GBM
T90_error 0.091 s Fermi_GBM
T90_start 17:30:58.359 UTC Fermi_GBM
fluence 3.33e-05 erg/cm² Fermi_GBM
fluence_error 1.71e-08 erg/cm² Fermi_GBM
T100 11.461 s
GBM_located False
mjd 57616.72983761574 Fermi_LAT
Fermi GBM table
GRB_name_Fermi GRB160816730
trigger_name bn160816730
ra 322.4108°
decl 37.1325°
pos_error 2.49e+00°
datum 2016-08-16
t_trigger 17:30:57.975 UTC
T90 11.072 s
T90_error 0.091 s
T90_start 17:30:58.359 UTC
fluence 3.33e-05 erg/cm²
fluence_error 1.71e-08 erg/cm²
flux_1024 3.91e+01 erg/cm²/s
flux_1024_error 4.09e-01 erg/cm²/s
flux_1024_time 7.55e+00 erg/cm²/s
flux_64 6.37e+01 erg/cm²/s
flux_64_error 1.95e+00 erg/cm²/s
IPN table
GRB_name GRB160816A
ra 289.6792°
decl -35.6333°
pos_error 1.33e-01°
Fermi LAT table
GRB_name_Fermi GRB160816730
GRB_name GRB160816A
MET 493061461.975
datum 2016-08-16
t_trigger 17:30:57.970 UTC
ra 322.4108°
decl 37.1330°
pos_error 2.78e-04°
GCN 19802 table
GRB_name GRB160816A
GCN_number 19802
Detection_method Fermi LAT Det
t_trigger 17:30:58 UTC
ra 322.4500°
decl 37.1600°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19802 SUBJECT: GRB 160816A: Fermi-LAT detection DATE: 16/08/16 23:15:28 GMT FROM: Judith Racusin at GSFC J. L. Racusin (NASA/GSFC), F. Dirirsa (U. Johannesburg), F. Longo (University and INFN, Trieste), J. McEnery (NASA/GSFC), and G. Vianello (Stanford) report on behalf of the Fermi-LAT team: At 17:30:58 on August 16, 2016 Fermi-LAT detected high-energy emission from GRB 160816A, which was also detected by Fermi-GBM (trigger 493061460 / 160816730). The best LAT on-ground location is found to be: RA, Dec = 322.45, 37.16 (J2000) with an error radius of 0.13 deg (90% containment, statistical error only). This was 35 deg from the LAT boresight at the time of the trigger and triggered an autonomous repoint of the spacecraft. The data from the Fermi-LAT show a significant increase in the event rate that is spatially and temporally correlated with the trigger with high significance. The highest-energy photon is a 9.5 GeV event which is observed ~1100 seconds after the GBM trigger. A Swift ToO request has been approved for this burst. The Fermi-LAT point of contact for this burst is Francesco Longo (francesco.longo@trieste.infn.it). The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
GCN 19803 table
GRB_name GRB160816A
GCN_number 19803
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 19803 SUBJECT: GRB 160816A: Swift ToO observations DATE: 16/08/17 00:35:15 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 Fermi/LAT GRB 160816A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/ToO_GRBs/00020685 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 Fermi/LAT 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 19805 table
GRB_name GRB160816A
GCN_number 19805
Detection_method Optical
ra 322.4500°
decl 37.1600°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19805 SUBJECT: GRB 160816A: MASTER inspection DATE: 16/08/17 05:44:51 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, P.Balanutsa, A.Kuznetsov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute R. Rebolo, M. Serra, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias K.Ivanov, O.Gres, N.M.Budnev, S.Yazev, Irkutsk State University D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory A. Tlatov, V.Senik, D. Dormidontov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk Hugo Levato, Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) R.Podesta, C.Mallamaci, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) MASTER-IAC robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Teide observatory was pointed to the Fermi LAT GRB160816A 924 sec after notice time at 2016-08-16 22:57:12 UT (NOTICE_DATE:Tue 16 Aug 16 22:42:36 UT) and 19665 sec after the trigger time(the delay in 15min was from the inspection of previous FermiGBM alert and late notice time). On our first 180s exposures we haven't found optical transient within LAT error-box (RA, Dec = 322.45, 37.16 (J2000) r=0.13). There is a disc galaxy (unknown in NED) inside LAT error-box at the position 21h 29m 23.16s +37d 05m 54.9s - possible host galaxy for GRB. The 5-sigma upper limit has been about 19.7 mag The message may be cited.
GCN 19806 table
GRB_name GRB160816A
GCN_number 19806
Detection_method Swift-XRT Other
ra 322.4108°
decl 37.1324°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19806 SUBJECT: GRB 160816A: Swift-XRT afterglow detection DATE: 16/08/17 07:10:35 GMT FROM: Phil Evans at U of Leicester J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A. D'Ai (INAF-IASFPA), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the Fermi/LAT-detected burst GRB 160816A (Racusin et al. GCN Circ. 19802), collecting 1.6 ks of Photon Counting (PC) mode data between T0+25.2 ks and T0+31.8 ks. An uncatalogued X-ray source is detected and is above the RASS limit, and is therefore likely the GRB afterglow. The position of this source is RA, Dec=322.4108, +37.1324 which is equivalent to: RA (J2000): 21:29:38.59 Dec(J2000): +37:07:56.6 with an uncertainty of 3.8 arcsec (radius, 90% confidence). This position is 3.8 arcmin from the Fermi/LAT position. The light curve is consistent with a constant source of mean count rate 7.8e-02 ct/sec. A power-law fit gives an index of 1.5 (+1.8, -1.7). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.7 (+0.6, -0.3). The best-fitting absorption column is 2.97 (+3.55, -0.16) x 10^21 cm^-2, consistent with the Galactic value of 2.8 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 4.5 x 10^-11 (5.8 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 2.97 (+3.55, -0.16) x 10^21 cm^-2 Galactic foreground: 2.8 x 10^21 cm^-2 Excess significance: <1.6 sigma Photon index: 1.7 (+0.6, -0.3) The results of the XRT-team automatic analysis of the likely afterglow are at http://www.swift.ac.uk/ToO_GRBs/00020685/index_1.php. The results of the full analysis of the XRT observations are available at http://www.swift.ac.uk/ToO_GRBs/00020685. This circular is an official product of the Swift-XRT team.
GCN 19808 table
GRB_name GRB160816A
GCN_number 19808
Detection_method Optical
ra 322.4108°
decl 37.1330°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19808 SUBJECT: GRB 160816A: LCOGT-FTN optical candidate DATE: 16/08/17 08:17:39 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), S. Kobayashi, I.A. Steele (LJMU), C.G. Mundell (U. Bath), A. Gomboc (U. Nova Gorica) on behalf of a large collaboration report: The 2-m LCOGT Faulkes Telescope North began observing Fermi-LAT GRB 160816A (Racusin et al., GCN 19802) on August 17, 07:23:08 UT (13.9 hours after the burst trigger). Inside the Swift-XRT error circle of the X-ray afterglow candidate (Kennea et al., GCN 19806) we find an uncatalogued source at the following position: RA(J2000)= 21:29:38.58 Dec(J2000)= +37:07:58.7 with an uncertainty of 1.0 arcsec and r~21.0 +- 0.2 mag (AB).
GCN 19809 table
GRB_name GRB160816A
GCN_number 19809
Detection_method Swift-XRT Other
ra 322.4106°
decl 37.1330°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19809 SUBJECT: GRB 160816A: RATIR Optical and NIR Observations DATE: 16/08/17 09:26:10 GMT FROM: Eleonora Troja at GSFC Eleonora Troja (GSFC), 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 (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM), Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report: We observed the field of the Fermi GRB 160816A (Mailyan, et al., GCN 19804; Racusin et al. 19802) 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 2017-08-17 06:15 to 07:44 UTC (12.8 to 14.2 hours after the GBM trigger), obtaining a total of 0.71 hours exposure in the r and i bands and 0.30 hours exposure in the Z, Y, J, and H bands. For a source within the Swift/XRT error circle (Kennea et al., GCN 19806), in comparison with the USNO-B1 and 2MASS catalogs, we obtain the following detections: r = 21.05 +/- 0.05 i = 20.79 +/- 0.04 Z = 20.61 +/- 0.07 Y = 20.32 +/- 0.08 J = 20.16 +/- 0.09 H = 19.95 +/- 0.10 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. The source position is RA,Dec(J2000)=21:29:38.549,+37:07:58.79 with an uncertainty of 0.5 arcsec. Our position is consistent with the candidate reported from Guidorzi, et al. (GCN 19808). We thank the staff of the Observatorio Astronómico Nacional in San Pedro Mártir. Further observations are on-going.
GCN 19810 table
GRB_name GRB160816A
GCN_number 19810
Detection_method Konus-Wind Det
t_trigger 17:31:01.653 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 19810 SUBJECT: Konus-Wind observation of GRB 160816A DATE: 16/08/17 13:32:53 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik, M. Ulanov, A. Tsvetkova, A. Lysenko, A. Kozlova, and T. Cline on behalf of the Konus-Wind team, report: The long-duration, very intense, GRB 160816A (Fermi LAT detection: Racusin et al., GCN Circ. 19802; Fermi GBM observation: Mailyan and Meegan, GCN Circ. 19804) triggered Konus-Wind at T0=63061.653 s UT (17:31:01.653). The burst light curve shows a multipeaked structure started at ~T0 with a total duration of ~14 s. The emission is seen up to 3 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB160816_T63061/ As observed by Konus-Wind, the burst had a fluence of 3.16(-0.10,+0.11)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+8.032 s, of 1.63(-0.16,+0.16)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+19.712 s) is best fit in the 20 keV - 3 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.81(-0.06,+0.06) and Ep = 239(-11,+12) keV (chi2 = 51/68 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -3.0 (chi2 = 49/67 dof) The spectrum near the maximum count rate (measured from T0+2.304 to T0+8.448 s) is best fit in the 20 keV - 3 MeV range by a power law with exponential cutoff model with alpha = -0.89(-0.08,+0.09) and Ep = 244(-18,+20) keV (chi2 = 66/68 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -3.2 (chi2 = 66/67 dof) All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN 19814 table
GRB_name GRB160816A
GCN_number 19814
Detection_method IPN Triangulation
ra 63.3328°
decl 24.0531°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19814 SUBJECT: GRB 160816A: IPN annulus DATE: 16/08/17 18:17:28 GMT FROM: Kevin Hurley at UCBerkeley/SSL 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, W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr, on behalf of the GRS-Odyssey GRB team, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova, D. Svinkin, and T. Cline, on behalf of the Konus-Wind team, and V. Connaughton, M. S. Briggs, C. Meegan, V. Pelassa, and A. Goldstein, on behalf of the Fermi GBM team, report: GRB 160816A has been observed by Konus-Wind (GCN 19810), Fermi GBM and LAT (GCN 19804, GCN 19802), and Mars Odyssey-HEND, so far. We have triangulated it to a preliminary annulus centered at RA, Dec (2000)=63.3328, 24.0531 degrees, with radius 83.8027 +/- 0.1087 degrees (3 sigma). The center line of the annulus passes 0.0086 degrees from the Swift XRT source (GCN 19806), supporting the conclusion that this source is the GRB afterglow. A map has been posted at ssl.berkeley.edu/ipn3/160816A.
GCN 19815 table
GRB_name GRB160816A
GCN_number 19815
Detection_method Swift-UVOT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 19815 SUBJECT: GRB 160816A: Swift/UVOT Detection DATE: 16/08/17 19:29:32 GMT FROM: Paul Kuin at MSSL Paul Kuin (UCL/MSSL), D. Malesani (DARK/NBI and DTU Space), Frank Marshall (GSFC) and Lea Hagen (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of the Fermi/LAT- detected GRB 160816A 25222 s after the LAT trigger (Racusin et al. GCN Circ. 19802). A source consistent with the XRT position (Kennea et al. GCN Circ. 19806) and the LCOGT Faulkes Telescope North position (Guidorzi et al., GCN Circ. 19808) is detected in the initial UVOT exposures at the same position as reported by RATIR (Troja et al, GCN. Circ. 19809). Preliminary detections and 3-sigma upper limit using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white 27601 43846 879 21.48 +/- 0.22 v 27661 27703 41 >17.9 u 25222 37523 2287 21.37 +/- 0.31 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.25 in the direction of the burst (Schlegel et al. 1998).
GCN 19818 table
GRB_name GRB160816A
GCN_number 19818
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 19818 SUBJECT: GRB 160816A iTelescope observation DATE: 16/08/18 03:00:05 GMT FROM: Takanori Sakamoto at AGU Y. Kitaoka, T. Sakamoto, A. Yoshida (AGU) We observed the field of GRB 160816A detected by Fermi (Racusin et al., GCN Circ. 19802) with the iTelescope.Net (http://www.itelescope.net) T7 (17" Plane Wave) telescope located at the AstroCamp Observatory (Nerpio, Spain). 15 images of 60 sec exposures were taken in the R filter starting from August 16 22:50:57 (UT) about 5.9 hours after the trigger and stopped on August 16 23:26:36 (UT). We do not detect the optical afterglow both in the individual images and the stacked image at the X-ray afterglow position (Kennea et al., GCN Circ. 19806). The estimated five sigma upper limit of the combined image (total exposure of 900 sec) is ~18.3 using the USNO-B1 catalog.
GCN 19819 table
GRB_name GRB160816A
GCN_number 19819
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 19819 SUBJECT: GRB 160816A: confirmed fading with the LT DATE: 16/08/18 12:23:22 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), S. Kobayashi, I.A. Steele (LJMU), C.G. Mundell (U. Bath), A. Gomboc (U. Nova Gorica), N. Tanvir (U. Leicester) on behalf of a large collaboration report: The 2-m Liverpool Telescope observed GRB 160816A from August 17, 23:29 UT to August 18, 02:44 UT with a total net exposure of 600 s in both SDSS-R and SDSS-I filters. The optical afterglow candidate (Guidorzi et al. GCN 19808; Troja et al. GCN 19809; Kuin et al. GCN 19815) has faded to r=21.8 +- 0.2 mag at 1.3 days post burst, compatibly with an average power-law decay index alpha~1.
GCN 19820 table
GRB_name GRB160816A
GCN_number 19820
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 19820 SUBJECT: GRB 160816A: RATIR Optical and NIR Afterglow Confirmation DATE: 16/08/18 12:35:04 GMT FROM: Eleonora Troja at GSFC Eleonora Troja (GSFC), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM), Carlos Román- Zúñiga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report: We observed the field of GRB 160816A (Mailyan, et al., GCN 19804; Racusin, et al., GCN 19802) 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 2016/08 18.17 to 2016/08 18.47 UTC (1.44 to 1.72 days after the GBM trigger), obtaining a total of 2.47 hours exposure in the r and i bands and 1.03 hours exposure in the Z, Y, J, and H bands. For the source reported in Troja, et al. (GCN 19809), in comparison with the USNO-B1 and 2MASS catalogs, we obtain the following detections and upper limit (3-sigma): r 22.74 +/- 0.15 i 22.40 +/- 0.12 Z 22.19 +/- 0.19 Y 22.18 +/- 0.25 J > 22.32 H 21.20 +/- 0.18 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. The source intensity decreased significantly between our two epochs, corresponding to fading with power-law index alpha~-1.3 referenced to the burst trigger. This confirms that the candidate reported by Guidorzi, et al. (GCN 19808) and Troja et al. (GCN 19809) is the GRB afterglow. Deep imaging of the GRB location reveals additional optical sources within the XRT localization (Kennea et al., GCN 19806), however none of them have faded. We thank the staff of the Observatorio Astronómico Nacional in San Pedro Mártir.
GCN 19821 table
GRB_name GRB160816A
GCN_number 19821
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 19821 SUBJECT: GRB 160816A: MASTER OT early detection on coaded images DATE: 16/08/18 16:25:19 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs N.Tyurina, E. Gorbovskoy, V. Lipunov, V.Kornilov, P.Balanutsa, A.Kuznetsov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute R. Rebolo, M. Serra, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias K.Ivanov, O.Gres, N.M.Budnev, S.Yazev, Irkutsk State University D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory A. Tlatov, V.Senik, D. Dormidontov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk Hugo Levato, Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) R.Podesta, C.Mallamaci, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in IAC was pointed to the GRB160816.73 24 sec after notice time and 18726 sec after trigger time at 2016-08-16 22:43:04 UT. (We corrected start exposition time which published in previouse MASTER circular (Lipunov et al., GCN 19805). We reducted coadded images and found OT. We see OT on coadded images inside SWIFT XRT (Kennea et al., GCN19806) at LCOGT position (Guidorzi et al., GCN 19808, Kuin et al., GCN 19815) on two tubes with unfiltered magnitude calibrated by USNO B1 stars ( m = 0.2B+0.8R ): m_OT=20.5 (+0.5 -0.2) at mean exposition time 2016-08-16 23:05:53, 20095 sec (5.58 hours) after GBM trigger time. T_start =18762sec, T_end=21464 after trigger. The total exposition = 1800 sec. The images is available at http://observ.pereplet.ru/images/GRB160816AMASTER.jpg The message may be cited.
GCN 19824 table
GRB_name GRB160816A
GCN_number 19824
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 19824 SUBJECT: GRB 160816A: Further RATIR Optical and NIR Observations DATE: 16/08/19 14:22:23 GMT FROM: Eleonora Troja at GSFC Eleonora Troja (GSFC), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM), Carlos Román- Zúñiga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report: We observed the field of the Fermi GRB 160816A (Mailyan, et al., GCN 19804) 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 2016/08 19.16 to 2016/08 19.50 UTC (2.43 to 2.77 days after the GBM trigger), obtaining a total of 5.58 hours exposure in the r and i bands and 4.56 hours exposure in the Z and J bands. For the source reported in Troja, et al. (GCN 19809), in comparison with the USNO-B1 and 2MASS catalogs, we obtain the following detections: r 23.45 +/- 0.15 i 23.18 +/- 0.12 Z 22.64 +/- 0.12 J 22.37 +/- 0.16 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.
GCN 19825 table
GRB_name GRB160816A
GCN_number 19825
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 19825 SUBJECT: GRB 160816A: ISON/UAFO optical observations DATE: 16/08/19 15:34:50 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), E. Chornaya (UAFO, ISON), A. Matkin (UAFO), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 160816A (Racusin et al., GCN 19802; Mailyan et al., GCN 19804) with SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk observatory. We obtained several unfiltered images starting on August 17 (UT) 11:47:34. We detected optical afterglow (Guidorzi et al. GCN 19808; Troja et al. GCN 19809). Preliminary photometry of a combined image is following Date UT start t-T0 Filter Exp. OT Err. UL (mid, days) (s) 2016-08-17 11:47:34 0.80873 CR 275*20 20.90 0.22 21.5 Photometry is based on nearby USNO-B1.0 stars USNO-B1.0_id R2 1271-0576219 17.27 1271-0576200 17.52 1271-0576190 18.12 1271-0576101 17.00 1271-0576308 17.05
GCN 19829 table
GRB_name GRB160816A
GCN_number 19829
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 19829 SUBJECT: GRB 160816A: TSHAO optical observations DATE: 16/08/21 13:37:01 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Kusakin (Fesenkov Astrophysical Institute), A. Volnova (IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of 160816A (Racusin et al., GCN 19802; Mailyan et al., GCN 19804) with Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory. We obtained several images in R filter starting on August 17 and 18. We detected optical afterglow (Guidorzi et al. GCN 19808; Troja et al. GCN 19809) on Aug. 17 and obtained upper limit on Aug. 18. Preliminary photometry of a combined image is following Date UT start t-T0 Filter Exp. OT Err. UL (mid, days) (s) 2016-08-17 21:32:28 1.19553 R 105*30 21.70 0.20 21.9 2016-08-18 19:11:47 2.11663 R 148*30 n/d n/d 22.1 Photometry is based on nearby USNO-B1.0 stars USNO-B1.0_id R2 1271-0576219 17.27 1271-0576200 17.52 1271-0576190 18.12 1271-0576101 17.00
GCN 19881 table
GRB_name GRB160816A
GCN_number 19881
Detection_method Other
ra 322.4113°
decl 37.1329°
Circular_text TITLE: GCN CIRCULAR NUMBER: 19881 SUBJECT: GRB 160816A, the review of the sky area in plate archives DATE: 16/08/29 20:55:56 GMT FROM: Valentyna Golovnya at Main Astro Obs,Kyiv V.V. Golovnya, V.M. Andruk (Main Astro Obs., Kyiv) report: We have undertaken the review of the sky area in vicinity of GRB 160816A (Kennea J.A. et al., GCN 19806) on astronegatives, collected in Ukrainian NAS Main astronomical observatory plate archives (1976-1996). All the plates with the possible object appearance are digitized using Epson Expression 10000XL flatbed scanner and have been placed into Golosiiv Plate Archive database DBGPA with open access to them. The list of plates is given in the table: YYYYMMDD/TimeUT --Plates-- Exp. Bmag Star USNO-A2 19 850822/212139 GUA040C000726 18.0 16.2 1200-18040986 19860712/234442 GUA040C000958 16.0 16.0 1200-18048101 19 860713/000658 GUA040C000959A 16.0 16.1 1200-18044684 19 860716/233422 GUA040C000967 16.0 16.6 1200-18046182 19 860716/235509 GUA040C000968A 16.0 16.6 1200-18046182 TimeUT – T start of the maximum exposure; Plates - The plates archive identifier of DWA (D/F=40/200,M=103"/mm) GUA040C, of the Ukrainian NAS Main Astro obs, Marsden's number - 83) the plate number (http://gua.db.ukr-vo.org). Exp. - Duration of the maximum exposure (minutes). Bmag - Limited B mag, derived in the 6 minutes area around the location GRB 160816A given in P.A. Evans (P. Evans http://www.swift.ac.uk/xrt_positions/00020685/): RA(J2000)= 21h 29m 38.71s, Dec(J2000)= +37d 07' 58.3" Star USNO-A2 - Comparison star. The preview images of 5 areas together with the 6 min.of arc area from Aladin can be found in http://gua.db.ukr-vo.org/img/grb/160816A/index.html. The images with full resolution are available via e-mail on demand.
GCN 19892 table
GRB_name GRB160816A
GCN_number 19892
Detection_method Fermi LAT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 19892 SUBJECT: GRB 160816A: Possible radio afterglow detection at 15 GHz with AMI DATE: 16/09/05 20:21:51 GMT FROM: Kunal Mooley at Oxford U K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), C. Rumsey, D. Titterington, S. H. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester) We observed the Fermi/LAT GRB 160816A (Racusin et al., GCN 19802) with the AMI Large Array at 15 GHz on 2016 Aug 18.02, Aug 19.06, and Sep 03.02 (UT) as part of the 4pisky program. We detect a possible radio afterglow (consistent with the XRT location; Kennea et al., GCN 19806) in the second epoch with a peak flux density of 129+/-32 uJy, and 3sigma upper limits of 111 uJy and 168 uJy in the first and third epochs respectively. We thank the AMI staff for scheduling these observations. The AMI-GRB database is a log of all GRB follow up observations with the AMI, and is available at http://4pisky.org/ami-grb/.