Gamma-ray Burst 190219A

(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:     Tue 19 Feb 19 19:39:37 UT 
NOTICE_TYPE:     Swift-BAT GRB Position 
TRIGGER_NUM:     889748,   Seg_Num: 0 
GRB_RA:          189.757d {+12h 39m 02s} (J2000), 
                 189.926d {+12h 39m 42s} (current), 
                 189.312d {+12h 37m 15s} (1950) 
GRB_DEC:         +76.614d {+76d 36' 50"} (J2000), 
                 +76.509d {+76d 30' 32"} (current), 
                 +76.888d {+76d 53' 18"} (1950) 
GRB_ERROR:       3.00 [arcmin radius, statistical only] 
GRB_INTEN:       8391 [cnts]    Image_Peak=351 [image_cnts] 
TRIGGER_DUR:     4.096 [sec]  
TRIGGER_INDEX:   298     E_range: 25-100 keV 
BKG_INTEN:       70664 [cnts] 
BKG_TIME:        70681.55 SOD {19:38:01.55} UT 
BKG_DUR:         40 [sec] 
GRB_DATE:        18533 TJD;    50 DOY;   19/02/19 
GRB_TIME:        70738.00 SOD {19:38:58.00} UT 
GRB_PHI:         -142.88 [deg] 
GRB_THETA:        26.92 [deg] 
SOLN_STATUS:     0x3 
RATE_SIGNIF:     8.54 [sigma] 
IMAGE_SIGNIF:    10.13 [sigma] 
MERIT_PARAMS:     +1  +0  +0  +2  +2  +0  +0  +0 +37  +0  
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 52"} 
SUN_DIST:        111.78 [deg]   Sun_angle= 9.5 [hr] (West of Sun) 
MOON_POSTN:      156.37d {+10h 25m 28s}  +13.20d {+13d 12' 03"} 
MOON_DIST:        65.71 [deg]
MOON_ILLUM:      100 [%] 
GAL_COORDS:      123.88, 40.49 [deg] galactic lon,lat of the burst (or transient) 
ECL_COORDS:      123.03, 65.25 [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 = 109.44,8.82 [deg].

red DSS finding chart ps-file

GCN NOTICE

 
TITLE:           GCN/SWIFT NOTICE 
NOTICE_DATE:     Tue 19 Feb 19 19:41:01 UT 
NOTICE_TYPE:     Swift-XRT Position 
TRIGGER_NUM:     889748,   Seg_Num: 0 
GRB_RA:          189.6187d {+12h 38m 28.48s} (J2000), 
                 189.7888d {+12h 39m 09.30s} (current), 
                 189.1712d {+12h 36m 41.07s} (1950) 
GRB_DEC:         +76.6097d {+76d 36' 34.9"} (J2000), 
                 +76.5047d {+76d 30' 16.8"} (current), 
                 +76.8844d {+76d 53' 03.7"} (1950) 
GRB_ERROR:       6.3 [arcsec radius, statistical plus systematic, 90% containment] 
GRB_INTEN:       1.38e-08 [erg/cm2/sec] 
GRB_SIGNIF:      5.38 [sigma] 
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19 
IMG_START_TIME:  70838.91 SOD {19:40:38.91} UT,   100.9 [sec] since BAT Trigger Time 
TAM[0-3]:        327.63 237.22 261.66 243.59 
AMPLIFIER:       2 
WAVEFORM:        134 
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 51"} 
SUN_DIST:        111.80 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.38d {+10h 25m 31s}  +13.20d {+13d 11' 47"} 
MOON_DIST:        65.69 [deg] 
MOON_ILLUM:      100 [%] 
GAL_COORDS:      123.92, 40.49 [deg] galactic lon,lat of the burst 
ECL_COORDS:      123.01, 65.22 [deg] ecliptic lon,lat of the burst 
COMMENTS:        SWIFT-XRT Coordinates.   
COMMENTS:        The XRT position is 1.94 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:41:11 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     889748,   Seg_Num: 0
GRB_RA:          189.6187d {+12h 38m 28.4s} (J2000),
                 189.7888d {+12h 39m 09.3s} (current),
                 189.1712d {+12h 36m 41.0s} (1950)
GRB_DEC:         +76.6097d {+76d 36' 34.9"} (J2000),
                 +76.5047d {+76d 30' 16.8"} (current),
                 +76.8844d {+76d 53' 03.7"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       29 [cnts]
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  70838.91 SOD {19:40:38.91} UT,   100.9 [sec] since BAT Trigger Time
CENTROID_X:      323.49,  raw= 323  [pixels]
CENTROID_Y:      323.88,  raw= 324  [pixels]
ROLL:            39.20 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   60.06
GRB_POS_XRT_Z:   40.29
IMAGE_URL:       sw00889748000msxps_rw.img
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 51"}
SUN_DIST:        111.80 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.38d {+10h 25m 32s}  +13.20d {+13d 11' 45"}
MOON_DIST:        65.69 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.92, 40.49 [deg] galactic lon,lat of the burst
ECL_COORDS:      123.01, 65.22 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:41:13 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     889748,   Seg_Num: 0
GRB_RA:          189.6187d {+12h 38m 28.4s} (J2000),
                 189.7888d {+12h 39m 09.3s} (current),
                 189.1712d {+12h 36m 41.0s} (1950)
GRB_DEC:         +76.6097d {+76d 36' 34.9"} (J2000),
                 +76.5047d {+76d 30' 16.8"} (current),
                 +76.8844d {+76d 53' 03.7"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       29 [cnts]
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  70838.91 SOD {19:40:38.91} UT,   100.9 [sec] since BAT Trigger Time
CENTROID_X:      323.49,  raw= 323  [pixels]
CENTROID_Y:      323.88,  raw= 324  [pixels]
ROLL:            39.20 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   60.06
GRB_POS_XRT_Z:   40.29
IMAGE_URL:       sw00889748000msxps_rw.img
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 51"}
SUN_DIST:        111.80 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.38d {+10h 25m 32s}  +13.20d {+13d 11' 44"}
MOON_DIST:        65.69 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.92, 40.49 [deg] galactic lon,lat of the burst
ECL_COORDS:      123.01, 65.22 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:43:17 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     889748,   Seg_Num: 0
GRB_RA:          189.757d {+12h 39m 02s} (J2000),
                 189.926d {+12h 39m 42s} (current),
                 189.312d {+12h 37m 15s} (1950)
GRB_DEC:         +76.614d {+76d 36' 50"} (J2000),
                 +76.509d {+76d 30' 32"} (current),
                 +76.888d {+76d 53' 18"} (1950)
GRB_DATE:        18533 TJD;    50 DOY;   19/02/19
GRB_TIME:        70738.00 SOD {19:38:58.00} UT
TRIGGER_INDEX:   298
GRB_PHI:         -142.88 [deg]
GRB_THETA:        26.92 [deg]
DELTA_TIME:      -43.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     8.54 [sigma]
IMAGE_SIGNIF:    10.13 [sigma]
LC_URL:          sw00889748000msb.lc
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 49"}
SUN_DIST:        111.78 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.40d {+10h 25m 37s}  +13.19d {+13d 11' 21"}
MOON_DIST:        65.72 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.88, 40.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      123.03, 65.25 [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 = 109.44,8.82 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:43:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.707d {+12h 38m 50s} (J2000)
POINT_DEC:       +76.610d {+76d 36' 35"} (J2000)
POINT_ROLL:      39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  70847.54 SOD {19:40:47.54} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.408
N_STARS:         31
X_OFFSET:        568 [pixels]
Y_OFFSET:        544 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1503 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00889748000msufc0109.fits
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 48"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.41d {+10h 25m 38s}  +13.19d {+13d 11' 17"}
MOON_DIST:        65.71 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.49 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:43:54 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.707d {+12h 38m 50s} (J2000)
POINT_DEC:       +76.610d {+76d 36' 35"} (J2000)
POINT_ROLL:      39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  70847.54 SOD {19:40:47.54} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.408
N_STARS:         31
X_OFFSET:        568 [pixels]
Y_OFFSET:        544 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1503 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00889748000msufc0109.fits
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.16d {-11d 09' 48"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.41d {+10h 25m 38s}  +13.19d {+13d 11' 14"}
MOON_DIST:        65.71 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.49 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [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:     Tue 19 Feb 19 19:45:01 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.707d {+12h 38m 50s} (J2000)
POINT_DEC:       +76.610d {+76d 36' 35"} (J2000)
ROLL:            39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  70847.54 SOD {19:40:47.54} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     572298069
X_OFFSET:        668 [pixels]
Y_OFFSET:        808 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       968
BINNING_INDEX:   1
IM_URL:          sw00889748000msuni0132.fits
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 47"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.42d {+10h 25m 41s}  +13.18d {+13d 11' 01"}
MOON_DIST:        65.71 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.49 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [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:     Tue 19 Feb 19 19:45:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.707d {+12h 38m 50s} (J2000)
POINT_DEC:       +76.610d {+76d 36' 35"} (J2000)
ROLL:            39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  70847.54 SOD {19:40:47.54} UT,   109.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     572298069
X_OFFSET:        668 [pixels]
Y_OFFSET:        808 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       968
BINNING_INDEX:   1
IM_URL:          sw00889748000msuni0132.fits
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 47"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.42d {+10h 25m 42s}  +13.18d {+13d 10' 59"}
MOON_DIST:        65.71 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.49 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [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:     Tue 19 Feb 19 19:51:35 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.706d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
POINT_ROLL:      39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71005.58 SOD {19:43:25.58} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.428
N_STARS:         19
X_OFFSET:        348 [pixels]
Y_OFFSET:        488 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1447 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00889748000msufc0267.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 41"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.49d {+10h 25m 58s}  +13.16d {+13d 09' 46"}
MOON_DIST:        65.72 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:51:52 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.706d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
POINT_ROLL:      39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71005.58 SOD {19:43:25.58} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.428
N_STARS:         19
X_OFFSET:        348 [pixels]
Y_OFFSET:        488 [pixels]
X_MAX:           1307 [pixels]
Y_MAX:           1447 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00889748000msufc0267.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 41"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.49d {+10h 25m 58s}  +13.16d {+13d 09' 43"}
MOON_DIST:        65.72 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [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:     Tue 19 Feb 19 19:52:42 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.706d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
ROLL:            39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71005.58 SOD {19:43:25.58} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     572298228
X_OFFSET:        668 [pixels]
Y_OFFSET:        808 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       968
BINNING_INDEX:   1
IM_URL:          sw00889748000msuni0290.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 40"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.50d {+10h 26m 00s}  +13.16d {+13d 09' 34"}
MOON_DIST:        65.72 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [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:     Tue 19 Feb 19 19:52:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.706d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
ROLL:            39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71005.58 SOD {19:43:25.58} UT,   267.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     572298228
X_OFFSET:        668 [pixels]
Y_OFFSET:        808 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       828
Y_GRB_POS:       968
BINNING_INDEX:   1
IM_URL:          sw00889748000msuni0290.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 40"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.50d {+10h 26m 01s}  +13.16d {+13d 09' 31"}
MOON_DIST:        65.72 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [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 Circular #23902
A. P. Beardmore (U Leicester), J. A. Kennea (PSU), N. J. Klingler (PSU), A. Y. Lien (GSFC/UMBC), F. E. Marshall (NASA/GSFC), M. J. Moss (George Washington University), K. L. Page (U Leicester), D. M. Palmer (LANL) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 19:38:58 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 190219A (trigger=889748). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 189.757, +76.614 which is
```
   RA(J2000) = 12h 39m 02s
   Dec(J2000) = +76d 36' 50"
```
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 100 sec. The peak count rate was ~1300 counts/sec (15-350 keV), at ~70 sec after the trigger.
The XRT began observing the field at 19:40:38.9 UT, 100.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 189.62442, 76.61186 which is equivalent to:
```
   RA(J2000)  = 12h 38m 29.86s
   Dec(J2000) = +76d 36' 42.7"
```
with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 110 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 0.1 s image was 1.38e-08 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 109 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 0.03.
Burst Advocate for this burst is A. P. Beardmore (apb AT star.le.ac.uk). 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:     Tue 19 Feb 19 19:58:53 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.705d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
POINT_ROLL:      39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71608.80 SOD {19:53:28.80} UT,   870.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.093
N_STARS:         190
X_OFFSET:        108 [pixels]
Y_OFFSET:        248 [pixels]
X_MAX:           1547 [pixels]
Y_MAX:           1687 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00889748000msufc0870.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 35"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.57d {+10h 26m 16s}  +13.14d {+13d 08' 23"}
MOON_DIST:        65.73 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:59:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.705d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
POINT_ROLL:      39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71608.80 SOD {19:53:28.80} UT,   870.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.093
N_STARS:         190
X_OFFSET:        108 [pixels]
Y_OFFSET:        248 [pixels]
X_MAX:           1547 [pixels]
Y_MAX:           1687 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00889748000msufc0870.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 35"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.57d {+10h 26m 16s}  +13.14d {+13d 08' 19"}
MOON_DIST:        65.73 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [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:     Tue 19 Feb 19 20:00:33 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.705d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
ROLL:            39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71608.80 SOD {19:53:28.80} UT,   870.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     572298831
X_OFFSET:        667 [pixels]
Y_OFFSET:        807 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       827
Y_GRB_POS:       967
BINNING_INDEX:   1
IM_URL:          sw00889748000msuni0893.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 33"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.58d {+10h 26m 20s}  +13.13d {+13d 08' 04"}
MOON_DIST:        65.74 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 20:00:42 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     889748,   Seg_Num: 0
POINT_RA:        189.705d {+12h 38m 49s} (J2000)
POINT_DEC:       +76.608d {+76d 36' 28"} (J2000)
ROLL:            39.201d
IMG_START_DATE:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71608.80 SOD {19:53:28.80} UT,   870.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     572298831
X_OFFSET:        667 [pixels]
Y_OFFSET:        807 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       827
Y_GRB_POS:       967
BINNING_INDEX:   1
IM_URL:          sw00889748000msuni0893.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 33"}
SUN_DIST:        111.79 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.58d {+10h 26m 20s}  +13.13d {+13d 08' 02"}
MOON_DIST:        65.74 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.89, 40.50 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      123.03, 65.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Tue 19 Feb 19 19:59:43 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     889748,   Seg_Num: 0
GRB_RA:          189.6260d {+12h 38m 30.24s} (J2000),
                 189.7960d {+12h 39m 11.03s} (current),
                 189.1787d {+12h 36m 42.87s} (1950)
GRB_DEC:         +76.6127d {+76d 36' 45.7"} (J2000),
                 +76.5077d {+76d 30' 27.6"} (current),
                 +76.8874d {+76d 53' 14.5"} (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:  18533 TJD;    50 DOY;   19/02/19
IMG_START_TIME:  71012.00 SOD {19:43:32.00} UT,   274.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 34"}
SUN_DIST:        111.80 [deg]   Sun_angle= 9.5 [hr] (West of Sun)
MOON_POSTN:      156.57d {+10h 26m 18s}  +13.14d {+13d 08' 14"}
MOON_DIST:        65.73 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      123.92, 40.49 [deg] galactic lon,lat of the burst
ECL_COORDS:      123.00, 65.22 [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 0.58% < P(seren) < 1.1%.

GCN Circular #23903
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 190219A, we find an enhanced XRT position of the afterglow: RA, Dec: 189.6264, 76.6128 which is equivalent to:
```
   RA (J2000)  = 12 38 30.33
   Dec (J2000) = +76 36 46.2
```
with an uncertainty of 2.1 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/889748.
Position enhancement is is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular is an official product of the Swift-XRT team.
GCN Circular #23904
C. Perez del Pulgar (Univ. de Malaga), Y.-D. Hu, X.-Y.Li, E. Fernandez-Garcia, A. Ayala, A. J. Castro-Tirado (IAA-CSIC), �A. Castellon, I. Carrasco (Univ. de Malaga) on behalf of a larger collaboration, report:
"Following the detection of GRB 190219A by Swift/BAT (Beardmore et al. GCNC 23902), the 0.3m BOOTES-1B robotic telescope in Mazagon (Huelva), southern Spain, responded automatically starting at 19:40:59 UT (121s after trigger; 82s after the alert). No optical afterglow is found down to 19 mag (unfiltered) on the co-added (50x10s) frames within the Swift/XRT error box (Evans et al. GCNC 23903), consistent with the non-detection by Swift/UVOT (Beardmore et al. GCNC 23902). Observations are ongoing".
GCN Circular #23905
V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, D.Vlasenko, V.Vladimirov, D.Zimnukhov, A.Kuznetsov, P.Balanutsa, A. Chasovnikov, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department),
O. Gress, N.M. Budnev, O.Ershova, Yu.Ishmuhametova (Applied Physics Institute, Irkutsk State University),
V. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk Educational State University),
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
R. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA),
H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE)
MASTER-Amur robotic telescope (Global MASTER-Net:http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the GRB190219A (Beardmore et al. GCN 23902 Ttrig=19:38:58 UT) 16 sec after notice time (55 sec after trigger time) at 2019-02-19 19:39:53 UT.
On our first (10s exposure) set we don`t find optical transient within SWIFT error-box (Evans et al. GCN 23903 12 38 30.33 +76 36 46.2 +-2.1arcsec). The 5-sigma upper limit has been about 16.2mag at 10-s first exposition, 16.7m on the 30-sec.exp., started at 2019-02-19 19:41:28UT.
The galactic latitude b = 41 deg., longitude l = 124 deg. The observations started on zenit distance = 28 deg. The moon (100 % bright part) altitude was 32 deg.The distance between moon and object is 66deg. The sun altitude was -28.1 deg.
MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the GRB190219.82 21 sec after notice time (60 sec after trigger time) at 2019-02-19 19:39:58 UT. On our first (10s exposure) there is no new OT inside Swift XRT error box brighter than 16.5.
The observations started on zenit distance = 41 deg. The sun altitude was -50.7 deg.
MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the GRB190219.82 18 sec after notice time (57 sec after trigger time) at 2019-02-19 19:39:55 UT. On our first (10s exposure) there is no optical transient within SWIFT error-box . with the 5-sigma upper limit about 17.44mag
The observations started on zenit distance = 42 deg. The sun altitude was -45.5 deg.
MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) was pointed to the GRB190219.82 20 sec after notice time (59 sec after trigger time) at 2019-02-19 19:39:57 UT. On our first (10s exposure) set there is no optical transient within SWIFT error-box with the 5-sigma upper limit about 15.5
The observation started when error box altitude was 21deg. Observations started at twilight. The sun altitude was -9.9 deg.
MASTER-Tunka robotic telescope ocated in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the GRB190219.82 29 sec after notice time (71 sec after trigger time) at 2019-02-19 19:40:09 UT.
On our first (10s exposure) there is no optical transient within SWIFT error-box with the 5-sigma upper limit 15mag The observations made on zenit distance = 25 deg. The sun altitude is -40.6 deg.
GCN Circular #23906
D. A. Kann (HETH/IAA-CSIC), A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), M. Blazek, L. Izzo (both HETH/IAA-CSIC), A. Guijarro Roman, A. Fernandez Martin (both CAHA), C. C. Thoene, K. Bensch (both HETH/IAA-CSIC), report:
We observed the enhanced XRT position (Evans et al., GCN #23903) of Swift GRB 190219A (Beardmore et al., GCN #23902) with the 2.2m telescope of CAHA equipped with CAFOS. We obtained 3 x 180 s images in the Ic band under inclement weather conditions and the influence of the full Moon.
At the XRT position, we do not detect any source down to Ic > 21.5 mag (AB mag) at 0.038627 days after the GRB trigger, calibrated against nearby PanSTARRS objects. No source is visible at this position in PanSTARRS imaging either. This non-detection is in agreement with Beardmore et al. (GCN #23902) and Perez del Pulgar et al. (GCN #23904).
GCN Circular #23907
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1531 s of XRT Photon Counting mode data and 1 UVOT images for GRB 190219A, 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 = 189.62654, +76.61261 which is equivalent to:
```
RA (J2000): 12h 38m 30.37s
Dec (J2000): +76d 36' 45.4"
```
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 #23909
J.P. Osborne (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Tohuvavohu (PSU), S. J. LaPorte (PSU), J.A. Kennea (PSU), K.L. Page (U. Leicester) and A.P. Beardmore report on behalf of the Swift-XRT team:
We have analysed 6.2 ks of XRT data for GRB 190219A (Beardmore et al. GCN Circ. 23902), from 104 s to 13.3 ks after the BAT trigger. The data comprise 168 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. 23903).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=1.7 (+0.6, -0.9). At T+130 s the decay steepens to an alpha of 5.27 (+0.11, -0.12) before breaking again at T+554 s to a final decay with index alpha=0.13 (+0.08, -0.09).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.63 (+0.07, -0.06). The best-fitting absorption column is 1.92 (+0.17, -0.16) x 10^21 cm^-2, in excess of the Galactic value of 3.5 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.14 (+0.21, -0.19) and a best-fitting absorption column of 1.6 (+0.6, -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 (4.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.6 (+0.6, -0.5) x 10^21 cm^-2
Galactic foreground: 3.5 x 10^20 cm^-2
Excess significance: 3.8 sigma
Photon index:	     2.14 (+0.21, -0.19)
```
If the light curve continues to decay with a power-law decay index of 0.13, the count rate at T+24 hours will be 0.064 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.0 x 10^-12 (2.8 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/00889748.
This circular is an official product of the Swift-XRT team.
GCN Circular #23910
Z.P. Zhu, D. Xu, B.Y. Yu (NAOC), J.H. Liu (XAO) report:
We observed the field of GRB 190219A (Beardmore et al., GCN 23902) using the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained 10x90s frames in the R filter, started at 19:57:52 UT on 2019-02-19, i.e., 18.43 min after the burst.
No optical source is detected at the XRT position (Beardmore et al., GCN 23902 & 23907) in our stacked image, down to a 3 sigma limiting magnitude of R~17.5.
GCN Circular #23911
D. Xu (NAOC), K.E. Heintz (Univ. of Iceland), D.B. Malesani (DAWN/NBI/DTU and DARK/NBI), Z.P. Zhu (NAOC), P. Galindo (NOT), J. Viuho (NOT), report on behalf of a larger collaboration:
We observed the field of GRB 190219A (Beardmore et al., GCN 23902) using the 2.56-m Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. Observations started at 01:13:50 UT on 2019-02-20, i.e., 5.58 hr after the burst, and we obtained 6x300 s Sloan r-band and 10x200 s z-band frames. The weather conditions of the night were bad, with thick clouds (which accounts for the large delay of our observations).
Among our data, the z-band images are deeper, and a source is detected in the stacked observations, at coordinates (J2000):
```
R.A. (J2000) = 12:38:30.32
Dec. (J2000) = +76:36:46.62
```
with a radius uncertainty of ~ 0.2 arcsec, within the enhanced Swift-XRT error circle (Beardmore et al., GCN 23907). We measure m(z) = 22.8 �� 0.4 AB at 6.32 hr post-burst, calibrated against nearby Pan-STARRS stars. The source is not detected in the stacked r-band image, down to a limiting magnitude of m(r) > 22.5 AB. We note that the detected magnitude is fainter than the Pan-STARRS survey limit, and as we lack temporal information we cannot comment on variability. We propose this object as a candidate counterpart for GRB 191202A, but further observations are required to establish variability.
GCN Circular #23913
T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), 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-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 190219A (trigger #889748) (Beardmore et al., GCN Circ. 23902). The BAT ground-calculated position is RA, Dec = 189.686, 76.606 deg which is
```
  RA(J2000)  =  12h 38m 44.7s
  Dec(J2000) = +76d 36' 21.6"
```
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 76%.
The mask-weighted light curve shows a multi-peaked structure that starts at ~ T-110 s and ends at ~T+100 s. The first major pulse starts at ~T-5 s, peaks at ~T+5 s, and end at ~T+40 s. It is followed by the second major pulse that peaks at ~T+65 s and ends at ~T+90 s. T90 (15-350 keV) is 167.8 +- 12.8 sec (estimated error including systematics).
The time-averaged spectrum from T-106.20 to T+88.68 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.24 +- 0.10. The fluence in the 15-150 keV band is 3.9 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+65.52 sec in the 15-150 keV band is 1.9 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/889748/BA/
GCN Circular #23920
A. Volnova (IKI), S. Nazarov (CrAO), S. Schmalz (KIAM), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI), S. Belkin (IKI), E. Mazaeva (IKI), I. Molotov (KIAM) report on behalf of IKI-GRB-FuN collaboration:
We observed the field of GRB 190219A (Beardmore et al., GCN 23902) with AZT-8 of CrAO, AS-32 (0.7m) telescope of Abastumani Observatory and ORI-22 telescope of ISON-Castelgrande Observatory, first observation starting on Feb. 19 (UT) 19:48:14. We do not detect any object within enhanced XRT error circle (Beardmore et al., GCN 23907). In particular we do not detect the afterglow candidate (Xu et al., GCN 23911). Preliminary photometry of the field is following.
```
date       UT start    t-T0    Filter   Exp. UL         Obs./Tel.
                      (mid, d)           (s) (3 sigma)
2019-02-19 20:14:14  0.02991   R   780      20.3        CrAO/AZT-8
2019-02-20 00:39:36  0.28998   R    95*60   20.8        AbAO/AS-32
```
The photometry is based on nearby USNO-B1.0 stars.

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Jochen Greiner, last update: 21-Feb-2019 [Disclaimer]