Gamma-ray Burst 150206A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:31:22 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     630019,   Seg_Num: 0
  GRB_RA:           10.088d {+00h 40m 21s} (J2000),
                    10.252d {+00h 41m 01s} (current),
                     9.542d {+00h 38m 10s} (1950)
  GRB_DEC:         -63.182d {-63d 10' 53"} (J2000),
                   -63.099d {-63d 05' 56"} (current),
                   -63.456d {-63d 27' 21"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       0 [cnts]    Image_Peak=1867 [image_cnts]
  TRIGGER_DUR:     64.000 [sec] 
  TRIGGER_INDEX:   20000     E_range: 15-50 keV
  BKG_INTEN:       0 [cnts]
  BKG_TIME:        0.00 SOD {00:00:00.00} UT
  BKG_DUR:         0 [sec]
  GRB_DATE:        17059 TJD;    37 DOY;   15/02/06
  GRB_TIME:        52202.84 SOD {14:30:02.84} UT
  GRB_PHI:         -46.48 [deg]
  GRB_THETA:        34.95 [deg]
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    9.92 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0 -51  +0 
  SUN_POSTN:       319.92d {+21h 19m 42s}  -15.59d {-15d 35' 39"}
  SUN_DIST:         58.81 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.38d {+11h 05m 32s}   +3.53d {+03d 31' 48"}
  MOON_DIST:       117.90 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.05,-53.90 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      327.54,-58.24 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
  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 = 243.26,-10.20 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:37:52 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     10289157,   Seg_Num: 0
  GRB_RA:           10.088d {+00h 40m 21s} (J2000),
                    10.252d {+00h 41m 01s} (current),
                     9.542d {+00h 38m 10s} (1950)
  GRB_DEC:         -63.182d {-63d 10' 53"} (J2000),
                   -63.099d {-63d 05' 56"} (current),
                   -63.456d {-63d 27' 21"} (1950)
  GRB_DATE:        17059 TJD;    37 DOY;   15/02/06
  GRB_TIME:        52202.84 SOD {14:30:02.84} UT
  TRIGGER_INDEX:   20000
  GRB_PHI:         -46.48 [deg]
  GRB_THETA:        34.95 [deg]
  DELTA_TIME:      61.00 [sec]
  TRIGGER_DUR:     64.000 [sec] 
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    0.00 [sigma]
  LC_URL:          sw00630019000msb.lc
  SUN_POSTN:       319.93d {+21h 19m 43s}  -15.59d {-15d 35' 34"}
  SUN_DIST:         58.81 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.43d {+11h 05m 44s}   +3.51d {+03d 30' 48"}
  MOON_DIST:       117.89 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.05,-53.90 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      327.54,-58.24 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        WARNING: No BAT_Position TDRSS message was received for this trigger_number!  
  COMMENTS:           
  COMMENTS:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is an image 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 = 243.26,-10.20 [deg].  
  COMMENTS:        The 3rd packet (of 3) was missing in the lightcurve data stream.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:55:11 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     630019,   Seg_Num: 0
  GRB_RA:           10.0774d {+00h 40m 18.57s} (J2000),
                    10.2416d {+00h 40m 57.98s} (current),
                     9.5312d {+00h 38m 07.49s} (1950)
  GRB_DEC:         -63.1852d {-63d 11' 06.7"} (J2000),
                   -63.1025d {-63d 06' 08.8"} (current),
                   -63.4595d {-63d 27' 34.3"} (1950)
  GRB_ERROR:       5.1 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       2.35e-09 [erg/cm2/sec]
  GRB_SIGNIF:      9.11 [sigma]
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52677.34 SOD {14:37:57.34} UT,   474.5 [sec] since BAT Trigger Time
  TAM[0-3]:        327.68 237.21 261.57 243.24
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:       319.94d {+21h 19m 46s}  -15.59d {-15d 35' 21"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.57d {+11h 06m 17s}   +3.47d {+03d 28' 08"}
  MOON_DIST:       117.87 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.90 [deg] galactic lon,lat of the burst
  ECL_COORDS:      327.53,-58.24 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        The XRT position is 0.35 arcmin from the BAT position.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:55:23 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     630019,   Seg_Num: 0
  GRB_RA:           10.0774d {+00h 40m 18.5s} (J2000),
                    10.2416d {+00h 40m 57.9s} (current),
                     9.5312d {+00h 38m 07.4s} (1950)
  GRB_DEC:         -63.1852d {-63d 11' 06.7"} (J2000),
                   -63.1025d {-63d 06' 08.8"} (current),
                   -63.4595d {-63d 27' 34.3"} (1950)
  GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       83 [cnts]
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52677.34 SOD {14:37:57.34} UT,   474.5 [sec] since BAT Trigger Time
  CENTROID_X:      310.96,  raw= 311  [pixels]
  CENTROID_Y:      313.47,  raw= 313  [pixels]
  ROLL:            300.17 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   36.94
  GRB_POS_XRT_Z:   13.36
  IMAGE_URL:       sw00630019000msxps_rw.img
  SUN_POSTN:       319.94d {+21h 19m 46s}  -15.59d {-15d 35' 21"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.57d {+11h 06m 17s}   +3.47d {+03d 28' 07"}
  MOON_DIST:       117.87 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.90 [deg] galactic lon,lat of the burst
  ECL_COORDS:      327.53,-58.24 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:55:33 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     630019,   Seg_Num: 0
  GRB_RA:           10.0774d {+00h 40m 18.5s} (J2000),
                    10.2416d {+00h 40m 57.9s} (current),
                     9.5312d {+00h 38m 07.4s} (1950)
  GRB_DEC:         -63.1852d {-63d 11' 06.7"} (J2000),
                   -63.1025d {-63d 06' 08.8"} (current),
                   -63.4595d {-63d 27' 34.3"} (1950)
  GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       83 [cnts]
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52677.34 SOD {14:37:57.34} UT,   474.5 [sec] since BAT Trigger Time
  CENTROID_X:      310.96,  raw= 311  [pixels]
  CENTROID_Y:      313.47,  raw= 313  [pixels]
  ROLL:            300.17 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   36.94
  GRB_POS_XRT_Z:   13.36
  IMAGE_URL:       sw00630019000msxps_rw.img
  SUN_POSTN:       319.94d {+21h 19m 46s}  -15.59d {-15d 35' 20"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.57d {+11h 06m 17s}   +3.47d {+03d 28' 05"}
  MOON_DIST:       117.87 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.90 [deg] galactic lon,lat of the burst
  ECL_COORDS:      327.53,-58.24 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:56:06 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     630019,   Seg_Num: 0
  POINT_RA:         10.081d {+00h 40m 19s} (J2000)
  POINT_DEC:       -63.174d {-63d 10' 27"} (J2000)
  POINT_ROLL:      300.167d
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52685.86 SOD {14:38:05.86} UT,   483.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        5.281
  N_STARS:         15
  X_OFFSET:        432 [pixels]
  Y_OFFSET:        552 [pixels]
  X_MAX:           1391 [pixels]
  Y_MAX:           1511 [pixels]
  DET_THRESH:      19
  PHOTO_THRESH:    11
  SL_URL:          sw00630019000msufc0483.fits
  SUN_POSTN:       319.94d {+21h 19m 46s}  -15.59d {-15d 35' 20"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.58d {+11h 06m 18s}   +3.47d {+03d 27' 60"}
  MOON_DIST:       117.88 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.91 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      327.55,-58.23 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:56:29 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     630019,   Seg_Num: 0
  POINT_RA:         10.081d {+00h 40m 19s} (J2000)
  POINT_DEC:       -63.174d {-63d 10' 27"} (J2000)
  POINT_ROLL:      300.167d
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52685.86 SOD {14:38:05.86} UT,   483.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        5.281
  N_STARS:         15
  X_OFFSET:        432 [pixels]
  Y_OFFSET:        552 [pixels]
  X_MAX:           1391 [pixels]
  Y_MAX:           1511 [pixels]
  DET_THRESH:      19
  PHOTO_THRESH:    11
  SL_URL:          sw00630019000msufc0483.fits
  SUN_POSTN:       319.94d {+21h 19m 46s}  -15.59d {-15d 35' 20"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.58d {+11h 06m 19s}   +3.47d {+03d 27' 56"}
  MOON_DIST:       117.88 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.91 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      327.55,-58.23 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 14:57:58 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     630019,   Seg_Num: 0
  POINT_RA:         10.081d {+00h 40m 19s} (J2000)
  POINT_DEC:       -63.174d {-63d 10' 27"} (J2000)
  ROLL:            300.167d
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52685.86 SOD {14:38:05.86} UT,   483.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     444926299
  X_OFFSET:        749 [pixels]
  Y_OFFSET:        830 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       909
  Y_GRB_POS:       990
  BINNING_INDEX:   1
  IM_URL:          sw00630019000msuni0497.fits
  SUN_POSTN:       319.94d {+21h 19m 46s}  -15.59d {-15d 35' 19"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.59d {+11h 06m 22s}   +3.46d {+03d 27' 43"}
  MOON_DIST:       117.88 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.91 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      327.55,-58.23 [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:     Fri 06 Feb 15 14:58:13 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     630019,   Seg_Num: 0
  POINT_RA:         10.081d {+00h 40m 19s} (J2000)
  POINT_DEC:       -63.174d {-63d 10' 27"} (J2000)
  ROLL:            300.167d
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52685.86 SOD {14:38:05.86} UT,   483.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     444926299
  X_OFFSET:        749 [pixels]
  Y_OFFSET:        830 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       909
  Y_GRB_POS:       990
  BINNING_INDEX:   1
  IM_URL:          sw00630019000msuni0497.fits
  SUN_POSTN:       319.94d {+21h 19m 46s}  -15.59d {-15d 35' 18"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.59d {+11h 06m 22s}   +3.46d {+03d 27' 40"}
  MOON_DIST:       117.88 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.91 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      327.55,-58.23 [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:     Fri 06 Feb 15 15:01:26 UT
  NOTICE_TYPE:     Swift-UVOT Position
  TRIGGER_NUM:     630019,   Seg_Num: 0
  GRB_RA:           10.0735d {+00h 40m 17.63s} (J2000),
                    10.2377d {+00h 40m 57.04s} (current),
                     9.5273d {+00h 38m 06.54s} (1950)
  GRB_DEC:         -63.1821d {-63d 10' 55.5"} (J2000),
                   -63.0994d {-63d 05' 57.6"} (current),
                   -63.4564d {-63d 27' 23.1"} (1950)
  GRB_ERROR:       0.8 [arcsec radius, statistical only]
  GRB_MAG:         18.62 +/- 0.16 [mag]
  FILTER:          10, White
  IMG_START_DATE:  17059 TJD;    37 DOY;   15/02/06
  IMG_START_TIME:  52684.00 SOD {14:38:04.00} UT,   481.2 [sec] since BAT Trigger Time
  SUN_POSTN:       319.94d {+21h 19m 47s}  -15.59d {-15d 35' 16"}
  SUN_DIST:         58.80 [deg]   Sun_angle= -3.4 [hr] (East of Sun)
  MOON_POSTN:      166.62d {+11h 06m 28s}   +3.45d {+03d 27' 11"}
  MOON_DIST:       117.87 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      305.06,-53.90 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      327.54,-58.23 [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 13.0 arcsec from the XRT position.  
  COMMENTS:        Result based on Genie data.  
  COMMENTS:        Notice generated automatically.  
  

• GCN Circular #17413
  L. M. Z. Hagen (PSU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), M.E. Gropp (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), F. E. Marshall (NASA/GSFC), 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 14:30:02 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 150206A (trigger=630019). Swift did not immediately slew due to observing constraint. The BAT on-board calculated location is RA, Dec 10.088, -63.182, which is

     RA(J2000)  =  00h 40m 21s
     Dec(J2000) = -63d 10' 53"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a weak beginning with a strong increase starting at ~T+70 sec. The duration is about 150 sec. The peak count rate was ~8000 counts/sec (15-350 keV), at ~97 sec after the trigger.
  The XRT began observing the field at 14:37:57.3 UT, 474.5 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 10.0774, -63.1852 which is equivalent to:

     RA(J2000)  = +00h 40m 18.58s
     Dec(J2000) = -63d 11' 06.7"
  

  with an uncertainty of 5.1 arcseconds (radius, 90% containment). This location is 20 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
  The initial flux in the 2.5 s image was 2.35e-09 erg cm^-2 s^-1 (0.2-10 keV).
  UVOT took a finding chart exposure of 94 seconds with the White filter starting 483 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at

    RA(J2000)  =	00:40:17.66 =  10.07358
    DEC(J2000) = -63:10:55.6  = -63.18211
  

  with a 90%-confidence error radius of about 0.78 arc sec. This position is 12.7 arc sec. from the center of the XRT error circle. The estimated magnitude is 18.62 with a 1-sigma error of about 0.16. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
  Burst Advocate for this burst is L. M. Z. Hagen (lea.zernow.hagen AT gmail.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/BACODINE POSITION NOTICE
  

  TITLE:           GCN/MAXI NOTICE
  NOTICE_DATE:     Fri 06 Feb 15 15:43:10 UT
  NOTICE_TYPE:     MAXI Unknown Source Position
  EVENT_ID_NUM:    59974130
  EVENT_RA:         10.09d {+00h 40m 21s} (J2000),
                    10.25d {+00h 41m 00s} (current),
                     9.54d {+00h 38m 10s} (1950)
  EVENT_DEC:       -63.18d {-63d 10' 54"} (J2000),
                   -63.10d {-63d 05' 56"} (current),
                   -63.46d {-63d 27' 22"} (1950)
  EVENT_ERROR:     1.0 [deg radius, stat+sys, 90% containment]
  EVENT_FLUX:      261.0 +- 0.0 [mCrab]
  EVENT_DATE:      17059 TJD;    37 DOY;   15/02/06
  EVENT_TIME:      52202.00 SOD {14:30:02.00} UT
  EVENT_TSCALE:    1s
  EVENT_EBAND:     High, 10-20 keV
  SUN_POSTN:       319.97d {+21h 19m 54s}  -15.58d {-15d 34' 44"}
  SUN_DIST:         58.80 [deg] 
  MOON_POSTN:      166.94d {+11h 07m 47s}   +3.35d {+03d 20' 46"}
  MOON_DIST:       117.83 [deg] 
  MOON_ILLUM:      94 [%] 
  GAL_COORDS:      305.05,-53.90 [deg] galactic lon,lat of the burst (or transient)      
  ECL_COORDS:      327.54,-58.24 [deg] ecliptic lon,lat of the burst (or transient)      
  COMMENTS:        MAXI Unknown Source Position. GRB or unknown X-ray Transient.
  

• GCN Circular #17414
  H. Negoro (Nihon U.), S. Ueno, H. Tomida, S. Nakahira, M. Kimura, M. Ishikawa, Y. E. Nakagawa (JAXA), T. Mihara, M. Sugizaki, M. Serino, M. Morii, J. Sugimoto, T. Takagi, A. Yoshikawa, M. Matsuoka (RIKEN), N. Kawai, T. Yoshii, Y. Tachibana (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo, H. Ohtsuki (AGU), H. Tsunemi, D. Uchida (Osaka U.), M. Nakajima, K. Fukushima, T. Onodera, K. Suzuki, M. Fujita, F. Honda, T. Namba (Nihon U.), Y. Ueda, M. Shidatsu, T. Kawamuro, T. Hori (Kyoto U.), Y. Tsuboi, A. Kawagoe (Chuo U.), M. Yamauchi, Y. Morooka, D. Itoh (Miyazaki U.), K. Yamaoka (Nagoya U.) report on behalf of the MAXI team:
  We report the MAXI/GSC detection of GRB 150206A (Hagen et al. GCN 17413) in the scan transit at 14:50 on 2015 February 06 UT, about 20 min after the BAT trigger.
  Assuming that the source flux was constant over the transit, we obtain the source position at
  (R.A., Dec) = (10.174 deg, -63.382 deg) = (00 40 41, -63 22 55) (J2000)
  with a statistical 90% C.L. elliptical error region with long and short radii of 0.34 deg and 0.28 deg respectively. The roll angle of long axis from the north direction is 82.0 deg counterclockwise. There is an additional systematic uncertainty of 0.1 deg (90% containment radius). The position is consistent with that of GRB 150206A.
  The X-ray flux averaged over the scan was 116 +- 25 mCrab (4-10keV, 1 sigma error). There was no significant excess flux in the previous transit at UT 13:21 with an upper limit of 20 mCrab.
• GCN Circular #17418
  M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
  Using 3576 s of XRT Photon Counting mode data and 11 UVOT images for GRB 150206A, 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 = 10.07362, -63.18223 which is equivalent to:

  RA (J2000): 00h 40m 17.67s
  Dec (J2000): -63d 10' 56.0"
  

  with an uncertainty of 1.4 arcsec (radius, 90% confidence).
  This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
  This circular was automatically generated, and is an official product of the Swift-XRT team.
• GCN Circular #17419
  T. Schweyer (MPE Garching), S. Schmidl (TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team:
  We observed the field of GRB 150206A (Swift trigger 630019; Hagen et al., GCN 17413) 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 00:32 UT on February 07, 2015, 10 hrs after the GRB trigger. They were performed at an average seeing of 1.4" and at an average airmass of 1.7.
  We detect the optical aftergow canditate reported by Hagen et al. (GCN 17413).
  Based on total exposures of 8.8 minutes in g'r'i'z' and 8.0 minutes in JHK, at a midtime of 10.3 hrs after the burst, we measure the following preliminary magnitudes and upper limits (all AB magnitude system):

  g' = 22.6 +/- 0.2 mag,
  r' = 21.9 +/- 0.1 mag,
  i' = 21.2 +/- 0.1 mag,
  z' = 20.8 +/- 0.1 mag,
  J = 20.0 +/- 0.2 mag,
  H > 20.2 mag, and
  K > 19.4 mag.
  

  The magnitudes are calibrated against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V)= 0.02 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #17420
  T. Kruehler (ESO Chile), D. Xu, J. P. U. Fynbo, D. Malesani (DARK/NBI), Z. Cano (U. Iceland), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI) report on behalf of a larger collaboration:
  We observed the afterglow of GRB 150206A (Hagen et al. GCN 17413) with the VLT/X-shooter spectrograph, equipped with the UVB/VIS/NIR arms and covering the wavelength range 3000-25000 AA. In a 4x600 s spectrum we detect absorption features of ZnII, FeII, and MgII at a common redshift of z=2.087. The spectral trace is down to ~3760 AA, being consistent with a Lya feature at the same redshift. We thus think this is the redshift of the GRB.
  We acknowledge excellent support from the observing staff at Paranal, in particular Dimitri Gadotti.
• GCN Circular #17423
  B. Sbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), V. Mangano (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC) and L.M.Z. Hagen report on behalf of the Swift-XRT team:
  We have analysed 8.9 ks of XRT data for GRB 150206A (Hagen et al. GCN Circ. 17413), from 464 s to 47.9 ks after the BAT trigger. The data comprise 1.1 ks in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN Circ. 17418).
  The late-time light curve (from T0+6.4 ks) can be modelled with a power-law decay with a decay index of alpha=2.7 (+1.0, -1.2).
  A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.69 (+0.08, -0.07). The best-fitting absorption column is 2.4 (+0.4, -0.3) x 10^21 cm^-2, in excess of the Galactic value of 2.3 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.85 (+0.08, -0.07) and a best-fitting absorption column of 9.6 (+2.1, -2.0) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.2 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     9.6 (+2.1, -2.0) x 10^20 cm^-2
  Galactic foreground: 2.3 x 10^20 cm^-2
  Excess significance: 6.0 sigma
  Photon index:	     1.85 (+0.08, -0.07)
  

  If the light curve continues to decay with a power-law decay index of 2.7, the count rate at T+24 hours will be 2.2 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.0 x 10^-14 (9.4 x 10^-14) erg cm^-2 s^-1.
  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00630019.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #17424
  S. R. Oates (IAA-CSIC/UCL-MSSL) and L. M. Z. Hagen (PSU) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 150206A 483 s after the BAT trigger (Hagen et al., GCN Circ. 17413). A source consistent with the XRT position (Goad et al. GCN Circ. 17418) is detected in the initial UVOT exposures.
  The preliminary UVOT position is:

   RA  (J2000) =  00:40:17.63 =  10.07346 (deg.)
   Dec (J2000) = -63:10:55.7  = -63.18214 (deg.)
  

  with an estimated uncertainty of 0.52 arc sec. (radius, 90% confidence).
  Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:

  Filter         T_start(s)   T_stop(s)      Exp(s)           Mag
  
  white              483          577           93         18.76 +/- 0.17
  v                 2091         6690          201        >18.8
  b                 2190         2912          255         19.56 +/- 0.22
  u                 2165         2707           78        >19.0
  w1                2140         2683           78        >18.9
  w2                2414         6560          216        >19.7
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #17426
  S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), L. M. Z. Hagen (PSU), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
  Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 150206A (trigger #630019) (Hagen, et al., GCN Circ. 17413). The BAT ground-calculated position is RA, Dec = 10.076, -63.181 deg, which is RA(J2000) = 00h 40m 18.1s Dec(J2000) = -63d 10' 50.8" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 48%.
  The mask-weighted light curve shows a slowly rising level starting at ~T-15 sec, with two strong clusters of peaks at ~T+85 and ~T+98 sec, and returning to baseline at ~T+230 sec. T90 (15-350 keV) is 83.2 +- 7.8 sec (estimated error including systematics).
  The time-averaged spectrum from T-22.3 to T+164.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.33 +- 0.04. The fluence in the 15-150 keV band is 1.39 +- 0.03 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+98.82 sec in the 15-150 keV band is 10.1 +- 0.4 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
  The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/630019/BA/
• GCN Circular #17427
  S. Golenetskii, R. Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report:
  The long-duration GRB 150206A (Swift BAT trigger 630019: Hagen et al., GCN 17413; Barthelmy et al., GCN 17426; MAXI/GSC detection: Negoro et al., GCN 17414) triggered Konus-Wind at T0=52280.265 s UT (14:31:20.265).
  The burst light curve shows a broad, multi-peaked pulse with a total duration of ~60 s. The emission is seen up to ~10 MeV.
  The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB150206_T52280/
  As observed by Konus-Wind, the burst had a fluence of 5.52(-0.64,+0.69)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+4.320 s, of 7.92(-1.78,+1.83)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
  The time-averaged spectrum of the burst (measured from T0 to T0+32.256 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.73(-0.14,+0.18), the high energy photon index beta = -2.20(-0.22,+0.15), the peak energy Ep = 228(-35,+37) keV (chi2 = 74/97 dof)
  The spectrum near the maximum count rate (measured from T0 to T0+7.680 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.48(-0.17,+0.21), the high energy photon index beta = -2.20(-0.22,+0.15), the peak energy Ep = 242(-35,+38) keV (chi2 = 84/90 dof)
  Assuming the redshift z=2.087 (Kruehler et al., GCN 17420) and a standard cosmology model with H_0 = 70 km/s/Mpc, Omega_M = 0.27, and Omega_Lambda = 0.73, we estimate the following rest-frame parameters: the isotropic energy release E_iso is 6.0(-0.7,+0.8)x10^53 erg, the peak luminosity L_iso is 2.7(-0.6,+0.6)x10^53 erg/s, and the rest-frame peak energy of the time-integrated spectrum, Ep,i, is 703(-109,+114) keV.
  All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.