Gamma-ray Burst 170629A

(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:     Thu 29 Jun 17 13:09:43 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     759159,   Seg_Num: 0
GRB_RA:          130.016d {+08h 40m 04s} (J2000),
                 130.161d {+08h 40m 39s} (current),
                 129.600d {+08h 38m 24s} (1950)
GRB_DEC:         -46.587d {-46d 35' 11"} (J2000),
                 -46.650d {-46d 38' 57"} (current),
                 -46.409d {-46d 24' 30"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2686 [cnts]    Image_Peak=88 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   148     E_range: 25-100 keV
BKG_INTEN:       18070 [cnts]
BKG_TIME:        46396.70 SOD {12:53:16.70} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17933 TJD;   180 DOY;   17/06/29
GRB_TIME:        46413.15 SOD {12:53:33.15} UT
GRB_PHI:         -129.68 [deg]
GRB_THETA:        43.84 [deg]
SOLN_STATUS:     0x20002003
RATE_SIGNIF:     8.60 [sigma]
IMAGE_SIGNIF:    7.01 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -3  +0  +1 -25  +0 
SUN_POSTN:        98.69d {+06h 34m 46s}  +23.20d {+23d 11' 45"}
SUN_DIST:         75.42 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.15d {+11h 28m 36s}   +5.71d {+05d 42' 20"}
MOON_DIST:        64.19 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.17, -2.98 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      156.30,-61.14 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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:        There is a bright star (mag=3.84) 6.90 arcmin from this position.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 75.19,14.20 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=520433616).

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Thu 29 Jun 17 12:53:55 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     520433616
GRB_RA:          124.700d {+08h 18m 48s} (J2000),
                 124.774d {+08h 19m 06s} (current),
                 124.488d {+08h 17m 57s} (1950)
GRB_DEC:         -61.967d {-61d 58' 00"} (J2000),
                 -62.022d {-62d 01' 19"} (current),
                 -61.809d {-61d 48' 30"} (1950)
GRB_ERROR:       13.32 [deg radius, statistical plus systematic]
GRB_INTEN:       110 [cnts/sec]
DATA_SIGNIF:     7.20 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        17933 TJD;   180 DOY;   17/06/29
GRB_TIME:        46411.63 SOD {12:53:31.63} UT
GRB_PHI:           0.00 [deg]
GRB_THETA:        10.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.50
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      93%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       1,0,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        98.68d {+06h 34m 43s}  +23.20d {+23d 11' 47"}
SUN_DIST:         87.74 [deg]   Sun_angle= -1.7 [hr] (East of Sun)
MOON_POSTN:      172.01d {+11h 28m 03s}   +5.75d {+05d 45' 04"}
MOON_DIST:        76.80 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      276.18,-14.29 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      179.27,-74.48 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170629537/quicklook/glg_lc_medres34_bn170629537.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 51.58,-23.05 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Thu 29 Jun 17 12:54:05 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      57
TRIGGER_NUM:     520433616
GRB_RA:          139.700d {+09h 18m 48s} (J2000),
                 139.831d {+09h 19m 19s} (current),
                 139.325d {+09h 17m 18s} (1950)
GRB_DEC:         -55.900d {-55d 53' 59"} (J2000),
                 -55.974d {-55d 58' 27"} (current),
                 -55.688d {-55d 41' 17"} (1950)
GRB_ERROR:       6.70 [deg radius, statistical plus systematic]
GRB_INTEN:       233 [cnts/sec]
DATA_SIGNIF:     16.30 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        17933 TJD;   180 DOY;   17/06/29
GRB_TIME:        46411.63 SOD {12:53:31.63} UT
GRB_PHI:         320.00 [deg]
GRB_THETA:        15.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      1.34
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      98%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       1,0,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        98.68d {+06h 34m 43s}  +23.20d {+23d 11' 47"}
SUN_DIST:         86.51 [deg]   Sun_angle= -2.7 [hr] (East of Sun)
MOON_POSTN:      172.01d {+11h 28m 03s}   +5.75d {+05d 45' 03"}
MOON_DIST:        67.16 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      276.18, -4.50 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      179.56,-64.69 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170629537/quicklook/glg_lc_medres34_bn170629537.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 51.58,-23.05 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Thu 29 Jun 17 12:54:09 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     520433616
GRB_RA:          129.990d {+08h 39m 58s} (J2000),
                 130.094d {+08h 40m 23s} (current),
                 129.693d {+08h 38m 46s} (1950)
GRB_DEC:         -58.160d {-58d 09' 35"} (J2000),
                 -58.223d {-58d 13' 21"} (current),
                 -57.982d {-57d 58' 53"} (1950)
GRB_ERROR:       4.19 [deg radius, statistical only]
DATA_SIGNIF:     13.50 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        17933 TJD;   180 DOY;   17/06/29
GRB_TIME:        46411.63 SOD {12:53:31.63} UT
GRB_PHI:         342.00 [deg]
GRB_THETA:        13.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:        98.68d {+06h 34m 43s}  +23.20d {+23d 11' 47"}
SUN_DIST:         85.51 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.01d {+11h 28m 04s}   +5.75d {+05d 45' 02"}
MOON_DIST:        72.26 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      274.46, -9.98 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      174.46,-70.09 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170629537/quicklook/glg_lc_medres34_bn170629537.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_520433616.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
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 Circular #21283
A. Cholden-Brown (PSU), A. A. Breeveld (UCL-MSSL), S. W. K Emery (UCL-MSSL), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (GSFC/UMBC), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 12:53:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 170629A (trigger=759159). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 130.016, -46.587 which is
```
   RA(J2000) = 08h 40m 04s
   Dec(J2000) = -46d 35' 11"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve is incomplete at this time due to lost telemetry, but was still rising at 8 sec after the trigger with a count rate of ~1500 counts/sec.
The XRT began observing the field at 12:54:56.0 UT, 82.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 129.98653, -46.57155 which is equivalent to:
```
   RA(J2000)  = 08h 39m 56.77s
   Dec(J2000) = -46d 34' 17.6"
```
with an uncertainty of 4.7 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. We cannot determine whether the source is fading at the present time. No spectrum from the promptly downlinked event data is yet available to determine the column density.
The initial flux in the 2.5 s image was 5.16e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 90 seconds with the UVW2 filter starting 86 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. Analysis is complicated because of a nearby bright star (b Vel). Full results will have to await the full dataset.
Burst Advocate for this burst is A. Cholden-Brown (aaronb AT swift.psu.edu). 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:     Thu 29 Jun 17 13:10:16 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     759159,   Seg_Num: 0
GRB_RA:          129.9872d {+08h 39m 56.92s} (J2000),
                 130.1325d {+08h 40m 31.80s} (current),
                 129.5720d {+08h 38m 17.28s} (1950)
GRB_DEC:         -46.5712d {-46d 34' 16.3"} (J2000),
                 -46.6339d {-46d 38' 01.9"} (current),
                 -46.3931d {-46d 23' 35.0"} (1950)
GRB_ERROR:       6.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       5.16e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.00 [sigma]
IMG_START_DATE:  17933 TJD;   180 DOY;   17/06/29
IMG_START_TIME:  46496.00 SOD {12:54:56.00} UT,   82.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.65 237.19 261.47 243.63
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        98.69d {+06h 34m 46s}  +23.20d {+23d 11' 45"}
SUN_DIST:         75.40 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.15d {+11h 28m 37s}   +5.70d {+05d 42' 14"}
MOON_DIST:        64.19 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.15, -2.99 [deg] galactic lon,lat of the burst
ECL_COORDS:      156.25,-61.14 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.49 arcmin from the BAT position.  
COMMENTS:        There is a bright star (mag=3.84) 8.40 arcmin from the XRT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Jun 17 13:10:26 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     759159,   Seg_Num: 0
GRB_RA:          129.9872d {+08h 39m 56.9s} (J2000),
                 130.1325d {+08h 40m 31.8s} (current),
                 129.5720d {+08h 38m 17.2s} (1950)
GRB_DEC:         -46.5712d {-46d 34' 16.3"} (J2000),
                 -46.6339d {-46d 38' 01.9"} (current),
                 -46.3931d {-46d 23' 35.0"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       25 [cnts]
IMG_START_DATE:  17933 TJD;   180 DOY;   17/06/29
IMG_START_TIME:  46496.00 SOD {12:54:56.00} UT,   82.8 [sec] since BAT Trigger Time
CENTROID_X:      234.89,  raw= 235  [pixels]
CENTROID_Y:      316.05,  raw= 316  [pixels]
ROLL:            330.37 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   41.60
GRB_POS_XRT_Z:   -168.56
IMAGE_URL:       sw00759159000msxps_rw.img
SUN_POSTN:        98.69d {+06h 34m 46s}  +23.20d {+23d 11' 45"}
SUN_DIST:         75.40 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.16d {+11h 28m 38s}   +5.70d {+05d 42' 13"}
MOON_DIST:        64.19 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.15, -2.99 [deg] galactic lon,lat of the burst
ECL_COORDS:      156.25,-61.14 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.  
COMMENTS:        There is a bright star (mag=3.84) 6.90 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Jun 17 13:10:29 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     759159,   Seg_Num: 0
GRB_RA:          129.9872d {+08h 39m 56.9s} (J2000),
                 130.1325d {+08h 40m 31.8s} (current),
                 129.5720d {+08h 38m 17.2s} (1950)
GRB_DEC:         -46.5712d {-46d 34' 16.3"} (J2000),
                 -46.6339d {-46d 38' 01.9"} (current),
                 -46.3931d {-46d 23' 35.0"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       25 [cnts]
IMG_START_DATE:  17933 TJD;   180 DOY;   17/06/29
IMG_START_TIME:  46496.00 SOD {12:54:56.00} UT,   82.8 [sec] since BAT Trigger Time
CENTROID_X:      234.89,  raw= 235  [pixels]
CENTROID_Y:      316.05,  raw= 316  [pixels]
ROLL:            330.37 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   41.60
GRB_POS_XRT_Z:   -168.56
IMAGE_URL:       sw00759159000msxps_rw.img
SUN_POSTN:        98.69d {+06h 34m 46s}  +23.20d {+23d 11' 45"}
SUN_DIST:         75.40 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.16d {+11h 28m 38s}   +5.70d {+05d 42' 12"}
MOON_DIST:        64.19 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.15, -2.99 [deg] galactic lon,lat of the burst
ECL_COORDS:      156.25,-61.14 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.  
COMMENTS:        There is a bright star (mag=3.84) 6.90 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Jun 17 13:11:38 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     759159,   Seg_Num: 0
POINT_RA:        130.035d {+08h 40m 08s} (J2000)
POINT_DEC:       -46.606d {-46d 36' 21"} (J2000)
POINT_ROLL:      330.371d
IMG_START_DATE:  17933 TJD;   180 DOY;   17/06/29
IMG_START_TIME:  46499.82 SOD {12:54:59.82} UT,   86.7 [sec] since BAT Trigger Time
FILTER:          2, UVW2
BKG_MEAN:        0.178
N_STARS:         117
X_OFFSET:        384 [pixels]
Y_OFFSET:        200 [pixels]
X_MAX:           1823 [pixels]
Y_MAX:           1639 [pixels]
DET_THRESH:      5
PHOTO_THRESH:    2
SL_URL:          sw00759159000msufc0086.fits
SUN_POSTN:        98.69d {+06h 34m 46s}  +23.20d {+23d 11' 45"}
SUN_DIST:         75.44 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.17d {+11h 28m 40s}   +5.70d {+05d 42' 00"}
MOON_DIST:        64.20 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.20, -2.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      156.35,-61.15 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.  
COMMENTS:        There is a bright star (mag=3.84) 6.90 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Jun 17 13:11:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     759159,   Seg_Num: 0
POINT_RA:        130.035d {+08h 40m 08s} (J2000)
POINT_DEC:       -46.606d {-46d 36' 21"} (J2000)
POINT_ROLL:      330.371d
IMG_START_DATE:  17933 TJD;   180 DOY;   17/06/29
IMG_START_TIME:  46499.82 SOD {12:54:59.82} UT,   86.7 [sec] since BAT Trigger Time
FILTER:          2, UVW2
BKG_MEAN:        0.178
N_STARS:         117
X_OFFSET:        384 [pixels]
Y_OFFSET:        200 [pixels]
X_MAX:           1823 [pixels]
Y_MAX:           1639 [pixels]
DET_THRESH:      5
PHOTO_THRESH:    2
SL_URL:          sw00759159000msufc0086.fits
SUN_POSTN:        98.69d {+06h 34m 47s}  +23.20d {+23d 11' 45"}
SUN_DIST:         75.44 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.17d {+11h 28m 41s}   +5.70d {+05d 41' 57"}
MOON_DIST:        64.20 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.20, -2.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      156.35,-61.15 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.  
COMMENTS:        There is a bright star (mag=3.84) 6.90 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Jun 17 13:12:48 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     759159,   Seg_Num: 0
GRB_RA:          130.016d {+08h 40m 04s} (J2000),
                 130.161d {+08h 40m 39s} (current),
                 129.600d {+08h 38m 24s} (1950)
GRB_DEC:         -46.587d {-46d 35' 11"} (J2000),
                 -46.650d {-46d 38' 57"} (current),
                 -46.409d {-46d 24' 30"} (1950)
GRB_DATE:        17933 TJD;   180 DOY;   17/06/29
GRB_TIME:        46413.15 SOD {12:53:33.15} UT
TRIGGER_INDEX:   148
GRB_PHI:         -129.68 [deg]
GRB_THETA:        43.84 [deg]
DELTA_TIME:      -43.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x2003
RATE_SIGNIF:     8.60 [sigma]
IMAGE_SIGNIF:    7.01 [sigma]
LC_URL:          sw00759159000msb.lc
SUN_POSTN:        98.69d {+06h 34m 47s}  +23.20d {+23d 11' 44"}
SUN_DIST:         75.42 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.18d {+11h 28m 42s}   +5.70d {+05d 41' 48"}
MOON_DIST:        64.19 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.17, -2.98 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      156.30,-61.14 [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:        There is a bright star (mag=3.84) 6.90 arcmin from this position.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 75.19,14.20 [deg].  
COMMENTS:        The 2nd packet (of 3) was missing in the lightcurve data stream.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Jun 17 13:12:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     759159,   Seg_Num: 0
POINT_RA:        130.035d {+08h 40m 08s} (J2000)
POINT_DEC:       -46.606d {-46d 36' 21"} (J2000)
ROLL:            330.371d
IMG_START_DATE:  17933 TJD;   180 DOY;   17/06/29
IMG_START_TIME:  46499.82 SOD {12:54:59.82} UT,   86.7 [sec] since BAT Trigger Time
FILTER:          2, UVW2
EXPOSURE_ID:     520433719
X_OFFSET:        1058 [pixels]
Y_OFFSET:        622 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1218
Y_GRB_POS:       782
BINNING_INDEX:   1
IM_URL:          sw00759159000msuni0106.fits
SUN_POSTN:        98.69d {+06h 34m 47s}  +23.20d {+23d 11' 44"}
SUN_DIST:         75.44 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.18d {+11h 28m 43s}   +5.70d {+05d 41' 47"}
MOON_DIST:        64.20 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.20, -2.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      156.35,-61.15 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.  
COMMENTS:        There is a bright star (mag=3.84) 6.90 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Jun 17 13:12:43 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     759159,   Seg_Num: 0
POINT_RA:        130.035d {+08h 40m 08s} (J2000)
POINT_DEC:       -46.606d {-46d 36' 21"} (J2000)
ROLL:            330.371d
IMG_START_DATE:  17933 TJD;   180 DOY;   17/06/29
IMG_START_TIME:  46499.82 SOD {12:54:59.82} UT,   86.7 [sec] since BAT Trigger Time
FILTER:          2, UVW2
EXPOSURE_ID:     520433719
X_OFFSET:        1058 [pixels]
Y_OFFSET:        622 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1218
Y_GRB_POS:       782
BINNING_INDEX:   1
IM_URL:          sw00759159000msuni0106.fits
SUN_POSTN:        98.69d {+06h 34m 47s}  +23.20d {+23d 11' 44"}
SUN_DIST:         75.44 [deg]   Sun_angle= -2.1 [hr] (East of Sun)
MOON_POSTN:      172.18d {+11h 28m 42s}   +5.70d {+05d 41' 49"}
MOON_DIST:        64.20 [deg]
MOON_ILLUM:      35 [%]
GAL_COORDS:      265.20, -2.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      156.35,-61.15 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        There is a bright star (mag=3.84) 6.90 arcmin from the BAT position.

GCN Circular #21285
R. Hamburg (UAH), E. Bissaldi (Politecnico & INFN Bari), and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 12:53:31.63 UT on 29 June 2017, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 170629A (trigger 520433616 / 170629537), which was also detected by the Swift/BAT (Cholden-Brown et al. 2017, GCN 21283). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 24 degrees.
The GBM light curve consists of a single emission episode with a duration (T90) of about 28 s (50-300 keV). The time-averaged spectrum from T0-0.00 s to T0+12.29 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.1 +/- 0.1 and the cutoff energy, parameterized as Epeak, is 126 +/- 10 keV.
The event fluence (10-1000 keV) in this time interval is (3.3 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+8.70 s in the 10-1000 keV band is 6.0 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #21286
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 75 s of XRT Photon Counting mode data and 1 UVOT images for GRB 170629A, 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 = 129.98383, -46.57073 which is equivalent to:
```
RA (J2000): 08h 39m 56.12s
Dec (J2000): -46d 34' 14.6"
```
with an uncertainty of 2.8 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #21287
J. R. Cummings (CPI), S. D. Barthelmy (GSFC), A. Cholden-Brown (PSU), H. A. Krimm (NSF/USRA), 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+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 170629A (trigger #759159) (Cholden-Brown et al., GCN Circ. 21283). The BAT ground-calculated position is RA, Dec = 129.963, -46.585 deg which is
```
  RA(J2000)  =  08h 39m 51.0s 
  Dec(J2000) = -46d 35' 06.3" 
```
with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 17%.
The mask-weighted light curve shows a multi-peaked structure that starts at ~ T-1 s and ends at ~T+40 s. There are roughly two overlapping pulses with peaks at ~ T+1 s and ~ T+5 s, respectively. The burst location went out of the FOV at around T+240 s. T90 (15-350 keV) is 34.4 +- 12.7 sec (estimated error including systematics).
The time-averaged spectrum from T-1.21 to T+39.32 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.66 +- 0.12. The fluence in the 15-150 keV band is 2.6 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+4.96 sec in the 15-150 keV band is 4.1 +- 0.6 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/759159/BA/
GCN Circular #21288
A. Cholden-Brown (PSU) reports on behalf of the Swift-XRT team:
We have analysed 2.0 ks of XRT data for GRB 170629A (Cholden-Brown et al. GCN Circ. 21283), from 97 s to 5.9 ks after the BAT trigger. The data comprise 140 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 21286).
The light curve can be modelled with a power-law decay with a decay index of alpha=0.72 (+0.09, -0.12).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.8 (+0.6, -0.3). The best-fitting absorption column is 1.11 (+0.79, -0.20) x 10^22 cm^-2, consistent with the Galactic value of 9.1 x 10^21 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.3 x 10^-11 (8.5 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.11 (+0.79, -0.20) x 10^22 cm^-2
Galactic foreground: 9.1 x 10^21 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.8 (+0.6, -0.3)
```
If the light curve continues to decay with a power-law decay index of 0.72, the count rate at T+24 hours will be 0.014 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.2 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/00759159.
This circular is an official product of the Swift-XRT team.

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Jochen Greiner, last update: 30-Jun-2017 [Disclaimer]