Gamma-ray Burst 230628E

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 28 Jun 23 22:26:36 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  GRB_RA:          171.841d {+11h 27m 22s} (J2000),
                   172.139d {+11h 28m 33s} (current),
                   171.209d {+11h 24m 50s} (1950)
  GRB_DEC:         -11.447d {-11d 26' 47"} (J2000),
                   -11.576d {-11d 34' 33"} (current),
                   -11.171d {-11d 10' 15"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       4462 [cnts]    Image_Peak=159 [image_cnts]
  TRIGGER_DUR:     2.048 [sec] 
  TRIGGER_INDEX:   262     E_range: 25-100 keV
  BKG_INTEN:       43200 [cnts]
  BKG_TIME:        80736.45 SOD {22:25:36.45} UT
  BKG_DUR:         24 [sec]
  GRB_DATE:        20123 TJD;   179 DOY;   23/06/28
  GRB_TIME:        80770.69 SOD {22:26:10.69} UT
  GRB_PHI:          -6.94 [deg]
  GRB_THETA:        46.22 [deg]
  SOLN_STATUS:     0x20000003
  RATE_SIGNIF:     11.13 [sigma]
  IMAGE_SIGNIF:    7.38 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +1  +2  -3  +0  +0 -16  +0 
  SUN_POSTN:        97.59d {+06h 30m 22s}  +23.25d {+23d 15' 07"}
  SUN_DIST:         80.76 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.68d {+14h 18m 42s}  -14.41d {-14d 24' 21"}
  MOON_DIST:        41.49 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.37 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      177.13,-13.73 [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 = 278.56,-2.75 [deg].  
  COMMENTS:           
  COMMENTS:        NOTE: This BAT event is temporally(16.0<100sec) coincident with the CALET_GBM event (trignum=1372026335).  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 28 Jun 23 22:29:57 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.449d {-11d 26' 56"} (J2000)
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  80988.37 SOD {22:29:48.37} UT,   217.7 [sec] since BAT Trigger Time
  COUNTS:          1    Min_needed= 20
  STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
  PH2_ITER:        0    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:     Wed 28 Jun 23 22:30:49 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  GRB_RA:          171.841d {+11h 27m 22s} (J2000),
                   172.139d {+11h 28m 33s} (current),
                   171.209d {+11h 24m 50s} (1950)
  GRB_DEC:         -11.447d {-11d 26' 47"} (J2000),
                   -11.576d {-11d 34' 33"} (current),
                   -11.171d {-11d 10' 15"} (1950)
  GRB_DATE:        20123 TJD;   179 DOY;   23/06/28
  GRB_TIME:        80770.69 SOD {22:26:10.69} UT
  TRIGGER_INDEX:   262
  GRB_PHI:          -6.94 [deg]
  GRB_THETA:        46.22 [deg]
  DELTA_TIME:      -63.00 [sec]
  TRIGGER_DUR:     2.048 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.13 [sigma]
  IMAGE_SIGNIF:    7.38 [sigma]
  LC_URL:          sw01177054000msb.lc
  SUN_POSTN:        97.59d {+06h 30m 23s}  +23.25d {+23d 15' 07"}
  SUN_DIST:         80.76 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.71d {+14h 18m 51s}  -14.42d {-14d 25' 18"}
  MOON_DIST:        41.52 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.37 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      177.13,-13.73 [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 = 278.56,-2.75 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 28 Jun 23 22:48:47 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.449d {-11d 26' 55"} (J2000)
  POINT_ROLL:      296.279d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  80991.85 SOD {22:29:51.85} UT,   221.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.992
  N_STARS:         19
  X_OFFSET:        490 [pixels]
  Y_OFFSET:        553 [pixels]
  X_MAX:           1449 [pixels]
  Y_MAX:           1512 [pixels]
  DET_THRESH:      14
  PHOTO_THRESH:    8
  SL_URL:          sw01177054000msufc0221.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.75 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.87d {+14h 19m 28s}  -14.49d {-14d 29' 19"}
  MOON_DIST:        41.67 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.36 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 28 Jun 23 22:49:15 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.449d {-11d 26' 55"} (J2000)
  ROLL:            296.279d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  80991.85 SOD {22:29:51.85} UT,   221.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     709684223
  X_OFFSET:        809 [pixels]
  Y_OFFSET:        872 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       969
  Y_GRB_POS:       1032
  BINNING_INDEX:   1
  IM_URL:          sw01177054000msuni0253.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.75 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.87d {+14h 19m 29s}  -14.49d {-14d 29' 26"}
  MOON_DIST:        41.67 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.36 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [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:     Wed 28 Jun 23 22:48:55 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.449d {-11d 26' 55"} (J2000)
  POINT_ROLL:      296.279d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  80991.85 SOD {22:29:51.85} UT,   221.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.992
  N_STARS:         19
  X_OFFSET:        490 [pixels]
  Y_OFFSET:        553 [pixels]
  X_MAX:           1449 [pixels]
  Y_MAX:           1512 [pixels]
  DET_THRESH:      14
  PHOTO_THRESH:    8
  SL_URL:          sw01177054000msufc0221.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.75 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.87d {+14h 19m 28s}  -14.49d {-14d 29' 21"}
  MOON_DIST:        41.67 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.36 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [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:     Wed 28 Jun 23 22:49:30 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.449d {-11d 26' 55"} (J2000)
  ROLL:            296.279d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  80991.85 SOD {22:29:51.85} UT,   221.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     709684223
  X_OFFSET:        809 [pixels]
  Y_OFFSET:        872 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       969
  Y_GRB_POS:       1032
  BINNING_INDEX:   1
  IM_URL:          sw01177054000msuni0253.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.75 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.87d {+14h 19m 29s}  -14.49d {-14d 29' 29"}
  MOON_DIST:        41.68 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.36 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [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:     Wed 28 Jun 23 22:49:41 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  GRB_RA:          171.8499d {+11h 27m 23.97s} (J2000),
                   172.1472d {+11h 28m 35.31s} (current),
                   171.2176d {+11h 24m 52.22s} (1950)
  GRB_DEC:         -11.4641d {-11d 27' 50.7"} (J2000),
                   -11.5936d {-11d 35' 36.9"} (current),
                   -11.1887d {-11d 11' 19.4"} (1950)
  GRB_ERROR:       4.1 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  80996.00 SOD {22:29:56.00} UT,   225.3 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.76 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.87d {+14h 19m 30s}  -14.49d {-14d 29' 31"}
  MOON_DIST:        41.67 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.33, 46.35 [deg] galactic lon,lat of the burst
  ECL_COORDS:      177.14,-13.75 [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 0.58% < P(seren) < 1.1%.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 28 Jun 23 22:51:27 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.448d {-11d 26' 51"} (J2000)
  POINT_ROLL:      296.278d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  81641.67 SOD {22:40:41.67} UT,   871.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.863
  N_STARS:         52
  X_OFFSET:        250 [pixels]
  Y_OFFSET:        313 [pixels]
  X_MAX:           1689 [pixels]
  Y_MAX:           1752 [pixels]
  DET_THRESH:      14
  PHOTO_THRESH:    7
  SL_URL:          sw01177054000msufc0870.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.74 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.89d {+14h 19m 34s}  -14.50d {-14d 29' 55"}
  MOON_DIST:        41.69 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.37 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 28 Jun 23 22:51:48 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.448d {-11d 26' 51"} (J2000)
  ROLL:            296.278d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  81641.67 SOD {22:40:41.67} UT,   871.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     709684873
  X_OFFSET:        809 [pixels]
  Y_OFFSET:        872 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       969
  Y_GRB_POS:       1032
  BINNING_INDEX:   1
  IM_URL:          sw01177054000msuni0902.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.74 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.89d {+14h 19m 34s}  -14.50d {-14d 30' 00"}
  MOON_DIST:        41.70 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.37 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [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:     Wed 28 Jun 23 22:51:57 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.448d {-11d 26' 51"} (J2000)
  ROLL:            296.278d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  81641.67 SOD {22:40:41.67} UT,   871.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     709684873
  X_OFFSET:        809 [pixels]
  Y_OFFSET:        872 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       969
  Y_GRB_POS:       1032
  BINNING_INDEX:   1
  IM_URL:          sw01177054000msuni0902.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.74 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.89d {+14h 19m 35s}  -14.50d {-14d 30' 02"}
  MOON_DIST:        41.70 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.37 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [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:     Wed 28 Jun 23 22:51:44 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  POINT_RA:        171.843d {+11h 27m 22s} (J2000)
  POINT_DEC:       -11.448d {-11d 26' 51"} (J2000)
  POINT_ROLL:      296.278d
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  81641.67 SOD {22:40:41.67} UT,   871.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.863
  N_STARS:         52
  X_OFFSET:        250 [pixels]
  Y_OFFSET:        313 [pixels]
  X_MAX:           1689 [pixels]
  Y_MAX:           1752 [pixels]
  DET_THRESH:      14
  PHOTO_THRESH:    7
  SL_URL:          sw01177054000msufc0870.fits
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.74 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.89d {+14h 19m 34s}  -14.50d {-14d 29' 59"}
  MOON_DIST:        41.70 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.31, 46.37 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      177.13,-13.73 [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:     Wed 28 Jun 23 22:51:58 UT
  NOTICE_TYPE:     Swift-XRT Position UPDATE
  TRIGGER_NUM:     1177054,   Seg_Num: 0
  GRB_RA:          171.8486d {+11h 27m 23.66s} (J2000),
                   172.1459d {+11h 28m 35.00s} (current),
                   171.2163d {+11h 24m 51.90s} (1950)
  GRB_DEC:         -11.4640d {-11d 27' 50.4"} (J2000),
                   -11.5935d {-11d 35' 36.5"} (current),
                   -11.1886d {-11d 11' 19.0"} (1950)
  GRB_ERROR:       1.9 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  20123 TJD;   179 DOY;   23/06/28
  IMG_START_TIME:  80996.00 SOD {22:29:56.00} UT,   225.3 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:        97.61d {+06h 30m 26s}  +23.25d {+23d 15' 04"}
  SUN_DIST:         80.76 [deg]   Sun_angle= -5.0 [hr] (East of Sun)
  MOON_POSTN:      214.89d {+14h 19m 35s}  -14.50d {-14d 30' 02"}
  MOON_DIST:        41.69 [deg]
  MOON_ILLUM:      75 [%]
  GAL_COORDS:      272.33, 46.35 [deg] galactic lon,lat of the burst
  ECL_COORDS:      177.14,-13.75 [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 #34110
  CRESSTII), C. Salvaggio (INAF-OAB), T. Sbarrato (INAF-OAB), M. H. Siegel (PSU) and M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
  At 22:26:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located= GRB 230628E (trigger=3D1177054). Swift slewed immediately to the burst. = The BAT on-board calculated location is=20 RA, Dec 171.841, -11.447 which is=20

     RA(J2000) =3D 11h 27m 22s
     Dec(J2000) =3D -11d 26' 47"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systema= tic uncertainty). The BAT light curve showed a single peaked structure wit= h a duration of about 5 sec. The peak count rate was ~600 counts/sec (15-3= 50 keV), at ~0 sec after the trigger.
  The XRT began observing the field at 22:29:48.3 UT, 217.7 seconds after the= BAT trigger. Using promptly downlinked data we find a bright, uncatalogued= X-ray source located at RA, Dec 171.8499, -11.4641 which is equivalent to:

     RA(J2000)  =3D +11h 27m 23.77s=20
     Dec(J2000) =3D -11d 27' 50.2=E2=80=9D
  

  with an uncertainty of 1.9 arcseconds (radius, 90% containment). This posi= tion may be improved as more data are received; the latest position is avai= lable at https://www.swift.ac.uk/sper. No spectrum from the promptly downlinked event data is yet available to determine the column den= sity.
  UVOT took a finding chart exposure of 150 seconds with the White filter sta= rting 221 seconds after the BAT trigger. No credible afterglow candidate h= as been found in the initial data products. The 2.7'x2.7' sub-image covers = none of the XRT error circle. The 8'x8' region for the list of sources gene= rated 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 e= xpected extinction corresponding to E(B-V) of 0.040.
  Burst Advocate for this burst is N. J. Klingler (noelklin AT umbc.edu). Ple= ase 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 s= ite for information: http://www.swift.psu.edu/)
• GCN Circular #34111
  V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (Lomonosov Moscow State University, SAI, Physics Department),
  R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),
  R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
  D. Buckley (South African Astronomical Observatory),
  O.A. Gres, N.M. Budnev (Irkutsk State University, API),
  L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),
  A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
  A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)
  MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB230628.93 (trigger No 1177054,11h 27m 21.84s , -11d 26m 49.2s, R=0.05) errorbox 4426 sec after notice time and 4457 sec after trigger time at 2023-06-28 23:40:27 UT, with upper limit up to 18.1 mag. The observations began at zenith distance = 35 deg. The sun altitude is -24.6 deg.
  The galactic latitude b = 46 deg., longitude l = 273 deg.
  Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2230049
  We obtain a following upper limits.

  Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
  _________|_____________________|_____|_______|______|________
  
      4487 |         MASTER-OAFA |   C |    60 | 18.0 |        
      4579 |         MASTER-OAFA |   C |    60 | 18.1 |        
      4672 |         MASTER-OAFA |   C |    60 | 18.1 |        
      4764 |         MASTER-OAFA |   C |    60 | 18.0 |        
  

  Filter C is a clear (unfiltred) band.
  The observation and reduction will continue. The message may be cited.
• GCN Circular #34112
  R. Strausbaugh (University of Minnesota), A. Cucchiara (NASA) report on behalf of a larger collaboration:
  We observed the GRB 230628E (Klingler et al., GCN 34110) field with the LCOGT 1-meter Sinistro instrument at the Cerro Tololo Interamerican Observatory, Chile site, on June 28, from 23:08 to 23:40 UT (corresponding to 0.70 to 1.23 hours from the GRB trigger time) with the SDSS r and i filters.
  We performed a series of 3x300s exposures in each band. We do not detect a source within the Swift-XRT error region (Klingler et al., GCN 34110) in either band.
  The following upper limits are calculated using the PanSTARRS catalog as reference:

  r > 19.2
  i > 19.0
  

  These magnitudes are not corrected for galactic extinction.
• GCN Circular #34115
  A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
  Using 3999 s of XRT Photon Counting mode data and 9 UVOT images for GRB 230628A, 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 = 171.84876, -11.46370 which is equivalent to:

  RA (J2000): 11h 27m 23.70s
  Dec (J2000): -11d 27' 49.3"
  

  with an uncertainty of 2.1 arcsec (radius, 90% confidence).
  This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
  This circular was automatically generated, and is an official product of the Swift-XRT team.
• GCN Circular #34116
  K.L. Page and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:
  GCN 34115 incorrectly referred to GRB 230628A; the enhanced position given was instead for GRB 230628E. We repeat the details here, with the correct name:
  Using 3999 s of XRT Photon Counting mode data and 9 UVOT images for GRB 230628E, 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 = 171.84876, -11.46370 which is equivalent to:

  RA (J2000): 11h 27m 23.70s
  Dec (J2000): -11d 27' 49.3"
  

  with an uncertainty of 2.1 arcsec (radius, 90% confidence).
  This position may be improved as more data are received. The latest position can be viewed at https://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 is an official product of the Swift-XRT team.
• GCN Circular #34117
  J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), M. Capalbi (INAF-IASFPA), M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), D.N. Burrows (PSU) and P.A. Evans report on behalf of the Swift-XRT team:
  We have analysed 6.3 ks of XRT data for GRB 230628E, from 226 s to 22.6 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode.
  The light curve can be modelled with a power-law decay with a decay index of alpha=0.85 (+/-0.05).
  A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.94 (+/-0.18). The best-fitting absorption column is 9.5 (+4.9, -4.3) x 10^20 cm^-2, in excess of the Galactic value of 4.3 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (4.1 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     9.5 (+4.9, -4.3) x 10^20 cm^-2
  Galactic foreground: 4.3 x 10^20 cm^-2
  Excess significance: 2.0 sigma
  Photon index:	     1.94 (+/-0.18)
  

  If the light curve continues to decay with a power-law decay index of 0.85, the count rate at T+24 hours will be 8.1 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.8 x 10^-13 (3.3 x 10^-13) erg cm^-2 s^-1.
  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/01177054.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #34118
  D. B. Malesani (Radboud Univ. and DAWN/NBI) and J. Palmerio (GEPI / Paris Obs.) report on behalf of the STARGATE collaboration:
  We observed the field of GRB 230628E (Salvaggio et al., GCN 34110) with the ESO VLT UT3 (Melipal) equipped with the X-shooter acquisition camera. In a single 30 s exposure acquired in the r band, with mid time June 29.0252 UT (2.17 hr after the GRB), we see a new object, very close to the Swift/XRT position, which is not visible in the Pan-STARRS images of this field. Its coordinates (J2000, calibrated against the Gaia catalog, 0.5" error) are:

   RA = 11:27:23.60
   Dec = -11:27:49.21
  

  Preliminary photometry (against the Pan-STARRS catalog) yields a magnitude r = 21.2 We consider this object a strong candidate as the afterglow of GRB 230628E, due to its consistency with the X-ray position and lack of detection in the Pan-STARRS archival images. Further observations are in progress. We acknowledge expert support from the observing staff in Paranal, in particular Eleonora Sani (to whom we wish a happy birthday), Thomas Romain (on his last observing night in Paranal), Ditte Slumstrup (who actually discovered the afterglow), and Thomas Rivinius.
• GCN Circular #34122
  J. T. Palmerio (GEPI / Paris Obs. and IAP), D. B. Malesani (Radboud Univ. and DAWN/NBI), A. Saccardi (GEPI / Paris Obs.), L. Izzo (INAF/OACn & DARK/NBI), P. Schady (Univ. Bath), A. de Ugarte Postigo (OCA) report on behalf of the STARGATE collaboration:
  We observed the optical afterglow candidate of GRB 230628E (Malesani et al. GCN 34118) with the ESO VLT UT3 (Melipal) equipped with the X-shooter spectrograph. Spectroscopy was carried out, covering the wavelength range 3000-21000 AA, and consisting of 4 exposures of 600 s each. The observation mid time was 2023 June 29 at 01:05 UT (~2.7 hours after the GRB).
  Only a faint continuum is detected from this source down to ~3700 Angstrom, which allows us to set a redshift upper limit z <~ 2. We note a possible, very faint emission feature at ~15550 Angstrom but in the absence of other associated emission features, we do not derive a redshift from this.
  We acknowledge expert support from the observing staff in Paranal, in particular Eleonora Sani, Thomas Romain, Ditte Slumstrup, and Thomas Rivinius.
• GCN Circular #34132
  G. E. Anderson (Curtin), J. K. Leung (USyd), A. J. van der Horst (GWU), A. Gulati (USyd), L. Rhodes (Oxford), S. Chastain (UNM) on behalf of the PanRadio GRB collaboration
  The Australia Telescope Compact Array (ATCA) rapidly performed observations of the long GRB 230628E (Klingler et al. GCN 34110) at 5.5, 9, 16.7 and 21.2 GHz as part of the Large ATCA =E2=80=9CPanRadio GRB=E2=80=9D follow-up programme C3542 (PI. Anderson). ATCA was on target observing at 2023-06-29 02:11 UT when the source had risen above the horizon, just 3.75 hrs post-burst and observed for 10.5 hrs. There is no radio source coincident with the enhanced XRT position (Page et al. GCN 34116) with 3 sigma upper limits of 44, 39, 54 and 78 microJy/beam at 5.5, 9.0, 16.7 and 21.2 GHz, respectively. Further observations are planned.
  We thank the CSIRO Space and Astronomy staff for supporting these observations and maintaining the ATCA rapid-response observing mode.
  We acknowledge the Gomeroi people as the traditional owners of the Observatory site. The Australia Telescope Compact Array is part of the Australia Telescope National Facility (https://ror.org/05qajvd42) which is funded by th= e Australian Government for operation as a National Facility managed by CSIRO.
• GCN Circular #34134
  T. Parsotan (GSFC/UMBC), S. D. Barthelmy (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), 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 230628E (trigger #1177054) (Salvaggio et al., GCN Circ. 34110). The BAT ground-calculated position is RA, Dec = 171.851, -11.430 deg which is

     RA(J2000)  =  11h 27m 24.3s
     Dec(J2000) = -11d 25' 46.5"
  

  with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 41%.
  The BAT light curve shows a complex structure with a duration of ~ 15 sec. T90 (15-350 keV) is 4.72 +- 1.08 sec (estimated error including systematics).
  The time-averaged spectrum from T-0.50 to T+4.81 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.45 +- 0.30. The fluence in the 15-150 keV band is 3.3 +- 0.6 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+0.33 sec in the 15-150 keV band is 1.1 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
  The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/1177054/BA/
• GCN Circular #34135
  S. R. Oates (U. Birmingham) and N. Klingler (NASA-GSFC/UMBC/CRESST II) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 230628E 221 s after the BAT trigger (Klingler et al., GCN Circ. 34110). A source consistent with the XRT position (Page et al., GCN Circ. 34116) and the optical position (Malesani et al., GCN Circ. 34118) is detected in the initial UVOT exposures.
  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 (FC)         221          371          167         20.10 +/- 0.20
  wh                 501         1194          223         20.69 +/- 0.34       
  v                  379         1243           68        >19.1
  b                  477         1170           78        >19.9
  u                  452         1145           78        >19.6
  w1                 428         1120           78        >19.4
  m2                1249         1269           19        >18.2
  w2                 700          720           19        >18.5
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.040 in the direction of the burst (Schlegel et al. 1998).