Gamma-ray Burst 161022A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 02:44:36 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     718655,   Seg_Num: 0
GRB_RA:          128.967d {+08h 35m 52s} (J2000),
                 129.284d {+08h 37m 08s} (current),
                 128.022d {+08h 32m 05s} (1950)
GRB_DEC:         +54.365d {+54d 21' 54"} (J2000),
                 +54.306d {+54d 18' 21"} (current),
                 +54.538d {+54d 32' 18"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       25501 [cnts]    Image_Peak=348 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   335     E_range: 25-100 keV
BKG_INTEN:       181651 [cnts]
BKG_TIME:        9726.95 SOD {02:42:06.95} UT
BKG_DUR:         64 [sec]
GRB_DATE:        17683 TJD;   296 DOY;   16/10/22
GRB_TIME:        9820.14 SOD {02:43:40.14} UT
GRB_PHI:         143.93 [deg]
GRB_THETA:        45.16 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     15.65 [sigma]
IMAGE_SIGNIF:    7.95 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +2  -2  +0  +0  +3  +0 
SUN_POSTN:       207.08d {+13h 48m 20s}  -11.17d {-11d 09' 53"}
SUN_DIST:         92.08 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.50d {+07h 25m 59s}  +17.82d {+17d 49' 27"}
MOON_DIST:        38.97 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      116.38, 34.44 [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 = 23.45,20.41 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(5.0<100sec) coincident with the FERMI_GBM event (trignum=498797029).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 22 Oct 16 02:44:09 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     498797029
GRB_RA:          189.867d {+12h 39m 28s} (J2000),
                 190.055d {+12h 40m 13s} (current),
                 189.304d {+12h 37m 13s} (1950)
GRB_DEC:         +59.050d {+59d 02' 60"} (J2000),
                 +58.958d {+58d 57' 28"} (current),
                 +59.325d {+59d 19' 28"} (1950)
GRB_ERROR:       28.23 [deg radius, statistical plus systematic]
GRB_INTEN:       65 [cnts/sec]
DATA_SIGNIF:     4.80 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17683 TJD;   296 DOY;   16/10/22
GRB_TIME:        9825.92 SOD {02:43:45.92} UT
GRB_PHI:         309.00 [deg]
GRB_THETA:       100.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.78
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,0,0, 0,1,1, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       207.08d {+13h 48m 20s}  -11.17d {-11d 09' 53"}
SUN_DIST:         71.47 [deg]   Sun_angle= 1.1 [hr] (West of Sun)
MOON_POSTN:      111.49d {+07h 25m 58s}  +17.82d {+17d 49' 29"}
MOON_DIST:        68.92 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      125.84, 58.01 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      152.81, 55.28 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn161022114/quicklook/glg_lc_medres34_bn161022114.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 168.42,21.85 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 22 Oct 16 02:44:32 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     498797029
GRB_RA:          181.710d {+12h 06m 50s} (J2000),
                 181.921d {+12h 07m 41s} (current),
                 181.080d {+12h 04m 19s} (1950)
GRB_DEC:         +56.070d {+56d 04' 12"} (J2000),
                 +55.976d {+55d 58' 35"} (current),
                 +56.348d {+56d 20' 54"} (1950)
GRB_ERROR:       16.99 [deg radius, statistical only]
DATA_SIGNIF:     7.30 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        17683 TJD;   296 DOY;   16/10/22
GRB_TIME:        9825.92 SOD {02:43:45.92} UT
GRB_PHI:         314.00 [deg]
GRB_THETA:       102.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:       207.08d {+13h 48m 20s}  -11.17d {-11d 09' 53"}
SUN_DIST:         70.34 [deg]   Sun_angle= 1.7 [hr] (West of Sun)
MOON_POSTN:      111.50d {+07h 25m 59s}  +17.82d {+17d 49' 28"}
MOON_DIST:        64.39 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      135.39, 59.97 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      150.57, 50.16 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2016/bn161022114/quicklook/glg_lc_medres34_bn161022114.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_498797029.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 02:46:03 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.960d {+08h 35m 50s} (J2000)
POINT_DEC:       +54.365d {+54d 21' 54"} (J2000)
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  9953.46 SOD {02:45:53.46} UT,   133.3 [sec] since BAT Trigger Time
COUNTS:          5    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    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:     Sat 22 Oct 16 02:47:26 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     718655,   Seg_Num: 0
GRB_RA:          128.967d {+08h 35m 52s} (J2000),
                 129.284d {+08h 37m 08s} (current),
                 128.022d {+08h 32m 05s} (1950)
GRB_DEC:         +54.365d {+54d 21' 54"} (J2000),
                 +54.306d {+54d 18' 21"} (current),
                 +54.538d {+54d 32' 18"} (1950)
GRB_DATE:        17683 TJD;   296 DOY;   16/10/22
GRB_TIME:        9820.14 SOD {02:43:40.14} UT
TRIGGER_INDEX:   335
GRB_PHI:         143.93 [deg]
GRB_THETA:        45.16 [deg]
DELTA_TIME:      -38.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.65 [sigma]
IMAGE_SIGNIF:    7.95 [sigma]
LC_URL:          sw00718655000msb.lc
SUN_POSTN:       207.09d {+13h 48m 21s}  -11.17d {-11d 09' 56"}
SUN_DIST:         92.08 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.53d {+07h 26m 06s}  +17.82d {+17d 49' 18"}
MOON_DIST:        38.96 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      116.38, 34.44 [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 = 23.45,20.41 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 02:49:53 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     718655,   Seg_Num: 0
GRB_RA:          129.0009d {+08h 36m 00.21s} (J2000),
                 129.3173d {+08h 37m 16.14s} (current),
                 128.0558d {+08h 32m 13.38s} (1950)
GRB_DEC:         +54.3484d {+54d 20' 54.2"} (J2000),
                 +54.2893d {+54d 17' 21.5"} (current),
                 +54.5218d {+54d 31' 18.5"} (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:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  9960.00 SOD {02:46:00.00} UT,   139.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       207.09d {+13h 48m 21s}  -11.17d {-11d 09' 58"}
SUN_DIST:         92.06 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.55d {+07h 26m 12s}  +17.82d {+17d 49' 11"}
MOON_DIST:        38.95 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      163.74, 36.80 [deg] galactic lon,lat of the burst
ECL_COORDS:      116.40, 34.43 [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 Circular #20087
M. Stamatikos (OSU/NASA/GSFC), S. D. Barthelmy (GSFC), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and T. N. Ukwatta (LANL) report on behalf of the Swift Team:
At 02:43:40 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 161022A (trigger=718655). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 128.967, +54.365 which is
```
   RA(J2000)  =  08h 35m 52s
   Dec(J2000) = +54d 21' 54"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 20 sec. The peak count rate was ~1200 counts/sec (15-350 keV), at ~2 sec after the trigger.
The XRT began observing the field at 02:45:53.4 UT, 133.3 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 129.00074, 54.34876 which is equivalent to:
```
   RA(J2000)  = 08h 36m 00.18s
   Dec(J2000) = +54d 20' 55.5"
```
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 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 (4.13 x 10^20 cm^-2, Willingale et al. 2013), with an excess column of 1.2 (+1.30/-1.19) x 10^21 cm^-2 (90% confidence).
No UVOT data are available at this time.
Burst Advocate for this burst is M. Stamatikos (Michael.Stamatikos-1 AT 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:10:19 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
POINT_ROLL:      106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  9957.99 SOD {02:45:57.99} UT,   137.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.748
N_STARS:         37
X_OFFSET:        481 [pixels]
Y_OFFSET:        534 [pixels]
X_MAX:           1440 [pixels]
Y_MAX:           1493 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00718655000msufc0137.fits
SUN_POSTN:       207.10d {+13h 48m 24s}  -11.17d {-11d 10' 16"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.75d {+07h 27m 01s}  +17.80d {+17d 48' 05"}
MOON_DIST:        38.92 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:10:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
POINT_ROLL:      106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  9957.99 SOD {02:45:57.99} UT,   137.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.748
N_STARS:         37
X_OFFSET:        481 [pixels]
Y_OFFSET:        534 [pixels]
X_MAX:           1440 [pixels]
Y_MAX:           1493 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00718655000msufc0137.fits
SUN_POSTN:       207.10d {+13h 48m 24s}  -11.17d {-11d 10' 16"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.76d {+07h 27m 02s}  +17.80d {+17d 48' 04"}
MOON_DIST:        38.92 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:11:20 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
ROLL:            106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  9957.99 SOD {02:45:57.99} UT,   137.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     498797175
X_OFFSET:        800 [pixels]
Y_OFFSET:        853 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       960
Y_GRB_POS:       1013
BINNING_INDEX:   1
IM_URL:          sw00718655000msuni0155.fits
SUN_POSTN:       207.10d {+13h 48m 25s}  -11.17d {-11d 10' 17"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.76d {+07h 27m 03s}  +17.80d {+17d 48' 02"}
MOON_DIST:        38.92 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:11:35 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
ROLL:            106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  9957.99 SOD {02:45:57.99} UT,   137.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     498797175
X_OFFSET:        800 [pixels]
Y_OFFSET:        853 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       960
Y_GRB_POS:       1013
BINNING_INDEX:   1
IM_URL:          sw00718655000msuni0155.fits
SUN_POSTN:       207.10d {+13h 48m 25s}  -11.17d {-11d 10' 17"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.77d {+07h 27m 04s}  +17.80d {+17d 48' 01"}
MOON_DIST:        38.92 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [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:     Sat 22 Oct 16 03:16:20 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.363d {+54d 21' 48"} (J2000)
POINT_ROLL:      106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10116.23 SOD {02:48:36.23} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.560
N_STARS:         56
X_OFFSET:        241 [pixels]
Y_OFFSET:        294 [pixels]
X_MAX:           1680 [pixels]
Y_MAX:           1733 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00718655000msufc0296.fits
SUN_POSTN:       207.11d {+13h 48m 25s}  -11.17d {-11d 10' 21"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.81d {+07h 27m 15s}  +17.80d {+17d 47' 46"}
MOON_DIST:        38.91 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:16:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.363d {+54d 21' 48"} (J2000)
POINT_ROLL:      106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10116.23 SOD {02:48:36.23} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.560
N_STARS:         56
X_OFFSET:        241 [pixels]
Y_OFFSET:        294 [pixels]
X_MAX:           1680 [pixels]
Y_MAX:           1733 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00718655000msufc0296.fits
SUN_POSTN:       207.11d {+13h 48m 25s}  -11.17d {-11d 10' 22"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.82d {+07h 27m 16s}  +17.80d {+17d 47' 45"}
MOON_DIST:        38.91 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:16:53 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     718655,   Seg_Num: 0
GRB_RA:          129.0018d {+08h 36m 00.43s} (J2000),
                 129.3182d {+08h 37m 16.36s} (current),
                 128.0567d {+08h 32m 13.60s} (1950)
GRB_DEC:         +54.3489d {+54d 20' 56.0"} (J2000),
                 +54.2898d {+54d 17' 23.3"} (current),
                 +54.5223d {+54d 31' 20.3"} (1950)
GRB_ERROR:       2.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  9960.00 SOD {02:46:00.00} UT,   139.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       207.11d {+13h 48m 25s}  -11.17d {-11d 10' 22"}
SUN_DIST:         92.08 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.82d {+07h 27m 16s}  +17.80d {+17d 47' 44"}
MOON_DIST:        38.90 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.74, 36.80 [deg] galactic lon,lat of the burst
ECL_COORDS:      116.40, 34.43 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:17:27 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.363d {+54d 21' 48"} (J2000)
ROLL:            106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10116.23 SOD {02:48:36.23} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     498797333
X_OFFSET:        800 [pixels]
Y_OFFSET:        853 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       960
Y_GRB_POS:       1013
BINNING_INDEX:   1
IM_URL:          sw00718655000msuni0314.fits
SUN_POSTN:       207.11d {+13h 48m 26s}  -11.17d {-11d 10' 22"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.82d {+07h 27m 18s}  +17.80d {+17d 47' 42"}
MOON_DIST:        38.91 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:17:45 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.363d {+54d 21' 48"} (J2000)
ROLL:            106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10116.23 SOD {02:48:36.23} UT,   296.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     498797333
X_OFFSET:        800 [pixels]
Y_OFFSET:        853 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       960
Y_GRB_POS:       1013
BINNING_INDEX:   1
IM_URL:          sw00718655000msuni0314.fits
SUN_POSTN:       207.11d {+13h 48m 26s}  -11.17d {-11d 10' 23"}
SUN_DIST:         92.10 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.83d {+07h 27m 19s}  +17.79d {+17d 47' 42"}
MOON_DIST:        38.91 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [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 #20088
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 161022A, we find an enhanced XRT position of the afterglow: RA, Dec: 129.0018, 54.3490 which is equivalent to:
```
   RA (J2000)  = 08 36 00.44
   Dec (J2000) = +54 20 56.3
```
with an uncertainty of 2.0 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/718655.
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:     Sat 22 Oct 16 03:24:09 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
POINT_ROLL:      106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10695.17 SOD {02:58:15.17} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.052
N_STARS:         93
X_OFFSET:        241 [pixels]
Y_OFFSET:        294 [pixels]
X_MAX:           1680 [pixels]
Y_MAX:           1733 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00718655000msufc0875.fits
SUN_POSTN:       207.11d {+13h 48m 27s}  -11.17d {-11d 10' 28"}
SUN_DIST:         92.11 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.89d {+07h 27m 34s}  +17.79d {+17d 47' 21"}
MOON_DIST:        38.89 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.  
COMMENTS:        The Pointing RA,Dec,Roll values came from the 1st SrcList Notice.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:24:29 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
POINT_ROLL:      106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10695.17 SOD {02:58:15.17} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.052
N_STARS:         93
X_OFFSET:        241 [pixels]
Y_OFFSET:        294 [pixels]
X_MAX:           1680 [pixels]
Y_MAX:           1733 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00718655000msufc0875.fits
SUN_POSTN:       207.11d {+13h 48m 27s}  -11.17d {-11d 10' 29"}
SUN_DIST:         92.11 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.89d {+07h 27m 35s}  +17.79d {+17d 47' 20"}
MOON_DIST:        38.89 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:26:07 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
ROLL:            106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10695.17 SOD {02:58:15.17} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     498797912
X_OFFSET:        800 [pixels]
Y_OFFSET:        853 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       960
Y_GRB_POS:       1013
BINNING_INDEX:   1
IM_URL:          sw00718655000msuni0893.fits
SUN_POSTN:       207.11d {+13h 48m 27s}  -11.18d {-11d 10' 30"}
SUN_DIST:         92.11 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.91d {+07h 27m 39s}  +17.79d {+17d 47' 15"}
MOON_DIST:        38.89 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The Pointing RA,Dec,Roll values came from the 1st Image Notice.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 22 Oct 16 03:26:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     718655,   Seg_Num: 0
POINT_RA:        128.963d {+08h 35m 51s} (J2000)
POINT_DEC:       +54.364d {+54d 21' 49"} (J2000)
ROLL:            106.076d
IMG_START_DATE:  17683 TJD;   296 DOY;   16/10/22
IMG_START_TIME:  10695.17 SOD {02:58:15.17} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     498797912
X_OFFSET:        800 [pixels]
Y_OFFSET:        853 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       960
Y_GRB_POS:       1013
BINNING_INDEX:   1
IM_URL:          sw00718655000msuni0893.fits
SUN_POSTN:       207.11d {+13h 48m 27s}  -11.18d {-11d 10' 30"}
SUN_DIST:         92.11 [deg]   Sun_angle= 5.2 [hr] (West of Sun)
MOON_POSTN:      111.91d {+07h 27m 39s}  +17.79d {+17d 47' 14"}
MOON_DIST:        38.89 [deg]
MOON_ILLUM:      57 [%]
GAL_COORDS:      163.72, 36.78 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      116.37, 34.43 [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 #20089
Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP), Boer, M., Laugier, R. (CNRS-ARTEMIS), Gendre B. (UVI - Etelman Obs.) report:
We imaged the field of GRB 161022A detected by SWIFT (trigger 718655) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France.
The observations started 71s after the GRB trigger (17s after the notice). The elevation of the field increased from 56 degrees above horizon and weather conditions were excellents.
The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). We do not detect any OT with a limiting magnitude of: t0+71.2s to t0+131.2s : Rlim = 17.4
The second image is 30.0s exposure in tracking mode: t0+146.3s to t0+176.3s : Rlim = 18.5
We co-added a series of exposures: t0+146.3s to t0+442.9s : Rlim = 19.0
No more OT detection until t0+6800s at Rlim = 19.0.
Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.
GCN Circular #20090
C. Guidorzi (U. Ferrara), C.G. Mundell (U. Bath), S. Kobayashi, I.A. Steele (LJMU), A. Gomboc (U. Nova Gorica) on behalf of a large collaboration report:
The 2-m Liverpool Telescope began observing Swift GRB161022A (Stamatikos et al., GCN 20087) with the RINGO3 polarimeter on October 22, 02:46:59 UT (199 s since trigger). Within the prompt enhanced XRT error circle (Evans et al. GCN 20088) we found nothing brighter than 20.5 mag in the SDSS-R filter at a mid time of 35 minutes post burst.
GCN Circular #20092
V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), B. Mingo (U. Leicester), A. Melandri (INAF-OAB) and M. Stamatikos report on behalf of the Swift-XRT team:
We have analysed 8.7 ks of XRT data for GRB 161022A (Stamatikos et al. GCN Circ. 20087), from 118 s to 22.5 ks after the BAT trigger. The data comprise 7 s in Windowed Timing (WT) mode (taken while Swift was slewing), with the remainder in Photon Counting (PC) mode. The best available XRT position (using the promptly downlinked event data, the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue) is RA, Dec = 129.0017, 54.3486 which is equivalent to:
```
RA (J2000): 08 36 00.40
Dec(J2000): +54 20 55.0
```
with an uncertainty of 2.0 arcsec (radius, 90% confidence).
The light curve can be modelled with a power-law decay with a decay index of alpha=1.46 (+0.13, -0.11).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.70 (+0.16, -0.07). The best-fitting absorption column is consistent with the Galactic value of 4.1 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 3.8 x 10^-11 (4.0 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     4.1 (+/-2.0) x 10^20 cm^-2
Galactic foreground: 4.1 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.70 (+0.16, -0.07)
```
If the light curve continues to decay with a power-law decay index of 1.46, the count rate at T+24 hours will be 1.5 x 10^-4 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 5.6 x 10^-15 (5.9 x 10^-15) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00718655.
This circular is an official product of the Swift-XRT team.
GCN Circular #20094
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 1530 s of XRT Photon Counting mode data and 2 UVOT images for GRB 161022A, 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 = 129.00148, +54.34828 which is equivalent to:
```
RA (J2000): 08h 36m 0.35s
Dec (J2000): +54d 20' 53.8"
```
with an uncertainty of 1.4 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 #20095
D. Malesani (DARK/NBI and DTU Space) and J. Prieto-Arranz (IAC) report on behalf of a larger collaboration:
We observed the field of GRB 161022A (Stamatikos et al., GCN 20087) using the Nordic Optical Telescope (NOT) equipped with the AlFOSC imaging camera. Observations started on 2016 Oct 22.161 UT, 68.5 min after the GRB, and consisted of 2x300 s exposures in the SDSS r band. Observations were affected by adverse weather conditions.
Within or in the proximity of the XRT error circle (Evans, GCN 20088), at a mid time of 73.9 min after the GRB trigger, we detect no new sources down to a limiting magnitude r > 22 (AB), calibrated against nearby SDSS stars.
GCN Circular #20096
O.J. Roberts (UCD) reports on behalf of the Fermi GBM Team:
At 02:43:45.92 UT on October 22nd, 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 161022A (trigger 498797029/161022114), which was also detected by Swift (Stamatikos et al., GCN 20087). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 131 degrees.
The GBM light curve shows a weak, FRED-like peak with a duration (T90) of about 19 s (50-300 keV). The time-averaged spectrum from T0-6.1 s to T0+11.3 s is adequately fit by a power law function with an exponential high-energy cutoff. The power law index is -0.59 +/- 0.37 and the cutoff energy, parameterized as Epeak, is 155.7 +/- 33.2 keV
The event fluence (10-1000 keV) in this time interval is (1.65 +/- 0.24)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0-1.3 s in the 10-1000keV band is 2.5 +/- 0.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog.
GCN Circular #20097
L. M. Z. Hagen (PSU) and M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 161022A 137 s after the BAT trigger (Stamatikos et al., GCN Circ. 20087). No optical afterglow consistent with the XRT position (Evans et al. GCN Circ. 20094) 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 early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white              137         1544          539         >21.25
u                  296         1668          333         >19.90
b                  551         1692           99         >19.27
v                  627         1421           97         >18.34
uvw1               676         1644          116         >18.86
uvm2               824         1272           38         >17.99
uvw2               602         1570          116         >19.10
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #20098
Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
We observed the field of GRB 161022A (Stamatikos et al., GCN Circ. 20087) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional on Sierra San Pedro M=E1rtir from 2016/10 22.37 to 2016/10 22.53 UTC (6.23 to 9.89 hours after the BAT trigger), obtaining a total of 2.49 hours exposure in the r and i bands and 1.04 hours exposure in the Z, Y, J, and H bands.
For a source within the Swift-XRT error circle (D'Elia et al., GCN Circ. 20092), in comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following 3-sigma upper limits:
```
  r	> 24.24
  i	> 24.04
  Z	> 22.96
  Y	> 22.50
  J	> 22.18
  H	> 21.87
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #20100
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+737 sec from recent telemetry downlinks, we report further analysis of BAT GRB 161022A (trigger #718655) (Stamatikos, et al., GCN Circ. 20087). The BAT ground-calculated position is RA, Dec = 128.988, 54.366 deg, which is
```
   RA(J2000)  =  08h 35m 57.2s 
   Dec(J2000) = +54d 21' 57.8" 
```
with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 14%.
The mask-weighted light curve shows a few overlapping peaks starting at ~T-1 sec, peaking at ~T+2 sec, an ending at ~T+15 sec. T90 (15-350 keV) is 7.3 +- 1.0 sec (estimated error including systematics).
The time-averaged spectrum from T+0.53 to T+8.24 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.14 +- 0.21. The fluence in the 15-150 keV band is 7.5 +- 1.0 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+2.13 sec in the 15-150 keV band is 1.6 +- 0.4 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/718655/BA/
GCN Circular #20143
K. P. Mooley (Hintze Fellow, Oxford), T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), D. Titterington, S. H. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester)
The AMI Large Array robotically triggered on the Swift alert for GRB 161022A (Stamatikos et al., GCN 20087) as part of the 4pisky program, and subsequent follow up observations were obtained up to 10 days post-burst. Our observations at 15 GHz on 2016 Oct 22.15, Oct 23.26, Oct 26.22 and Oct 29.31 (UT) do not reveal any radio source at the XRT location (Evans et al., GCN 20094), with 3sigma upper limits of 135 uJy, 93 uJy, 105 uJy and 105 uJy respectively.
We thank the AMI staff for scheduling these observations. The AMI-GRB database is a log of all GRB follow up observations with the AMI, and is available at http://4pisky.org/ami-grb/.

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Jochen Greiner, last update: 07-Nov-2016 [Disclaimer]