Gamma-ray Burst 180222A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 22 Feb 18 13:10:34 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     811235,   Seg_Num: 0
  GRB_RA:          256.571d {+17h 06m 17s} (J2000),
                   256.877d {+17h 07m 30s} (current),
                   255.728d {+17h 02m 55s} (1950)
  GRB_DEC:         -36.803d {-36d 48' 08"} (J2000),
                   -36.826d {-36d 49' 32"} (current),
                   -36.736d {-36d 44' 08"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       6172 [cnts]    Image_Peak=236 [image_cnts]
  TRIGGER_DUR:     2.048 [sec] 
  TRIGGER_INDEX:   486     E_range: 50-350 keV
  BKG_INTEN:       56951 [cnts]
  BKG_TIME:        47371.48 SOD {13:09:31.48} UT
  BKG_DUR:         24 [sec]
  GRB_DATE:        18171 TJD;    53 DOY;   18/02/22
  GRB_TIME:        47403.54 SOD {13:10:03.54} UT
  GRB_PHI:          39.99 [deg]
  GRB_THETA:        11.38 [deg]
  SOLN_STATUS:     0x30000003
  RATE_SIGNIF:     14.96 [sigma]
  IMAGE_SIGNIF:    7.78 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +1  +3  -2  +0  +1 -25  +0 
  SUN_POSTN:       335.76d {+22h 23m 03s}  -10.09d {-10d 05' 27"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.66d {+03h 30m 39s}  +13.65d {+13d 38' 52"}
  MOON_DIST:       148.30 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.43 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      258.96,-13.88 [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 = 258.39,18.71 [deg].  
  COMMENTS:           
  COMMENTS:        NOTE: This BAT event is spatially(0.00<0.1deg) and temporally(4.0<100sec) coincident with the INTEGRAL event (trignum=8015).  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Thu 22 Feb 18 14:35:49 UT
  NOTICE_TYPE:    INTEGRAL Offline
  TRIGGER_NUM:    8015,   Sub_Num: 4
  GRB_RA:         256.5417d {+17h 06m 10s} (J2000),
                  256.8477d {+17h 07m 23s} (current),
                  255.6992d {+17h 02m 48s} (1950)
  GRB_DEC:        -36.8015d {-36d 48' 04"} (J2000),
                  -36.8247d {-36d 49' 28"} (current),
                  -36.7347d {-36d 44' 04"} (1950)
  GRB_ERROR:      1.50 [arcmin, radius, statistical only]
  GRB_INTEN:      17.70 [sigma]
  GRB_TIME:       47414.56 SOD {13:10:14.56} UT
  GRB_DATE:       18171 TJD;    53 DOY;   18/02/22
  SC_RA:          260.13 [deg] (J2000)
  SC_DEC:         -40.62 [deg] (J2000)
  SUN_POSTN:      335.82d {+22h 23m 16s}  -10.07d {-10d 04' 09"}
  SUN_DIST:        75.19 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:      53.47d {+03h 33m 54s}  +13.86d {+13d 51' 25"}
  MOON_DIST:      148.98 [deg]
  GAL_COORDS:     348.85,  2.45 [deg] galactic lon,lat of the burst
  ECL_COORDS:     258.93,-13.88 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=20.0000 and Time_Error=20.0000.  
  COMMENTS:       refined_coordinates_after_offline_analysis  
  COMMENTS:          
  COMMENTS:       NOTE: This INTEGRAL event is spatially(0.00<0.1deg) and temporally(11.0<100sec) coincident with the SWIFT_BAT event (trignum=811235).  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 22 Feb 18 13:24:07 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.586d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.803d {-36d 48' 11"} (J2000)
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  47482.75 SOD {13:11:22.75} UT,   79.2 [sec] since BAT Trigger Time
  COUNTS:          16    Min_needed= 20
  STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
  PH2_ITER:        2    Max_iter_allowed= 4
  ERROR_CODE:      1
  COMMENTS:        SWIFT-XRT Nack Position.  
  COMMENTS:        No source found in the image.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 22 Feb 18 13:25:21 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     811235,   Seg_Num: 0
  GRB_RA:          256.571d {+17h 06m 17s} (J2000),
                   256.877d {+17h 07m 30s} (current),
                   255.728d {+17h 02m 55s} (1950)
  GRB_DEC:         -36.803d {-36d 48' 08"} (J2000),
                   -36.826d {-36d 49' 32"} (current),
                   -36.736d {-36d 44' 08"} (1950)
  GRB_DATE:        18171 TJD;    53 DOY;   18/02/22
  GRB_TIME:        47403.54 SOD {13:10:03.54} UT
  TRIGGER_INDEX:   486
  GRB_PHI:          39.99 [deg]
  GRB_THETA:        11.38 [deg]
  DELTA_TIME:      -5.00 [sec]
  TRIGGER_DUR:     2.048 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     14.96 [sigma]
  IMAGE_SIGNIF:    7.78 [sigma]
  LC_URL:          sw00811235000msb.lc
  SUN_POSTN:       335.77d {+22h 23m 05s}  -10.09d {-10d 05' 13"}
  SUN_DIST:         75.12 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.80d {+03h 31m 13s}  +13.68d {+13d 41' 04"}
  MOON_DIST:       148.42 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.43 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      258.96,-13.88 [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 = 258.39,18.71 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 22 Feb 18 13:26:33 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.587d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.803d {-36d 48' 10"} (J2000)
  POINT_ROLL:      91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  47486.07 SOD {13:11:26.07} UT,   82.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        5.954
  N_STARS:         190
  X_OFFSET:        394 [pixels]
  Y_OFFSET:        610 [pixels]
  X_MAX:           1353 [pixels]
  Y_MAX:           1569 [pixels]
  DET_THRESH:      21
  PHOTO_THRESH:    12
  SL_URL:          sw00811235000msufc0082.fits
  SUN_POSTN:       335.77d {+22h 23m 05s}  -10.09d {-10d 05' 12"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.81d {+03h 31m 16s}  +13.69d {+13d 41' 14"}
  MOON_DIST:       148.42 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.88 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 22 Feb 18 13:26:46 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.587d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.803d {-36d 48' 10"} (J2000)
  POINT_ROLL:      91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  47486.07 SOD {13:11:26.07} UT,   82.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        5.954
  N_STARS:         190
  X_OFFSET:        394 [pixels]
  Y_OFFSET:        610 [pixels]
  X_MAX:           1353 [pixels]
  Y_MAX:           1569 [pixels]
  DET_THRESH:      21
  PHOTO_THRESH:    12
  SL_URL:          sw00811235000msufc0082.fits
  SUN_POSTN:       335.77d {+22h 23m 05s}  -10.09d {-10d 05' 12"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.82d {+03h 31m 16s}  +13.69d {+13d 41' 16"}
  MOON_DIST:       148.42 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.88 [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:     Thu 22 Feb 18 13:27:40 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     811235,   Seg_Num: 0
  GRB_RA:          256.5413d {+17h 06m 09.91s} (J2000),
                   256.8474d {+17h 07m 23.36s} (current),
                   255.6988d {+17h 02m 47.70s} (1950)
  GRB_DEC:         -36.8093d {-36d 48' 33.4"} (J2000),
                   -36.8325d {-36d 49' 57.1"} (current),
                   -36.7425d {-36d 44' 33.0"} (1950)
  GRB_ERROR:       3.7 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  47557.00 SOD {13:12:37.00} UT,   153.5 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       335.77d {+22h 23m 05s}  -10.09d {-10d 05' 11"}
  SUN_DIST:         75.15 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.83d {+03h 31m 18s}  +13.69d {+13d 41' 24"}
  MOON_DIST:       148.45 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.85,  2.45 [deg] galactic lon,lat of the burst
  ECL_COORDS:      258.93,-13.89 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        TAM values, flux and significance fields are not valid.  
  COMMENTS:        This position was automatically generated on the ground using  
  COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
  COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
  COMMENTS:        The probability that this is a serendipitous source in the  
  COMMENTS:        SPER window is 1.1% < P(seren) < 2.8%.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 22 Feb 18 13:28:14 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.587d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.803d {-36d 48' 10"} (J2000)
  ROLL:            91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  47486.07 SOD {13:11:26.07} UT,   82.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     540997906
  X_OFFSET:        713 [pixels]
  Y_OFFSET:        929 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       873
  Y_GRB_POS:       1089
  BINNING_INDEX:   1
  IM_URL:          sw00811235000msuni0103.fits
  SUN_POSTN:       335.77d {+22h 23m 05s}  -10.09d {-10d 05' 11"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.83d {+03h 31m 19s}  +13.69d {+13d 41' 29"}
  MOON_DIST:       148.43 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.88 [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:     Thu 22 Feb 18 13:28:27 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.587d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.803d {-36d 48' 10"} (J2000)
  ROLL:            91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  47486.07 SOD {13:11:26.07} UT,   82.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     540997906
  X_OFFSET:        713 [pixels]
  Y_OFFSET:        929 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       873
  Y_GRB_POS:       1089
  BINNING_INDEX:   1
  IM_URL:          sw00811235000msuni0103.fits
  SUN_POSTN:       335.77d {+22h 23m 05s}  -10.09d {-10d 05' 10"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.83d {+03h 31m 20s}  +13.69d {+13d 41' 31"}
  MOON_DIST:       148.43 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.88 [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:     Thu 22 Feb 18 13:35:51 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.588d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.802d {-36d 48' 06"} (J2000)
  POINT_ROLL:      91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  48276.25 SOD {13:24:36.25} UT,   872.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.698
  N_STARS:         190
  X_OFFSET:        154 [pixels]
  Y_OFFSET:        370 [pixels]
  X_MAX:           1593 [pixels]
  Y_MAX:           1809 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    5
  SL_URL:          sw00811235000msufc0872.fits
  SUN_POSTN:       335.78d {+22h 23m 07s}  -10.08d {-10d 05' 04"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.90d {+03h 31m 37s}  +13.71d {+13d 42' 37"}
  MOON_DIST:       148.49 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.87 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 22 Feb 18 13:36:09 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.588d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.802d {-36d 48' 06"} (J2000)
  POINT_ROLL:      91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  48276.25 SOD {13:24:36.25} UT,   872.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.698
  N_STARS:         190
  X_OFFSET:        154 [pixels]
  Y_OFFSET:        370 [pixels]
  X_MAX:           1593 [pixels]
  Y_MAX:           1809 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    5
  SL_URL:          sw00811235000msufc0872.fits
  SUN_POSTN:       335.78d {+22h 23m 07s}  -10.08d {-10d 05' 03"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.91d {+03h 31m 37s}  +13.71d {+13d 42' 39"}
  MOON_DIST:       148.49 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.87 [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:     Thu 22 Feb 18 13:36:56 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.588d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.802d {-36d 48' 06"} (J2000)
  ROLL:            91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  48276.25 SOD {13:24:36.25} UT,   872.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     540998696
  X_OFFSET:        713 [pixels]
  Y_OFFSET:        929 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       873
  Y_GRB_POS:       1089
  BINNING_INDEX:   1
  IM_URL:          sw00811235000msuni0893.fits
  SUN_POSTN:       335.78d {+22h 23m 07s}  -10.08d {-10d 05' 03"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.91d {+03h 31m 39s}  +13.71d {+13d 42' 46"}
  MOON_DIST:       148.50 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.87 [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:     Thu 22 Feb 18 13:37:05 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     811235,   Seg_Num: 0
  POINT_RA:        256.588d {+17h 06m 21s} (J2000)
  POINT_DEC:       -36.802d {-36d 48' 06"} (J2000)
  ROLL:            91.760d
  IMG_START_DATE:  18171 TJD;    53 DOY;   18/02/22
  IMG_START_TIME:  48276.25 SOD {13:24:36.25} UT,   872.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     540998696
  X_OFFSET:        713 [pixels]
  Y_OFFSET:        929 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       873
  Y_GRB_POS:       1089
  BINNING_INDEX:   1
  IM_URL:          sw00811235000msuni0893.fits
  SUN_POSTN:       335.78d {+22h 23m 07s}  -10.08d {-10d 05' 03"}
  SUN_DIST:         75.11 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
  MOON_POSTN:       52.91d {+03h 31m 40s}  +13.71d {+13d 42' 47"}
  MOON_DIST:       148.50 [deg]
  MOON_ILLUM:      41 [%]
  GAL_COORDS:      348.87,  2.42 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      258.97,-13.87 [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 #22433
  J. K. Cannizzo (NASA/UMBC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P. A. Evans (U Leicester), J.D. Gropp (PSU), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), Z. Liu (NAOC/U. Leicester), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), M. H. Siegel (PSU) and A. Tohuvavohu (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
  At 13:10:03 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 180222A (trigger=811235). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 256.571, -36.803, which is

     RA(J2000)  =  17h 06m 17s
     Dec(J2000) = -36d 48' 08"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single FRED-like peak with a duration of about 25 sec. The peak count rate was ~1400 counts/sec (15-350 keV), at ~2 sec after the trigger.
  The XRT began observing the field at 13:11:22.7 UT, 79.2 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source located at RA, Dec 256.54119, -36.80929 which is equivalent to:

     RA(J2000)  = 17h 06m 09.89s
     Dec(J2000) = -36d 48' 33.4"
  

  with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 88 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.
  A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (6.65 x 10^21 cm^-2, Willingale et al. 2013), with an excess column of 7.9 (+11.04/-4.96) x 10^21 cm^-2 (90% confidence).
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 82 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 97% of the XRT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the sub-image. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the region. No correction has been made for the large, but uncertain, extinction expected.
  Burst Advocate for this burst is J. K. Cannizzo (cannizzo 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 Circular #22434
  S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, V.Savchenko (ISDC, Versoix), L. Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report:
  a gamma ray burst lasting about 20 s has been detected by IBAS in the IBIS/ISGRI data at 13:10:02 UT of February 22, 2018
  The refined coordinates (J2000) are:

  R.A.= 256.5418 deg
  DEC.= -36.8016  deg
  

  with an uncertainty of 1.5 arcmin (90% c.l.).
  The burst had a peak flux of about 1 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 6e-7 erg/cmq.
  This burst was also detected by the Swift/BAT (Cannizzo et al., GCN 22433).
  A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
• GCN Circular #22435
  A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
  Using 2537 s of XRT Photon Counting mode data and 3 UVOT images for GRB 180222A, 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 = 256.54179, -36.81207 which is equivalent to:

  RA (J2000): 17h 06m 10.03s
  Dec (J2000): -36d 48' 43.4"
  

  with an uncertainty of 6.8 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 #22436
  D. M. Palmer (LANL), S. D. Barthelmy (GSFC), J. K. Cannizzo (NASA/UMBC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
  Using the data set from T-239 to T+423 sec from the recent telemetry downlink, we report further analysis of BAT GRB 180222A (trigger #811235) (Cannizzo, et al., GCN Circ. 22433). The BAT ground-calculated position is RA, Dec = 256.537, -36.819 deg which is

    RA(J2000)  =  17h 06m 08.8s
    Dec(J2000) = -36d 49' 08.2"
  

  with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 98%.
  The mask-weighted light curve consists of a single FRED pulse beginning at ~T-8 sec, peaking at T+0 sec and decaying to background by T+60 sec. T90 (15-350 keV) is 64.0 +- 22.6 sec (estimated error including systematics).
  The time-averaged spectrum from -15.1 to 48.9 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.40 +- 0.21. The fluence in the 15-150 keV band is 7.9 +- 1.0 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+8.44 sec in the 15-150 keV band is 0.4 +- 0.1 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/811235/BA/
• GCN Circular #22437
  A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), P.A. Evans (U. Leicester), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester) and J.K. Cannizzo report on behalf of the Swift-XRT team:
  We have analysed 10 ks of XRT data for GRB 180222A (Cannizzo et al. GCN Circ. 22433), from 82 s to 24.2 ks after the BAT trigger. The data comprise 54 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. 22435).
  The light curve can be modelled with a power-law decay with a decay index of alpha=2.25 (+0.19, -0.18).
  A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.7 (+0.6, -0.5). The best-fitting absorption column is 1.7 (+0.9, -0.8) x 10^22 cm^-2, in excess of the Galactic value of 6.6 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.4 x 10^-11 (9.2 x 10^-11) erg cm^-2 count^-1.
  A summary of the WT-mode spectrum is thus:

  Total column:	     1.7 (+0.9, -0.8) x 10^22 cm^-2
  Galactic foreground: 6.6 x 10^21 cm^-2
  Excess significance: 2.3 sigma
  Photon index:	     1.7 (+0.6, -0.5)
  

  If the light curve continues to decay with a power-law decay index of 2.25, the count rate at T+24 hours will be 1.1 x 10^-6 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.7 x 10^-17 (9.7 x 10^-17) erg cm^-2 s^-1.
  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00811235.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #22439
  S. A. Sebzda (PSU) and J. K. Cannizzo (NASA/UMBC) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 180222A 83 s after the BAT trigger (Cannizzo et al., GCN Circ. 22433). No optical afterglow consistent with the XRT position (Cannizzo et al. GCN Circ. 22433) 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            83          233          147         >20.6
  u_FC               295          545          246         >19.5
  white               83         1196          353         >21.6
  v                  624         1073           58         >18.0
  b                  551         1171           58         >18.6
  u                  295         1146          285         >19.7
  w1                 673         1122           58         >18.0
  m2                 649         1097           58         >18.0
  w2                 600         1221           78         >19.3
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 1.68 in the direction of the burst (Schlegel et al. 1998).