Gamma-ray Burst 180709A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 10:54:21 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     846868,   Seg_Num: 0
GRB_RA:           38.1151d {+02h 32m 27.6s} (J2000),
                  38.4648d {+02h 33m 51.5s} (current),
                  37.1772d {+02h 28m 42.5s} (1950)
GRB_DEC:         +60.3477d {+60d 20' 51.7"} (J2000),
                 +60.4286d {+60d 25' 43.0"} (current),
                 +60.1273d {+60d 07' 38.1"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       24 [cnts]
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39225.06 SOD {10:53:45.06} UT,   104.8 [sec] since BAT Trigger Time
CENTROID_X:      272.07,  raw= 272  [pixels]
CENTROID_Y:      256.16,  raw= 256  [pixels]
ROLL:            95.22 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -99.57
GRB_POS_XRT_Z:   -80.90
IMAGE_URL:       sw00846868000msxps_rw.img
SUN_POSTN:       108.64d {+07h 14m 34s}  +22.33d {+22d 19' 48"}
SUN_DIST:         60.97 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.15d {+03h 40m 36s}  +14.57d {+14d 34' 29"}
MOON_DIST:        47.44 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.12, -0.11 [deg] galactic lon,lat of the burst
ECL_COORDS:       58.12, 42.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 10:54:23 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     846868,   Seg_Num: 0
GRB_RA:           38.1151d {+02h 32m 27.6s} (J2000),
                  38.4648d {+02h 33m 51.5s} (current),
                  37.1772d {+02h 28m 42.5s} (1950)
GRB_DEC:         +60.3477d {+60d 20' 51.7"} (J2000),
                 +60.4286d {+60d 25' 43.0"} (current),
                 +60.1273d {+60d 07' 38.1"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       24 [cnts]
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39225.06 SOD {10:53:45.06} UT,   104.8 [sec] since BAT Trigger Time
CENTROID_X:      272.07,  raw= 272  [pixels]
CENTROID_Y:      256.16,  raw= 256  [pixels]
ROLL:            95.22 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -99.57
GRB_POS_XRT_Z:   -80.90
IMAGE_URL:       sw00846868000msxps_rw.img
SUN_POSTN:       108.64d {+07h 14m 34s}  +22.33d {+22d 19' 48"}
SUN_DIST:         60.97 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.15d {+03h 40m 36s}  +14.57d {+14d 34' 29"}
MOON_DIST:        47.44 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.12, -0.11 [deg] galactic lon,lat of the burst
ECL_COORDS:       58.12, 42.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 10:54:12 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     846868,   Seg_Num: 0
GRB_RA:           38.1151d {+02h 32m 27.62s} (J2000),
                  38.4648d {+02h 33m 51.54s} (current),
                  37.1772d {+02h 28m 42.53s} (1950)
GRB_DEC:         +60.3477d {+60d 20' 51.7"} (J2000),
                 +60.4286d {+60d 25' 43.0"} (current),
                 +60.1273d {+60d 07' 38.1"} (1950)
GRB_ERROR:       6.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       6.60e-10 [erg/cm2/sec]
GRB_SIGNIF:      4.89 [sigma]
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39225.06 SOD {10:53:45.06} UT,   104.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.16 261.64 243.69
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       108.64d {+07h 14m 34s}  +22.33d {+22d 19' 48"}
SUN_DIST:         60.97 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.15d {+03h 40m 36s}  +14.57d {+14d 34' 28"}
MOON_DIST:        47.44 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.12, -0.11 [deg] galactic lon,lat of the burst
ECL_COORDS:       58.12, 42.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.44 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 10:56:22 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     846868,   Seg_Num: 0
GRB_RA:           38.119d {+02h 32m 29s} (J2000),
                  38.469d {+02h 33m 53s} (current),
                  37.181d {+02h 28m 43s} (1950)
GRB_DEC:         +60.372d {+60d 22' 18"} (J2000),
                 +60.453d {+60d 27' 09"} (current),
                 +60.151d {+60d 09' 05"} (1950)
GRB_DATE:        18308 TJD;   190 DOY;   18/07/09
GRB_TIME:        39120.26 SOD {10:52:00.26} UT
TRIGGER_INDEX:   343
GRB_PHI:         -117.58 [deg]
GRB_THETA:        20.04 [deg]
DELTA_TIME:      -70.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.55 [sigma]
IMAGE_SIGNIF:    9.13 [sigma]
LC_URL:          sw00846868000msb.lc
SUN_POSTN:       108.64d {+07h 14m 35s}  +22.33d {+22d 19' 48"}
SUN_DIST:         60.97 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.17d {+03h 40m 41s}  +14.58d {+14d 34' 48"}
MOON_DIST:        47.46 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.11, -0.09 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       58.14, 42.54 [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 = 270.00,16.82 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 10:52:53 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     846868,   Seg_Num: 0
GRB_RA:           38.119d {+02h 32m 29s} (J2000),
                  38.469d {+02h 33m 53s} (current),
                  37.181d {+02h 28m 43s} (1950)
GRB_DEC:         +60.372d {+60d 22' 18"} (J2000),
                 +60.453d {+60d 27' 09"} (current),
                 +60.151d {+60d 09' 05"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       24235 [cnts]    Image_Peak=518 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   343     E_range: 50-350 keV
BKG_INTEN:       163404 [cnts]
BKG_TIME:        39026.76 SOD {10:50:26.76} UT
BKG_DUR:         64 [sec]
GRB_DATE:        18308 TJD;   190 DOY;   18/07/09
GRB_TIME:        39120.26 SOD {10:52:00.26} UT
GRB_PHI:         -117.58 [deg]
GRB_THETA:        20.04 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.55 [sigma]
IMAGE_SIGNIF:    9.13 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +3  +0  +0  +1 -48  +0 
SUN_POSTN:       108.64d {+07h 14m 34s}  +22.33d {+22d 19' 49"}
SUN_DIST:         60.97 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.14d {+03h 40m 33s}  +14.57d {+14d 34' 16"}
MOON_DIST:        47.46 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.11, -0.09 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       58.14, 42.54 [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 = 270.00,16.82 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 10:56:48 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.075d {+02h 32m 18s} (J2000)
POINT_DEC:       +60.377d {+60d 22' 37"} (J2000)
POINT_ROLL:      95.226d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39234.66 SOD {10:53:54.66} UT,   114.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.063
N_STARS:         47
X_OFFSET:        640 [pixels]
Y_OFFSET:        488 [pixels]
X_MAX:           1599 [pixels]
Y_MAX:           1447 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00846868000msufc0114.fits
SUN_POSTN:       108.64d {+07h 14m 35s}  +22.33d {+22d 19' 47"}
SUN_DIST:         60.99 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.17d {+03h 40m 42s}  +14.58d {+14d 34' 52"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 10:57:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.075d {+02h 32m 18s} (J2000)
POINT_DEC:       +60.377d {+60d 22' 37"} (J2000)
POINT_ROLL:      95.226d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39234.66 SOD {10:53:54.66} UT,   114.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.063
N_STARS:         47
X_OFFSET:        640 [pixels]
Y_OFFSET:        488 [pixels]
X_MAX:           1599 [pixels]
Y_MAX:           1447 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00846868000msufc0114.fits
SUN_POSTN:       108.64d {+07h 14m 35s}  +22.33d {+22d 19' 47"}
SUN_DIST:         60.99 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.18d {+03h 40m 43s}  +14.58d {+14d 34' 54"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 09 Jul 18 10:58:11 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.075d {+02h 32m 18s} (J2000)
POINT_DEC:       +60.377d {+60d 22' 37"} (J2000)
ROLL:            95.226d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39234.66 SOD {10:53:54.66} UT,   114.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552826455
X_OFFSET:        1038 [pixels]
Y_OFFSET:        957 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1198
Y_GRB_POS:       1117
BINNING_INDEX:   1
IM_URL:          sw00846868000msuni0136.fits
SUN_POSTN:       108.65d {+07h 14m 35s}  +22.33d {+22d 19' 47"}
SUN_DIST:         60.99 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.19d {+03h 40m 45s}  +14.58d {+14d 35' 05"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 09 Jul 18 10:58:20 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.075d {+02h 32m 18s} (J2000)
POINT_DEC:       +60.377d {+60d 22' 37"} (J2000)
ROLL:            95.226d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39234.66 SOD {10:53:54.66} UT,   114.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552826455
X_OFFSET:        1038 [pixels]
Y_OFFSET:        957 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1198
Y_GRB_POS:       1117
BINNING_INDEX:   1
IM_URL:          sw00846868000msuni0136.fits
SUN_POSTN:       108.65d {+07h 14m 35s}  +22.33d {+22d 19' 47"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.19d {+03h 40m 46s}  +14.59d {+14d 35' 06"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 09 Jul 18 11:02:58 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
POINT_ROLL:      95.222d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39393.20 SOD {10:56:33.20} UT,   272.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.132
N_STARS:         14
X_OFFSET:        718 [pixels]
Y_OFFSET:        637 [pixels]
X_MAX:           1677 [pixels]
Y_MAX:           1596 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00846868000msufc0272.fits
SUN_POSTN:       108.65d {+07h 14m 36s}  +22.33d {+22d 19' 46"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.24d {+03h 40m 57s}  +14.60d {+14d 35' 49"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 11:03:16 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
POINT_ROLL:      95.222d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39393.20 SOD {10:56:33.20} UT,   272.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.132
N_STARS:         14
X_OFFSET:        718 [pixels]
Y_OFFSET:        637 [pixels]
X_MAX:           1677 [pixels]
Y_MAX:           1596 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00846868000msufc0272.fits
SUN_POSTN:       108.65d {+07h 14m 36s}  +22.33d {+22d 19' 46"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.24d {+03h 40m 57s}  +14.60d {+14d 35' 52"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 09 Jul 18 11:04:19 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
ROLL:            95.222d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39393.20 SOD {10:56:33.20} UT,   272.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     552826614
X_OFFSET:        1038 [pixels]
Y_OFFSET:        957 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1198
Y_GRB_POS:       1117
BINNING_INDEX:   1
IM_URL:          sw00846868000msuni0294.fits
SUN_POSTN:       108.65d {+07h 14m 36s}  +22.33d {+22d 19' 45"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.25d {+03h 41m 00s}  +14.60d {+14d 36' 02"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 09 Jul 18 11:04:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
ROLL:            95.222d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39393.20 SOD {10:56:33.20} UT,   272.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     552826614
X_OFFSET:        1038 [pixels]
Y_OFFSET:        957 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1198
Y_GRB_POS:       1117
BINNING_INDEX:   1
IM_URL:          sw00846868000msuni0294.fits
SUN_POSTN:       108.65d {+07h 14m 36s}  +22.33d {+22d 19' 45"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.25d {+03h 41m 00s}  +14.60d {+14d 36' 04"}
MOON_DIST:        47.47 [deg]
MOON_ILLUM:      19 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 09 Jul 18 11:09:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
POINT_ROLL:      95.221d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39996.22 SOD {11:06:36.22} UT,   876.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.925
N_STARS:         101
X_OFFSET:        478 [pixels]
Y_OFFSET:        397 [pixels]
X_MAX:           1917 [pixels]
Y_MAX:           1836 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00846868000msufc0875.fits
SUN_POSTN:       108.65d {+07h 14m 37s}  +22.33d {+22d 19' 44"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.30d {+03h 41m 12s}  +14.61d {+14d 36' 50"}
MOON_DIST:        47.46 [deg]
MOON_ILLUM:      18 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 11:09:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
POINT_ROLL:      95.221d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39996.22 SOD {11:06:36.22} UT,   876.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.925
N_STARS:         101
X_OFFSET:        478 [pixels]
Y_OFFSET:        397 [pixels]
X_MAX:           1917 [pixels]
Y_MAX:           1836 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00846868000msufc0875.fits
SUN_POSTN:       108.65d {+07h 14m 37s}  +22.33d {+22d 19' 44"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.30d {+03h 41m 12s}  +14.61d {+14d 36' 51"}
MOON_DIST:        47.46 [deg]
MOON_ILLUM:      18 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 09 Jul 18 11:10:01 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     846868,   Seg_Num: 0
GRB_RA:           38.1178d {+02h 32m 28.27s} (J2000),
                  38.4675d {+02h 33m 52.19s} (current),
                  37.1799d {+02h 28m 43.17s} (1950)
GRB_DEC:         +60.3489d {+60d 20' 56.0"} (J2000),
                 +60.4298d {+60d 25' 47.3"} (current),
                 +60.1285d {+60d 07' 42.4"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39526.00 SOD {10:58:46.00} UT,   405.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       108.65d {+07h 14m 37s}  +22.33d {+22d 19' 43"}
SUN_DIST:         60.98 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.30d {+03h 41m 13s}  +14.62d {+14d 36' 54"}
MOON_DIST:        47.43 [deg]
MOON_ILLUM:      18 [%]
GAL_COORDS:      135.12, -0.11 [deg] galactic lon,lat of the burst
ECL_COORDS:       58.12, 42.52 [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 1.1% < P(seren) < 2.8%.

GCN Circular #22930
F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC), A. D'Ai (INAF-IASFPA), V. D'Elia (ASDC), P. A. Evans (U Leicester), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (GSFC/UMBC) and K. L. Page (U Leicester) report on behalf of the Neil Gehrels Swift Observatory Team:
At 10:52:00 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 180709A (trigger=846868). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 38.119, +60.372 which is
```
   RA(J2000) = 02h 32m 29s
   Dec(J2000) = +60d 22' 18"
```
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 30 sec. The peak count rate was ~800 counts/sec (15-350 keV), at ~6 sec after the trigger.
The XRT began observing the field at 10:53:45.0 UT, 104.8 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 38.1178, 60.3490 which is equivalent to:
```
   RA(J2000)  = 02h 32m 28.27s
   Dec(J2000) = +60d 20' 56.5"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 82 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 http://www.swift.ac.uk/sper. No spectrum from the promptly downlinked event data is yet available to determine the column density.
The initial flux in the 2.5 s image was 6.60e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 114 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 large, but uncertain, extinction expected.
Burst Advocate for this burst is F. E. Marshall (marshall AT milkyway.gsfc.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/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 09 Jul 18 11:12:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
ROLL:            95.221d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39996.22 SOD {11:06:36.22} UT,   876.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552827217
X_OFFSET:        1037 [pixels]
Y_OFFSET:        956 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1197
Y_GRB_POS:       1116
BINNING_INDEX:   1
IM_URL:          sw00846868000msuni0897.fits
SUN_POSTN:       108.66d {+07h 14m 37s}  +22.33d {+22d 19' 43"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.33d {+03h 41m 19s}  +14.62d {+14d 37' 16"}
MOON_DIST:        47.46 [deg]
MOON_ILLUM:      18 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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:     Mon 09 Jul 18 11:12:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     846868,   Seg_Num: 0
POINT_RA:         38.072d {+02h 32m 17s} (J2000)
POINT_DEC:       +60.376d {+60d 22' 33"} (J2000)
ROLL:            95.221d
IMG_START_DATE:  18308 TJD;   190 DOY;   18/07/09
IMG_START_TIME:  39996.22 SOD {11:06:36.22} UT,   876.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552827217
X_OFFSET:        1037 [pixels]
Y_OFFSET:        956 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1197
Y_GRB_POS:       1116
BINNING_INDEX:   1
IM_URL:          sw00846868000msuni0897.fits
SUN_POSTN:       108.66d {+07h 14m 37s}  +22.33d {+22d 19' 43"}
SUN_DIST:         61.00 [deg]   Sun_angle= 4.7 [hr] (West of Sun)
MOON_POSTN:       55.33d {+03h 41m 19s}  +14.62d {+14d 37' 18"}
MOON_DIST:        47.46 [deg]
MOON_ILLUM:      18 [%]
GAL_COORDS:      135.09, -0.09 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       58.11, 42.56 [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 Circular #22933
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1493 s of XRT Photon Counting mode data and 1 UVOT images for GRB 180709A, 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 = 38.11784, +60.34912 which is equivalent to:
```
RA (J2000): 02h 32m 28.28s
Dec (J2000): +60d 20' 56.8"
```
with an uncertainty of 1.8 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 #22934
Nat Butler (ASU), Alan M. Watson (UNAM), aRosa L. Becerra (UNAM), William H. Lee (UNAM), Carlos Rom�n-Z��iga (UNAM), Alexander Kutyrev (GSFC), and Eleonora Troja (GSFC) report:
We observed the field of GRB 180709A (Marshall et al., GCN Circ 22930) with the COATLI 50-cm telescope and interim imager at the Observatorio Astron�mico Nacional on the Sierra de San Pedro M�rtir ( http://coatli.astroscu.unam.mx) from 2018-07-09 10:53:05.6 to 11:26:07.1 UTC (from 65.4 seconds after the trigger or 14.5 seconds after the alert to 0.55 hours after the trigger), obtaining a total of 695 seconds of exposure in the w filter.
For a source within the XRT error region (Marshall et al., GCN Circ. 22930), we determine a 3-sigma upper limit of
w > 21.3
This magnitude is calibrated against the USNO-B1 catalog (adjusted to an approximate AB system) and is not corrected for Galactic extinction in the direction of the GRB.
We thank the COATLI technical team (Fernando �ngeles, Oscar Chapa, Salvador Cuevas, Alejandro Farah, Jorge Fuentes, Rosal�a Langarica, Fernando Quir�s, and Carlos Tejada) and the staff of the Observatorio Astron�mico Nacional.
GCN Circular #22935
J. P. Halpern (Columbia U.) reports:
I observed the field of Swift GRB 180709A (Marshall et al., GCN 22930) with an SDSS r filter using the 1.3m McGraw Hill telescope of the MDM Observatory, beginning 17.6 minutes after the trigger. Four 5-minute exposures were obtained in morning twilight. Upper limits at the enhanced Swift-XRT position of Beardmore et al. (GCN 22933) are listed below, as calibrated to Pan-STARRS1 photometry.
```
       ---------------------------------------------
        Date(UT)  Start(UT)  Mid-time T-T0   r(mag)
       ---------------------------------------------
        July 9     11:09:34      1194 s      > 22.0
        July 9     11:14:41      1501 s      > 21.8
        July 9     11:19:47      1807 s      > 21.4
        July 9     11:24:54      2114 s      > 21.1
       ---------------------------------------------
```
These magnitudes are not corrected for Galactic extinction, which is considerable at this Galactic latitude of -0.1 deg. According to the NED implementation of Schlafly & Finkbeiner (2011), A_r = 6.1 mag.
GCN Circular #22936
S. J. LaPorte (PSU), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), P.A. Evans (U. Leicester), S.L. Gibson (U. Leicester), Z. Liu (NAOC / U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB) and F.E. Marshall report on behalf of the Swift-XRT team:
We have analysed 6.8 ks of XRT data for GRB 180709A (Marshall et al. GCN Circ. 22930), from 111 s to 24.8 ks after the BAT trigger. The data comprise 277 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 22933).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.95 (+0.09, -0.08).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.41 (+/-0.20). The best-fitting absorption column is 1.9 (+/-0.4) x 10^22 cm^-2, in excess of the Galactic value of 8.9 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.7 (+0.5, -0.4) and a best-fitting absorption column of 3.5 (+1.2, -1.0) x 10^22 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 8.4 x 10^-11 (1.6 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     3.5 (+1.2, -1.0) x 10^22 cm^-2
Galactic foreground: 8.9 x 10^21 cm^-2
Excess significance: 4.3 sigma
Photon index:	     1.7 (+0.5, -0.4)
```
If the light curve continues to decay with a power-law decay index of 1.95, the count rate at T+24 hours will be 2.1 x 10^-5 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.8 x 10^-15 (3.4 x 10^-15) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00846868.
This circular is an official product of the Swift-XRT team.
GCN Circular #22937
A. A. Breeveld (UCL-MSSL), S. W. K. Emery (UCL-MSSL) and F. E. Marshall (NASA/GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 180709A 115 s after the BAT trigger (Marshall et al., GCN Circ. 22930). No optical afterglow consistent with the XRT position (Beardmore et al., GCN Circ. 22933) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           115          264          147         >20.5
u_FC               273          523          246         >19.6
v                  604          797           39         >18.0
b                  529          723           39         >19.0
uvw1               654          846           39         >17.7
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 2.72 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #22938
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 180709A (trigger #846868) (Marshall et al., GCN Circ. 22930). The BAT ground-calculated position is RA, Dec = 38.086, 60.333 deg which is
```
  RA(J2000)  =  02h 32m 20.7s
  Dec(J2000) = +60d 19' 59.4"
```
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 81%.
The mask-weighted light curve shows a single-peaked structure that starts at ~T0 and peaks at ~T+10 s. The main structure ends at ~T+40 s, with some tail emission lasting till ~T+240 s. T90 (15-350 keV) is 215.1 +- 28.9 sec (estimated error including systematics).
The time-averaged spectrum from T+0.54 to T+243.46 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.37 +- 0.23. The fluence in the 15-150 keV band is 1.4 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+8.73 sec in the 15-150 keV band is 0.6 +- 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/846868/BA/
GCN Circular #22939
I. Carrasco (Univ. de Malaga), Y. Hu, E. Fernandez-Garcia, J. C. Tello and A. J. Castro-Tirado (IAA-CSIC), D. Hiriart and W. H. Lee (UNAM), S. Jeong and I. H. Park (SKKU), M. D. Caballero-Garcia (ASU-CAS, CZ) and R. Cunniffe (Inst. of Physics, CZ) on behalf of a larger collaboration, report:
The 60 cm BOOTES-5/JGT at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) automatically responded in 21s (and 74s after the GRB onset) to the Swift trigger of GRB 180709A (Marshall et al., GCN 22930). The first unfiltered images (10 s exposures) were obtained at 10:53:14 UT. At the position of the Swift X-ray afterglow, no optical afterglow is detected down 18.1 mag. Furthermore, on the co-add of the images obtained until 11:43:04 UT no afterglow is detected down to 21 mag, consistent with the limits reported by Butler et al. (GCN 22934), Halpern (GCN 22935) and Breeveld et al. GCN 22937).
We thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for its excellent support.

Back to JG's homepage

Jochen Greiner, last update: 09-Jul-2018 [Disclaimer]