Gamma-ray Burst 160117B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 13:59:43 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     670800,   Seg_Num: 0
  GRB_RA:          132.190d {+08h 48m 46s} (J2000),
                   132.377d {+08h 49m 30s} (current),
                   131.610d {+08h 46m 26s} (1950)
  GRB_DEC:         -16.340d {-16d 20' 23"} (J2000),
                   -16.400d {-16d 24' 00"} (current),
                   -16.154d {-16d 09' 14"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       2714 [cnts]    Image_Peak=142 [image_cnts]
  TRIGGER_DUR:     1.024 [sec] 
  TRIGGER_INDEX:   146     E_range: 25-100 keV
  BKG_INTEN:       16783 [cnts]
  BKG_TIME:        50352.28 SOD {13:59:12.28} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        17404 TJD;    17 DOY;   16/01/17
  GRB_TIME:        50367.64 SOD {13:59:27.64} UT
  GRB_PHI:         124.46 [deg]
  GRB_THETA:        12.32 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.44 [sigma]
  IMAGE_SIGNIF:    7.06 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +0  +2  -3  +0  +0 +77  +0 
  SUN_POSTN:       298.92d {+19h 55m 41s}  -20.78d {-20d 46' 41"}
  SUN_DIST:        140.55 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.69d {+02h 14m 46s}   +9.93d {+09d 56' 05"}
  MOON_DIST:       101.04 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      241.98, 16.86 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      140.02,-32.75 [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 = 134.41,-14.34 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:01:00 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     670800,   Seg_Num: 0
  GRB_RA:          132.1938d {+08h 48m 46.51s} (J2000),
                   132.3799d {+08h 49m 31.18s} (current),
                   131.6138d {+08h 46m 27.30s} (1950)
  GRB_DEC:         -16.3660d {-16d 21' 57.5"} (J2000),
                   -16.4261d {-16d 25' 33.9"} (current),
                   -16.1801d {-16d 10' 48.2"} (1950)
  GRB_ERROR:       4.8 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       4.84e-09 [erg/cm2/sec]
  GRB_SIGNIF:      12.36 [sigma]
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50422.57 SOD {14:00:22.57} UT,   54.9 [sec] since BAT Trigger Time
  TAM[0-3]:        327.67 237.22 261.63 243.62
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:       298.92d {+19h 55m 42s}  -20.78d {-20d 46' 40"}
  SUN_DIST:        140.52 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.70d {+02h 14m 49s}   +9.94d {+09d 56' 17"}
  MOON_DIST:       101.03 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.01, 16.85 [deg] galactic lon,lat of the burst
  ECL_COORDS:      140.03,-32.77 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        The XRT position is 1.57 arcmin from the BAT position.  
  COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
  COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
  COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:01:15 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  GRB_RA:          132.1938d {+08h 48m 46.5s} (J2000),
                   132.3799d {+08h 49m 31.1s} (current),
                   131.6138d {+08h 46m 27.3s} (1950)
  GRB_DEC:         -16.3660d {-16d 21' 57.5"} (J2000),
                   -16.4261d {-16d 25' 33.9"} (current),
                   -16.1801d {-16d 10' 48.2"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       153 [cnts]
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50422.57 SOD {14:00:22.57} UT,   54.9 [sec] since BAT Trigger Time
  CENTROID_X:      288.88,  raw= 289  [pixels]
  CENTROID_Y:      293.04,  raw= 293  [pixels]
  ROLL:            160.22 [deg]
  GAIN:            2
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -11.20
  GRB_POS_XRT_Z:   -38.70
  IMAGE_URL:       sw00670800000msxps_rw.img
  SUN_POSTN:       298.92d {+19h 55m 42s}  -20.78d {-20d 46' 40"}
  SUN_DIST:        140.52 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.71d {+02h 14m 49s}   +9.94d {+09d 56' 20"}
  MOON_DIST:       101.03 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.01, 16.85 [deg] galactic lon,lat of the burst
  ECL_COORDS:      140.03,-32.77 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
  COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
  COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:01:10 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  GRB_RA:          132.1938d {+08h 48m 46.5s} (J2000),
                   132.3799d {+08h 49m 31.1s} (current),
                   131.6138d {+08h 46m 27.3s} (1950)
  GRB_DEC:         -16.3660d {-16d 21' 57.5"} (J2000),
                   -16.4261d {-16d 25' 33.9"} (current),
                   -16.1801d {-16d 10' 48.2"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       153 [cnts]
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50422.57 SOD {14:00:22.57} UT,   54.9 [sec] since BAT Trigger Time
  CENTROID_X:      288.88,  raw= 289  [pixels]
  CENTROID_Y:      293.04,  raw= 293  [pixels]
  ROLL:            160.22 [deg]
  GAIN:            2
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -11.20
  GRB_POS_XRT_Z:   -38.70
  IMAGE_URL:       sw00670800000msxps_rw.img
  SUN_POSTN:       298.92d {+19h 55m 42s}  -20.78d {-20d 46' 40"}
  SUN_DIST:        140.52 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.70d {+02h 14m 49s}   +9.94d {+09d 56' 19"}
  MOON_DIST:       101.03 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.01, 16.85 [deg] galactic lon,lat of the burst
  ECL_COORDS:      140.03,-32.77 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.  
  COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
  COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
  COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:03:37 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.354d {-16d 21' 14"} (J2000)
  POINT_ROLL:      160.220d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50431.10 SOD {14:00:31.10} UT,   63.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.986
  N_STARS:         101
  X_OFFSET:        360 [pixels]
  Y_OFFSET:        584 [pixels]
  X_MAX:           1319 [pixels]
  Y_MAX:           1543 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00670800000msufc0063.fits
  SUN_POSTN:       298.93d {+19h 55m 42s}  -20.78d {-20d 46' 39"}
  SUN_DIST:        140.53 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.73d {+02h 14m 55s}   +9.94d {+09d 56' 42"}
  MOON_DIST:       101.01 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.86 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:04:06 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.354d {-16d 21' 14"} (J2000)
  POINT_ROLL:      160.220d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50431.10 SOD {14:00:31.10} UT,   63.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.986
  N_STARS:         101
  X_OFFSET:        360 [pixels]
  Y_OFFSET:        584 [pixels]
  X_MAX:           1319 [pixels]
  Y_MAX:           1543 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00670800000msufc0063.fits
  SUN_POSTN:       298.93d {+19h 55m 42s}  -20.78d {-20d 46' 39"}
  SUN_DIST:        140.53 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.73d {+02h 14m 56s}   +9.95d {+09d 56' 46"}
  MOON_DIST:       101.00 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.86 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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:     Sun 17 Jan 16 14:04:57 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.354d {-16d 21' 14"} (J2000)
  ROLL:            160.220d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50431.10 SOD {14:00:31.10} UT,   63.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     474732046
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        857 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1017
  BINNING_INDEX:   1
  IM_URL:          sw00670800000msuni0079.fits
  SUN_POSTN:       298.93d {+19h 55m 42s}  -20.78d {-20d 46' 38"}
  SUN_DIST:        140.53 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.74d {+02h 14m 58s}   +9.95d {+09d 56' 54"}
  MOON_DIST:       101.00 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.86 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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:     Sun 17 Jan 16 14:05:16 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.354d {-16d 21' 14"} (J2000)
  ROLL:            160.220d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50431.10 SOD {14:00:31.10} UT,   63.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     474732046
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        857 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1017
  BINNING_INDEX:   1
  IM_URL:          sw00670800000msuni0079.fits
  SUN_POSTN:       298.93d {+19h 55m 42s}  -20.78d {-20d 46' 38"}
  SUN_DIST:        140.53 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.74d {+02h 14m 59s}   +9.95d {+09d 56' 57"}
  MOON_DIST:       100.99 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.86 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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:     Sun 17 Jan 16 14:07:43 UT
  NOTICE_TYPE:     Swift-UVOT Position
  TRIGGER_NUM:     670800,   Seg_Num: 0
  GRB_RA:          132.1948d {+08h 48m 46.75s} (J2000),
                   132.3809d {+08h 49m 31.42s} (current),
                   131.6148d {+08h 46m 27.54s} (1950)
  GRB_DEC:         -16.3666d {-16d 21' 59.7"} (J2000),
                   -16.4267d {-16d 25' 36.1"} (current),
                   -16.1807d {-16d 10' 50.3"} (1950)
  GRB_ERROR:       0.6 [arcsec radius, statistical only]
  GRB_MAG:         18.31 +/- 0.14 [mag]
  FILTER:          10, White
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50429.00 SOD {14:00:29.00} UT,   61.4 [sec] since BAT Trigger Time
  SUN_POSTN:       298.93d {+19h 55m 43s}  -20.78d {-20d 46' 37"}
  SUN_DIST:        140.52 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.77d {+02h 15m 04s}   +9.96d {+09d 57' 20"}
  MOON_DIST:       100.98 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.01, 16.85 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      140.03,-32.77 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT UVOT Position Notice.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        The UVOT position is 4.0 arcsec from the XRT position.  
  COMMENTS:        Result based on Genie data.  
  COMMENTS:        Notice generated automatically.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:11:31 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 23"} (J2000)
  POINT_ROLL:      160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50643.35 SOD {14:04:03.35} UT,   275.7 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.565
  N_STARS:         86
  X_OFFSET:        541 [pixels]
  Y_OFFSET:        537 [pixels]
  X_MAX:           1500 [pixels]
  Y_MAX:           1496 [pixels]
  DET_THRESH:      7
  PHOTO_THRESH:    3
  SL_URL:          sw00670800000msufc0275.fits
  SUN_POSTN:       298.93d {+19h 55m 43s}  -20.78d {-20d 46' 35"}
  SUN_DIST:        140.53 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.80d {+02h 15m 13s}   +9.97d {+09d 57' 56"}
  MOON_DIST:       100.94 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:11:49 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 23"} (J2000)
  POINT_ROLL:      160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50643.35 SOD {14:04:03.35} UT,   275.7 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.565
  N_STARS:         86
  X_OFFSET:        541 [pixels]
  Y_OFFSET:        537 [pixels]
  X_MAX:           1500 [pixels]
  Y_MAX:           1496 [pixels]
  DET_THRESH:      7
  PHOTO_THRESH:    3
  SL_URL:          sw00670800000msufc0275.fits
  SUN_POSTN:       298.93d {+19h 55m 43s}  -20.78d {-20d 46' 35"}
  SUN_DIST:        140.53 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.81d {+02h 15m 14s}   +9.97d {+09d 57' 59"}
  MOON_DIST:       100.94 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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:     Sun 17 Jan 16 14:12:05 UT
  NOTICE_TYPE:     Swift-XRT Position UPDATE
  TRIGGER_NUM:     670800,   Seg_Num: 0
  GRB_RA:          132.1953d {+08h 48m 46.87s} (J2000),
                   132.3814d {+08h 49m 31.54s} (current),
                   131.6153d {+08h 46m 27.66s} (1950)
  GRB_DEC:         -16.3668d {-16d 22' 00.4"} (J2000),
                   -16.4269d {-16d 25' 36.8"} (current),
                   -16.1809d {-16d 10' 51.0"} (1950)
  GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50566.00 SOD {14:02:46.00} UT,   198.4 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       298.93d {+19h 55m 44s}  -20.78d {-20d 46' 35"}
  SUN_DIST:        140.52 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.81d {+02h 15m 14s}   +9.97d {+09d 58' 01"}
  MOON_DIST:       100.94 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.01, 16.85 [deg] galactic lon,lat of the burst
  ECL_COORDS:      140.03,-32.77 [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:     Sun 17 Jan 16 14:12:56 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 23"} (J2000)
  ROLL:            160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50643.35 SOD {14:04:03.35} UT,   275.7 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     474732259
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        857 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1017
  BINNING_INDEX:   1
  IM_URL:          sw00670800000msuni0291.fits
  SUN_POSTN:       298.93d {+19h 55m 44s}  -20.78d {-20d 46' 34"}
  SUN_DIST:        140.54 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.82d {+02h 15m 16s}   +9.97d {+09d 58' 09"}
  MOON_DIST:       100.93 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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:     Sun 17 Jan 16 14:12:38 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 23"} (J2000)
  ROLL:            160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  50643.35 SOD {14:04:03.35} UT,   275.7 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     474732259
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        857 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1017
  BINNING_INDEX:   1
  IM_URL:          sw00670800000msuni0291.fits
  SUN_POSTN:       298.93d {+19h 55m 44s}  -20.78d {-20d 46' 34"}
  SUN_DIST:        140.54 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.81d {+02h 15m 15s}   +9.97d {+09d 58' 06"}
  MOON_DIST:       100.93 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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 Circular #18875
  E. Sonbas (Adiyaman Univ.), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester) and D. M. Palmer (LANL) report on behalf of the Swift Team:
  At 13:59:27 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160117B (trigger=670793). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 132.190, -16.340 which is

    RA(J2000) = 08h 48m 46s
    Dec(J2000) = -16d 20' 23"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 60 sec. The peak count rate was ~1300 counts/sec (15-350 keV), at ~7 sec after the trigger.
  The XRT began observing the field at 14:00:22.5 UT, 55.0 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source with an enhanced position: RA, Dec 132.1953, -16.3668 which is equivalent to:

     RA(J2000)  = 08h 48m 46.88s
     Dec(J2000) = -16d 22' 00.4"
  

  with an uncertainty of 2.2 arcseconds (radius, 90% containment). This location is 98 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.
  A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 5.71 x 10^20 cm^-2 (Willingale et al. 2013).
  The initial flux in the 2.5 s image was 4.84e-09 erg cm^-2 s^-1 (0.2-10 keV).
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 63 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at

    RA(J2000)  =	08:48:46.76 = 132.19484
    DEC(J2000) = -16:21:59.9  = -16.36664
  

  with a 90%-confidence error radius of about 0.62 arc sec. This position is 3.2 arc sec. from the center of the XRT error circle. The estimated magnitude is 18.32 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.07.
  Burst Advocate for this burst is E. Sonbas (edasonbas AT yahoo.com). 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:     Sun 17 Jan 16 14:18:14 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 24"} (J2000)
  POINT_ROLL:      160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  51243.77 SOD {14:14:03.77} UT,   876.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.822
  N_STARS:         190
  X_OFFSET:        301 [pixels]
  Y_OFFSET:        297 [pixels]
  X_MAX:           1740 [pixels]
  Y_MAX:           1736 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00670800000msufc0876.fits
  SUN_POSTN:       298.94d {+19h 55m 45s}  -20.78d {-20d 46' 32"}
  SUN_DIST:        140.54 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.87d {+02h 15m 28s}   +9.98d {+09d 58' 59"}
  MOON_DIST:       100.88 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 17 Jan 16 14:18:41 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 24"} (J2000)
  POINT_ROLL:      160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  51243.77 SOD {14:14:03.77} UT,   876.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.822
  N_STARS:         190
  X_OFFSET:        301 [pixels]
  Y_OFFSET:        297 [pixels]
  X_MAX:           1740 [pixels]
  Y_MAX:           1736 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00670800000msufc0876.fits
  SUN_POSTN:       298.94d {+19h 55m 45s}  -20.78d {-20d 46' 31"}
  SUN_DIST:        140.54 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.87d {+02h 15m 29s}   +9.98d {+09d 59' 03"}
  MOON_DIST:       100.88 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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:     Sun 17 Jan 16 14:19:37 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 24"} (J2000)
  ROLL:            160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  51243.77 SOD {14:14:03.77} UT,   876.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     474732859
  X_OFFSET:        860 [pixels]
  Y_OFFSET:        856 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1020
  Y_GRB_POS:       1016
  BINNING_INDEX:   1
  IM_URL:          sw00670800000msuni0892.fits
  SUN_POSTN:       298.94d {+19h 55m 45s}  -20.78d {-20d 46' 31"}
  SUN_DIST:        140.54 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.88d {+02h 15m 32s}   +9.99d {+09d 59' 12"}
  MOON_DIST:       100.87 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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:     Sun 17 Jan 16 14:19:54 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     670800,   Seg_Num: 0
  POINT_RA:        132.193d {+08h 48m 46s} (J2000)
  POINT_DEC:       -16.357d {-16d 21' 24"} (J2000)
  ROLL:            160.219d
  IMG_START_DATE:  17404 TJD;    17 DOY;   16/01/17
  IMG_START_TIME:  51243.77 SOD {14:14:03.77} UT,   876.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     474732859
  X_OFFSET:        860 [pixels]
  Y_OFFSET:        856 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1020
  Y_GRB_POS:       1016
  BINNING_INDEX:   1
  IM_URL:          sw00670800000msuni0892.fits
  SUN_POSTN:       298.94d {+19h 55m 45s}  -20.78d {-20d 46' 31"}
  SUN_DIST:        140.54 [deg]   Sun_angle= 11.1 [hr] (West of Sun)
  MOON_POSTN:       33.88d {+02h 15m 32s}   +9.99d {+09d 59' 14"}
  MOON_DIST:       100.87 [deg]
  MOON_ILLUM:      57 [%]
  GAL_COORDS:      242.00, 16.85 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      140.03,-32.76 [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 #18877
  V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
  E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University
  K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
  V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka
  A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik Kislovodsk Solar Station of the Pulkovo Observatory
  D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory
  Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
  Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA)
  R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias
  MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB160117B (Sonbas et. al. GCN 18875) and made first exposition 19 sec after notice time and 35 sec after trigger time at 2016-01-17 14:04:35 UT. But due to some problem with mount on strong frost (-40 deg) we have a ~4 deg. poining error and do not cover GRB160117B error box. We correct this error and made first (60 sec exposure) image with GRB160117B error box at 2016-01-17 14:21:31 i.e. 1323 sec. after the trigger with upper limit 17.0. On one of coadd image (with total exposure 180 sec, 1696 sec after the trigger) we see GRB160117B optical counterpart (Sonbas et. al. GCN 18875) with 17.5 mag. All magnitudes are unfiltered (0.2B+0.8R) with respect to number USNO B1.0 stars. The message may be cited.
• GCN Circular #18878
  T. Kruehler (MPE), D. Xu (NAOC/CAS), Y.-D. Hu (IAA-CSIC), Y. Qing (Geneva Observatory), Y.-H. Han (NAOC/CAS, HUST) report:
  We observed the field of GRB 160117B (Swift trigger 670793, Sonbas et al., GCN 18875) using the LCOGT-1m located at the Siding Spring Observatory. Observations started at 14:20:45 UT on 2016-01-17 (i.e., 1278 s after the burst), and a series of 180 s R-band images have been obtained. Further observations are ongoing.
  The optical afterglow is detected at coordinates:

  R.A. (J2000) = 08:48:46.74
  Dec. (J2000) = -16:22:00.0
  

  with an error radius of 0.2 arcsec, which is fully consistent with the UVOT position from GCN 18875. The afterglow has R = 18.3 +- 0.1 mag from the first 180 s exposure, calibrated with the nearby USNO B1 stars (R1 magnitudes). The afterglow has been decaying rather slowly, with a decay slope of -0.5 +- 0.1 so far.
• GCN Circular #18880
  P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
  Using 2434 s of XRT Photon Counting mode data and 5 UVOT images for GRB 160117B, 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 = 132.19454, -16.36675 which is equivalent to:

  RA (J2000): 08h 48m 46.69s
  Dec (J2000): -16d 22' 00.3"
  

  with an uncertainty of 2.0 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 #18881
  L. M. Z. Hagen (PSU) and E. Sonbas (Adiyaman Univ.) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 160117B 64 s after the BAT trigger (Sonbas et al. GCN Circ. 18875). We detect a fading source consistent with the XRT position (Evans et al. GCN Circ. 18880) and optical detections (Yurkov et al. GCN Circ. 18877, Kruehler et al. GCN Circ. 18878).
  The preliminary UVOT position is:

      RA  (J2000) =  08:48:46.76 = 132.19485 (deg.)
      Dec (J2000) = -16:22:00.1  = -16.36670 (deg.)
  

  with an estimated uncertainty of 0.44 arc sec. (radius, 90% confidence).
  Preliminary detections 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               63          213          147         18.24+-0.06
  white              876         1025          147         18.26+-0.06
  white             5700         5899          196         19.22+-0.09
  white             7136         7335          196         19.48+-0.11
  v                 6111         6311          196        >19.27
  b                 5495         5695          196         19.84+-0.26
  b                 6931         7131          196        >20.22
  u                  275          525          245         17.84+-0.08
  u                 5290         5489          196         19.13+-0.20
  u                 6725         6925          196         19.14+-0.21
  w1                5085         5285          196         18.75+-0.19
  w1                6521         6721          196         18.90+-0.21
  m2                6316         6515          196         19.22+-0.29
  w2                5905         6105          196         19.18+-0.23
  w2                7341         7533          188         19.50+-0.31
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.07 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #18883
  P.A. Evans (U. Leicester), A. D'Ai (INAF-IASFPA), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), S.L. Gibson (U. Leicester), J.P. Osborne (U. Leicester) and E. Sonbas report on behalf of the Swift-XRT team:
  We have analysed 9.8 ks of XRT data for GRB 160117B (Sonbas et al. GCN Circ. 18875), from 48 s to 24.8 ks after the BAT trigger. The data comprise 135 s in Windowed Timing (WT) mode (the first 5 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 Evans et al. (GCN Circ. 18880).
  The late-time light curve (from T0+5.1 ks) can be modelled with a power-law decay with a decay index of alpha=0.77 (+0.25, -0.24).
  A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.36 (+0.08, -0.07). The best-fitting absorption column is 1.31 (+0.19, -0.18) x 10^21 cm^-2, in excess of the Galactic value of 5.7 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.88 (+0.14, -0.13) and a best-fitting absorption column of 8.8 (+3.7, -3.1) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.5 x 10^-11 (4.1 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     8.8 (+3.7, -3.1) x 10^20 cm^-2
  Galactic foreground: 5.7 x 10^20 cm^-2
  Excess significance: <1.6 sigma
  Photon index:	     1.88 (+0.14, -0.13)
  

  If the light curve continues to decay with a power-law decay index of 0.77, the count rate at T+24 hours will be 8.4 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.0 x 10^-13 (3.5 x 10^-13) erg cm^-2 s^-1.
  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00670800.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #18884
  D. Malesani (DARK/NBI), A. de Ugarte Postigo (IAA/CSIC and DARK/NBI), R. Carrera (IAC), P. Jakobsson (Univ. Iceland), report on behalf of a larger collaboration:
  We observed the optical counterpart of GRB 160117B (Sonbas et al., GCN 18875; Yurkov et al., GCN 18877; Kruehler et al., GCN 18878) with the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera.
  In a 300-s exposure taken starting on Jan 18.028 UT (10.7 hr after the GRB), we measure for the afterglow a magnitude of R = 20.36 +- 0.11 (Vega), calibrated against several nearby USNO-B1 stars (R1 magnitudes), with the uncertainty mostly due to the scatter in the USNO values.
• GCN Circular #18885
  Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill Observatory, Varkaus, Finland) report:
  We have detected GRB 160117B optical afterglow at iTelescope observatory T17 using 0.43-m f/6.8 astrograph and FLI ProLine E2V CCD. The observations were started at 2016-01-17 14:34:35 (UT). Nine unfiltered images with 300 sec exposure time were taken.
  The afterglow was detected at the position RA 08:48:46.85 and DEC -16:22:00.0.
  The following magnitude was obtained from the observations using USNO-B1.0 0736-0196371 (R1=16.52) as a comparison star:

  Tmid(s)+T0     Filter          Exp. time          Mag               Mag. Err.
  4367               Clear          9x300s             18.6CR          0.2
  

• GCN Circular #18886
  A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), G. Pugliese (API/UvA), D. Xu (NAOC/CAS), D. Malesani (DARK/NBI) report on behalf of a larger collaboration:
  We observed the afterglow of GRB 160117B (Sonbas et al., GCN 18875; Yurkov et al., GCN 18877; Kruehler et al., GCN 18878, Malesani et al. GCN 18884, Hentunen et al. GCN 18885) with ESO's Very Large Telescope UT2 equipped with X-shooter. The spectra cover the range between 3000 and 18000 AA. Observations consisted of 4x1200s exposures, starting at 03:26 UT (13.45 hr after the GRB onset).
  The optical counterpart is clearly detected in our grz acquisition images.
  A preliminary analysis of the spectrum shows a clear continuum with absorption features due to FeII, MgII, as well as emission features of [OII], [OIII] and H-beta at a common redshift of 0.870, which we propose as redshift of the GRB.
  We acknowledge the excellent support provided by the Paranal staff.
• GCN Circular #18887
  T.-W. Chen, T. Kruehler and J. Greiner (all MPE Garching) report on behalf of the GROND team:
  We observed the field of GRB 160117B (Sonbas et al., GCN 18875) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile).
  Observations started at 00:54 UT on 2016-01-18, about 11 hours after the GRB trigger. The optical afterglow (Sonbas et al., GCN 18875; Yurkov et al., GCN 18877; Kruehler et al., GCN 18878, Malesani et al. GCN 18884, Hentunen et al. GCN 18885, de Ugarte Postigo et al. GCN 18886) is clearly detected in our images.
  Based on 29 min of total exposure in g'r'i'z' and 24 min in JHK at a midtime of 01:12 UT on 2016-01-18, we estimate the following preliminary magnitudes (all in the AB system):

    g' = 20.8 +- 0.1 mag
    r' = 20.7 +- 0.1 mag
    i' = 20.6 +- 0.1 mag
    z' = 20.4 +- 0.1 mag
    J  = 20.0 +- 0.2 mag
    H  = 19.8 +- 0.2 mag
    K  > 18.9 mag
  

  Given magnitudes are calibrated against GROND zeropoints as well as 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.058 mag in the direction of the burst (Schlafly & Finkbeiner 2011).
• GCN Circular #18894
  L. Izzo (URoma1/ICRA), T. Sakamot (AGU)
  We observed the field of GRB 160117B (Sonbas et al., GCN 18875; Evans et al., GCN 18883; Yurkov et al., GCN 18877; Kruehler et al., GCN 18878; Malesani et al., GCN 18884; Hentunen et al., GCN 18885) with the iTelescope.Net (http://www.itelescope.net) T17 (Plane Wave CDK 0.43m) telescope located at the Siding Spring Observatory (Australia). A single image of 300 s was taken in the R filter, starting at 14:10:03 UT, 636 s after the GRB trigger. We detect the GRB optical afterglow candidate and obtain a photometry estimate of R = 17.523 +- 0.126 using the USNO-B1 catalog.
  An image of the field of view can be seen at http://goo.gl/aesww1
• GCN Circular #18898
  D. Malesani (DARK/NBI), D. Xu (NAOC/CAS), C.E. Martinez-Vazquez (IAC-ULL), and P. Jakobsson (Univ. Iceland) report on behalf of a larger collaboration.
  We observed again the optical counterpart of GRB 160117B (Sonbas et al., GCN 18875), using the NOT equipped with the AlFOSC camera. Our observation was carried out in the R band and was composed of 4x300 s exposures, with mean time January 19.10 UT (1.52 days after the GRB).
  Compared to our previous observation (Malesani et al., GCN 18884), we find a decay slope alpha = 1.10 +- 0.05 (assuming a single power-law decay F propto t^-alpha). This decay is steeper than what reported at early time by Kruehler et al. (GCN 18878).
• GCN Circular #18900
  Antonino Cucchiara(GSFC/STScI),Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC),William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Eleonora=20 Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 = A.=20 de Diego (UNAM), Leonid Georgiev (UNAM), Jes=FAs Gonz=E1lez (UNAM), Carlo= s=20 Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC),=20 John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
  We observed the field of GRB 160117B (Sonbas et al., GCN 18875) 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 2016/01 19.19 to 2016/01 19.36 UTC (38.57 to 42.63 hours after the BAT trigger), obtaining a total of 2.76 hours exposure in the r, i, and z bands.
  For a source within the Swift-XRT error circle, in comparison with the USNO-B1 and 2MASS catalogs, we obtain the following upper limits (3-sigma):

    r	> 23.57
    i	> 23.55
    z	> 19.97
  

  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 #18907
  Antonino Cucchiara(GSFC/STScI),Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC),William H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Eleonora=20 Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 = A.=20 de Diego (UNAM), Leonid Georgiev (UNAM), Jes=FAs Gonz=E1lez (UNAM), Carlo= s=20 Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC),=20 John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
  We observed again the field of GRB 160117B (Sonbas et al., GCN 18875) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.or= g <http://www.ratir.org/>)=20 on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Na= cional=20 on Sierra San Pedro M=E1rtir from 2016/01 20.21 to 2016/01 20.36 UTC (63.= 10 to 66.61 hours after the BAT trigger), obtaining a total of 2.51 hours exposure in the r and i bands.
  In comparison with the USNO-B1 and 2MASS catalogs, we obtain the following detections:

    r	23.04 +/- 0.27
    i	22.20 +/- 0.12=20
  

  Also, after further analysis of the RATIR full dataset on GRB 160117B=20 from 2016/01 19.19 to 2016/01 19.36 UTC (38.57 to 42.63 hours after the B= AT trigger) we report the following detections in r and i bands:=20

    r  22.30 +/- 0.11
    i  21.96 +/- 0.08
  

  The previously reported, incorrect, limits should not to be considered (GCN 18900).
  We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir. We thank D. Malesani, the NOT, and GROND teams for encouraging us to reconsider our earlier observations.
• GCN Circular #18908
  K. D. Alexander (Harvard), T. Laskar (NRAO / UC Berkeley), E. Berger (Harvard), and W. Fong (U. Arizona) report on behalf of a larger collaboration:
  We observed GRB 160117B (Sonbas et al, GCN 18875) at multiple frequencies with the Karl G. Jansky Very Large Array (VLA) beginning 2016 January 20.28 UT (2.70 days after the burst). At a mean frequency of 21.8 GHz, we detect a radio source with a preliminary flux density of ~ 0.1 mJy at

  RA = 08:48:46.737 +/- 0.5=E2=80=9D
  Dec = -16:22:00.09 +/- 0.2=E2=80=9D
  

  consistent with the enhanced Swift/XRT position (Evans et al., GCN 18880) and the optical position (Crueler et al,. GCN 18878; Hagen and Sonbas, GCN 18881). Follow-up observations are planned.
  We thank the VLA staff for rapidly executing these observations.
• GCN Circular #18915
  V. D=EF=BF=BDElia (INAF-OAR/ASI-ASDC), A. Melandri (INAF-OAB), L. A. Anto= nelli (INAF-OAR/ASI-ASDC), D. Malesani (DARK/NBI) report on behalf of the= CIBO collaboration:
  We observed the afterglow of GRB 160117B (Sonbas et al., GCN 18875) with = the TNG equipped with DOLORES and the LR-B grism. The spectrum was acquir= ed on 2016-01-18 and covers the range between 3000 and 7800 AA. The obser= vation consisted of 2x1800 s exposures, starting at 01:31 UT (11.50 hr af= ter the trigger).
  The optical counterpart is detected in the acquisition images with a magn= itude of R =3D 20.3 +/- 0.2 at 11.5 hr after the GRB trigger, calibrated = against USNO-B1 stars.
  The spectrum has a low S/N ratio but shows a clear continuum. Two absorpt= ion and an emission features are consistent with the Mg II doublet and th= e [O II] line at a redshift of z =3D 0.86 +/- 0.01, thus confirming what = reported by de Ugarte Postigo et al. (GCN 18886).
  We thanks the TNG staff for excellent support, in particular Hristo Stoev= and Luca Di Fabrizio.