Gamma-ray Burst 161214B

(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 14 Dec 16 17:20:29 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     726885,   Seg_Num: 0
GRB_RA:            3.850d {+00h 15m 24s} (J2000),
                   4.069d {+00h 16m 16s} (current),
                   3.208d {+00h 12m 50s} (1950)
GRB_DEC:          +7.342d {+07d 20' 31"} (J2000),
                  +7.436d {+07d 26' 10"} (current),
                  +7.064d {+07d 03' 50"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3891 [cnts]    Image_Peak=276 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       21860 [cnts]
BKG_TIME:        62398.69 SOD {17:19:58.69} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17736 TJD;   349 DOY;   16/12/14
GRB_TIME:        62410.66 SOD {17:20:10.66} UT
GRB_PHI:         -129.79 [deg]
GRB_THETA:        26.89 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.41 [sigma]
IMAGE_SIGNIF:    11.45 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  +1  +0  +0 +22  +0 
SUN_POSTN:       262.55d {+17h 30m 12s}  -23.26d {-23d 15' 34"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.33d {+06h 13m 18s}  +18.95d {+18d 57' 13"}
MOON_DIST:        86.89 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.44,-54.44 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        6.45,  5.21 [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 = 43.38,14.36 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:21:56 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     726885,   Seg_Num: 0
GRB_RA:            3.8507d {+00h 15m 24.16s} (J2000),
                   4.0688d {+00h 16m 16.50s} (current),
                   3.2080d {+00h 12m 49.92s} (1950)
GRB_DEC:          +7.3534d {+07d 21' 12.2"} (J2000),
                  +7.4476d {+07d 26' 51.2"} (current),
                  +7.0755d {+07d 04' 31.8"} (1950)
GRB_ERROR:       5.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.29e-09 [erg/cm2/sec]
GRB_SIGNIF:      8.00 [sigma]
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62485.59 SOD {17:21:25.59} UT,   74.9 [sec] since BAT Trigger Time
TAM[0-3]:        327.70 237.21 261.69 243.58
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       262.55d {+17h 30m 13s}  -23.26d {-23d 15' 35"}
SUN_DIST:        103.48 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.34d {+06h 13m 22s}  +18.95d {+18d 57' 13"}
MOON_DIST:        86.90 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.45,-54.43 [deg] galactic lon,lat of the burst
ECL_COORDS:        6.46,  5.22 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.69 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:22:06 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     726885,   Seg_Num: 0
GRB_RA:            3.8507d {+00h 15m 24.1s} (J2000),
                   4.0688d {+00h 16m 16.5s} (current),
                   3.2080d {+00h 12m 49.9s} (1950)
GRB_DEC:          +7.3534d {+07d 21' 12.2"} (J2000),
                  +7.4476d {+07d 26' 51.2"} (current),
                  +7.0755d {+07d 04' 31.8"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       64 [cnts]
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62485.59 SOD {17:21:25.59} UT,   74.9 [sec] since BAT Trigger Time
CENTROID_X:      297.20,  raw= 297  [pixels]
CENTROID_Y:      293.16,  raw= 293  [pixels]
ROLL:            247.76 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -10.93
GRB_POS_XRT_Z:   -19.07
IMAGE_URL:       sw00726885000msxps_rw.img
SUN_POSTN:       262.55d {+17h 30m 13s}  -23.26d {-23d 15' 35"}
SUN_DIST:        103.48 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.34d {+06h 13m 23s}  +18.95d {+18d 57' 13"}
MOON_DIST:        86.91 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.45,-54.43 [deg] galactic lon,lat of the burst
ECL_COORDS:        6.46,  5.22 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:22:13 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     726885,   Seg_Num: 0
GRB_RA:            3.8507d {+00h 15m 24.1s} (J2000),
                   4.0688d {+00h 16m 16.5s} (current),
                   3.2080d {+00h 12m 49.9s} (1950)
GRB_DEC:          +7.3534d {+07d 21' 12.2"} (J2000),
                  +7.4476d {+07d 26' 51.2"} (current),
                  +7.0755d {+07d 04' 31.8"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       64 [cnts]
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62485.59 SOD {17:21:25.59} UT,   74.9 [sec] since BAT Trigger Time
CENTROID_X:      297.20,  raw= 297  [pixels]
CENTROID_Y:      293.16,  raw= 293  [pixels]
ROLL:            247.76 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -10.93
GRB_POS_XRT_Z:   -19.07
IMAGE_URL:       sw00726885000msxps_rw.img
SUN_POSTN:       262.55d {+17h 30m 13s}  -23.26d {-23d 15' 35"}
SUN_DIST:        103.48 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.35d {+06h 13m 23s}  +18.95d {+18d 57' 13"}
MOON_DIST:        86.91 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.45,-54.43 [deg] galactic lon,lat of the burst
ECL_COORDS:        6.46,  5.22 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:24:01 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     726885,   Seg_Num: 0
GRB_RA:            3.850d {+00h 15m 24s} (J2000),
                   4.069d {+00h 16m 16s} (current),
                   3.208d {+00h 12m 50s} (1950)
GRB_DEC:          +7.342d {+07d 20' 31"} (J2000),
                  +7.436d {+07d 26' 10"} (current),
                  +7.064d {+07d 03' 50"} (1950)
GRB_DATE:        17736 TJD;   349 DOY;   16/12/14
GRB_TIME:        62410.66 SOD {17:20:10.66} UT
TRIGGER_INDEX:   137
GRB_PHI:         -129.79 [deg]
GRB_THETA:        26.89 [deg]
DELTA_TIME:      -75.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.41 [sigma]
IMAGE_SIGNIF:    11.45 [sigma]
LC_URL:          sw00726885000msb.lc
SUN_POSTN:       262.55d {+17h 30m 13s}  -23.26d {-23d 15' 35"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.36d {+06h 13m 28s}  +18.95d {+18d 57' 14"}
MOON_DIST:        86.93 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.44,-54.44 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        6.45,  5.21 [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 = 43.38,14.36 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:28:39 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     726885,   Seg_Num: 0
GRB_RA:            3.850d {+00h 15m 24s} (J2000),
                   4.069d {+00h 16m 16s} (current),
                   3.208d {+00h 12m 50s} (1950)
GRB_DEC:          +7.342d {+07d 20' 31"} (J2000),
                  +7.436d {+07d 26' 10"} (current),
                  +7.064d {+07d 03' 50"} (1950)
GRB_DATE:        17736 TJD;   349 DOY;   16/12/14
GRB_TIME:        62410.66 SOD {17:20:10.66} UT
TRIGGER_INDEX:   137
GRB_PHI:         -129.79 [deg]
GRB_THETA:        26.89 [deg]
DELTA_TIME:      -75.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     19.41 [sigma]
IMAGE_SIGNIF:    11.45 [sigma]
LC_URL:          sw00726885000msb.lc
SUN_POSTN:       262.56d {+17h 30m 14s}  -23.26d {-23d 15' 35"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.42d {+06h 13m 40s}  +18.95d {+18d 57' 17"}
MOON_DIST:        86.98 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.44,-54.44 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        6.45,  5.21 [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 = 43.38,14.36 [deg].  
COMMENTS:        The 3rd packet (of 3) was missing in the lightcurve data stream.

GCN Circular #20257
P. D'Avanzo (INAF-OAB), D. N. Burrows (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/NSF/USRA), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (GSFC/UMBC), A. Melandri (INAF-OAB), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 17:20:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 161214B (trigger=726885). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 3.850, +7.342 which is
```
   RA(J2000) = 00h 15m 24s
   Dec(J2000) = +07d 20' 31"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single FRED-shaped structure with a duration of about 20 sec. The peak count rate was ~2900 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 17:21:25.5 UT, 74.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 3.85151, 7.35291 which is equivalent to:
```
   RA(J2000)  = 00h 15m 24.36s
   Dec(J2000) = +07d 21' 10.5"
```
with an uncertainty of 4.2 arcseconds (radius, 90% containment). This location is 39 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 1.29e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT data are unavailable at this time.
Burst Advocate for this burst is P. D'Avanzo (paolo.davanzo AT brera.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/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:33:21 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.355d {+07d 21' 17"} (J2000)
POINT_ROLL:      247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62706.06 SOD {17:25:06.06} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.842
N_STARS:         15
X_OFFSET:        526 [pixels]
Y_OFFSET:        541 [pixels]
X_MAX:           1485 [pixels]
Y_MAX:           1500 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00726885000msufc0295.fits
SUN_POSTN:       262.56d {+17h 30m 15s}  -23.26d {-23d 15' 36"}
SUN_DIST:        103.48 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.47d {+06h 13m 52s}  +18.96d {+18d 57' 19"}
MOON_DIST:        87.01 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:33:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.355d {+07d 21' 17"} (J2000)
POINT_ROLL:      247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62706.06 SOD {17:25:06.06} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.842
N_STARS:         15
X_OFFSET:        526 [pixels]
Y_OFFSET:        541 [pixels]
X_MAX:           1485 [pixels]
Y_MAX:           1500 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00726885000msufc0295.fits
SUN_POSTN:       262.56d {+17h 30m 15s}  -23.26d {-23d 15' 36"}
SUN_DIST:        103.48 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.47d {+06h 13m 53s}  +18.96d {+18d 57' 20"}
MOON_DIST:        87.02 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [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 14 Dec 16 17:33:49 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     726885,   Seg_Num: 0
GRB_RA:            3.8517d {+00h 15m 24.40s} (J2000),
                   4.0698d {+00h 16m 16.74s} (current),
                   3.2090d {+00h 12m 50.16s} (1950)
GRB_DEC:          +7.3528d {+07d 21' 10.0"} (J2000),
                  +7.4470d {+07d 26' 49.0"} (current),
                  +7.0749d {+07d 04' 29.7"} (1950)
GRB_ERROR:       3.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62589.00 SOD {17:23:09.00} UT,   178.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       262.56d {+17h 30m 15s}  -23.26d {-23d 15' 36"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.47d {+06h 13m 53s}  +18.96d {+18d 57' 20"}
MOON_DIST:        87.03 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.45,-54.43 [deg] galactic lon,lat of the burst
ECL_COORDS:        6.46,  5.22 [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 14 Dec 16 17:34:46 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.355d {+07d 21' 17"} (J2000)
ROLL:            247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62706.06 SOD {17:25:06.06} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     503429123
X_OFFSET:        846 [pixels]
Y_OFFSET:        861 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1006
Y_GRB_POS:       1021
BINNING_INDEX:   1
IM_URL:          sw00726885000msuni0313.fits
SUN_POSTN:       262.56d {+17h 30m 15s}  -23.26d {-23d 15' 36"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.48d {+06h 13m 56s}  +18.96d {+18d 57' 20"}
MOON_DIST:        87.03 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [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).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:35:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.355d {+07d 21' 17"} (J2000)
ROLL:            247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  62706.06 SOD {17:25:06.06} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     503429123
X_OFFSET:        846 [pixels]
Y_OFFSET:        861 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1006
Y_GRB_POS:       1021
BINNING_INDEX:   1
IM_URL:          sw00726885000msuni0313.fits
SUN_POSTN:       262.56d {+17h 30m 15s}  -23.26d {-23d 15' 36"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.49d {+06h 13m 57s}  +18.96d {+18d 57' 20"}
MOON_DIST:        87.03 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [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:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:40:25 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.354d {+07d 21' 16"} (J2000)
POINT_ROLL:      247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  63283.39 SOD {17:34:43.39} UT,   872.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.606
N_STARS:         44
X_OFFSET:        286 [pixels]
Y_OFFSET:        301 [pixels]
X_MAX:           1725 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00726885000msufc0872.fits
SUN_POSTN:       262.57d {+17h 30m 16s}  -23.26d {-23d 15' 37"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.54d {+06h 14m 10s}  +18.96d {+18d 57' 23"}
MOON_DIST:        87.09 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 14 Dec 16 17:40:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.354d {+07d 21' 16"} (J2000)
POINT_ROLL:      247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  63283.39 SOD {17:34:43.39} UT,   872.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.606
N_STARS:         44
X_OFFSET:        286 [pixels]
Y_OFFSET:        301 [pixels]
X_MAX:           1725 [pixels]
Y_MAX:           1740 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00726885000msufc0872.fits
SUN_POSTN:       262.57d {+17h 30m 16s}  -23.26d {-23d 15' 37"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.55d {+06h 14m 12s}  +18.96d {+18d 57' 23"}
MOON_DIST:        87.09 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [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 14 Dec 16 17:41:49 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.354d {+07d 21' 16"} (J2000)
ROLL:            247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  63283.39 SOD {17:34:43.39} UT,   872.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     503429700
X_OFFSET:        845 [pixels]
Y_OFFSET:        860 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1005
Y_GRB_POS:       1020
BINNING_INDEX:   1
IM_URL:          sw00726885000msuni0890.fits
SUN_POSTN:       262.57d {+17h 30m 16s}  -23.26d {-23d 15' 37"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.56d {+06h 14m 14s}  +18.96d {+18d 57' 24"}
MOON_DIST:        87.10 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [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 14 Dec 16 17:42:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     726885,   Seg_Num: 0
POINT_RA:          3.858d {+00h 15m 26s} (J2000)
POINT_DEC:        +7.354d {+07d 21' 16"} (J2000)
ROLL:            247.766d
IMG_START_DATE:  17736 TJD;   349 DOY;   16/12/14
IMG_START_TIME:  63283.39 SOD {17:34:43.39} UT,   872.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     503429700
X_OFFSET:        845 [pixels]
Y_OFFSET:        860 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1005
Y_GRB_POS:       1020
BINNING_INDEX:   1
IM_URL:          sw00726885000msuni0890.fits
SUN_POSTN:       262.57d {+17h 30m 16s}  -23.26d {-23d 15' 37"}
SUN_DIST:        103.47 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:       93.56d {+06h 14m 15s}  +18.96d {+18d 57' 24"}
MOON_DIST:        87.10 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      107.46,-54.43 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        6.47,  5.22 [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 #20259
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using promptly downlinked XRT event data for GRB 161214B, we find an enhanced XRT position of the afterglow: RA, Dec: 3.8510, 7.3522 which is equivalent to:
```
   RA (J2000)  = 00 15 24.23
   Dec (J2000) = +07 21 08.0
```
with an uncertainty of 2.1 arcseconds (radius, 90% confidence). Analysis of the promptly available data is online at http://www.swift.ac.uk/sper/726885.
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 Circular #20260
D. Malesani (DARK/NBI and DTU Space), D. A. Perley (DARK/NBI), D. Xu (NAOC/CAS), N. R. Tanvir (Univ. Leicester), G. Fedorets (NOT and Univ. Helsinki), report on behalf of a larger collaboration:
We observed the field of GRB 161214B (D'Avanzo et al., GCN 20257) with the Nordic Optical Telescope equipped with the AlFOSC camera. Seeing conditions were modest (1.2").
In a 300-s image taken in the SDSS r band (mean time 2016 Dec 14.815 UT, that is 2.2 hr after the GRB), we detect a single object within the updated XRT error circle (Evans, GCN 20259), which is visible in archival images (e.g. from the DSS and SDSS). No other objects are visible within or close to the XRT position (though, the glare of this object affects negatively the search for such objects). As this field is covered from the SDSS, we can compute accurate photometry of this object, r = 18.35 +- 0.02 (AB).
The brightness of this object is 0.76 +- 0.03 mag brighter then its archival value from the SDSS, and it shows hint of extension in our images. One possibility is that the detected source is actually the blending of two very nearby objects, possibly the optical afterglow of GRB 161014B and an unrelated, foreground star. However, given the modest seeing of our images, we cannot exclude a real physical association between the SDSS object and the GRB.
GCN Circular #20261
F. E. Marshall (NASA/GSFC) and P. D'Avanzo (INAF-OAB) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 161214B 295 s after the BAT trigger (D'Avanzo et al., GCN Circ. 20257). A single source is detected within the enhanced XRT error region (Evans, GCN Circ. 20259) in the initial UVOT exposures. The source position is consistent with that of SDSS J001524.26+072108.5 and also with that of an entry in the USNO-B1.0 catalog. Since the two UVOT exposures were taken with different filters, it is not yet possible to report on variability. It is possible that some of the flux is due to an optical afterglow (as suggested for NOT observations by Malesani et al. GCN Circ. 20260). Preliminary detections using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

u_FC               295          545          246         18.4 +/- 0.2
white_FC           872          955           82         18.1 +/- 0.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #20262
Kugel F. (Chante-perdrix observatory) report:
We imaged the field of GRB 161214B detected by SWIFT (trigger 726885) with a 400 mm telescope (F/D=3) located at the Chante-perdrix observatory, France (IAU A77). The CCD camera is an Atik 460EX unfiltered.
We detect the same star as Malesani et al. (GCNC 20260). A first series images show the star 0.7 magnitude brighter than measured in later images:
```
t0 +   8.1 min to t0 +  20.1 min : R = 17.2 +/- 0.3
t0 + 106.6 min to t0 + 128.6 min : R = 17.9 +/- 0.3
t0 + 131.1 min to t0 + 153.1 min : R = 17.9 +/- 0.3
```
Magnitudes were estimated with the nearby USNO-SA stars and are not corrected for galactic dust extinction.
GCN Circular #20263
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 161214B detected by SWIFT (trigger 726885) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France.
The observations started 32.4s after the GRB trigger (17.7s after the notice). The elevation of the field increased from 51 degrees above horizon and weather conditions were good with the moon.
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+32.4s to t0+92.4s : Rlim = 17.3
Later images show the star at the following magnitudes:
```
t0+ 1046 sec to t0+ 1496 sec : 17.6 +/- 0.5
t0+ 1561 sec to t0+ 2371 sec : 17.8 +/- 0.5
t0+ 3681 sec to t0+ 4581 sec : 18.2 +/- 0.7
```
Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction.
GCN Circular #20264
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 3923 s of XRT Photon Counting mode data and 7 UVOT images for GRB 161214B, 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 = 3.85122, +7.35236 which is equivalent to:
```
RA (J2000): 00h 15m 24.29s
Dec (J2000): +07d 21' 08.5"
```
with an uncertainty of 1.5 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 #20265
D.N. Burrows (PSU), T.G.R. Roegiers (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), B. Mingo (U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), L.M. McCauley (PSU) and P. D'Avanzo report on behalf of the Swift-XRT team:
We have analysed 9.1 ks of XRT data for GRB 161214B (D'Avanzo et al. GCN Circ. 20257), from 64 s to 29.6 ks after the BAT trigger. The data comprise 234 s in Windowed Timing (WT) mode (the first 9 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. 20259).
The late-time light curve (from T0+5.1 ks) can be modelled with a power-law decay with a decay index of alpha=.
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.54 (+0.16, -0.15). The best-fitting absorption column is 1.22 (+0.33, -0.30) x 10^21 cm^-2, in excess of the Galactic value of 7.2 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.94 (+0.15, -0.14) and a best-fitting absorption column of 9.3 (+3.9, -2.0) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (4.1 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     9.3 (+3.9, -2.0) x 10^20 cm^-2
Galactic foreground: 7.2 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.94 (+0.15, -0.14)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00726885.
This circular is an official product of the Swift-XRT team.
GCN Circular #20266
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=E1= lez (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 161214B (D'Avanzo et al., GCN Circ. 20257) 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 2016/12 15.08 to 2016/12 15.10 UTC (8.60 to 9.05 hours after the BAT trigger), obtaining a total of 0.26 hours exposure in the r and i bands and 0.15 hours exposure in the Z, Y, J, and H bands.
We detect a source within the Swift-XRT enhanced error circle (Evans, GCN Circ 20259. In comparison with the SDSS DR9 and 2MASS catalogs, we obtain the following magnitudes:
```
  r	18.87 +/- 0.01
  i	18.56 +/- 0.01
  Z	18.34 +/- 0.01
  Y	18.23 +/- 0.03
  J	18.23 +/- 0.03
  H	18.05 +/- 0.04
```
These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB.
The fading from r =3D 18.35 reported at 2.2 hours by Malesani et al. (GCN Circ. 20260) to our observation of r =3D 18.87 at 8.8 hours confirms the behavior reported by Kugel (GCN Circ. 20262). Our image quality is about 1.7 arcsec FWHM, so we are not able to separate this source from the nearly coincident r =3D 19.09 SDSS source J001524.26+072108.5 mentioned by Malesani et al.
We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
GCN Circular #20268
F. E. Marshall (NASA/GSFC) and P. D'Avanzo (INAF-OAB) report on behalf of the Swift/UVOT team:
Continuing Swift/UVOT observations of the field of GRB 161214B (D'Avanzo et al., GCN Circ. 20257) show that the single source consistent with the XRT position (Goad et al. GCN Circ. 20264) reported by Marshall and D'Avanzo (GCN Circ. 20261) brightened to 17.89 mag in white and then subsequently dimmed by more than 1 magnitude. This confirms the detection of the afterglow reported by Kugel (GCN Circ. 20262), Klotz et al. (GCN Circ. 20263), and Watson et al. (GCN Circ. 20266) following the suggestion by Malesani et al. (GCN Circ. 20260). Detection of the afterglow in the w2 filter indicates that the redshift is < 1.5.
Preliminary detections using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are given in the following table. The magnitudes include contributions from both the afterglow and the catalogued star SDSS J001524.26+072108.5.
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag
white               84          234          147         19.3 +/- 0.1
white              748          768           18         17.9 +/- 0.1
white            27988        28895          841         19.5 +/- 0.1
u                  296          546          246         18.4 +/- 0.1
u                17963        18176          208         19.1 +/- 0.2
w2                5119         5319          197         18.8 +/- 0.2
w2               28903        29657          742         20.4 +/- 0.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #20270
H. A. Krimm (NSF/USRA), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), P. D'Avanzo (INAF-OAB), 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-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 161214B (trigger #726885) (D 'Avanzo, et al., GCN Circ. 20257). The BAT ground-calculated position is RA, Dec =3D 3.857, 7.342 deg which is
```
	 RA(J2000) =3D 00h 15m 25.6s=20
	 Dec(J2000) =3D +07d 20' 30.7=E2=80=9D=20
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 64%.=20
The mask-weighted light curve shows a single, FRED-shaped peak, beginning at T-2 sec, peaking at T+0 sec and fading to background by T+30 sec. There is a soft precursor at T-74 sec, which was detected on board at too low significance to trigger. T90 (15-350 keV) is 24.8 +- 3.1 sec (estimated error including systematics).
The time-averaged spectrum from T-0.42 to T+30.75 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.76 +- 0.09. The fluence in the 15-150 keV band is 2.1 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.11 sec in the 15-150 keV band is 2.2 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #20275
E. Mazaeva (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova (IKI), I. Korobtsev (ISTP) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 161214B (D'Avanzoet al., GCN 20257) with AZT-33IK telescope of Sayan observatory (Mondy) starting on December, 15 (UT) 13:22:26. We obtained several images in R-filter. The source previously reported (Malesani et al. GCN 20260; Marshall et al. GCN 20261) is clearly visible. Preliminary photometry of the source is following
```
Date       UT start   t-T0    Filter  Exp.     OT     Err.  UL
                      (mid, days)      (s)

2016-12-15 13:22:26  0.85579  R     120*30    18.69   0.03  21.9
```
The photometry includes a catalogued star SDSS J001524.26+072108.5 already mentioned by Malesani et al. (GCN 20260) and Marshall et al. (GCN 20268). The R magnitude of the star obtained by Lupton transformations is 18.83 +/- 0.03.
Photometry is based on nearby SDSS-DR9 stars
```
SDSS-DR9_id            R(Lupton)
J001520.09+072300.5    17.01
J001517.29+072310.4    17.05
J001513.07+071914.3    17.28
J001511.86+071859.3    16.07
J001513.35+071841.1    15.26
J001525.83+072141.2    14.31
J001524.40+072156.0    17.79
J001530.21+072230.9    16.94
```
GCN Circular #20279
E. Mazaeva (IKI), R. Inasaridze (AbAO), A. Mokhnatkin (KIAM), A. Pozanenko (IKI), A. Volnova (IKI), V. Ayvazian (AbAO), V. Zhuzhunadze, (AbAO), O.Kvaratskhelia (AbAO), G. Inasaridze (AbAO), I. Molotov (KIAM) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 161214B (D'Avanzoet al., GCN 20257) with AS-32 (0.7m) telescope of Abastumani Observatory and with K-800 (0.8m) telescope of ISON/Terskol observatory on December, 15. We obtained several unfiltered images in each observatory. The source previously reported (Malesani et al. GCN 20260; Marshall et al. GCN 20261) is clearly visible. Preliminary photometry of the source is following
```
Date       UT start   t-T0    Filter  Exp.     OT     Err.  UL
                      (mid, days)      (s)

2016-12-15 15:31:49  0.97738   CR     85*60   18.79   0.05  22.2  AS-32
2016-12-15 18:07:05  1.06047   CR    142*30  18.76   0.13  21.4  K-800
```
Photometry is based on R-magnitudes the same stars used in (Mazaeva et al., GCN 20275)
GCN Circular #20319
D. Malesani (DARK/NBI and DTU Space), J. P. U. Fynbo (DARK/NBI), B. Milvang-Jensen (DARK/NBI), N. R. Tanvir (Univ. Leicester), M. I. Andersen (DARK/NBI), H. Korhonen (DARK/NBI), D. A. Perley (DARK/NBI), T. Kruehler (MPE), D. Xu (NAOC/CAS), G. Fedorets (NOT and Univ. Helsinki), report on behalf of a larger collaboration:
We report on further analysis of our data (Malesani et al., GCN 20260) taken at the Nordic Optical Telescope for GRB 161214B (D'Avanzo et al., GCN 20257). The best-seeing images (~0.9") clearly reveal two blended objects within the XRT error circle, separated by <1 arcsec, with comparable brightness (at ~2.2 hr after the GRB). As first suggested in GCN 20260, the likely interpretation is the near-superposition of the afterglow of GRB 161214B and an unrelated, foreground object. Astrometric registration of our images with the SDSS frames shows that the afterglow is slightly south of the SDSS source.
A spectrum of the complex was secured using the AlFOSC spectrograph, covering both objects. Observations started on 2016 Dec 14.82 UT (2.42 hr after the GRB) and consisted of 2x20 min exposures using grism #4, covering the wavelength range 3500-9400 AA. A few absorption lines are apparent, and there is a hint that their spatial extent on the trace is offset to the North (consistent with the SDSS source location). The two most prominent features can be identified as the Mg I b triplet and the Na I D doublet at redshift ~0, confirming that the SDSS object is a Galactic star (probably of K or early M type). One more feature is observed at ~4238 AA, whose identification is unclear. One possibility is the Ca I 4226 A resonant line at z = 0, sometimes observed in K stars, which would however require an offset of the wavelength calibration in the blue part of our spectrum.
No features which can be clearly attributed to the afterglow are detected in our spectrum. Marshall & D'Avanzo (GCN 20268) report detection of the afterglow in the UVOT UVW2 filter, at a flux level much brighter than the SDSS object (u ~ 22.5). This allows to set an upper limit to the redshift z <~ 1.2 from the absence of the Lyman limit dropout.
GCN Circular #20345
D.Vlasenko, V. Lipunov, E.Gorbovskoy, N.Tyurina, V.Kornilov, O.Gress, P.Balanutsa, A.Kuznetsov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute
R. Rebolo, M. Serra Ricart, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias
R.Podesta, C.Lopez, F.Podesta Observatorio Astronomico Felix Aguilar (OAFA), San Juan Univerdity,
H. Levato, C. Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
D.Buckley, S. Potter, South African Astronomical Observatory
O.Gres, K.Ivanov, J.Rabinovich, N.M.Budnev, Irkutsk State University
A. Tlatov, V.Senik, D. Dormidontov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory
V.Yurkov, Yu.Sergienko, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the GRB161214B 882 sec after notice time and 900.34 sec after trigger time at 2016-12-14 17:35:11 UT. On our first (180s exposure) set we haven`t found optical transient within Swift error-box (ra=00 16 16 dec=+07 26 10 r=3.00) (D'Avanzo et al., GCN 20257). The 5-sigma upper limit set is about 16.5 mag(polaroid, unfiltered).
The observations made on zenit distance = 49 degrees, galaxy latitude b = -54 degree. The moon (98 % bright part) is 29.5 degrees above the horizon. The distance between moon and object is 87 The sun altitude is -40 degree. The object can be observed till 2016-12-14 22:27:18
Maximal coadded limit ~18.7 m. No OT found.
The message may be cited.
GCN Circular #20453
K. P. Mooley, 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 161214B (D'Avanzo et al., GCN 20257) 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 Dec 14.76, Dec 16.76, Dec 18.75 and Dec 21.74 (UT) do not reveal any radio source at the XRT location (Goad et al., GCN 20264), with 3sigma upper limits of 96 uJy, 87 uJy, 85 uJy and 104 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: 13-Jan-2017 [Disclaimer]