Gamma-ray Burst 200713A

(All information courtesy of the instrument teams.)

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE 
NOTICE_DATE:     Mon 13 Jul 20 11:53:48 UT 
NOTICE_TYPE:     Swift-BAT GRB Position 
TRIGGER_NUM:     982201,   Seg_Num: 0 
GRB_RA:           76.962d {+05h 07m 51s} (J2000), 
                  77.153d {+05h 08m 37s} (current), 
                  76.496d {+05h 05m 59s} (1950) 
GRB_DEC:         -32.825d {-32d 49' 30"} (J2000), 
                 -32.800d {-32d 47' 58"} (current), 
                 -32.889d {-32d 53' 20"} (1950) 
GRB_ERROR:       3.00 [arcmin radius, statistical only] 
GRB_INTEN:       0 [cnts]    Image_Peak=1318 [image_cnts] 
TRIGGER_DUR:     64.000 [sec]  
TRIGGER_INDEX:   20000     E_range: 15-50 keV 
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT 
BKG_DUR:         0 [sec] 
GRB_DATE:        19043 TJD;   195 DOY;   20/07/13 
GRB_TIME:        42174.72 SOD {11:42:54.72} UT 
GRB_PHI:         -174.13 [deg] 
GRB_THETA:        43.65 [deg] 
SOLN_STATUS:     0x13 
RATE_SIGNIF:     0.00 [sigma] 
IMAGE_SIGNIF:    7.86 [sigma] 
MERIT_PARAMS:     +1  +0  +0  +6  +1  -2  +0  +0 -42  +0  
SUN_POSTN:       113.28d {+07h 33m 08s}  +21.71d {+21d 42' 41"} 
SUN_DIST:         64.51 [deg]   Sun_angle= 2.4 [hr] (West of Sun) 
MOON_POSTN:       26.90d {+01h 47m 36s}   +6.13d {+06d 07' 49"} 
MOON_DIST:        61.54 [deg] 
MOON_ILLUM:      45 [%] 
GAL_COORDS:      235.56,-35.02 [deg] galactic lon,lat of the burst (or transient) 
ECL_COORDS:       70.50,-55.39 [deg] ecliptic lon,lat of the burst (or transient) 
COMMENTS:        SWIFT-BAT GRB Coordinates.   
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;   
COMMENTS:        probably due to it occurring during a Malindi downlink session.   
COMMENTS:        This is an image trigger. (The RATE_SIGNIF & BKG_{INTEN, TIME\
, DUR} are undefined.)   
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 = 17.45,-20.06 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:54:48 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     982201,   Seg_Num: 0
GRB_RA:           76.962d {+05h 07m 51s} (J2000),
                  77.153d {+05h 08m 37s} (current),
                  76.496d {+05h 05m 59s} (1950)
GRB_DEC:         -32.825d {-32d 49' 30"} (J2000),
                 -32.800d {-32d 47' 58"} (current),
                 -32.889d {-32d 53' 20"} (1950)
GRB_DATE:        19043 TJD;   195 DOY;   20/07/13
GRB_TIME:        42174.72 SOD {11:42:54.72} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -174.13 [deg]
GRB_THETA:        43.65 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.86 [sigma]
LC_URL:          sw00982201000msb.lc
SUN_POSTN:       113.28d {+07h 33m 08s}  +21.71d {+21d 42' 40"}
SUN_DIST:         64.51 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.91d {+01h 47m 37s}   +6.13d {+06d 08' 01"}
MOON_DIST:        61.54 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.56,-35.02 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       70.50,-55.39 [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 an image 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 = 17.45,-20.06 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:54:21 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     982201,   Seg_Num: 0
GRB_RA:           76.9494d {+05h 07m 47.85s} (J2000),
                  77.1407d {+05h 08m 33.76s} (current),
                  76.4838d {+05h 05m 56.11s} (1950)
GRB_DEC:         -32.8171d {-32d 49' 01.5"} (J2000),
                 -32.7915d {-32d 47' 29.3"} (current),
                 -32.8811d {-32d 52' 51.8"} (1950)
GRB_ERROR:       5.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.27e-09 [erg/cm2/sec]
GRB_SIGNIF:      8.00 [sigma]
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42324.78 SOD {11:45:24.78} UT,   150.1 [sec] since BAT Trigger Time
TAM[0-3]:        327.61 237.19 261.39 243.65
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       113.28d {+07h 33m 08s}  +21.71d {+21d 42' 41"}
SUN_DIST:         64.51 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.90d {+01h 47m 37s}   +6.13d {+06d 07' 56"}
MOON_DIST:        61.53 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.55,-35.03 [deg] galactic lon,lat of the burst
ECL_COORDS:       70.49,-55.38 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.79 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:54:34 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     982201,   Seg_Num: 0
GRB_RA:           76.9494d {+05h 07m 47.8s} (J2000),
                  77.1407d {+05h 08m 33.7s} (current),
                  76.4838d {+05h 05m 56.1s} (1950)
GRB_DEC:         -32.8171d {-32d 49' 01.5"} (J2000),
                 -32.7915d {-32d 47' 29.3"} (current),
                 -32.8811d {-32d 52' 51.8"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       64 [cnts]
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42324.78 SOD {11:45:24.78} UT,   150.1 [sec] since BAT Trigger Time
CENTROID_X:      287.24,  raw= 287  [pixels]
CENTROID_Y:      330.49,  raw= 330  [pixels]
ROLL:            37.53 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   76.36
GRB_POS_XRT_Z:   -47.51
IMAGE_URL:       sw00982201000msxps_rw.img
SUN_POSTN:       113.28d {+07h 33m 08s}  +21.71d {+21d 42' 41"}
SUN_DIST:         64.51 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.90d {+01h 47m 37s}   +6.13d {+06d 07' 58"}
MOON_DIST:        61.53 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.55,-35.03 [deg] galactic lon,lat of the burst
ECL_COORDS:       70.49,-55.38 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:55:39 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     982201,   Seg_Num: 0
POINT_RA:         76.960d {+05h 07m 50s} (J2000)
POINT_DEC:       -32.840d {-32d 50' 24"} (J2000)
POINT_ROLL:      37.527d
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42334.09 SOD {11:45:34.09} UT,   159.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.629
N_STARS:         29
X_OFFSET:        520 [pixels]
Y_OFFSET:        448 [pixels]
X_MAX:           1479 [pixels]
Y_MAX:           1407 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00982201000msufc0159.fits
SUN_POSTN:       113.29d {+07h 33m 08s}  +21.71d {+21d 42' 40"}
SUN_DIST:         64.52 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.91d {+01h 47m 39s}   +6.14d {+06d 08' 11"}
MOON_DIST:        61.54 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.58,-35.02 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.50,-55.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:54:38 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     982201,   Seg_Num: 0
GRB_RA:           76.9494d {+05h 07m 47.8s} (J2000),
                  77.1407d {+05h 08m 33.7s} (current),
                  76.4838d {+05h 05m 56.1s} (1950)
GRB_DEC:         -32.8171d {-32d 49' 01.5"} (J2000),
                 -32.7915d {-32d 47' 29.3"} (current),
                 -32.8811d {-32d 52' 51.8"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       64 [cnts]
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42324.78 SOD {11:45:24.78} UT,   150.1 [sec] since BAT Trigger Time
CENTROID_X:      287.24,  raw= 287  [pixels]
CENTROID_Y:      330.49,  raw= 330  [pixels]
ROLL:            37.53 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   76.36
GRB_POS_XRT_Z:   -47.51
IMAGE_URL:       sw00982201000msxps_rw.img
SUN_POSTN:       113.28d {+07h 33m 08s}  +21.71d {+21d 42' 41"}
SUN_DIST:         64.51 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.90d {+01h 47m 37s}   +6.13d {+06d 07' 59"}
MOON_DIST:        61.53 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.55,-35.03 [deg] galactic lon,lat of the burst
ECL_COORDS:       70.49,-55.38 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:55:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     982201,   Seg_Num: 0
POINT_RA:         76.960d {+05h 07m 50s} (J2000)
POINT_DEC:       -32.840d {-32d 50' 24"} (J2000)
POINT_ROLL:      37.527d
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42334.09 SOD {11:45:34.09} UT,   159.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.629
N_STARS:         29
X_OFFSET:        520 [pixels]
Y_OFFSET:        448 [pixels]
X_MAX:           1479 [pixels]
Y_MAX:           1407 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00982201000msufc0159.fits
SUN_POSTN:       113.29d {+07h 33m 08s}  +21.71d {+21d 42' 40"}
SUN_DIST:         64.52 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.91d {+01h 47m 39s}   +6.14d {+06d 08' 14"}
MOON_DIST:        61.54 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.58,-35.02 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.50,-55.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:57:46 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     982201,   Seg_Num: 0
POINT_RA:         76.960d {+05h 07m 50s} (J2000)
POINT_DEC:       -32.840d {-32d 50' 24"} (J2000)
ROLL:            37.527d
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42334.09 SOD {11:45:34.09} UT,   159.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     616333559
X_OFFSET:        798 [pixels]
Y_OFFSET:        689 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       958
Y_GRB_POS:       849
BINNING_INDEX:   1
IM_URL:          sw00982201000msuni0185.fits
SUN_POSTN:       113.29d {+07h 33m 09s}  +21.71d {+21d 42' 39"}
SUN_DIST:         64.52 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.93d {+01h 47m 43s}   +6.14d {+06d 08' 36"}
MOON_DIST:        61.53 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.58,-35.02 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.50,-55.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 11:58:03 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     982201,   Seg_Num: 0
POINT_RA:         76.960d {+05h 07m 50s} (J2000)
POINT_DEC:       -32.840d {-32d 50' 24"} (J2000)
ROLL:            37.527d
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42334.09 SOD {11:45:34.09} UT,   159.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     616333559
X_OFFSET:        798 [pixels]
Y_OFFSET:        689 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       958
Y_GRB_POS:       849
BINNING_INDEX:   1
IM_URL:          sw00982201000msuni0185.fits
SUN_POSTN:       113.29d {+07h 33m 09s}  +21.71d {+21d 42' 39"}
SUN_DIST:         64.52 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.93d {+01h 47m 43s}   +6.14d {+06d 08' 39"}
MOON_DIST:        61.53 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.58,-35.02 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.50,-55.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 12:01:28 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     982201,   Seg_Num: 0
POINT_RA:         76.961d {+05h 07m 51s} (J2000)
POINT_DEC:       -32.841d {-32d 50' 26"} (J2000)
POINT_ROLL:      37.524d
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42492.10 SOD {11:48:12.10} UT,   317.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.580
N_STARS:         23
X_OFFSET:        478 [pixels]
Y_OFFSET:        369 [pixels]
X_MAX:           1437 [pixels]
Y_MAX:           1328 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00982201000msufc0317.fits
SUN_POSTN:       113.29d {+07h 33m 09s}  +21.71d {+21d 42' 38"}
SUN_DIST:         64.52 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.96d {+01h 47m 50s}   +6.16d {+06d 09' 19"}
MOON_DIST:        61.52 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.58,-35.02 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.50,-55.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 12:01:44 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     982201,   Seg_Num: 0
POINT_RA:         76.961d {+05h 07m 51s} (J2000)
POINT_DEC:       -32.841d {-32d 50' 26"} (J2000)
POINT_ROLL:      37.524d
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42492.10 SOD {11:48:12.10} UT,   317.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.580
N_STARS:         23
X_OFFSET:        478 [pixels]
Y_OFFSET:        369 [pixels]
X_MAX:           1437 [pixels]
Y_MAX:           1328 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00982201000msufc0317.fits
SUN_POSTN:       113.29d {+07h 33m 09s}  +21.71d {+21d 42' 38"}
SUN_DIST:         64.52 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.96d {+01h 47m 50s}   +6.16d {+06d 09' 22"}
MOON_DIST:        61.52 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.58,-35.02 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       70.50,-55.40 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #28088
A. Y. Lien (GSFC/UMBC), E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC), V. D'Elia (SSDC), J.D. Gropp (PSU), N. J. Klingler (PSU), S. Laha (GSFC/UMBC/CRESST), K. L. Page (U Leicester) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
At 11:42:54 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 200713A (trigger=982201). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 76.962, -32.825, which is
```
   RA(J2000)  =  05h 07m 51s
   Dec(J2000) = -32d 49' 30"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is the usual for image triggers, the light curve does not show anything.
The XRT began observing the field at 11:45:24.7 UT, 150.1 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 76.9492, -32.8144 which is equivalent to:
```
   RA(J2000)  = 05h 07m 47.81s
   Dec(J2000) = -32d 48' 51.7"
```
with an uncertainty of 2.7 arcseconds (radius, 90% containment). This location is 54 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.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.99 x 10^20 cm^-2 (Willingale et al. 2013).
The initial flux in the 2.5 s image was 1.27e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 159 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is A. Y. Lien (amy.y.lien AT nasa.gov). 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 13 Jul 20 12:02:37 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     982201,   Seg_Num: 0
GRB_RA:           76.9492d {+05h 07m 47.80s} (J2000),
                  77.1405d {+05h 08m 33.71s} (current),
                  76.4836d {+05h 05m 56.06s} (1950)
GRB_DEC:         -32.8143d {-32d 48' 51.4"} (J2000),
                 -32.7887d {-32d 47' 19.2"} (current),
                 -32.8783d {-32d 52' 41.7"} (1950)
GRB_ERROR:       2.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19043 TJD;   195 DOY;   20/07/13
IMG_START_TIME:  42461.00 SOD {11:47:41.00} UT,   286.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       113.29d {+07h 33m 10s}  +21.71d {+21d 42' 38"}
SUN_DIST:         64.51 [deg]   Sun_angle= 2.4 [hr] (West of Sun)
MOON_POSTN:       26.97d {+01h 47m 52s}   +6.16d {+06d 09' 32"}
MOON_DIST:        61.50 [deg]
MOON_ILLUM:      45 [%]
GAL_COORDS:      235.54,-35.03 [deg] galactic lon,lat of the burst
ECL_COORDS:       70.49,-55.37 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
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:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN Circular #28089
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 208 s of XRT Photon Counting mode data and 1 UVOT images for GRB 200713A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 76.94990, -32.81475 which is equivalent to:
```
RA (J2000): 05h 07m 47.98s
Dec (J2000): -32d 48' 53.1"
```
with an uncertainty of 2.1 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #28092
M. Perri (ASDC), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), D.N. Burrows (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester) and A.Y. Lien report on behalf of the Swift-XRT team:
We have analysed 6.2 ks of XRT data for GRB 200713A (Lien et al. GCN Circ. 28088), from 156 s to 62.7 ks after the BAT trigger. The data comprise 128 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 28089).
The light curve can be modelled with an initial power-law decay with an index of alpha=5.1 (+/-0.3), followed by a break at T+358 s to an alpha of 0.41 (+0.04, -0.05).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 3.71 (+0.26, -0.24). The best-fitting absorption column is 3.2 (+/-0.5) x 10^21 cm^-2, in excess of the Galactic value of 2.0 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.13 (+0.18, -0.17) and a best-fitting absorption column of 1.7 (+/-0.5) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.2 x 10^-11 (4.5 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.7 (+/-0.5) x 10^21 cm^-2
Galactic foreground: 2.0 x 10^20 cm^-2
Excess significance: 5.0 sigma
Photon index:	     2.13 (+0.18, -0.17)
```
If the light curve continues to decay with a power-law decay index of 0.41, the count rate at T+24 hours will be 0.059 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.9 x 10^-12 (2.7 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00982201.
This circular is an official product of the Swift-XRT team.
GCN Circular #28096
T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), 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) (i.e. the Swift-BAT team):
Using the data set from T-100 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200713A (trigger #982201) (Lien et al., GCN Circ. 28088). The BAT ground-calculated position is RA, Dec = 76.941, -32.846 deg which is
```
   RA(J2000)  =  05h 07m 45.8s
   Dec(J2000) = -32d 50' 47.1"
```
with an uncertainty of 2.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 46%.
The mask-weighted light curve shows several weak overlapping pulses that start at ~T+20 s and end at ~T+80 s. T90 (15-350 keV) is 48.98 +- 9.52 sec (estimated error including systematics).
The time-averaged spectrum from T+18.45 to T+74.94 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.48 +- 0.32. The fluence in the 15-150 keV band is 9.0 +- 1.6 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+49.94 sec in the 15-150 keV band is 0.8 +- 0.3 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/982201/BA/

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Jochen Greiner, last update: 14-Jul-2020 [Disclaimer]