Gamma-ray Burst 180630A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:12:06 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     845443,   Seg_Num: 0
GRB_RA:           48.810d {+03h 15m 14s} (J2000),
                  47.329d {+03h 09m 19s} (current),
                  53.259d {+03h 33m 02s} (1950)
GRB_DEC:         -87.482d {-87d 28' 54"} (J2000),
                 -87.413d {-87d 24' 46"} (current),
                 -87.658d {-87d 39' 27"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3778 [cnts]    Image_Peak=180 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   148     E_range: 25-100 keV
BKG_INTEN:       24254 [cnts]
BKG_TIME:        40298.81 SOD {11:11:38.81} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18299 TJD;   181 DOY;   18/06/30
GRB_TIME:        40311.80 SOD {11:11:51.80} UT
GRB_PHI:         -147.17 [deg]
GRB_THETA:        35.33 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     11.53 [sigma]
IMAGE_SIGNIF:    7.75 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -2  +0  +0 +36  +0 
SUN_POSTN:        99.39d {+06h 37m 34s}  +23.16d {+23d 09' 19"}
SUN_DIST:        111.55 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.46d {+20h 21m 51s}  -19.24d {-19d 14' 34"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.24,-29.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      274.51,-68.40 [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 = 160.80,-17.62 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(3.0<100sec) coincident with the FERMI_GBM event (trignum=552049919).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:12:19 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     552049919
GRB_RA:           16.217d {+01h 04m 52s} (J2000),
                  16.224d {+01h 04m 54s} (current),
                  16.214d {+01h 04m 51s} (1950)
GRB_DEC:         -82.917d {-82d 55' 00"} (J2000),
                 -82.818d {-82d 49' 03"} (current),
                 -83.184d {-83d 11' 02"} (1950)
GRB_ERROR:       9.45 [deg radius, statistical plus systematic]
GRB_INTEN:       277 [cnts/sec]
DATA_SIGNIF:     7.50 [sigma]
INTEG_TIME:      0.512 [sec]
GRB_DATE:        18299 TJD;   181 DOY;   18/06/30
GRB_TIME:        40314.41 SOD {11:11:54.41} UT
GRB_PHI:         108.00 [deg]
GRB_THETA:        25.00 [deg]
DATA_TIME_SCALE: 0.5120 [sec]
HARD_RATIO:      2.10
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      59%  GRB
2nd_MOST_LIKELY:  22%  Distant Particles
DETECTORS:       0,0,0, 0,0,0, 1,0,0, 1,0,0, 0,0,
SUN_POSTN:        99.39d {+06h 37m 34s}  +23.16d {+23d 09' 19"}
SUN_DIST:        112.11 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:      305.47d {+20h 21m 52s}  -19.24d {-19d 14' 33"}
MOON_DIST:        68.54 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      302.43,-34.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      288.06,-67.54 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2018/bn180630467/quicklook/glg_lc_medres34_bn180630467.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 108.18,-23.50 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=845443).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:12:29 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      59
TRIGGER_NUM:     552049919
GRB_RA:           15.783d {+01h 03m 08s} (J2000),
                  15.796d {+01h 03m 11s} (current),
                  15.763d {+01h 03m 03s} (1950)
GRB_DEC:         -82.917d {-82d 55' 00"} (J2000),
                 -82.818d {-82d 49' 02"} (current),
                 -83.185d {-83d 11' 04"} (1950)
GRB_ERROR:       6.48 [deg radius, statistical plus systematic]
GRB_INTEN:       254 [cnts/sec]
DATA_SIGNIF:     14.40 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        18299 TJD;   181 DOY;   18/06/30
GRB_TIME:        40314.41 SOD {11:11:54.41} UT
GRB_PHI:         108.00 [deg]
GRB_THETA:        25.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      2.18
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      66%  GRB
2nd_MOST_LIKELY:  20%  Generic SGR
DETECTORS:       0,0,0, 0,0,0, 1,0,0, 1,0,0, 0,0,
SUN_POSTN:        99.39d {+06h 37m 34s}  +23.16d {+23d 09' 19"}
SUN_DIST:        112.17 [deg]   Sun_angle= 5.6 [hr] (West of Sun)
MOON_POSTN:      305.47d {+20h 21m 52s}  -19.24d {-19d 14' 33"}
MOON_DIST:        68.49 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      302.50,-34.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      288.06,-67.49 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2018/bn180630467/quicklook/glg_lc_medres34_bn180630467.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 108.18,-23.50 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the SWIFT_BAT event (trignum=845443).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:13:48 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     845443,   Seg_Num: 0
GRB_RA:           48.9475d {+03h 15m 47.3s} (J2000),
                  47.4653d {+03h 09m 51.6s} (current),
                  53.3982d {+03h 33m 35.5s} (1950)
GRB_DEC:         -87.4786d {-87d 28' 42.9"} (J2000),
                 -87.4100d {-87d 24' 35.8"} (current),
                 -87.6538d {-87d 39' 13.5"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       29 [cnts]
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40393.40 SOD {11:13:13.40} UT,   81.6 [sec] since BAT Trigger Time
CENTROID_X:      277.84,  raw= 278  [pixels]
CENTROID_Y:      292.46,  raw= 292  [pixels]
ROLL:            50.01 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -13.99
GRB_POS_XRT_Z:   -67.31
IMAGE_URL:       sw00845443000msxps_rw.img
SUN_POSTN:        99.39d {+06h 37m 35s}  +23.16d {+23d 09' 19"}
SUN_DIST:        111.54 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.48d {+20h 21m 55s}  -19.24d {-19d 14' 27"}
MOON_DIST:        71.32 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.23,-29.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      274.50,-68.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:13:38 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     845443,   Seg_Num: 0
GRB_RA:           48.9475d {+03h 15m 47.39s} (J2000),
                  47.4653d {+03h 09m 51.66s} (current),
                  53.3982d {+03h 33m 35.56s} (1950)
GRB_DEC:         -87.4786d {-87d 28' 42.9"} (J2000),
                 -87.4100d {-87d 24' 35.8"} (current),
                 -87.6538d {-87d 39' 13.5"} (1950)
GRB_ERROR:       6.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       6.12e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.38 [sigma]
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40393.40 SOD {11:13:13.40} UT,   81.6 [sec] since BAT Trigger Time
TAM[0-3]:        327.68 237.18 261.72 243.63
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        99.39d {+06h 37m 35s}  +23.16d {+23d 09' 19"}
SUN_DIST:        111.54 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.48d {+20h 21m 54s}  -19.24d {-19d 14' 28"}
MOON_DIST:        71.32 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.23,-29.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      274.50,-68.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.41 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:13:50 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     845443,   Seg_Num: 0
GRB_RA:           48.9475d {+03h 15m 47.3s} (J2000),
                  47.4653d {+03h 09m 51.6s} (current),
                  53.3982d {+03h 33m 35.5s} (1950)
GRB_DEC:         -87.4786d {-87d 28' 42.9"} (J2000),
                 -87.4100d {-87d 24' 35.8"} (current),
                 -87.6538d {-87d 39' 13.5"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       29 [cnts]
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40393.40 SOD {11:13:13.40} UT,   81.6 [sec] since BAT Trigger Time
CENTROID_X:      277.84,  raw= 278  [pixels]
CENTROID_Y:      292.46,  raw= 292  [pixels]
ROLL:            50.01 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -13.99
GRB_POS_XRT_Z:   -67.31
IMAGE_URL:       sw00845443000msxps_rw.img
SUN_POSTN:        99.39d {+06h 37m 35s}  +23.16d {+23d 09' 19"}
SUN_DIST:        111.54 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.48d {+20h 21m 55s}  -19.24d {-19d 14' 27"}
MOON_DIST:        71.32 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.23,-29.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      274.50,-68.40 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:15:33 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     845443,   Seg_Num: 0
GRB_RA:           48.810d {+03h 15m 14s} (J2000),
                  47.329d {+03h 09m 19s} (current),
                  53.259d {+03h 33m 02s} (1950)
GRB_DEC:         -87.482d {-87d 28' 54"} (J2000),
                 -87.413d {-87d 24' 46"} (current),
                 -87.658d {-87d 39' 27"} (1950)
GRB_DATE:        18299 TJD;   181 DOY;   18/06/30
GRB_TIME:        40311.80 SOD {11:11:51.80} UT
TRIGGER_INDEX:   148
GRB_PHI:         -147.17 [deg]
GRB_THETA:        35.33 [deg]
DELTA_TIME:      -18.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.53 [sigma]
IMAGE_SIGNIF:    7.75 [sigma]
LC_URL:          sw00845443000msb.lc
SUN_POSTN:        99.40d {+06h 37m 35s}  +23.16d {+23d 09' 19"}
SUN_DIST:        111.55 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.49d {+20h 21m 58s}  -19.24d {-19d 14' 20"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.24,-29.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      274.51,-68.40 [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 = 160.80,-17.62 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:16:16 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.568d {+03h 14m 16s} (J2000)
POINT_DEC:       -87.488d {-87d 29' 16"} (J2000)
POINT_ROLL:      50.006d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40399.36 SOD {11:13:19.36} UT,   87.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.607
N_STARS:         63
X_OFFSET:        568 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00845443000msufc0087.fits
SUN_POSTN:        99.40d {+06h 37m 35s}  +23.16d {+23d 09' 18"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.50d {+20h 22m 00s}  -19.24d {-19d 14' 17"}
MOON_DIST:        71.30 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.25,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.52,-68.38 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:16:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.568d {+03h 14m 16s} (J2000)
POINT_DEC:       -87.488d {-87d 29' 16"} (J2000)
POINT_ROLL:      50.006d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40399.36 SOD {11:13:19.36} UT,   87.6 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.607
N_STARS:         63
X_OFFSET:        568 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00845443000msufc0087.fits
SUN_POSTN:        99.40d {+06h 37m 35s}  +23.16d {+23d 09' 18"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.50d {+20h 22m 00s}  -19.24d {-19d 14' 16"}
MOON_DIST:        71.30 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.25,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.52,-68.38 [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:     Sat 30 Jun 18 11:17:32 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.568d {+03h 14m 16s} (J2000)
POINT_DEC:       -87.488d {-87d 29' 16"} (J2000)
ROLL:            50.006d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40399.36 SOD {11:13:19.36} UT,   87.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552050020
X_OFFSET:        934 [pixels]
Y_OFFSET:        814 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1094
Y_GRB_POS:       974
BINNING_INDEX:   1
IM_URL:          sw00845443000msuni0109.fits
SUN_POSTN:        99.40d {+06h 37m 35s}  +23.16d {+23d 09' 18"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.51d {+20h 22m 02s}  -19.24d {-19d 14' 11"}
MOON_DIST:        71.30 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.25,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.52,-68.38 [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:     Sat 30 Jun 18 11:17:40 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.568d {+03h 14m 16s} (J2000)
POINT_DEC:       -87.488d {-87d 29' 16"} (J2000)
ROLL:            50.006d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40399.36 SOD {11:13:19.36} UT,   87.6 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552050020
X_OFFSET:        934 [pixels]
Y_OFFSET:        814 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1094
Y_GRB_POS:       974
BINNING_INDEX:   1
IM_URL:          sw00845443000msuni0109.fits
SUN_POSTN:        99.40d {+06h 37m 35s}  +23.16d {+23d 09' 18"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.51d {+20h 22m 03s}  -19.24d {-19d 14' 11"}
MOON_DIST:        71.30 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.25,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.52,-68.38 [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:     Sat 30 Jun 18 11:19:39 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     845443,   Seg_Num: 0
GRB_RA:           48.9834d {+03h 15m 56.01s} (J2000),
                  47.5003d {+03h 10m 00.07s} (current),
                  53.4362d {+03h 33m 44.68s} (1950)
GRB_DEC:         -87.4784d {-87d 28' 42.2"} (J2000),
                 -87.4098d {-87d 24' 35.2"} (current),
                 -87.6534d {-87d 39' 12.3"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         17.44 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40396.00 SOD {11:13:16.00} UT,   84.2 [sec] since BAT Trigger Time
SUN_POSTN:        99.40d {+06h 37m 36s}  +23.15d {+23d 09' 18"}
SUN_DIST:        111.54 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.53d {+20h 22m 07s}  -19.23d {-19d 14' 03"}
MOON_DIST:        71.32 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.23,-29.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      274.50,-68.40 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 5.4 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #22872
P. D'Avanzo (INAF-OAB), C. Gronwall (PSU), J.D. Gropp (PSU), J. A. Kennea (PSU), H. A. Krimm (NSF/USRA), F. E. Marshall (NASA/GSFC) and T. Sakamoto (AGU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 11:11:51 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 180630A (trigger=845443). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 48.810, -87.482 which is
```
   RA(J2000) = 03h 15m 14s
   Dec(J2000) = -87d 28' 54"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 10 sec. The peak count rate was ~6500 counts/sec (15-350 keV), at ~4 sec after the trigger.
The XRT began observing the field at 11:13:13.4 UT, 81.6 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 48.95887, -87.47850 which is equivalent to:
```
   RA(J2000)  = 03h 15m 50.13s
   Dec(J2000) = -87d 28' 42.6"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 26 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. 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 1.34 x 10^21 cm^-2 (Willingale et al. 2013).
The initial flux in the 2.5 s image was 6.12e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 87 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
 
  RA(J2000)  =	03:15:56.02 =  48.98342
  DEC(J2000) = -87:28:42.4  = -87.47844
```
with a 90%-confidence error radius of about 0.62 arc sec. This position is 5.7 arc sec. from the center of the XRT error circle. The estimated magnitude is 17.44 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.13.
Burst Advocate for this burst is P. D'Avanzo (paolo.davanzo 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/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:24:39 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.490d {-87d 29' 25"} (J2000)
POINT_ROLL:      50.017d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40611.42 SOD {11:16:51.42} UT,   299.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.458
N_STARS:         57
X_OFFSET:        614 [pixels]
Y_OFFSET:        494 [pixels]
X_MAX:           1573 [pixels]
Y_MAX:           1453 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00845443000msufc0299.fits
SUN_POSTN:        99.40d {+06h 37m 36s}  +23.15d {+23d 09' 17"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.57d {+20h 22m 17s}  -19.23d {-19d 13' 42"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:24:50 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.490d {-87d 29' 25"} (J2000)
POINT_ROLL:      50.017d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40611.42 SOD {11:16:51.42} UT,   299.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.458
N_STARS:         57
X_OFFSET:        614 [pixels]
Y_OFFSET:        494 [pixels]
X_MAX:           1573 [pixels]
Y_MAX:           1453 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00845443000msufc0299.fits
SUN_POSTN:        99.40d {+06h 37m 36s}  +23.15d {+23d 09' 17"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.57d {+20h 22m 18s}  -19.23d {-19d 13' 41"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [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:     Sat 30 Jun 18 11:25:46 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.490d {-87d 29' 25"} (J2000)
ROLL:            50.017d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40611.42 SOD {11:16:51.42} UT,   299.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     552050232
X_OFFSET:        934 [pixels]
Y_OFFSET:        814 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1094
Y_GRB_POS:       974
BINNING_INDEX:   1
IM_URL:          sw00845443000msuni0321.fits
SUN_POSTN:        99.40d {+06h 37m 37s}  +23.15d {+23d 09' 17"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.58d {+20h 22m 19s}  -19.23d {-19d 13' 37"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [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:     Sat 30 Jun 18 11:25:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.490d {-87d 29' 25"} (J2000)
ROLL:            50.017d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40611.42 SOD {11:16:51.42} UT,   299.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     552050232
X_OFFSET:        934 [pixels]
Y_OFFSET:        814 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1094
Y_GRB_POS:       974
BINNING_INDEX:   1
IM_URL:          sw00845443000msuni0321.fits
SUN_POSTN:        99.40d {+06h 37m 37s}  +23.15d {+23d 09' 17"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.58d {+20h 22m 20s}  -19.23d {-19d 13' 36"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [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:     Sat 30 Jun 18 11:25:09 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     845443,   Seg_Num: 0
GRB_RA:           48.9772d {+03h 15m 54.52s} (J2000),
                  47.4944d {+03h 09m 58.66s} (current),
                  53.4291d {+03h 33m 42.98s} (1950)
GRB_DEC:         -87.4782d {-87d 28' 41.5"} (J2000),
                 -87.4096d {-87d 24' 34.5"} (current),
                 -87.6532d {-87d 39' 11.6"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  40486.00 SOD {11:14:46.00} UT,   174.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        99.40d {+06h 37m 37s}  +23.15d {+23d 09' 17"}
SUN_DIST:        111.54 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.58d {+20h 22m 18s}  -19.23d {-19d 13' 39"}
MOON_DIST:        71.33 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.23,-29.16 [deg] galactic lon,lat of the burst
ECL_COORDS:      274.50,-68.40 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:31:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.491d {-87d 29' 25"} (J2000)
POINT_ROLL:      50.018d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  41188.94 SOD {11:26:28.94} UT,   877.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.654
N_STARS:         153
X_OFFSET:        374 [pixels]
Y_OFFSET:        254 [pixels]
X_MAX:           1813 [pixels]
Y_MAX:           1693 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00845443000msufc0877.fits
SUN_POSTN:        99.41d {+06h 37m 38s}  +23.15d {+23d 09' 16"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.63d {+20h 22m 32s}  -19.22d {-19d 13' 12"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 30 Jun 18 11:31:57 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.491d {-87d 29' 25"} (J2000)
POINT_ROLL:      50.018d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  41188.94 SOD {11:26:28.94} UT,   877.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.654
N_STARS:         153
X_OFFSET:        374 [pixels]
Y_OFFSET:        254 [pixels]
X_MAX:           1813 [pixels]
Y_MAX:           1693 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00845443000msufc0877.fits
SUN_POSTN:        99.41d {+06h 37m 38s}  +23.15d {+23d 09' 16"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.63d {+20h 22m 32s}  -19.22d {-19d 13' 11"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [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:     Sat 30 Jun 18 11:32:59 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.491d {-87d 29' 25"} (J2000)
ROLL:            50.018d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  41188.94 SOD {11:26:28.94} UT,   877.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552050810
X_OFFSET:        933 [pixels]
Y_OFFSET:        813 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1093
Y_GRB_POS:       973
BINNING_INDEX:   1
IM_URL:          sw00845443000msuni0899.fits
SUN_POSTN:        99.41d {+06h 37m 38s}  +23.15d {+23d 09' 16"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.64d {+20h 22m 34s}  -19.22d {-19d 13' 06"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [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:     Sat 30 Jun 18 11:33:17 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     845443,   Seg_Num: 0
POINT_RA:         48.557d {+03h 14m 14s} (J2000)
POINT_DEC:       -87.491d {-87d 29' 25"} (J2000)
ROLL:            50.018d
IMG_START_DATE:  18299 TJD;   181 DOY;   18/06/30
IMG_START_TIME:  41188.94 SOD {11:26:28.94} UT,   877.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     552050810
X_OFFSET:        933 [pixels]
Y_OFFSET:        813 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1093
Y_GRB_POS:       973
BINNING_INDEX:   1
IM_URL:          sw00845443000msuni0899.fits
SUN_POSTN:        99.41d {+06h 37m 38s}  +23.15d {+23d 09' 16"}
SUN_DIST:        111.56 [deg]   Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN:      305.65d {+20h 22m 35s}  -19.22d {-19d 13' 05"}
MOON_DIST:        71.31 [deg]
MOON_ILLUM:      95 [%]
GAL_COORDS:      301.26,-29.16 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.51,-68.38 [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 #22873
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1171 s of XRT Photon Counting mode data and 1 UVOT images for GRB 180630A, 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 = 48.98081, -87.47880 which is equivalent to:
```
RA (J2000): 03h 15m 55.39s
Dec (J2000): -87d 28' 43.7"
```
with an uncertainty of 1.7 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 #22875
R. Hamburg (UAH), A. von Kienlin (MPE), and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 11:11:54.41 UT on 30 June 2018, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 180630A (trigger 552049919 / 180630467) which was also detected by the Swift BAT and XRT instruments (D'Avanzo et al. 2018, GCN 22872). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 20 degrees.
The GBM light curve consists of a single structured peak with a duration (T90) of about 12 s (50-300 keV). The time-averaged spectrum from T0-1.54s to T0+8.70 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.37 +/- 0.09 and the cutoff energy, parameterized as Epeak, is 84 +/- 8 keV. A Band function fits the spectrum equally well with Epeak = 60 +/- 10 keV, alpha = -1.11 +/- 0.20, and beta = -2.32 +/- 0.16.
The event fluence (10-1000 keV) in this time interval is (2.5 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1.15 s in the 10-1000 keV band is 9.4 +/- 0.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #22876
P.A. Evans (U. Leicester), S.L. Gibson (U. Leicester), Z. Liu (NAOC / U. Leicester), A. Melandri (INAF-OAB), V. D'Elia (ASDC), A. Tohuvavohu (PSU), S. J. LaPorte (PSU), J.A. Kennea (PSU) and P. D'Avanzo report on behalf of the Swift-XRT team:
We have analysed 6.3 ks of XRT data for GRB 180630A (D'Avanzo et al. GCN Circ. 22872), from 87 s to 29.0 ks after the BAT trigger. The data comprise 69 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. 22873).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=3.04 (+0.61, -0.21). At T+155 s the decay flattens to an alpha of 0.25 (+0.26, -0.09). The light curve breaks again at T+659 s to a decay with alpha=0.80 (+0.07, -0.05), before a final break at T+24.3 ks s after which the decay index is 4.4 (+3.6, -2.2).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.91 (+0.21, -0.17). The best-fitting absorption column is consistent with the Galactic value of 1.3 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.64 (+/-0.12) and a best-fitting absorption column of 1.7 (+0.5, -0.3) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.3 x 10^-11 (5.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.7 (+0.5, -0.3) x 10^21 cm^-2
Galactic foreground: 1.3 x 10^21 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.64 (+/-0.12)
```
If the light curve continues to decay with a power-law decay index of 4.4, the count rate at T+24 hours will be 4.3 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.8 x 10^-14 (2.2 x 10^-14) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00845443.
This circular is an official product of the Swift-XRT team.
GCN Circular #22877
A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), 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 180630A (trigger #845443) (D'Avanzo, et al., GCN Circ. 22872). The BAT ground-calculated position is RA, Dec = 48.885, -87.476 deg which is
```
    RA(J2000)  =  03h 15m 32.5s
    Dec(J2000) = -87d 28' 33.4"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 59%.
The mask-weighted light curve shows a double-peaked structure. The first pulse starts at T0, peaks at T+4 sec and ends at T+15 sec. The second weak pulse starts at T+15 sec and ends at T+30 sec. T90 (15-350 keV) is 18.85 +- 6.45 sec (estimated error including systematics).
The time-averaged spectrum from T-0.36 to T+30.02 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.07 +- 0.10. The fluence in the 15-150 keV band is 1.8 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+3.65 sec in the 15-150 keV band is 6.6 +- 0.4 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/845443/BA/
GCN Circular #22881
GRB 180630A: Swift/UVOT Detection
S. J. LaPorte (PSU) and P. D'Avanzo (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 180630A 88 s after the BAT trigger (D'Avanzo et al., GCN Circ. 22872). A fading source consistent with the XRT position (Beardmore et al. GCN Circ. 22873) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
    RA  (J2000) =  03:15:55.74 =  48.98224 (deg.)
    Dec (J2000) = -87:28:42.3  = -87.47842 (deg.)
```
with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence).
Preliminary detections 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               88          237          148         17.49 +/- 0.04
white             6384         6584          196         19.50 +/- 0.11
v                  629         1597          117         18.56 +/- 0.20
b                  555          748           39         18.76 +/- 0.19
u                  300          549          246         17.76 +/- 0.06
w1                 678         7392          510         19.42 +/- 0.17
m2                 654         7187          452         20.16 +/- 0.33
w2                 605         6777          255        >19.9
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.13 in the direction of the burst (Schlegel et al. 1998).

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Jochen Greiner, last update: 02-Jul-2018 [Disclaimer]