GRB 201214B
GCN Circular 29056
Subject
GRB 201214B: MITSuME Akeno optical upper limits
Date
2020-12-16T13:52:03Z (5 years ago)
From
Noriatsu Nakamura at Tokyo Inst. of Tech. <nnakamura@hp.phys.titech.ac.jp>
N. Nakamura, R. Hosokawa, K. L. Murata, R. Adachi, M. Niwano, F.
Ogawa, N. Ito, S. Ogata, H. Takamatsu, H. Hara, Y. Yatsu, and N. Kawai
(TokyoTech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 201214B (The Fermi GBM team, GCN #29039,
P. Evans et al., GCN #29043, V. Lipunov et al., GCN #29044, D. Palmer
et al., GCN #29045, B. Sbarufatti et al., GCN #29052 ) with the
optical three color (g', Rc, and Ic) CCD cameras attached to the
MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan. The
observation with a series of 60 sec exposures started at 2020-12-15
18:51:41 UT(28.8 hour after trigger). We did not find any new point
sources within the enhanced Swift BAT circle (D. Palmer et al., GCN
#29045) in all three bands.
We obtained the 5-sigma limits of the stacked images as follows
T0+[hour] MID-UT T-EXP[sec] 5-sigma limits
------------------------------------------------------------------------------------------------
28.8 18:51:41 10380 g'>20.9,Rc>21.0,Ic>20.3
------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used the PS1 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.,
https://doi.org/10.1093/pasj/psaa091,
https://arxiv.org/abs/2008.11486; https://github.com/MNiwano/Eclaire).
GCN Circular 29054
Subject
GRB 201214B: Lowell Discovery Telescope optical observations
Date
2020-12-16T11:42:27Z (5 years ago)
From
Simone Dichiara at UMCP/NASA/GSFC <dichiara@umd.edu>
S.Dichiara (UMD, NASA-GSFC), E. Troja (UMD, NASA-GSFC), P. Gatkine
(Caltech), J.M. Durbak (UMD), S.B. Cenko (NASA-GSFC), B. O'Connor
(GWU, UMD), A. Kutyrev (UMD, NASA-GSFC), S. Veilleux (UMD) report:
We observed the field of the short GRB 201214B (Simpson et al.,
GCN 29045; Fermi GBM team, GCN 29039) using the Large Monolithic Imager
(LMI) on the 4.3m Lowell Discovery Telescope (LDT) at Happy Jack, AZ.
Observations started on December 15, at 11:21 UT (about 19.2 hours after
the Swift trigger) using the SDSS r, i and z filters. Observations were
taken at an airmass of about 1.3 and seeing of about 2.5". Our average
sensitivity is i<23.5 AB mag.
We do not detect any uncatalogued optical source at the position of the
Swift/XRT sources reported by Tohuvavohu et al. (GCN 29052).
By cross-correlating the refined BAT localization with the GLADE v2.3
galaxy catalog (Dalya et al. 2018), as described in Dichiara et al.
(2020), we note the presence of a nearby lenticular galaxy
(HyperLEDA-1359588 at ~280 Mpc) within the BAT error circle.
Further observations are planned.
We thank the staff of the Lowell Discovery Telescope for assistance with
these observations.
GCN Circular 29052
Subject
GRB 201214B: Swift-XRT observations
Date
2020-12-15T15:48:15Z (5 years ago)
From
Boris Sbarufatti at PSU <bxs60@psu.edu>
A. Tohuvavohu (U. Toronto), J.P. Osborne (U. Leicester), K.L. Page (U.
Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB), M.G.
Bernardini (INAF-OAB), E. Ambrosi (INAF-IASFPA) , B. Sbarufatti (PSU),
D.N. Burrows (PSU) and P.A. Evans (U. Leicester) report on behalf of
the Swift-XRT team:
Swift-XRT has performed follow-up observations of the
Swift/BAT-detected burst GRB 201214B, collecting 5.8 ks of Photon
Counting (PC) mode data between T0+27.2 ks and T0+51.1 ks.
Eight uncatalogued X-ray sources have been detected, however none of
them is above the RASS limit or shows definitive signs of fading.
Therefore, at the present time we cannot identify which, if any, is the
afterglow. Details of these sources are given below:
Source 1:
RA (J2000.0): 187.8292 = 12:31:19.02
Dec (J2000.0): +9.0458 = +09:02:44.8
Error: 4.9 arcsec (radius, 90% conf.)
Count-rate: (2.47 [+1.03, -0.83])e-3 ct s^-1
Distance: 720 arcsec from Swift/BAT position.
Flux: (4.9 [+2.1, -1.6])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)
Source 2:
RA (J2000.0): 187.9923 = 12:31:58.15
Dec (J2000.0): +9.0742 = +09:04:26.9
Error: 4.6 arcsec (radius, 90% conf.)
Count-rate: (2.50 [+0.94, -0.77])e-3 ct s^-1
Distance: 175 arcsec from Swift/BAT position.
Flux: (8.2 [+3.1, -2.5])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)
Source 3:
RA (J2000.0): 187.8467 = 12:31:23.21
Dec (J2000.0): +9.1051 = +09:06:18.5
Error: 4.6 arcsec (radius, 90% conf.)
Count-rate: (1.57 [+0.86, -0.65])e-3 ct s^-1
Distance: 693 arcsec from Swift/BAT position.
Source 4:
RA (J2000.0): 188.1338 = 12:32:32.10
Dec (J2000.0): +9.1148 = +09:06:53.1
Error: 6.0 arcsec (radius, 90% conf.)
Count-rate: (1.89 [+0.85, -0.67])e-3 ct s^-1
Distance: 440 arcsec from Swift/BAT position.
Flux: (5.9 [+2.6, -2.1])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)
Source 5:
RA (J2000.0): 188.1013 = 12:32:24.32
Dec (J2000.0): +9.1072 = +09:06:26.1
Error: 6.1 arcsec (radius, 90% conf.)
Count-rate: (1.49 [+0.76, -0.59])e-3 ct s^-1
Distance: 333 arcsec from Swift/BAT position.
Flux: (5.4 [+2.7, -2.1])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)
Source 6:
RA (J2000.0): 188.0148 = 12:32:3.54
Dec (J2000.0): +8.9310 = +08:55:51.5
Error: 5.2 arcsec (radius, 90% conf.)
Count-rate: (2.02 [+0.86, -0.69])e-3 ct s^-1
Distance: 415 arcsec from Swift/BAT position.
Source 7:
RA (J2000.0): 187.9055 = 12:31:37.31
Dec (J2000.0): +8.9889 = +08:59:19.9
Error: 5.0 arcsec (radius, 90% conf.)
Count-rate: (1.93 [+0.94, -0.73])e-3 ct s^-1
Distance: 493 arcsec from Swift/BAT position.
Flux: (3.7 [+1.8, -1.4])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)
Source 9:
RA (J2000.0): 187.9206 = 12:31:40.95
Dec (J2000.0): +9.0086 = +09:00:31.1
Error: 5.3 arcsec (radius, 90% conf.)
Count-rate: (8.0 [+6.0, -4.2])e-4 ct s^-1
Distance: 417 arcsec from Swift/BAT position.
A catalogued source was also detected.
The results of the XRT-team automatic analysis of the XRT observations,
including a position-specific upper limit calculator, are available at
https://www.swift.ac.uk/ToO_GRBs/00021407.
This circular is an official product of the Swift-XRT team.
GCN Circular 29045
Subject
GRB 201214B: Swift BAT location of short burst
Date
2020-12-15T02:40:30Z (5 years ago)
From
David Palmer at LANL <palmer@lanl.gov>
K. K. Simpson (PSU), D. M. Palmer (LANL) and A. Tohuvavohu (U Toronto)
report on behalf of the Neil Gehrels Swift Observatory Team:
At 16:07:46 UT on 2020-12-14, simultaneously with the Fermi GBM
detection of GRB 201214B (GCN 29039), BAT triggered (Trigger=1012872)
on a rate increase at the 0.064 s timescale and produced an image.
This image shows a 6 sigma peak, which was not significant enough
to trigger an automated ground notification and repoint.
The on-board calculated location
ra, dec = 188.032, +9.045 was refined by ground analysis
to 187.9710, +9.1031 which is
RA(J2000) = 12h 31m 53s
Dec(J2000) = 09d 06' 11���
with an uncertainty of 2 arcminutes (radius, 90% containment, including
systematic uncertainty). The currently-available BAT light curve shows
a ~0.1 second long peak, with a possible smaller peak 0.3 seconds earlier.
The peak value on a 64 ms timescale is ~3000 counts/s (15-350 keV)
at the trigger time.
Swift has begun XRT and UVOT observations of this source starting at T0+~28ks
using the on-board BAT location (GCN 29043).
Automated analysis of the XRT data will be presented online at
https://www.swift.ac.uk/ToO_GRBs/00021407
The BAT location is consistent with both the Fermi-GBM position and
the IPN annulus (Svinkin, priv. comm.). The temporal and positional
coincidence with the Fermi GBM burst convinces us that the BAT
location is correct.
Burst Advocate for this burst is K. K. Simpson (kira.simpson1984 AT gmail.com).
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 Circular 29044
Subject
Fermi GRB 201214B: Global MASTER-Net observations report
Date
2020-12-15T00:15:31Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin,
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov, D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile
(Observatorio Astronomico Felix Aguilar OAFA),
R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),
D. Buckley
(South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova
(Irkutsk State University, API),
A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich, Yu. Sergienko
(Blagoveschensk Educational State University)
MASTER-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 201214B ( Fermi GBM team, GCN 29039) errorbox 27106 sec after notice time and 27134 sec after trigger time at 2020-12-14 23:40:01 UT, with upper limit up to 19.1 mag. The observations began at zenith distance = 78 deg. The sun altitude is -57.5 deg.
The galactic latitude b = 70 deg., longitude l = 346 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1502538
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
27165 | 2020-12-14 23:40:01 | MASTER-Tavrida | (13h 38m 31.09s , +18d 15m 51.4s) | C | 60 | 18.6 |
27483 | 2020-12-14 23:45:19 | MASTER-Tavrida | (13h 38m 25.91s , +18d 14m 10.0s) | C | 60 | 18.5 |
27867 | 2020-12-14 23:51:43 | MASTER-Tavrida | (13h 12m 59.27s , +16d 17m 10.4s) | C | 60 | 18.4 |
28027 | 2020-12-14 23:54:23 | MASTER-Tavrida | (13h 21m 32.36s , +18d 15m 02.8s) | C | 60 | 18.4 |
28106 | 2020-12-14 23:55:42 | MASTER-Tavrida | (13h 31m 21.52s , +20d 14m 55.6s) | C | 60 | 18.9 |
28186 | 2020-12-14 23:57:02 | MASTER-Tavrida | (13h 13m 02.71s , +16d 17m 02.2s) | C | 60 | 18.4 |
28421 | 2020-12-15 00:00:57 | MASTER-Tavrida | (13h 21m 31.21s , +18d 17m 09.9s) | C | 60 | 18.4 |
28500 | 2020-12-15 00:02:16 | MASTER-Tavrida | (13h 31m 22.57s , +20d 16m 00.3s) | C | 60 | 18.9 |
28580 | 2020-12-15 00:03:36 | MASTER-Tavrida | (13h 05m 33.46s , +14d 15m 34.2s) | C | 60 | 18.5 |
28659 | 2020-12-15 00:04:55 | MASTER-Tavrida | (13h 14m 18.52s , +20d 15m 55.0s) | C | 60 | 18.6 |
28739 | 2020-12-15 00:06:15 | MASTER-Tavrida | (13h 04m 42.98s , +18d 17m 31.2s) | C | 60 | 18.9 |
28818 | 2020-12-15 00:07:34 | MASTER-Tavrida | (13h 42m 17.57s , +22d 15m 25.0s) | C | 60 | 19.0 |
28897 | 2020-12-15 00:08:53 | MASTER-Tavrida | (13h 25m 03.32s , +22d 17m 01.8s) | C | 60 | 19.1 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 29043
Subject
GRB 201214B: Swift ToO observations
Date
2020-12-14T23:42:21Z (5 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
P. A. Evans (U. Leicester) reports on behalf of the Swift team:
Swift has initiated a ToO observation of the Swift/BAT GRB 201214B.
Automated analysis of the XRT data will be presented online at
https://www.swift.ac.uk/ToO_GRBs/00021407
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 Swift/BAT 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 Circular 29039
Subject
GRB 201214B: Fermi GBM Final Real-time Localization
Date
2020-12-14T16:15:39Z (5 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely SHORT GRB
At 16:07:46 UT on 14 Dec 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201214B (trigger 629654871.61686 / 201214672).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 206.2, Dec = 12.2 (J2000 degrees, equivalent to J2000 13h 44m, 12d 11'), with a statistical uncertainty of 11.1 degrees.
The angle from the Fermi LAT boresight is 20.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201214672/quicklook/glg_skymap_all_bn201214672.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/bn201214672/quicklook/glg_healpix_all_bn201214672.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201214672/quicklook/glg_lc_medres34_bn201214672.gif