Gamma-ray Burst 201214A

(All information courtesy of the instrument teams.)

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Results of Observations

GCN/BACODINE POSITION NOTICE

 
TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 14 Dec 20 06:18:59 UT
NOTICE_TYPE:    INTEGRAL Weak 
TRIGGER_NUM:    8893,   Sub_Num: 0
GRB_RA:         170.9744d {+11h 23m 54s} (J2000),
                171.2549d {+11h 25m 01s} (current),
                170.3033d {+11h 21m 13s} (1950)
GRB_DEC:        +33.8640d {+33d 51' 50"} (J2000),
                +33.7487d {+33d 44' 55"} (current),
                +34.1387d {+34d 08' 19"} (1950)
GRB_ERROR:      3.53 [arcmin, radius, statistical only]
GRB_INTEN:      6.93 [sigma]
GRB_TIME:       22730.48 SOD {06:18:50.48} UT
GRB_DATE:       19197 TJD;   349 DOY;   20/12/14
SC_RA:          162.33 [deg] (J2000) 
SC_DEC:          42.70 [deg] (J2000) 
SUN_POSTN:      262.08d {+17h 28m 18s}  -23.24d {-23d 14' 08"}
SUN_DIST:       103.30 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
MOON_POSTN:     255.97d {+17h 03m 54s}  -22.62d {-22d 37' 06"}  
MOON_DIST:       98.22 [deg] 
GAL_COORDS:     187.89, 70.02 [deg] galactic lon,lat of the burst
ECL_COORDS:     157.41, 27.35 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates -- this is the weak/subthreshold trigger notice.
COMMENTS:       This notice may or may not be followed by a Wakeup/Refined/Offline notice.
COMMENTS:       Time_Scale=25.0000 and Time_Error=25.0000.
COMMENTS:       Possibly real GRB event (WEAK detection)

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 14 Dec 20 06:19:02 UT
NOTICE_TYPE:    INTEGRAL Wakeup
TRIGGER_NUM:    8893,   Sub_Num: 1
GRB_RA:         171.0007d {+11h 24m 00s} (J2000),
                171.2812d {+11h 25m 07s} (current),
                170.3298d {+11h 21m 19s} (1950)
GRB_DEC:        +33.8532d {+33d 51' 11"} (J2000),
                +33.7379d {+33d 44' 16"} (current),
                +34.1279d {+34d 07' 40"} (1950)
GRB_ERROR:      3.25 [arcmin, radius, statistical only]
GRB_INTEN:      8.32 [sigma]
GRB_TIME:       22734.48 SOD {06:18:54.48} UT
GRB_DATE:       19197 TJD;   349 DOY;   20/12/14
SC_RA:          162.33 [deg] (J2000)
SC_DEC:          42.70 [deg] (J2000)
SUN_POSTN:      262.08d {+17h 28m 18s}  -23.24d {-23d 14' 08"}
SUN_DIST:       103.28 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
MOON_POSTN:     255.97d {+17h 03m 54s}  -22.62d {-22d 37' 07"}
MOON_DIST:       98.20 [deg]
GAL_COORDS:     187.91, 70.05 [deg] galactic lon,lat of the burst
ECL_COORDS:     157.44, 27.35 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.  
COMMENTS:       Time_Scale=10.0000 and Time_Error=10.0000.  
COMMENTS:       Possibly real GRB event

red DSS finding chart ps-file

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 14 Dec 20 06:22:01 UT
NOTICE_TYPE:    INTEGRAL Refined
TRIGGER_NUM:    8893,   Sub_Num: 2
GRB_RA:         170.9606d {+11h 23m 51s} (J2000),
                171.2411d {+11h 24m 58s} (current),
                170.2895d {+11h 21m 09s} (1950)
GRB_DEC:        +33.8527d {+33d 51' 10"} (J2000),
                +33.7374d {+33d 44' 15"} (current),
                +34.1273d {+34d 07' 38"} (1950)
GRB_ERROR:      3.12 [arcmin, radius, statistical only]
GRB_INTEN:      9.30 [sigma]
GRB_TIME:       22836.48 SOD {06:20:36.48} UT
GRB_DATE:       19197 TJD;   349 DOY;   20/12/14
SC_RA:          162.33 [deg] (J2000)
SC_DEC:          42.70 [deg] (J2000)
SUN_POSTN:      262.08d {+17h 28m 19s}  -23.24d {-23d 14' 09"}
SUN_DIST:       103.31 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
MOON_POSTN:     256.01d {+17h 04m 02s}  -22.62d {-22d 37' 27"}
MOON_DIST:       98.26 [deg]
GAL_COORDS:     187.93, 70.02 [deg] galactic lon,lat of the burst
ECL_COORDS:     157.41, 27.33 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.  
COMMENTS:       Time_Scale=100.0000 and Time_Error=100.0000.  
COMMENTS:       Possibly real GRB event

GCN Circular #29035
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-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) was pointed to the Integral GRB201214.26 (trigger No 74429,11h 24m 00.12s , +33d 51m 11.8s, R=0.0541667) errorbox 1 sec after notice time and 28 sec after trigger time at 2020-12-14 06:19:23 UT, with upper limit up to 19.9 mag. The observations began at zenith distance = 9 deg. The sun altitude is -18.6 deg.
The galactic latitude b = 71 deg., longitude l = 188 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1502296
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      34 |          MASTER-IAC |   C |    10 | 17.0 |        
      44 |          MASTER-IAC |   C |    30 | 17.2 |  Coadd 
      55 |          MASTER-IAC |   C |    10 | 17.0 |        
      77 |          MASTER-IAC |   C |    10 | 17.1 |        
     105 |          MASTER-IAC |   C |    20 | 17.9 |        
     135 |          MASTER-IAC |   C |    80 | 18.9 |  Coadd 
     141 |          MASTER-IAC |   C |    30 | 18.1 |        
     181 |          MASTER-IAC |   C |    30 | 18.1 |        
     226 |          MASTER-IAC |   C |    40 | 18.3 |        
     281 |          MASTER-IAC |   C |   150 | 19.3 |  Coadd 
     282 |          MASTER-IAC |   C |    50 | 18.7 |        
     346 |          MASTER-IAC |   C |    60 | 18.8 |        
     427 |          MASTER-IAC |   C |    80 | 18.9 |        
     532 |          MASTER-IAC |   C |   290 | 19.9 |  Coadd 
     520 |          MASTER-IAC |   C |    90 | 18.9 |        
     636 |          MASTER-IAC |   C |   120 | 19.4 |        
     777 |          MASTER-IAC |   C |   140 | 19.4 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #29036
P. A. Evans (U. Leicester) reports on behalf of the Swift team:
Swift has initiated a ToO observation of the INTEGRAL GRB 201214A. Automated analysis of the XRT data will be presented online at https://www.swift.ac.uk/ToO_GRBs/00021406
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 INTEGRAL 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 NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 14 Dec 20 07:49:24 UT
NOTICE_TYPE:    INTEGRAL Offline
TRIGGER_NUM:    8893,   Sub_Num: 3
GRB_RA:         170.9361d {+11h 23m 45s} (J2000),
                171.2166d {+11h 24m 52s} (current),
                170.2649d {+11h 21m 04s} (1950)
GRB_DEC:        +33.8724d {+33d 52' 21"} (J2000),
                +33.7572d {+33d 45' 26"} (current),
                +34.1471d {+34d 08' 50"} (1950)
GRB_ERROR:      2.50 [arcmin, radius, statistical only]
GRB_INTEN:      9.30 [sigma]
GRB_TIME:       22836.48 SOD {06:20:36.48} UT
GRB_DATE:       19197 TJD;   349 DOY;   20/12/14
SC_RA:          162.33 [deg] (J2000)
SC_DEC:          42.70 [deg] (J2000)
SUN_POSTN:      262.15d {+17h 28m 35s}  -23.24d {-23d 14' 21"}
SUN_DIST:       103.39 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
MOON_POSTN:     256.96d {+17h 07m 50s}  -22.79d {-22d 47' 12"}
MOON_DIST:       99.11 [deg]
GAL_COORDS:     187.89, 69.99 [deg] galactic lon,lat of the burst
ECL_COORDS:     157.38, 27.34 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.  
COMMENTS:       Time_Scale=100.0000 and Time_Error=100.0000.  
COMMENTS:       refined_coordinates_after_offline_analysis

GCN Circular #29037
S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report:
a gamma ray burst lasting about 150 s has been detected by IBAS in the IBIS/ISGRI data at 6:18:20 UT of 14 December 2020.
The refined coordinates (J2000) are:
```
R.A.  =  170.9361  deg
DEC.  =  +33.8725  deg
```
with an uncertainty of 2.5 arcmin (90% c.l.).
A preliminary analysis gives a peak flux of about 0.1 ph/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 5e-7 erg/cm2.
A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular #29040
Martin Jelinek and Jan Strobl (ASU CAS Ondrejov, CZ), Sergey Karpov, Martin Masek, Petr Janecek, Jakub Jurysek, Jan Ebr, Ronan Cunniffe, Petr Travnicek and Michael Prouza (Institute of Physics, Prague, CZ)
report:
The 25cm robotic telescope FRAM-ORM at La Palma (Spain) reacted robotically to the INTEGRAL alert of GRB201214A (Mereghetti et al., GCNC 29037), obtaining a series of 20s unfiltered images starting at 06:19:23.3 UT, i.e. 32.8s post trigger.
We do not detect any new or strongly variable source within a 20 arcmin FOV around the reported gamma-ray errorbox - neither in single images (detection limit R>~18.0) nor in a combined 40x20s frame (mean exp time 541s post trigger, with a limit R>~19.5).
GCN Circular #29048
J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), B. Sbarufatti (PSU) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:
Swift-XRT has performed follow-up observations of the INTEGRAL-detected burst GRB 201214A (Mereghetti et al. GCN Circ. 29037), collecting 4.1 ks of Photon Counting (PC) mode data between T0+5.2 ks and T0+23.6 ks.
One uncatalogued X-ray source has been detected consistent with being within 246 arcsec of the INTEGRAL position, it is below the RASS limit and shows no definitive signs of fading. Therefore, at the present time we cannot confirm this as the afterglow. Details of this source are given below:
Source 2:
```
  RA (J2000.0):  170.92446  =  11:23:41.87
  Dec (J2000.0): +33.86930  =  +33:52:09.5
  Error: 2.2 arcsec (radius, 90% conf. [Enhanced position])
  Count-rate: 0.0182 +/- 0.0024 ct s^-1   
  Distance: 36 arcsec from INTEGRAL position.
  Flux: (4.48 +/- 0.60)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)
```
Three uncatalogued sources were also detected too far from the GRB position to be likely afterglow candidates.
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/00021406.
This circular is an official product of the Swift-XRT team.
GCN Circular #29091
Amit Kumar (ARIES), Rahul Gupta (ARIES), Neelam Panwar (ARIES), Dimple (ARIES), Ankur Ghosh (ARIES), Avinash Singh (ARIES), Amar Aryan (ARIES), Shashi B. Pandey (ARIES), and Kuntal Misra (ARIES) report:
We observed the field of INTEGRAL-detected burst GRB 201214A (Mereghetti et al. GCN Circ. 29037; Evans et al., GCN 29036) with the 1.3m Devasthal Fast Optical Telescope (DFOT) located at Devasthal observatory of Aryabhatta Research Institute of Observational Sciences (ARIES), India. We observed a series of images ~16.6 hours after the burst in both R and I (300sx3 in each) filters (Johnson-Cousins) covering Swift XRT position (Kennea et al., GCN 29048). Preliminary photometry on the stacked images was performed and calibrated against the USNO-B1 catalog stars. We do not detect any OT candidate within the XRT position (see also Jelinek & Strobl GCN 29040). The upper limits in the stacked images are the following:
```
DATE       UT (start)  Filter Exposure(sec) Frames    Upper limit (mag)
2020-12-14 22:51:42    R      300           3        21.5
2020-12-14 23:27:40    I      300           3        21.0
```
This circular may be cited.
GCN Circular #29092
J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), B. Sbarufatti (PSU) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:
Swift-XRT has conducted further observations of the field of the INTEGRAL-detected burst GRB 201214A (Mereghetti et al. GCN Circ. 29037). The observations now extend from T0+5.3 ks to T0+378.1 ks. The source previously reported by Kennea et al. (GCN Circ. 29048), "Source 2", is fading with 3-sigma significance, and is therefore likely the GRB afterglow. Using 2671 s of PC mode data and 4 UVOT images, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 170.92446, +33.86930 which is equivalent to:
```
RA (J2000): 11h 23m 41.87s
Dec(J2000): +33d 52' 09.5"
```
with an uncertainty of 2.2 arcsec (radius, 90% confidence). This position is 36 arcsec from the INTEGRAL position. The source is fading with alpha >0.6.
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.7 (+0.9, -0.7). The best-fitting absorption column is 1.9 (+2.2, -1.6) x 10^21 cm^-2, in excess of the Galactic value of 2.4 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 2.6 x 10^-11 (2.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.9 (+2.2, -1.6) x 10^21 cm^-2
Galactic foreground: 2.4 x 10^20 cm^-2
Excess significance: 1.8 sigma
Photon index:	     2.7 (+0.9, -0.7)
```
The results of the XRT-team automatic analysis of the likely afterglow are at https://www.swift.ac.uk/ToO_GRBs/00021406/Source2.php. The results of the full analysis of the XRT observations are available at https://www.swift.ac.uk/ToO_GRBs/00021406.
This circular is an official product of the Swift-XRT team.
GCN Circular #29093
S. Belkin (IKI), N. Pankov (HSE), I. Reva (FAPHI), V. Kim (FAPHI), A. Pozanenko (IKI) report on behalf of GRB IKI FuN:
We observed the field of GRB 201214A (Mereghetti et al., GCN 29037) with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory starting on Dec. 14 (UT) 18:15:39. We did not find any source in the enhanced XRT position of an afterglow (Kennea et al., GCN 29092), see also (Jelinek et. al GCN 29040; Kumar et. al GCN 29091). Preliminary photometry of the filed is following.
```
Date       UT start t-T0    Filter  Exp.  OT    Err. UL(3 sigma)
                     (mid, days)     (s)

2020-12-14 18:15:39 0.50959  R      22*90 n/d   n/d  21.1
```
The photometry is based on nearby USNO-B1.0 stars.

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Jochen Greiner, last update: 19-Dec-2020 [Disclaimer]