Gamma-ray Burst 200107B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 07 Jan 20 19:27:13 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     948219,   Seg_Num: 0
GRB_RA:          107.066d {+07h 08m 16s} (J2000),
                 106.350d {+07h 05m 24s} (current),
                 108.814d {+07h 15m 15s} (1950)
GRB_DEC:         -83.716d {-83d 42' 56"} (J2000),
                 -83.748d {-83d 44' 51"} (current),
                 -83.630d {-83d 37' 47"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       11140 [cnts]    Image_Peak=391 [image_cnts]
TRIGGER_DUR:     4.096 [sec] 
TRIGGER_INDEX:   298     E_range: 25-100 keV
BKG_INTEN:       94695 [cnts]
BKG_TIME:        69935.77 SOD {19:25:35.77} UT
BKG_DUR:         40 [sec]
GRB_DATE:        18855 TJD;     7 DOY;   20/01/07
GRB_TIME:        69988.70 SOD {19:26:28.70} UT
GRB_PHI:           8.33 [deg]
GRB_THETA:        30.05 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     11.26 [sigma]
IMAGE_SIGNIF:    9.77 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +2  +0  +0  +0 -27  +0 
SUN_POSTN:       288.38d {+19h 13m 31s}  -22.36d {-22d 21' 38"}
SUN_DIST:         73.89 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:       68.02d {+04h 32m 05s}  +19.27d {+19d 16' 15"}
MOON_DIST:       104.33 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      295.93,-26.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      263.88,-72.48 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 202.81,5.51 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(6.0<100sec) coincident with the FERMI_GBM event (trignum=600117987).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 07 Jan 20 19:26:48 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     600117987
GRB_RA:          149.050d {+09h 56m 12s} (J2000),
                 149.157d {+09h 56m 38s} (current),
                 148.783d {+09h 55m 08s} (1950)
GRB_DEC:         -69.067d {-69d 04' 00"} (J2000),
                 -69.162d {-69d 09' 43"} (current),
                 -68.828d {-68d 49' 41"} (1950)
GRB_ERROR:       29.42 [deg radius, statistical plus systematic]
GRB_INTEN:       48 [cnts/sec]
DATA_SIGNIF:     4.50 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        18855 TJD;     7 DOY;   20/01/07
GRB_TIME:        69982.81 SOD {19:26:22.81} UT
GRB_PHI:         310.00 [deg]
GRB_THETA:        30.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.47
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       1,0,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       288.38d {+19h 13m 31s}  -22.36d {-22d 21' 38"}
SUN_DIST:         83.89 [deg]   Sun_angle= 9.3 [hr] (West of Sun)
MOON_POSTN:       68.02d {+04h 32m 04s}  +19.27d {+19d 16' 12"}
MOON_DIST:       104.88 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      288.32,-11.33 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      213.52,-68.44 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200107810/quicklook/glg_lc_medres34_bn200107810.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 92.57,4.88 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 07 Jan 20 19:27:35 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      85
TRIGGER_NUM:     600117987
GRB_RA:           90.400d {+06h 01m 36s} (J2000),
                  89.276d {+05h 57m 06s} (current),
                  93.202d {+06h 12m 49s} (1950)
GRB_DEC:         -85.383d {-85d 22' 59"} (J2000),
                 -85.383d {-85d 22' 58"} (current),
                 -85.375d {-85d 22' 27"} (1950)
GRB_ERROR:       11.50 [deg radius, statistical plus systematic]
GRB_INTEN:       136 [cnts/sec]
DATA_SIGNIF:     9.10 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        18855 TJD;     7 DOY;   20/01/07
GRB_TIME:        69982.81 SOD {19:26:22.81} UT
GRB_PHI:         308.00 [deg]
GRB_THETA:        50.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.81
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      98%  GRB
2nd_MOST_LIKELY:   1%  Generic Transient
DETECTORS:       1,0,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       288.38d {+19h 13m 31s}  -22.36d {-22d 21' 37"}
SUN_DIST:         72.01 [deg]   Sun_angle= -10.7 [hr] (East of Sun)
MOON_POSTN:       68.02d {+04h 32m 05s}  +19.27d {+19d 16' 18"}
MOON_DIST:       104.96 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      297.82,-28.03 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      269.90,-71.18 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200107810/quicklook/glg_lc_medres34_bn200107810.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 92.57,4.88 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(6.0<100sec) coincident with the SWIFT_BAT event (trignum=948219).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Tue 07 Jan 20 19:35:48 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     600117987
GRB_RA:          356.880d {+23h 47m 31s} (J2000),
                 357.170d {+23h 48m 41s} (current),
                 356.141d {+23h 44m 34s} (1950)
GRB_DEC:         -80.130d {-80d 07' 47"} (J2000),
                 -80.019d {-80d 01' 06"} (current),
                 -80.408d {-80d 24' 27"} (1950)
GRB_ERROR:       8.29 [deg radius, statistical only]
GRB_DATE:        18855 TJD;     7 DOY;   20/01/07
GRB_TIME:        69982.81 SOD {19:26:22.81} UT
GRB_PHI:         310.00 [deg]
GRB_THETA:        61.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       288.39d {+19h 13m 33s}  -22.36d {-22d 21' 35"}
SUN_DIST:         64.36 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:       68.10d {+04h 32m 24s}  +19.29d {+19d 17' 19"}
MOON_DIST:       105.78 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      306.30,-36.58 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      293.14,-64.18 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200107810/quicklook/glg_lc_medres34_bn200107810.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200107810/quicklook/glg_locplot_all_bn200107810.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(6.0<100sec) coincident with the SWIFT_BAT event (trignum=948219).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 07 Jan 20 19:30:28 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     948219,   Seg_Num: 0
GRB_RA:          107.066d {+07h 08m 16s} (J2000),
                 106.350d {+07h 05m 24s} (current),
                 108.814d {+07h 15m 15s} (1950)
GRB_DEC:         -83.716d {-83d 42' 56"} (J2000),
                 -83.748d {-83d 44' 51"} (current),
                 -83.630d {-83d 37' 47"} (1950)
GRB_DATE:        18855 TJD;     7 DOY;   20/01/07
GRB_TIME:        69988.70 SOD {19:26:28.70} UT
TRIGGER_INDEX:   298
GRB_PHI:           8.33 [deg]
GRB_THETA:        30.05 [deg]
DELTA_TIME:      -11.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.26 [sigma]
IMAGE_SIGNIF:    9.77 [sigma]
LC_URL:          sw00948219000msb.lc
SUN_POSTN:       288.38d {+19h 13m 32s}  -22.36d {-22d 21' 37"}
SUN_DIST:         73.89 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:       68.05d {+04h 32m 12s}  +19.28d {+19d 16' 40"}
MOON_DIST:       104.33 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      295.93,-26.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      263.88,-72.48 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 202.81,5.51 [deg].

GCN Circular #26658
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),
H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),
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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB200107.81 (trigger No 948219,07h 08m 15.74s , -83d 42m 56.5s, R=0.05) errorbox 18 sec after notice time and 69 sec after trigger time at 2020-01-07 19:27:38 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 54 deg. The sun altitude is -18.0 deg.
The galactic latitude b = -27 deg., longitude l = 296 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1253647
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      75 |         MASTER-SAAO |  P\ |    10 | 16.5 |        
      98 |         MASTER-SAAO |  P\ |    20 | 16.9 |        
     126 |         MASTER-SAAO |  P\ |    20 | 16.9 |        
     159 |         MASTER-SAAO |  P\ |    30 | 17.0 |        
     203 |         MASTER-SAAO |  P\ |    40 | 17.3 |        
     256 |         MASTER-SAAO |  P\ |    50 | 17.3 |        
     319 |         MASTER-SAAO |  P\ |    60 | 17.5 |        
     393 |         MASTER-SAAO |  P\ |    70 | 17.7 |        
```
The observation and reduction will continue. The message may be cited.
GCN Circular #26659
The Fermi GBM team reports the detection of a likely LONG GRB
At 19:26:22 UT on 7 Jan 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200107B (trigger 600117987.8063 / 200107810).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 356.9, Dec = -80.1 (J2000 degrees, equivalent to J2000 23h 47m, -80d 05'), with a statistical uncertainty of 8.3 degrees.
The angle from the Fermi LAT boresight is 61.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200107810/quicklook/glg_skymap_all_bn200107810.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/bn200107810/quicklook/glg_healpix_all_bn200107810.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200107810/quicklook/glg_lc_medres34_bn200107810.gif

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 07 Jan 20 19:41:34 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     948219,   Seg_Num: 0
POINT_RA:        107.014d {+07h 08m 03s} (J2000)
POINT_DEC:       -83.742d {-83d 44' 29"} (J2000)
IMG_START_DATE:  18855 TJD;     7 DOY;   20/01/07
IMG_START_TIME:  70887.69 SOD {19:41:27.69} UT,   899.0 [sec] since BAT Trigger Time
COUNTS:          3    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Nov 19 15:46:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     933515,   Seg_Num: 0
POINT_RA:        269.357d {+17h 57m 26s} (J2000)
POINT_DEC:       +46.060d {+46d 03' 36"} (J2000)
ROLL:            227.438d
IMG_START_DATE:  18793 TJD;   310 DOY;   19/11/06
IMG_START_TIME:  56310.08 SOD {15:38:30.08} UT,   4986.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     594747533
X_OFFSET:        847 [pixels]
Y_OFFSET:        810 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       970
BINNING_INDEX:   1
IM_URL:          sw00933515000msuni5010.fits
SUN_POSTN:       221.48d {+14h 45m 54s}  -16.02d {-16d 01' 09"}
SUN_DIST:         75.68 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      341.58d {+22h 46m 18s}  -12.47d {-12d 28' 16"}
MOON_DIST:        86.96 [deg]
MOON_ILLUM:      71 [%]
GAL_COORDS:       72.97, 28.20 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      268.73, 69.50 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 07 Jan 20 20:00:28 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     948219,   Seg_Num: 0
POINT_RA:        107.014d {+07h 08m 03s} (J2000)
POINT_DEC:       -83.742d {-83d 44' 30"} (J2000)
POINT_ROLL:      181.346d
IMG_START_DATE:  18855 TJD;     7 DOY;   20/01/07
IMG_START_TIME:  70891.39 SOD {19:41:31.39} UT,   902.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        8.507
N_STARS:         135
X_OFFSET:        294 [pixels]
Y_OFFSET:        632 [pixels]
X_MAX:           1253 [pixels]
Y_MAX:           1591 [pixels]
DET_THRESH:      26
PHOTO_THRESH:    16
SL_URL:          sw00948219000msufc0902.fits
SUN_POSTN:       288.41d {+19h 13m 37s}  -22.36d {-22d 21' 27"}
SUN_DIST:         73.86 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:       68.33d {+04h 33m 19s}  +19.34d {+19d 20' 22"}
MOON_DIST:       104.39 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      295.95,-26.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      263.93,-72.45 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 07 Jan 20 20:00:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     948219,   Seg_Num: 0
POINT_RA:        107.014d {+07h 08m 03s} (J2000)
POINT_DEC:       -83.742d {-83d 44' 30"} (J2000)
POINT_ROLL:      181.346d
IMG_START_DATE:  18855 TJD;     7 DOY;   20/01/07
IMG_START_TIME:  70891.39 SOD {19:41:31.39} UT,   902.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        8.507
N_STARS:         135
X_OFFSET:        294 [pixels]
Y_OFFSET:        632 [pixels]
X_MAX:           1253 [pixels]
Y_MAX:           1591 [pixels]
DET_THRESH:      26
PHOTO_THRESH:    16
SL_URL:          sw00948219000msufc0902.fits
SUN_POSTN:       288.41d {+19h 13m 37s}  -22.36d {-22d 21' 27"}
SUN_DIST:         73.86 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:       68.33d {+04h 33m 20s}  +19.34d {+19d 20' 24"}
MOON_DIST:       104.39 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      295.95,-26.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      263.93,-72.45 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 07 Jan 20 20:02:12 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     948219,   Seg_Num: 0
POINT_RA:        107.014d {+07h 08m 03s} (J2000)
POINT_DEC:       -83.742d {-83d 44' 30"} (J2000)
ROLL:            181.346d
IMG_START_DATE:  18855 TJD;     7 DOY;   20/01/07
IMG_START_TIME:  70891.39 SOD {19:41:31.39} UT,   902.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     600118915
X_OFFSET:        613 [pixels]
Y_OFFSET:        951 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       773
Y_GRB_POS:       1111
BINNING_INDEX:   1
IM_URL:          sw00948219000msuni0927.fits
SUN_POSTN:       288.41d {+19h 13m 38s}  -22.36d {-22d 21' 26"}
SUN_DIST:         73.86 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:       68.35d {+04h 33m 23s}  +19.34d {+19d 20' 34"}
MOON_DIST:       104.39 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      295.95,-26.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      263.93,-72.45 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 07 Jan 20 20:02:14 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     948219,   Seg_Num: 0
GRB_RA:          106.9339d {+07h 07m 44.13s} (J2000),
                 106.2175d {+07h 04m 52.19s} (current),
                 108.6850d {+07h 14m 44.40s} (1950)
GRB_DEC:         -83.7189d {-83d 43' 08.0"} (J2000),
                 -83.7507d {-83d 45' 02.5"} (current),
                 -83.6337d {-83d 38' 01.2"} (1950)
GRB_ERROR:       29.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18855 TJD;     7 DOY;   20/01/07
IMG_START_TIME:  70902.00 SOD {19:41:42.00} UT,   913.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       288.41d {+19h 13m 38s}  -22.36d {-22d 21' 26"}
SUN_DIST:         73.89 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:       68.35d {+04h 33m 23s}  +19.34d {+19d 20' 35"}
MOON_DIST:       104.37 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      295.93,-26.51 [deg] galactic lon,lat of the burst
ECL_COORDS:      263.92,-72.48 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 1.1% < P(seren) < 2.8%.

GCN Circular #26660
MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB200107.81 (trigger No 948219,07h 08m 15.74s , -83d 42m 56.5s, R=0.05) errorbox 18 sec after notice time and 69 sec after trigger time at 2020-01-07 19:27:38 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 54 deg. The sun altitude is -18.0 deg.
We detect a new optical transient at a position
```
Ra=07h 07m 37.58s
Dec= -83� 43' 07.0"
Mag=17.2
```
GCN Circular #26661
M. G. Bernardini (INAF-OAB), P. D'Avanzo (INAF-OAB), J. A. Kennea (PSU), N. J. Klingler (PSU), N. P. M. Kuin (UCL-MSSL), S. J. LaPorte (PSU), A. Y. Lien (GSFC/UMBC), F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB), M. J. Moss (GWU), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (PSU), M. H. Siegel (PSU) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
At 19:26:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200107B (trigger=948219). Swift did not slew immediately due to an observing constraint. The BAT on-board calculated location is RA, Dec 107.066, -83.716 which is
```
   RA(J2000) = 07h 08m 16s
   Dec(J2000) = -83d 42' 56"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 80 sec. The peak count rate was ~1700 counts/sec (15-350 keV), at ~35 sec after the trigger.
The XRT began observing the field at 19:41:27.6 UT, 899.0 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 106.92567, -83.7189 which is equivalent to:
```
   RA(J2000)  = 07h 07m 42.16s
   Dec(J2000) = -83d 43' 08.0"
```
with an uncertainty of 21.3 arcseconds (radius, 90% containment). This location is 56 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at https://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.49 x 10^21 cm^-2 (Willingale et al. 2013).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 902 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image processing FAILED because of no aspect solution. Results from the list of sources generated on-board are not available at this time. No correction has been made for the expected extinction corresponding to E(B-V) of 0.19.
The "B" burst name is based on the Fermi/GBM detection circular of this burst (GCN Circ. 26659).
Burst Advocate for this burst is M. G. Bernardini (grazia.bernardini AT brera.inaf.it). 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 #26670
S. D. Barthelmy(GSFC), M.G. Bernardini(INAF-OAB), J. R. Cummings(CPI), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200107B (trigger #948219) (M. G. Bernardini et al., GCN Circ. 26661). The BAT ground-calculated position is RA, Dec = 107.067, -83.716 deg which is
```
   RA(J2000)  =  07h 08m 16.0s
   Dec(J2000) = -83d 42' 56.5"
```
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 78%.
The mask weighted light curve shows complex multi-peak structures with a duration of ~100 s. The overall structure starts at ~T-40 s and lasts till ~T+80s. T90 (15-350 keV) is 86.68 +- 11.64 sec (estimated error including systematics).
The time-averaged spectrum from T-29.86 to T+77.04 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.41 +- 0.10. The fluence in the 15-150 keV band is 3.0 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+36.09 sec in the 15-150 keV band is 1.9 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/948219/BA/
GCN Circular #26671
GRB 200107B: Fermi GBM observation
S. Lesage (UAH) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 19:26:22.81 UT on 07 January 2020, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 200107B (trigger 600117987 / 200107810), which was also detected by the Swift/BAT (Bernardini et al. 2020, GCN 26661). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 47 degrees.
The GBM light curve shows a complex, multi-peaked structure with a duration (T90) of about 81 s (50-300 keV). The time-averaged spectrum from T0+4 s to T0+44 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.1 +/- 0.1 and the cutoff energy, parameterized as Epeak, is 412 +/- 138 keV.
The event fluence (10-1000 keV) in this time interval is (1.29 +/- 0.15)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+41.0 s in the 10-1000 keV band is 3.3 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"

GCN Circular #26672
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),
H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),
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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB 200107B ( M. G. Bernardini et al., GCN 26661) errorbox 891 sec after notice time and 29 sec after trigger time at 2020-01-07 19:42:11 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 54 deg. The sun altitude is -20.2 deg.
The galactic latitude b = -27 deg., longitude l = 296 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1253675
We obtain a following upper limits.

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     119 |         MASTER-SAAO |  P\ |   180 | 17.1 |        
     415 |         MASTER-SAAO |  P\ |   180 | 17.4 |        
     616 |         MASTER-SAAO |  P\ |   180 | 17.4 |        
     818 |         MASTER-SAAO |  P\ |   180 | 16.6 |        
    1231 |         MASTER-SAAO |   C |   180 | 18.3 |        
    1348 |         MASTER-SAAO |  P\ |   180 | 17.4 |        
    1550 |         MASTER-SAAO |  P\ |   180 | 17.4 |        
    1751 |         MASTER-SAAO |  P\ |   180 | 17.5 |        
    1953 |         MASTER-SAAO |  P\ |   180 | 17.3 |        
    2161 |         MASTER-SAAO |   C |   180 | 18.6 |        
    2371 |         MASTER-SAAO |   C |   180 | 18.5 |        
    2582 |         MASTER-SAAO |   C |   180 | 18.5 |        
    2792 |         MASTER-SAAO |   C |   180 | 18.5 |        
    3001 |         MASTER-SAAO |   C |   180 | 18.6 |        
    3211 |         MASTER-SAAO |   C |   180 | 18.6 |        
    3421 |         MASTER-SAAO |   C |   180 | 18.7 |        
    3632 |         MASTER-SAAO |   C |   180 | 18.5 |        
    3843 |         MASTER-SAAO |   C |   180 | 18.7 |        
    4052 |         MASTER-SAAO |   C |   180 | 18.6 |        
    4261 |         MASTER-SAAO |   C |   180 | 18.6 |        
    4480 |         MASTER-SAAO |   C |   180 | 18.7 |        
    5034 |         MASTER-SAAO |   C |   180 | 17.6 |        
    5247 |         MASTER-SAAO |   C |   180 | 18.6 |        
    5459 |         MASTER-SAAO |   C |   180 | 18.6 |        
    5671 |         MASTER-SAAO |   C |   180 | 18.6 |        
    5884 |         MASTER-SAAO |   C |   180 | 18.6 |        
    6098 |         MASTER-SAAO |   C |   180 | 18.5 |        
    6310 |         MASTER-SAAO |   C |   180 | 18.6 |        
    6523 |         MASTER-SAAO |   C |   180 | 18.5 |        
    6735 |         MASTER-SAAO |   C |   180 | 18.5 |        
    6948 |         MASTER-SAAO |   C |   180 | 18.4 |        
    7160 |         MASTER-SAAO |   C |   180 | 18.4 |        
    7373 |         MASTER-SAAO |   C |   180 | 18.5 |        
    7585 |         MASTER-SAAO |   C |   180 | 18.5 |        
    7799 |         MASTER-SAAO |   C |   180 | 18.6 |        
    8010 |         MASTER-SAAO |   C |   180 | 18.5 |        
    8224 |         MASTER-SAAO |   C |   180 | 18.5 |        
    8471 |         MASTER-SAAO |   C |   180 | 18.6 |        
    8684 |         MASTER-SAAO |   C |   180 | 18.5 |        
    8896 |         MASTER-SAAO |   C |   180 | 18.5 |        
    9109 |         MASTER-SAAO |   C |   180 | 18.5 |        
    9321 |         MASTER-SAAO |   C |   180 | 18.4 |        
    9538 |         MASTER-SAAO |   C |   180 | 18.4 |        
    9752 |         MASTER-SAAO |   C |   180 | 18.5 |        
    9963 |         MASTER-SAAO |   C |   180 | 18.3 |        
   10176 |         MASTER-SAAO |   C |   180 | 18.3 |        
   10389 |         MASTER-SAAO |   C |   180 | 18.3 |        
   10601 |         MASTER-SAAO |   C |   180 | 18.3 |

Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.

GCN Circular #26685
M. Perri (ASDC), V. D'Elia (ASDC), B. Sbarufatti (PSU), D.N. Burrows (PSU), J. D. Gropp (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), A. D'Ai (INAF-IASFPA) and M. G. Bernardini (INAF-OAB) report on behalf of the Swift-XRT team:
We have analysed 3.4 ks of XRT data for GRB 200107B (Bernardini et al. GCN Circ. 26661), from 908 s to 139.6 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The refined XRT position is RA, Dec = 106.9086, -83.7162 which is equivalent to:
```
RA (J2000): 07 07 38.07
Dec(J2000): -83 42 58.3
```
with an uncertainty of 4.0 arcsec (radius, 90% confidence).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.0 (+0.3, -0.4).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.9 (+0.5, -0.4). The best-fitting absorption column is 2.8 (+2.4, -1.3) x 10^21 cm^-2, consistent with the Galactic value of 1.5 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 3.9 x 10^-11 (5.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.8 (+2.4, -1.3) x 10^21 cm^-2
Galactic foreground: 1.5 x 10^21 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.9 (+0.5, -0.4)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00948219.
This circular is an official product of the Swift-XRT team.
GCN Circular #26693
F.E. Marshall (NASA/GSFC) and M. G. Bernardini (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200107B 903 s after the BAT trigger (Bernardini et al., GCN Circ. 26661). Some of the exposures are affected by poor attitude control, but we have selected observing times for which this is not a significant issue. A source consistent with the position of the optical source reported by Lipunov (GCN Circ. 26660) is weakly detected (2.6 sigma) in the initial UVOT exposure.
The preliminary detection and 3-sigma upper limits 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_FC           903         1052           55         19.3 (+0.5/-0.4)
v                 1059         1079           19        >18.6
b                 1157         1177           19        >18.6
u                 1133         3144          179        >19.7
w1                2777         2976          197        >19.5
w2                1208         1228           19        >18.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.19 in the direction of the burst (Schlegel et al. 1998).
Note: Technically, this should be GRB 200107A - the naming in GCN 26659 was wrong (priv. comm. S. Lesage). To avoid confusion, no re-naming was done (priv. comm. S. Barthelmy).

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Jochen Greiner, last update: 11-Jan-2020 [Disclaimer]