Gamma-ray Burst 201116A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Nov 20 00:50:13 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     627180592
GRB_RA:          146.350d {+09h 45m 24s} (J2000),
                 146.610d {+09h 46m 26s} (current),
                 145.727d {+09h 42m 54s} (1950)
GRB_DEC:          -6.417d {-06d 25' 00"} (J2000),
                  -6.514d {-06d 30' 48"} (current),
                  -6.186d {-06d 11' 08"} (1950)
GRB_ERROR:       4.37 [deg radius, statistical plus systematic]
GRB_INTEN:       904 [cnts/sec]
DATA_SIGNIF:     20.80 [sigma]
INTEG_TIME:      0.256 [sec]
GRB_DATE:        19169 TJD;   321 DOY;   20/11/16
GRB_TIME:        2987.69 SOD {00:49:47.69} UT
GRB_PHI:         300.00 [deg]
GRB_THETA:        15.00 [deg]
DATA_TIME_SCALE: 0.2560 [sec]
HARD_RATIO:      0.50
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       1,1,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       231.75d {+15h 27m 01s}  -18.80d {-18d 48' 02"}
SUN_DIST:         83.33 [deg]   Sun_angle= 5.7 [hr] (West of Sun)
MOON_POSTN:      243.82d {+16h 15m 18s}  -19.92d {-19d 55' 00"}
MOON_DIST:        94.51 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      242.64, 33.90 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      150.88,-18.76 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_lc_medres34_bn201116035.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 79.07,-0.23 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Nov 20 00:50:22 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      60
TRIGGER_NUM:     627180592
GRB_RA:          146.483d {+09h 45m 56s} (J2000),
                 146.744d {+09h 46m 59s} (current),
                 145.859d {+09h 43m 26s} (1950)
GRB_DEC:          -6.133d {-06d 07' 59"} (J2000),
                  -6.230d {-06d 13' 48"} (current),
                  -5.902d {-05d 54' 06"} (1950)
GRB_ERROR:       4.25 [deg radius, statistical plus systematic]
GRB_INTEN:       1023 [cnts/sec]
DATA_SIGNIF:     90.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        19169 TJD;   321 DOY;   20/11/16
GRB_TIME:        2987.69 SOD {00:49:47.69} UT
GRB_PHI:         300.00 [deg]
GRB_THETA:        15.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.64
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   3%  Generic Transient
DETECTORS:       1,1,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       231.75d {+15h 27m 01s}  -18.80d {-18d 48' 02"}
SUN_DIST:         83.29 [deg]   Sun_angle= 5.7 [hr] (West of Sun)
MOON_POSTN:      243.83d {+16h 15m 18s}  -19.92d {-19d 55' 02"}
MOON_DIST:        94.49 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      242.47, 34.18 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      150.91,-18.45 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_lc_medres34_bn201116035.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 79.07,-0.23 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the CALET_GBM event (trignum=1289522797).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Nov 20 00:50:31 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      59
TRIGGER_NUM:     627180592
GRB_RA:          149.480d {+09h 57m 55s} (J2000),
                 149.743d {+09h 58m 58s} (current),
                 148.850d {+09h 55m 24s} (1950)
GRB_DEC:          -4.200d {-04d 12' 00"} (J2000),
                  -4.300d {-04d 18' 00"} (current),
                  -3.961d {-03d 57' 38"} (1950)
GRB_ERROR:       1.01 [deg radius, statistical only]
DATA_SIGNIF:     61.80 [sigma]
DATA_INTERVAL:   2.048 [sec]
GRB_DATE:        19169 TJD;   321 DOY;   20/11/16
GRB_TIME:        2987.69 SOD {00:49:47.69} UT
GRB_PHI:         314.00 [deg]
GRB_THETA:        14.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       231.75d {+15h 27m 01s}  -18.80d {-18d 48' 02"}
SUN_DIST:         81.06 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:      243.83d {+16h 15m 19s}  -19.92d {-19d 55' 03"}
MOON_DIST:        92.36 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      242.95, 37.71 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      153.12,-15.58 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_lc_medres34_bn201116035.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_627180592.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the CALET_GBM event (trignum=1289522797).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Nov 20 00:51:12 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      3
TRIGGER_NUM:     627180592
GRB_RA:          149.440d {+09h 57m 46s} (J2000),
                 149.703d {+09h 58m 49s} (current),
                 148.810d {+09h 55m 14s} (1950)
GRB_DEC:          -4.300d {-04d 17' 59"} (J2000),
                  -4.400d {-04d 24' 00"} (current),
                  -4.061d {-04d 03' 39"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
DATA_SIGNIF:     90.30 [sigma]
DATA_INTERVAL:   6.144 [sec]
GRB_DATE:        19169 TJD;   321 DOY;   20/11/16
GRB_TIME:        2987.69 SOD {00:49:47.69} UT
GRB_PHI:         314.00 [deg]
GRB_THETA:        14.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       231.75d {+15h 27m 01s}  -18.80d {-18d 48' 03"}
SUN_DIST:         81.07 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:      243.83d {+16h 15m 20s}  -19.92d {-19d 55' 10"}
MOON_DIST:        92.37 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      243.01, 37.62 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      153.12,-15.69 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_lc_medres34_bn201116035.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_627180592.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the CALET_GBM event (trignum=1289522797).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Nov 20 00:59:14 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     627180592
GRB_RA:          149.480d {+09h 57m 55s} (J2000),
                 149.743d {+09h 58m 58s} (current),
                 148.850d {+09h 55m 24s} (1950)
GRB_DEC:          -4.200d {-04d 12' 00"} (J2000),
                  -4.300d {-04d 18' 00"} (current),
                  -3.961d {-03d 57' 38"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
GRB_DATE:        19169 TJD;   321 DOY;   20/11/16
GRB_TIME:        2987.69 SOD {00:49:47.69} UT
GRB_PHI:         314.00 [deg]
GRB_THETA:        14.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       231.76d {+15h 27m 02s}  -18.80d {-18d 48' 08"}
SUN_DIST:         81.07 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:      243.92d {+16h 15m 41s}  -19.94d {-19d 56' 27"}
MOON_DIST:        92.45 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      242.95, 37.71 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      153.12,-15.58 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_lc_medres34_bn201116035.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_locplot_all_bn201116035.png
COMMENTS:        Fermi-GBM Final Position.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
COMMENTS:        This notice was generated completely by automated pipeline processing.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the CALET_GBM event (trignum=1289522797).

GCN Circular #28897
The Fermi GBM team reports the detection of a likely LONG GRB
At 00:49:47 UT on 16 Nov 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201116A (trigger 627180592.69203 / 201116035).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 149.5, Dec = -4.2 (J2000 degrees, equivalent to J2000 09h 58m, -4d 12'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 14.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_skymap_all_bn201116035.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/bn201116035/quicklook/glg_healpix_all_bn201116035.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201116035/quicklook/glg_lc_medres34_bn201116035.gif
GCN Circular #28898
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 627180592 at 00:49:47 on 16 Nov. 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) = 148.42+/-0.33 deg
Decl.(2000.0) = 2.46+/-0.57 deg
```
We estimate an additional systematic error of 1 deg.
Further details are available at: https://grb.mpe.mpg.de/grb/GRB201116035/
The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB201116035/healpix
The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB201116035/json

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 16 Nov 20 11:54:15 UT
NOTICE_TYPE:     Fermi-LAT Offline Position
TRIGGER_NUM:     627180592 
GRB_RA:          149.330d {+09h 57m 19s} (J2000),
                 149.598d {+09h 58m 23s} (current),
                 148.688d {+09h 54m 45s} (1950)
GRB_DEC:          +0.316d {+00d 18' 58"} (J2000),
                  +0.216d {+00d 12' 57"} (current),
                  +0.555d {+00d 33' 17"} (1950)
GRB_ERROR:       15.00 [arcmin radius, 90% containment, statistical only]
GRB_DATE:        19169 TJD;   321 DOY;   20/11/16
GRB_TIME:        2987.00 SOD {00:49:47.00} UT
TRIGGER_ID:      0x20000000
MISC:            0x40000000
SUN_POSTN:       232.23d {+15h 28m 55s}  -18.91d {-18d 54' 52"}
SUN_DIST:         83.10 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:      250.98d {+16h 43m 56s}  -21.55d {-21d 33' 11"}  
MOON_DIST:       100.66 [deg] 
MOON_ILLUM:      2 [%]
GAL_COORDS:      238.24, 40.37 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      151.34,-11.41 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi LAT Offline position.
COMMENTS:        This Notice was ground-generated -- not flight-generated.
COMMENTS:        It is the result of human-in-the-loop processing.
COMMENTS:        This is a human generated position of a LAT ground detection.
COMMENTS:        This source corresponds to GBM trigger 627180592.69203.

GCN Circular #28905
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 LAT GRB201116.03 (trigger No 627180592,09h 57m 19.20s , +00d 18m 57.6s, R=0.25) errorbox 5535 sec after trigger time at 2020-11-16 02:22:02 UT, with upper limit up to 17.1 mag. The observations began at zenith distance = 77 deg. The sun altitude is -66.5 deg.
The galactic latitude b = 41 deg., longitude l = 239 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1483260
We obtain a following upper limits.
```
Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    5565 | 2020-11-16 02:22:02 |          MASTER-IAC | (10h 01m 59.68s , +00d 06m 23.4s) |   C |    60 | 15.9 |        
    6479 | 2020-11-16 02:37:16 |          MASTER-IAC | (10h 02m 01.67s , +00d 05m 39.8s) |   C |    60 | 17.1 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #28906
P. A. Evans (U. Leicester) reports on behalf of the Swift team:
Swift has initiated a series of observations, tiled on the sky, of the Fermi/LAT GRB 201116A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/xrt_products/TILED_GRB00095
Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. The probability of finding serendipitous sources, unrelated to the Fermi/LAT event is high: 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 #28907
M. Axelsson (KTH & Stockholm Univ.), M. Ohno (Hiroshima Univ. & Eotvos Univ.), E. Bissaldi (Politecnico & INFN Bari), F. Longo (University and INFN, Trieste) and F. Piron (CNRS/IN2P3/LUPM) report on behalf of the Fermi-LAT Collaboration:
On November 16, 2020 Fermi-LAT detected high-energy emission from GRB 201116A, which was also detected by Fermi-GBM (trigger 627180592, GCN 28897).
The best LAT on-ground location is found to be
RA, Dec 149.33, 0.32 (degrees, J2000)
with an error radius of 0.24 deg (90% containment, statistical error only). This was 14 deg from the LAT boresight at the time of the GBM trigger:
T0 = 00:49:47 UT.
The data from the Fermi-LAT show a significant increase in the event rate after the GBM trigger that is spatially correlated with the GBM emission (4 degrees from the GBM location) with high significance. The photon flux above 100 MeV in the time interval 0-1000s after the GBM trigger is (2.25+/-0.07)e-06 ph/cm2/s.
The estimated photon index above 100 MeV is -1.9 +/- 0.3.
The highest-energy photon is a 2.4 GeV event which is observed 82 seconds after the GBM trigger.
A Swift ToO has been approved for this burst.
The Fermi-LAT point of contact for this burst is Frederic Piron (piron@in2p3.fr).
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 Circular #28915
A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), D. A. Kann, M. Blazek, C. C. Thoene, J. F. Agui Fernandez (all HETH/IAA-CSIC), and A. Sota (IAA-CSIC) report:
We observed the location of the Swift XRT source #3 found in tiled Swift observations (Evans, GCN #28906), potentially the (X-ray) afterglow of Fermi GBM/LAT GRB 201116A (Fermi GBM Team, GCN #28897; Kunzweiler et al., GCN #28898; Axelsson et al., GCN #28907) with the 1.5m telescope of the Observatorio Sierra Nevada, in Granada, Spain. We obtained 15 x 180 s images in Rc, beginning 2020-11-17 03:24:46.56 UT, 1.1076 days after the GRB.
We detect a faint source in the Rc-band stack at (J2000)
```
RA   =  09:57:17.94
Dec. = +00:16:34.1
```
with Rc = 23.18 +/ 0.18 mag (AB), as measured against multiple SDSS comparison stars.
This source is not visible in SDSS or PanSTARRS imaging, suggesting it is the GRB afterglow. We cannot determine evidence for fading, however.
We wish to congratulate the SpaceX Crew-1 astronauts for their successful arrival at the ISS.
GCN Circular #28916
A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), 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 Fermi/LAT-detected burst GRB 201116A (Axelsson et al. GCN Circ. 28907) in a series of observations tiled on the sky. The total exposure time is 4.8 ks, distributed over 3 tiles; the maximum exposure at a single sky location was 3.1 ks. The data were collected between T0+46.5 ks and T0+62.3 ks, and are entirely in Photon Counting (PC) mode.
Four uncatalogued X-ray sources are detected, of which one ("Source 3") is above the RASS 3-sigma upper limit at this position, and shows signes of fading, and is therefore likely the GRB afterglow. Using 2405 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 = 149.32493, +0.27586 which is equivalent to:
```
RA (J2000): 09h 57m 17.98s
Dec(J2000): +00d 16' 33.1"
```
with an uncertainty of 2.5 arcsec (radius, 90% confidence). This position is 2.4 arcmin from the Fermi/LAT position. As already reported by de Ugarte Postigo et al (GCN Circ. 28915), there is an optical afterglow counterpart consistent with this X-ray object. The light curve is consistent with a constant source of mean count rate 5.2e-02 ct/sec, however fading also cannot be ruled out. A power-law fit gives an index of 1.6 (+1.4, -2.0), thus the large uncertainties hinder a confident statement about fading.
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.9 (+0.6, -0.5). The best-fitting absorption column is 2.7 (+2.5, -1.9) x 10^21 cm^-2, in excess of the Galactic value of 2.8 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 3.2 x 10^-11 (4.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.7 (+2.5, -1.9) x 10^21 cm^-2
Galactic foreground: 2.8 x 10^20 cm^-2
Excess significance: 2.1 sigma
Photon index:	     1.9 (+0.6, -0.5)
```
The results of the XRT-team automatic analysis of the afterglow are at: https://www.swift.ac.uk/xrt_products/00021040.
The results of the full analysis of the tiled XRT observations are available at https://www.swift.ac.uk/xrt_products/TILED_GRB00095.
This circular is an official product of the Swift-XRT team.
GCN Circular #28917
Z.P. Zhu (NAOC, HUST), D. B. Malesani (DTU Space), D. Xu (NAOC), A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), L. Izzo (DARK/NBI), P. Galindo (NOT), report on behalf of a larger collaboration:
On 2020 Nov 17, we observed the afterglow (de Ugarte Postigo et al., GCN 28915; Tohuvavohu� et al., GCN 28916) of GRB 201116A, detected by Fermi/GBM and Fermi/LAT (Axelsson et al., GCN 28907), using the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. We obtained one and three 300-s images in the r and z bands, respectively.
An optical source is detected in both filters, respectively, being consistent with the reported OSN position as well as with the Swift/XRT position. Preliminary photometry results are as follows:
```
 ��� T_start��������� T_mid�� Exptime� Filter�� Mag�� MagErr
 ���� (UT)����������� (day)�� (s)
2020-11-17T04:33:15� 1.157�� 1x300��� sdss-r�� 23.18 0.20
2020-11-17T04:38:51� 1.165�� 3x300��� sdss-z�� 22.50 0.27
```
calibrated against nearby PS1 stars. Our observations confirm the presence of the source, which is a clear afterglow candidate, though the photometric error and short time difference do not allow to establish variability compared to the OSN measurement (de Ugarte Postigo et al., GCN 28915).
GCN Circular #28920
A. Ridnaia, S. Golenetskii, R. Aptekar, D. Frederiks, M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report:
The long-duration GRB 201116A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 28897, Kunzweiler et al., GCN Circ. 28898; Fermi-LAT detection: Axelsson et al., GCN Circ. 28907) triggered Konus-Wind at T0=2988.982 s UT (00:49:48.982).
The burst light curve shows a multipeaked structure which starts at ~T0-1.3 s and has a total duration of ~9.5 s. The emission is seen up to ~4 MeV.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB201116_T02988/
As observed by Konus-Wind, the burst had a fluence of 2.46(-0.34,+0.33)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+3.792 s, of 9.01(-2.15,+2.14)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+7.680 s) is best fit in the 20 keV - 4 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.53(-0.23,+0.25), the high energy photon index beta = -2.56(-0.69,+0.23), the peak energy Ep = 220(-28,+40) keV (chi2 = 90/97 dof).
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN Circular #28923
N. Cannady (GSFC/UMBC), A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), Y. Asaoka (ICRR), S. Torii, Y. Akaike, K. Kobayashi (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), M. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena), and the CALET collaboration:
The bright GRB 201116A (Fermi GBM Final Real-time Localization: The Fermi GBM team, GCN Circ. 28897; BALROG localization: Kunzweiler et al., GCN Circ. 28898; Fermi-LAT detection: Axelsson and Ohno, GCN Circ. 28907; Konus-Wind detection: Ridnaia et al., GCN Circ. 28920; https://gcn.gsfc.nasa.gov/other/201116A.gcn3) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 00:49:45.039 UTC on 16 November 2020 (http://cgbm.calet.jp/cgbm_trigger/flight/1289522797/). The burst signal was seen by all CGBM detectors.
The burst light curve shows a multi-peaked pulse which starts at T+2.6 sec, peaks at T+7.9 sec, and ends at T+12.4 sec. The T90 and T50 durations measured by the SGM data are 6.5 +- 0.6 sec and 3.0 +- 0.4 sec (40-1000 keV), respectively.
The ground processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1289522797/
The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.

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