Gamma-ray Burst 220706A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:09:45 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1114937,   Seg_Num: 0
GRB_RA:            0.587d {+00h 02m 21s} (J2000),
                   0.875d {+00h 03m 30s} (current),
                 359.947d {+23h 59m 47s} (1950)
GRB_DEC:         -16.391d {-16d 23' 28"} (J2000),
                 -16.266d {-16d 15' 57"} (current),
                 -16.670d {-16d 40' 10"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       7285 [cnts]    Image_Peak=281 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   443     E_range: 15-50 keV
BKG_INTEN:       71107 [cnts]
BKG_TIME:        58122.55 SOD {16:08:42.55} UT
BKG_DUR:         24 [sec]
GRB_DATE:        19766 TJD;   187 DOY;   22/07/06
GRB_TIME:        58154.29 SOD {16:09:14.29} UT
GRB_PHI:         123.76 [deg]
GRB_THETA:        21.15 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.61 [sigma]
IMAGE_SIGNIF:    8.84 [sigma]
MERIT_PARAMS:     +1  +0  +0  +1  +1  -1  +0  +0 +34  +0 
SUN_POSTN:       105.83d {+07h 03m 18s}  +22.64d {+22d 38' 17"}
SUN_DIST:        109.66 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      189.98d {+12h 39m 55s}   -0.66d {-00d 39' 53"}
MOON_DIST:       160.83 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.78,-74.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      353.86,-15.24 [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 = 212.12,-8.74 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:11:03 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.594d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 04"} (J2000)
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58257.06 SOD {16:10:57.06} UT,   102.8 [sec] since BAT Trigger Time
COUNTS:          14    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:     Wed 06 Jul 22 16:13:11 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1114937,   Seg_Num: 0
GRB_RA:            0.587d {+00h 02m 21s} (J2000),
                   0.875d {+00h 03m 30s} (current),
                 359.947d {+23h 59m 47s} (1950)
GRB_DEC:         -16.391d {-16d 23' 28"} (J2000),
                 -16.266d {-16d 15' 57"} (current),
                 -16.670d {-16d 40' 10"} (1950)
GRB_DATE:        19766 TJD;   187 DOY;   22/07/06
GRB_TIME:        58154.29 SOD {16:09:14.29} UT
TRIGGER_INDEX:   443
GRB_PHI:         123.76 [deg]
GRB_THETA:        21.15 [deg]
DELTA_TIME:      26.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.61 [sigma]
IMAGE_SIGNIF:    8.84 [sigma]
LC_URL:          sw01114937000msb.lc
SUN_POSTN:       105.83d {+07h 03m 19s}  +22.64d {+22d 38' 17"}
SUN_DIST:        109.66 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.00d {+12h 40m 01s}   -0.68d {-00d 40' 44"}
MOON_DIST:       160.81 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.78,-74.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      353.86,-15.24 [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 = 212.12,-8.74 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:13:58 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 04"} (J2000)
POINT_ROLL:      71.322d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58261.60 SOD {16:11:01.60} UT,   107.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.361
N_STARS:         12
X_OFFSET:        424 [pixels]
Y_OFFSET:        609 [pixels]
X_MAX:           1383 [pixels]
Y_MAX:           1568 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw01114937000msufc0107.fits
SUN_POSTN:       105.83d {+07h 03m 19s}  +22.64d {+22d 38' 16"}
SUN_DIST:        109.65 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.01d {+12h 40m 03s}   -0.68d {-00d 40' 55"}
MOON_DIST:       160.81 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.23 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:14:12 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 04"} (J2000)
POINT_ROLL:      71.322d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58261.60 SOD {16:11:01.60} UT,   107.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.361
N_STARS:         12
X_OFFSET:        424 [pixels]
Y_OFFSET:        609 [pixels]
X_MAX:           1383 [pixels]
Y_MAX:           1568 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw01114937000msufc0107.fits
SUN_POSTN:       105.83d {+07h 03m 19s}  +22.64d {+22d 38' 16"}
SUN_DIST:        109.65 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.01d {+12h 40m 03s}   -0.68d {-00d 40' 59"}
MOON_DIST:       160.81 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.23 [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 06 Jul 22 16:15:52 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     1114937,   Seg_Num: 0
GRB_RA:            0.6039d {+00h 02m 24.93s} (J2000),
                   0.8919d {+00h 03m 34.04s} (current),
                 359.9638d {+23h 59m 51.30s} (1950)
GRB_DEC:         -16.4109d {-16d 24' 39.2"} (J2000),
                 -16.2856d {-16d 17' 08.1"} (current),
                 -16.6893d {-16d 41' 21.4"} (1950)
GRB_ERROR:       4.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58362.00 SOD {16:12:42.00} UT,   207.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       105.83d {+07h 03m 20s}  +22.64d {+22d 38' 16"}
SUN_DIST:        109.65 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.03d {+12h 40m 06s}   -0.69d {-00d 41' 23"}
MOON_DIST:       160.78 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.77,-74.39 [deg] galactic lon,lat of the burst
ECL_COORDS:      353.86,-15.26 [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 0.11% < P(seren) < 0.58%.

GCN Circular #32329
A. D'Ai (INAF-IASFPA), E. Ambrosi (INAF-IASFPA), V. D'Elia (SSDC & INAF-OAR), J.D. Gropp (PSU), J. A. Kennea (PSU), N. J. Klingler (GSFC/UMBC/CRESSTII), S. Laha (GSFC/UMBC), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), T. M. Parsotan (GSFC/UMBC/CRESSTII), M. H. Siegel (PSU) and M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift Observatory Team:
At 16:09:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 220706A (trigger=1114937). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 0.587, -16.391 which is
```
   RA(J2000) = 00h 02m 21s
   Dec(J2000) = -16d 23' 28"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 50 sec. The peak count rate was ~1400 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 16:10:57.0 UT, 102.8 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 0.60368, -16.41065 which is equivalent to:
```
   RA(J2000)  = 00h 02m 24.88s
   Dec(J2000) = -16d 24' 38.3"
```
with an uncertainty of 3.5 arcseconds (radius, 90% containment). This location is 91 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 https://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 (2.40 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 6.6 (+4.12/-3.33) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 107 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 0.025.
Burst Advocate for this burst is A. D'Ai (antonino.dai AT inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:37:49 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 06"} (J2000)
ROLL:            71.323d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58474.23 SOD {16:14:34.23} UT,   319.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     678816903
X_OFFSET:        743 [pixels]
Y_OFFSET:        928 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1088
BINNING_INDEX:   1
IM_URL:          sw01114937000msuni0349.fits
SUN_POSTN:       105.85d {+07h 03m 23s}  +22.64d {+22d 38' 10"}
SUN_DIST:        109.67 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.20d {+12h 40m 49s}   -0.78d {-00d 46' 48"}
MOON_DIST:       160.64 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.24 [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:     Wed 06 Jul 22 16:38:04 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 06"} (J2000)
ROLL:            71.323d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58474.23 SOD {16:14:34.23} UT,   319.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     678816903
X_OFFSET:        743 [pixels]
Y_OFFSET:        928 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1088
BINNING_INDEX:   1
IM_URL:          sw01114937000msuni0349.fits
SUN_POSTN:       105.85d {+07h 03m 23s}  +22.64d {+22d 38' 10"}
SUN_DIST:        109.67 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.20d {+12h 40m 49s}   -0.78d {-00d 46' 52"}
MOON_DIST:       160.63 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.24 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:43:15 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 06"} (J2000)
POINT_ROLL:      71.323d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  59029.83 SOD {16:23:49.83} UT,   875.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.344
N_STARS:         29
X_OFFSET:        184 [pixels]
Y_OFFSET:        369 [pixels]
X_MAX:           1623 [pixels]
Y_MAX:           1808 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw01114937000msufc0875.fits
SUN_POSTN:       105.85d {+07h 03m 24s}  +22.64d {+22d 38' 09"}
SUN_DIST:        109.67 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.25d {+12h 40m 59s}   -0.80d {-00d 48' 09"}
MOON_DIST:       160.60 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:43:34 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1114937,   Seg_Num: 0
GRB_RA:            0.6045d {+00h 02m 25.08s} (J2000),
                   0.8925d {+00h 03m 34.19s} (current),
                 359.9644d {+23h 59m 51.45s} (1950)
GRB_DEC:         -16.4110d {-16d 24' 39.6"} (J2000),
                 -16.2857d {-16d 17' 08.4"} (current),
                 -16.6894d {-16d 41' 21.8"} (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:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58362.00 SOD {16:12:42.00} UT,   207.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       105.85d {+07h 03m 24s}  +22.64d {+22d 38' 09"}
SUN_DIST:        109.67 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.25d {+12h 41m 00s}   -0.80d {-00d 48' 13"}
MOON_DIST:       160.58 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.77,-74.39 [deg] galactic lon,lat of the burst
ECL_COORDS:      353.87,-15.26 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:43:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 06"} (J2000)
POINT_ROLL:      71.323d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  59029.83 SOD {16:23:49.83} UT,   875.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.344
N_STARS:         29
X_OFFSET:        184 [pixels]
Y_OFFSET:        369 [pixels]
X_MAX:           1623 [pixels]
Y_MAX:           1808 [pixels]
DET_THRESH:      22
PHOTO_THRESH:    13
SL_URL:          sw01114937000msufc0875.fits
SUN_POSTN:       105.85d {+07h 03m 24s}  +22.64d {+22d 38' 09"}
SUN_DIST:        109.67 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.25d {+12h 40m 59s}   -0.80d {-00d 48' 11"}
MOON_DIST:       160.59 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.24 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #32330
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 220706A, we find an enhanced XRT position of the afterglow: RA, Dec: 0.60455, -16.41107 which is equivalent to:
```
   RA (J2000)  = 00 02 25.09
   Dec (J2000) = -16 24 39.9
```
with an uncertainty of 1.9 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/1114937.
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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Jul 22 16:15:25 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 04"} (J2000)
ROLL:            71.322d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58261.60 SOD {16:11:01.60} UT,   107.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     678816691
X_OFFSET:        743 [pixels]
Y_OFFSET:        928 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1088
BINNING_INDEX:   1
IM_URL:          sw01114937000msuni0137.fits
SUN_POSTN:       105.83d {+07h 03m 19s}  +22.64d {+22d 38' 16"}
SUN_DIST:        109.65 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.02d {+12h 40m 05s}   -0.69d {-00d 41' 17"}
MOON_DIST:       160.80 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.23 [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 06 Jul 22 16:15:32 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1114937,   Seg_Num: 0
POINT_RA:          0.595d {+00h 02m 23s} (J2000)
POINT_DEC:       -16.385d {-16d 23' 04"} (J2000)
ROLL:            71.322d
IMG_START_DATE:  19766 TJD;   187 DOY;   22/07/06
IMG_START_TIME:  58261.60 SOD {16:11:01.60} UT,   107.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     678816691
X_OFFSET:        743 [pixels]
Y_OFFSET:        928 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1088
BINNING_INDEX:   1
IM_URL:          sw01114937000msuni0137.fits
SUN_POSTN:       105.83d {+07h 03m 19s}  +22.64d {+22d 38' 16"}
SUN_DIST:        109.65 [deg]   Sun_angle= 7.0 [hr] (West of Sun)
MOON_POSTN:      190.02d {+12h 40m 06s}   -0.69d {-00d 41' 18"}
MOON_DIST:       160.80 [deg]
MOON_ILLUM:      46 [%]
GAL_COORDS:       73.81,-74.36 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      353.87,-15.23 [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 #32331
B. Gendre, E. Moore, J. A. Moore, F. Panther (OzGrav-UWA), A. Klotz (IRAP-CNRS-OMP), P. Thierry (Les Makes observatory), and D. Coward (OzGrav-UWA), report:
We imaged the field of GRB 220706A detected by SWIFT (trigger 1114937, D'Ai et al. GCN 32329) with the Zadko robotic telescope (D=100cm) located at the observatory - Gingin, Australia.
The observations started 157.6s after the GRB trigger (123.9s after the notice). The elevation of the field increased from 18 degrees above horizon and weather conditions were good. At the position of the X-ray afterglow reported by Evans et al. (GCN 32330), we do not detect any source using a clear filter. t0+157.6s to t0+167.6s : R > 14.5
We co-added a series of long exposures: t0+1414s to t0+1962s : R > 17.0
Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.
N.B. Galactic coordinates are lon= 73.7767 lat=-74.3612
This message may be cited.
GCN Circular #32332
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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB 220706A ( A. D'Ai et al., GCN 32329) errorbox 22935 sec after notice time and 22975 sec after trigger time at 2022-07-06 22:32:09 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 71 deg. The sun altitude is -80.3 deg.
The galactic latitude b = -75 deg., longitude l = 76 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2023835
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   23065 |         MASTER-SAAO |   C |   180 | 18.2 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #32333
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 822 s of XRT Photon Counting mode data and 1 UVOT images for GRB 220706A, 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 = 0.60427, -16.41121 which is equivalent to:
```
RA (J2000): 00h 02m 25.03s
Dec (J2000): -16d 24' 40.4"
```
with an uncertainty of 2.2 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 Notice

  
TITLE:           GCN/MAXI NOTICE
NOTICE_DATE:     Thu 07 Jul 22 00:11:20 UT
NOTICE_TYPE:     MAXI Unknown Source Position
EVENT_ID_NUM:      9766598157
EVENT_RA:          0.22d {+00h 00m 53s} (J2000),
                   0.51d {+00h 02m 02s} (current),
                 359.58d {+23h 58m 19s} (1950)
EVENT_DEC:       -16.47d {-16d 28' 15"} (J2000),
                 -16.35d {-16d 20' 43"} (current),
                 -16.75d {-16d 44' 57"} (1950)
EVENT_ERROR:     1.0 [deg radius, stat+sys, 90% containment]
EVENT_FLUX:      219.0 +- 0.0 [mCrab]
EVENT_DATE:      19766 TJD;   187 DOY;   22/07/06
EVENT_TIME:      63205.00 SOD {17:33:25.00} UT
EVENT_TSCALE:    30s
EVENT_EBAND:     Medium, 4-10 keV
SUN_POSTN:       106.17d {+07h 04m 41s}  +22.60d {+22d 36' 12"}
SUN_DIST:        110.32 [deg]
MOON_POSTN:      193.86d {+12h 55m 27s}   -2.65d {-02d 39' 08"}
MOON_DIST:       156.87 [deg]
MOON_ILLUM:      49 [%]
GAL_COORDS:       72.65,-74.17 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      353.49,-15.16 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        MAXI Unknown Source Position. GRB or unknown X-ray Transient.

GCN Circular #32334
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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB220706.73 (trigger No 766598157,00h 00m 52.56s , -16d 28m 15.6s, R=1) errorbox 17924 sec after trigger time at 2022-07-06 22:32:09 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 71 deg. The sun altitude is -80.3 deg.
The galactic latitude b = -74 deg., longitude l = 75 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2024084
We obtain a following upper limits.

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   18015 | 2022-07-06 22:32:09 |         MASTER-SAAO | (00h 01m 08.23s , -16d 37m 31.4s) |   C |   180 | 18.2 |        
   18533 | 2022-07-06 22:40:48 |         MASTER-SAAO | (00h 01m 10.85s , -16d 39m 30.3s) |   C |   180 | 18.6 |        
   19542 | 2022-07-06 22:57:37 |         MASTER-SAAO | (00h 01m 07.37s , -16d 40m 01.9s) |   C |   180 | 19.0 |        
   20543 | 2022-07-06 23:14:17 |         MASTER-SAAO | (00h 01m 06.20s , -16d 38m 08.9s) |   C |   180 | 18.9 |        
   20545 | 2022-07-06 23:14:19 |             MASTER- | (23h 55m 03.49s , -16d 16m 28.7s) |   C |   180 | 18.1 |        
   20737 | 2022-07-06 23:17:32 |             MASTER- | (23h 55m 04.59s , -16d 15m 04.9s) |   C |   180 | 18.2 |        
   21179 | 2022-07-06 23:24:54 |             MASTER- | (23h 55m 03.08s , -16d 15m 35.0s) |   C |   180 | 18.3 |        
   21542 | 2022-07-06 23:30:57 |             MASTER- | (23h 55m 04.89s , -16d 16m 38.8s) |   C |   180 | 18.3 |        
   22242 | 2022-07-06 23:42:37 |         MASTER-SAAO | (00h 01m 07.61s , -16d 38m 45.4s) |   C |   180 | 18.8 |        
   22599 | 2022-07-06 23:48:33 |             MASTER- | (23h 55m 02.70s , -16d 13m 38.8s) |   C |   180 | 18.4 |        
   22795 | 2022-07-06 23:51:50 |             MASTER- | (23h 55m 08.23s , -16d 14m 43.7s) |   C |   180 | 18.4 |        
   23293 | 2022-07-07 00:00:08 |             MASTER- | (23h 55m 09.06s , -16d 14m 51.7s) |   C |   180 | 18.4 |        
   23293 | 2022-07-07 00:00:08 |             MASTER- | (00h 03m 13.38s , -16d 22m 24.5s) |   C |   180 | 14.8 |

Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.

GCN Circular #32335
S.Q. Jiang (NAOC), Z.P. Zhu (NAOC,HUST), S.Y. Fu , X. Liu, D. Xu (NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:
We observed the field of GRB 220706A detected by Swift (D'Ai et al., GCN 32329) using the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained 7x200 s frames in the Sloan r-band and 5x200 s frames in the Sloan z-band, starting at 20:21:09 UT on 2022-07-06, i.e., 4.2 hr after the BAT trigger.
No optical source is detected in our stacked images at the enhanced XRT position (Goad et al., GCN 32333), with upper limits as follows:
```
T_mid-T0 (hr)    Filter   Upper limit(3-sigma)
    4.41                 r          >20.7
    4.79                 z          >18.8
```
calibrated with the nearby PanSTARRS field and not corrected for Galactic extinction.
GCN Circular #32337
M. Serino, T. Sakamoto (AGU), W. Iwakiri (Chuo U.), H. Negoro (Nihon U.), Y. Kawakubo (LSU), N. Kawai, M. Niwano, R. Hosokawa, Y. Imai, N. Ito, Y. Takamatsu (Tokyo Tech), M. Nakajima, K. Kobayashi, M. Tanaka, Y. Soejima (Nihon U.), T. Mihara, T. Kawamuro, S. Yamada, T. Tamagawa, M. Matsuoka (RIKEN), S. Sugita, H. Hiramatsu, A. Yoshida (AGU), Y. Tsuboi, J. Kohara (Chuo U.), M. Shidatsu, M. Iwasaki (Ehime U.), S. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, M. Tominaga, T. Nagatsuka, T. Kurihara (JAXA), Y. Ueda, S. Ogawa, K. Setoguchi, T. Yoshitake, K. Inaba (Kyoto U.), H. Tsunemi (Osaka U.), M. Yamauchi, T. Sato, R. Hatsuda, R. Fukuoka, Y. hagiwara, Y. Umeki (Miyazaki U.), K. Yamaoka (Nagoya U.), M. Sugizaki (NAOC)
report on behalf of the MAXI team: The MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source at 17:33:25 UT on 2022 July 6 at
(R.A., Dec) = (0.219 deg, -16.471 deg) (J2000)
This position was consistent with GRB 220607A (GCN #32329) and the scan transit was 5051 sec after the BAT trigger time (T0). The scan was not completed because the GSC HV turned off due to the high latitude constraint. The preliminary observed flux was about 200 mCrab in the 2 - 10 keV band. The transient was also observed at the next scan transit (17:53, T0+6260s) and the flux decayed to about 60 mCrab in the same energy band. We note that Swift/XRT also detected bright X-ray flare around T0+5400s. There was no significant excess flux in the previous transit at 16:00 UT and in the third transit at 19:26 UT with an upper limit of 20 mCrab for each. Since the X-ray flaring activity of this GRB was unusual, we encourage multi-wavelength observations.
GCN Circular #32338
A. de Ugarte Postigo, (OCA), D.B. Malesani (Radboud Univ. and DAWN/NBI), and A. Kasikov (NOT, Aarhus Univ, Univ. of Tartu) report on behalf of a larger collaboration,
We observed the field of GRB 220706A (D’Ai et al. GCN 32329) with AlFOSC on the 2.5m NOT telescope at Roque de los Muchachos Observatory (La Palma, Spain). The observation started at 04:33 UT (11.68 hrs after the burst) and consisted on 3x300s imaging in r-band and 5x200s in z-band.
No new object is detected within the refined XRT error box (Evans et al. GCN 32330) in neither of the bands. The 3-signa detection limit in the r-band is 24.5 mag and 23.6 in z-band, calibrated with respect to Pan-STARRS field stars. Our non detection is consistent with previous reports (Gendre et al. GCN 32331, Lipunov et al. GCN 32332, Jiang et al. GCN 32335).
We do note that there is a faint source at the Northern edge of the error box, at a distance of ~2.9“ from the centre of the XRT position, which is also marginally detected in the Pan-STARRS images, and for which we measure a magnitude of 24.1+/-0.3, with coordinates (J2000):
```
R.A.: 00:02:25.01
Dec.: -16:24:37.0
```
GCN Circular #32339
A. Nicuesa Guelbenzu, S. Klose (both TLS Tautenburg), and A. Rau (MPE Garching) report:
We observed the field of GRB 220706A (D�Ai et al., GCN 32329) with GROND mounted at the 2.2m MPG telescope at La Silla Observatory (Chile).
Observations started at a midtime of 09:40 UT on July 07, 2022, about 17.5 hours after the GRB trigger and were on target for 20 minutes. They were performed at an average seeing of 1.2 arcsec and at an airmass close to 1.0.
Inside the enhanced Swift/XRT error circle (Goad et al., GCN 32333), we do not detect an optical/NIR transient in any band down to the following upper limits (AB mags; 3 sigma):
```
g' > 25.2,
r' > 24.9,
i' > 24.2,
J  > 21.7,
H  > 21.0,
K  > 19.9.
```
Combining the GROND optical (g'r'i') and NIR (JHK) bands, no object is detected inside the enhanced XRT error circle either.
Our measurements add to previousely reported results (Gendre et al., GCN 32331; Lipunov et al., GCN 32332; Jiang et al., GCN 32335; de Ugarte-Postigo et al., GCN 32338).
The source at the northern border of the enhanced XRT error circle reported by de Ugarte Postigo et al. (GCN 32338) is clearly detected in our combined gri images. At present we cannot decide whether this is a galaxy or not.
The given limits are derived based on calibrating the optical images against the Pan-STARRS catalog and the JHK data against 2MASS stars. We thank Sam Kim for excellent support and for performing the observations.
GCN Circular #32340
J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), J.P. Osborne (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), B. Sbarufatti (PSU) and A. D'Ai report on behalf of the Swift-XRT team:
We have analysed 6.6 ks of XRT data for GRB 220706A (D'Ai et al. GCN Circ. 32329), from 87 s to 67.9 ks after the BAT trigger. The data comprise 578 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 32330).
The late-time light curve (from T0+4.4 ks) can be modelled with a power-law decay with a decay index of alpha=1.3 (+/-0.4).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.33 (+0.15, -0.14). The best-fitting absorption column is 6.0 (+/-0.8) x 10^21 cm^-2, in excess of the Galactic value of 2.4 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 3.5 x 10^-11 (7.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     6.0 (+/-0.8) x 10^21 cm^-2
Galactic foreground: 2.4 x 10^20 cm^-2
Excess significance: 12.4 sigma
Photon index:	     2.33 (+0.15, -0.14)
```
If the light curve continues to decay with a power-law decay index of 1.3, the count rate at T+24 hours will be 0.016 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.6 x 10^-13 (1.2 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/01114937.
This circular is an official product of the Swift-XRT team.
GCN Circular #32342
R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (College of Marin) report on behalf of a larger collaboration:
We observed the Swift GRB 220706A (D'Ai et al., GCN 32329) field with the Siding Spring Observatory, Australia site, on July 6, from 18:15 to 18:52 (corresponding to 2.10 to 2.72 hours from the GRB trigger time) with the SDSS r and i filters.
We performed a series of 3x300s exposures in i and 2x300 and 1x135 r bands (the last r-band observation was interrupted). We do not detect an optical counterpart within the XRT enhanced error region (Goad et al., GCN 32333) in either band, consistent with other non-detections (Gendre et al., GCN 32331; Lipunov et al., GCN 32332; Jiang et al., GCN 32335; de Ugarte-Postigo et al., GCN 32338; Guelbenzu et al., GCN 32339).
The following upper limits are calculated using the PanSTARRS catalog as reference:
```
r>23.0
i>22.5
```
We also observed with the LCO 1-m Sinistro instrument at the Teide Observatory, on Tenerife, on July 7, from 04:25 to 04:52 UT (corresponding to 12.27 to 12.72 hours from the GRB trigger time) with the SDSS r and i filters.
We performed a series of 3x300s exposures in i and r bands.
The following upper limits are calculated using the PanSTARRS catalog as reference:
```
r>22.4
i>22.4
```
These magnitudes are not corrected for galactic extinction.
R.S. is funded by NSF AST grant #1831682
GCN Circular #32348
M. Stamatikos (OSU), S. D. Barthelmy (GSFC), A. D'Ai (INAF-IASFPA), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC/UMBC), T. Sakamoto (AGU), (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 220706A (trigger #1114937) (D'Ai, et al., GCN Circ. 32329). The BAT ground-calculated position is RA, Dec = 0.577, -16.411 deg which is
```
    RA(J2000)  =  00h 02m 18.5s
    Dec(J2000) = -16d 24' 38.8"
```
with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 73%.
The BAT mask-weighted light curve shows a bright peak starting from T-3 s to T+30 s. The weak emission is evident in the 10-s binned light curve starting from T-80 s to T+70 s. T90 (15-350 keV) is 86.9 +- 18.0 sec (estimated error including systematics).
The time-averaged spectrum from T-71.84 to T+36.15 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.75 +- 0.17. The fluence in the 15-150 keV band is 1.4 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+3.72 sec in the 15-150 keV band is 0.9 +- 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/1114937/BA/
GCN Circular #32351
GRB 220706A: Swift/UVOT Upper Limits
S. J. LaPorte (PSU) and A. D'Ai (INAF-IASFPA) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 220706A 107 s after the BAT trigger (D'Ai et al., GCN Circ. 32329). No optical afterglow consistent with the XRT position (Goad et al. GCN Circ. 32333) 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           107          257          147         >20.5
u_FC               320          570          246         >20.0
white              107         1025          334         >20.5
b                  751          771           19         >18.5
u                  320          570          246         >20.0
w1                 701          720           19         >17.8
m2                 849          869           19         >18.6
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.025 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #32353
W. Iwakiri (Chuo U.), M. Shidatsu (Ehime.U), M. Serino (AGU), K. C. Gendreau, Z. Arzoumanian (NASA/GSFC), T. Enoto, T. Mihara (RIKEN)
We report on initial NICER observations of GRB 220706A (GCN #32329) carried out on 2022 July 7. The observations were carried out in two parts. The first epoch began at 01:36 UT, approximately a half-day after the Swift/BAT trigger (GCN #32329), and ended at 03:34 UT, with ~1.5 ksec of exposure across two successive orbits of the International Space Station (ISS). The lightcurve shows a slow decay: the NICER-measured X-ray flux decreased from 8 x 10-13 to 6 x 10-13 erg/cm2/s in the 0.3-10 keV band. The emission overall was soft, with hardness ratio of 0.1 between the 0.3-2.0 and 2.0-10.0 keV bands. The second epoch was from 17:08 to 22:09 UT (~1 day after the Swift/BAT detection), with 3.4 ksec exposure in total. We found re-brightening of the afterglow: the NICER average flux during the second epoch was 6.5 x 10-12 erg/cm2/s in 0.3-10 keV, with a hardness ratio of 0.6. The result suggests that the spectrum has significantly hardened compared with the first-epoch results, unlike typical GRBs.
NICER will continue to monitor this source. Multi-wavelength followup observations are strongly encouraged.
Note: Because the nature of the source is unknown, this message is cross-posted to ATel and GCN.

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Jochen Greiner, last update: 09-Jul-2022 [Disclaimer]