Gamma-ray Burst 100213B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 22:59:18 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     412220,   Seg_Num: 0
  GRB_RA:          124.338d {+08h 17m 21s} (J2000),
                   124.511d {+08h 18m 03s} (current),
                   123.478d {+08h 13m 55s} (1950)
  GRB_DEC:         +43.455d {+43d 27' 19"} (J2000),
                   +43.423d {+43d 25' 24"} (current),
                   +43.611d {+43d 36' 38"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       17731 [cnts]    Image_Peak=516 [image_cnts]
  TRIGGER_DUR:     4.096 [sec] 
  TRIGGER_INDEX:   298     E_range: 25-100 keV
  BKG_INTEN:       152365 [cnts]
  BKG_TIME:        82658.47 SOD {22:57:38.47} UT
  BKG_DUR:         40 [sec]
  GRB_DATE:        15240 TJD;    44 DOY;   10/02/13
  GRB_TIME:        82714.21 SOD {22:58:34.21} UT
  GRB_PHI:          15.79 [deg]
  GRB_THETA:        35.03 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.18 [sigma]
  IMAGE_SIGNIF:    10.85 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +2  +2  +0  +0  +0 +80  +0 
  SUN_POSTN:       327.41d {+21h 49m 39s}  -13.14d {-13d 08' 32"}
  SUN_DIST:        143.88 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.75d {+21h 39m 00s}  -11.11d {-11d 06' 42"}
  MOON_DIST:       143.24 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.92, 33.38 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      116.44, 23.12 [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 = 53.56,-8.15 [deg].  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 23:01:39 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     412220,   Seg_Num: 0
  GRB_RA:          124.2858d {+08h 17m 08.59s} (J2000),
                   124.4595d {+08h 17m 50.27s} (current),
                   123.4257d {+08h 13m 42.16s} (1950)
  GRB_DEC:         +43.4473d {+43d 26' 50.2"} (J2000),
                   +43.4155d {+43d 24' 55.7"} (current),
                   +43.6024d {+43d 36' 08.6"} (1950)
  GRB_ERROR:       5.2 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.75e-09 [erg/cm2/sec]
  GRB_SIGNIF:      7.48 [sigma]
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82863.73 SOD {23:01:03.73} UT,   149.5 [sec] since BAT Trigger Time
  TAM[0-3]:        327.66 237.22 261.49 243.69
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:       327.41d {+21h 49m 39s}  -13.14d {-13d 08' 30"}
  SUN_DIST:        143.86 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.77d {+21h 39m 05s}  -11.10d {-11d 06' 15"}
  MOON_DIST:       143.21 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.93, 33.34 [deg] galactic lon,lat of the burst
  ECL_COORDS:      116.40, 23.10 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        The XRT position is 2.30 arcmin from the BAT position.  
  COMMENTS:        WARNING: The centroided position is more than 100 rows or columns from the center of the FOV.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 23:01:50 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     412220,   Seg_Num: 0
  GRB_RA:          124.2858d {+08h 17m 08.5s} (J2000),
                   124.4595d {+08h 17m 50.2s} (current),
                   123.4257d {+08h 13m 42.1s} (1950)
  GRB_DEC:         +43.4473d {+43d 26' 50.2"} (J2000),
                   +43.4155d {+43d 24' 55.7"} (current),
                   +43.6024d {+43d 36' 08.6"} (1950)
  GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       56 [cnts]
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82863.73 SOD {23:01:03.73} UT,   149.5 [sec] since BAT Trigger Time
  CENTROID_X:      208.29,  raw= 208  [pixels]
  CENTROID_Y:      400.30,  raw= 400  [pixels]
  ROLL:            319.78 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   241.17
  GRB_POS_XRT_Z:   -221.60
  IMAGE_URL:       sw00412220000msxps_rw.img
  SUN_POSTN:       327.41d {+21h 49m 39s}  -13.14d {-13d 08' 30"}
  SUN_DIST:        143.86 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.77d {+21h 39m 05s}  -11.10d {-11d 06' 13"}
  MOON_DIST:       143.21 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.93, 33.34 [deg] galactic lon,lat of the burst
  ECL_COORDS:      116.40, 23.10 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.  
  COMMENTS:        WARNING: The centroided position is more than 100 rows or columns from the center of the FOV.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 23:01:54 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     412220,   Seg_Num: 0
  GRB_RA:          124.2858d {+08h 17m 08.5s} (J2000),
                   124.4595d {+08h 17m 50.2s} (current),
                   123.4257d {+08h 13m 42.1s} (1950)
  GRB_DEC:         +43.4473d {+43d 26' 50.2"} (J2000),
                   +43.4155d {+43d 24' 55.7"} (current),
                   +43.6024d {+43d 36' 08.6"} (1950)
  GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       56 [cnts]
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82863.73 SOD {23:01:03.73} UT,   149.5 [sec] since BAT Trigger Time
  CENTROID_X:      208.29,  raw= 208  [pixels]
  CENTROID_Y:      400.30,  raw= 400  [pixels]
  ROLL:            319.78 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   241.17
  GRB_POS_XRT_Z:   -221.60
  IMAGE_URL:       sw00412220000msxps_rw.img
  SUN_POSTN:       327.41d {+21h 49m 39s}  -13.14d {-13d 08' 30"}
  SUN_DIST:        143.86 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.77d {+21h 39m 05s}  -11.10d {-11d 06' 12"}
  MOON_DIST:       143.21 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.93, 33.34 [deg] galactic lon,lat of the burst
  ECL_COORDS:      116.40, 23.10 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 23:02:27 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     412220,   Seg_Num: 0
  GRB_RA:          124.338d {+08h 17m 21s} (J2000),
                   124.511d {+08h 18m 03s} (current),
                   123.478d {+08h 13m 55s} (1950)
  GRB_DEC:         +43.455d {+43d 27' 19"} (J2000),
                   +43.423d {+43d 25' 24"} (current),
                   +43.611d {+43d 36' 38"} (1950)
  GRB_DATE:        15240 TJD;    44 DOY;   10/02/13
  GRB_TIME:        82714.21 SOD {22:58:34.21} UT
  TRIGGER_INDEX:   298
  GRB_PHI:          15.79 [deg]
  GRB_THETA:        35.03 [deg]
  DELTA_TIME:      26.00 [sec]
  TRIGGER_DUR:     4.096 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.18 [sigma]
  IMAGE_SIGNIF:    10.85 [sigma]
  LC_URL:          sw00412220000msb.lc
  SUN_POSTN:       327.41d {+21h 49m 40s}  -13.14d {-13d 08' 30"}
  SUN_DIST:        143.88 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.78d {+21h 39m 06s}  -11.10d {-11d 06' 05"}
  MOON_DIST:       143.22 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.92, 33.38 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      116.44, 23.12 [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 = 53.56,-8.15 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 23:03:06 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     412220,   Seg_Num: 0
  POINT_RA:        124.411d {+08h 17m 39s} (J2000)
  POINT_DEC:       +43.444d {+43d 26' 38"} (J2000)
  POINT_ROLL:      319.781d
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82871.91 SOD {23:01:11.91} UT,   157.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.285
  N_STARS:         18
  X_OFFSET:        633 [pixels]
  Y_OFFSET:        192 [pixels]
  X_MAX:           1592 [pixels]
  Y_MAX:           1151 [pixels]
  DET_THRESH:      10
  PHOTO_THRESH:    5
  SL_URL:          sw00412220000msufc0157.fits
  SUN_POSTN:       327.42d {+21h 49m 40s}  -13.14d {-13d 08' 29"}
  SUN_DIST:        143.92 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.78d {+21h 39m 07s}  -11.10d {-11d 05' 58"}
  MOON_DIST:       143.26 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.95, 33.43 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      116.50, 23.12 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 23:03:34 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     412220,   Seg_Num: 0
  POINT_RA:        124.411d {+08h 17m 39s} (J2000)
  POINT_DEC:       +43.444d {+43d 26' 38"} (J2000)
  POINT_ROLL:      319.781d
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82871.91 SOD {23:01:11.91} UT,   157.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.285
  N_STARS:         18
  X_OFFSET:        633 [pixels]
  Y_OFFSET:        192 [pixels]
  X_MAX:           1592 [pixels]
  Y_MAX:           1151 [pixels]
  DET_THRESH:      10
  PHOTO_THRESH:    5
  SL_URL:          sw00412220000msufc0157.fits
  SUN_POSTN:       327.42d {+21h 49m 40s}  -13.14d {-13d 08' 29"}
  SUN_DIST:        143.92 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.78d {+21h 39m 08s}  -11.10d {-11d 05' 52"}
  MOON_DIST:       143.25 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.95, 33.43 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      116.50, 23.12 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 13 Feb 10 23:04:14 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     412220,   Seg_Num: 0
  POINT_RA:        124.411d {+08h 17m 39s} (J2000)
  POINT_DEC:       +43.444d {+43d 26' 38"} (J2000)
  ROLL:            319.781d
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82871.91 SOD {23:01:11.91} UT,   157.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     287794877
  X_OFFSET:        953 [pixels]
  Y_OFFSET:        235 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1113
  Y_GRB_POS:       395
  BINNING_INDEX:   1
  IM_URL:          sw00412220000msuni0163.fits
  SUN_POSTN:       327.42d {+21h 49m 40s}  -13.14d {-13d 08' 28"}
  SUN_DIST:        143.92 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.79d {+21h 39m 10s}  -11.10d {-11d 05' 44"}
  MOON_DIST:       143.25 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.95, 33.43 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      116.50, 23.12 [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:     Sat 13 Feb 10 23:04:45 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     412220,   Seg_Num: 0
  POINT_RA:        124.411d {+08h 17m 39s} (J2000)
  POINT_DEC:       +43.444d {+43d 26' 38"} (J2000)
  ROLL:            319.781d
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82871.91 SOD {23:01:11.91} UT,   157.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     287794877
  X_OFFSET:        953 [pixels]
  Y_OFFSET:        235 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1113
  Y_GRB_POS:       395
  BINNING_INDEX:   1
  IM_URL:          sw00412220000msuni0163.fits
  SUN_POSTN:       327.42d {+21h 49m 40s}  -13.14d {-13d 08' 28"}
  SUN_DIST:        143.92 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.79d {+21h 39m 11s}  -11.09d {-11d 05' 38"}
  MOON_DIST:       143.25 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.95, 33.43 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      116.50, 23.12 [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:     Sat 13 Feb 10 23:03:06 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     412220,   Seg_Num: 0
  POINT_RA:        124.411d {+08h 17m 39s} (J2000)
  POINT_DEC:       +43.444d {+43d 26' 38"} (J2000)
  POINT_ROLL:      319.781d
  IMG_START_DATE:  15240 TJD;    44 DOY;   10/02/13
  IMG_START_TIME:  82871.91 SOD {23:01:11.91} UT,   157.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.285
  N_STARS:         18
  X_OFFSET:        633 [pixels]
  Y_OFFSET:        192 [pixels]
  X_MAX:           1592 [pixels]
  Y_MAX:           1151 [pixels]
  DET_THRESH:      10
  PHOTO_THRESH:    5
  SL_URL:          sw00412220000msufc0157.fits
  SUN_POSTN:       327.42d {+21h 49m 40s}  -13.14d {-13d 08' 29"}
  SUN_DIST:        143.92 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
  MOON_POSTN:      324.78d {+21h 39m 07s}  -11.10d {-11d 05' 58"}
  MOON_DIST:       143.26 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      176.95, 33.43 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      116.50, 23.12 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN Circular #10412
  L. Vetere (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), J. M. Gelbord (PSU), D. Grupe (PSU), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), T. Sakamoto (NASA/UMBC), M. H. Siegel (PSU), M. C. Stroh (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
  At 22:58:34 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100213B (trigger=412220). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 124.338, +43.455 which is

     RA(J2000)  =  08h 17m 21s
     Dec(J2000) = +43d 27' 19"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a FRED-like pulse structure with a duration of about 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~2 sec after the trigger.
  The XRT began observing the field at 23:01:03.7 UT, 149.5 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 124.2858, +43.4473 which is equivalent to:

     RA(J2000)  = 08h 17m 08.59s
     Dec(J2000) = +43d 26' 50.2"
  

  with an uncertainty of 5.2 arcseconds (radius, 90% containment). 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 1.75e-09 erg cm^-2 s^-1 (0.2-10 keV).
  UVOT took a finding chart exposure of 77 seconds with the White filter starting 157 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The 3-sigma upper limit is about 20.5 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.08.
  Burst Advocate for this burst is L. Vetere (vetere AT astro.psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
• GCN Circular #10413
  D. Malesani (DARK/NBI), N.R. Tanvir (Univ. Leicester), D. Xu (WIS, DARK/NBI), G. Leloudas (DARK/NBI), P. Jakobsson (Univ. Iceland), A. Somero, and S. Katajainen (Tuorla Obs.), report on behalf of a larger collaboration:
  We observed the field of GRB 100213B (Vetere et al., GCN 10412) with the NOT equipped with ALFOSC. Due to adverse weather, we could only obtain one 5-min R-band exposure, starting on Feb 13.970 UT (19 min after the GRB).
  We find an object with R ~ 21.5 located just outside the edge of the XRT error circle, at coordinates RA = 08:17:07.97, Dec = +43:26:54.6. This location is 8 arcsec away of the X-ray position, which has a reported error radius of 5.2" (Vetere et al., GCN 10412). The object seems elongated in our image. However, it is not visible in the SDSS data of this field, and may therefore be the afterglow of GRB 100213B.
  Inside the XRT error circle, there is also a possible source close to our image detection limit (R ~ 22.2), at coordinates RA = 08:17:08.48, Dec = +43:26:50.3 (0.8" uncertainty). Given the low S/N, the reality of this source cannot be confirmed.
  Further observations are encouraged. The NOT may attempt again later tonight depending on the weather conditions.
• GCN Circular #10416
  L. Vetere (PSU) reports on behalf of the Swift-XRT team:
  We have analysed 1.7 ks of XRT data for GRB 100213B (Vetere et al. GCN Circ. 10412), from 155 s to 5.7 ks after the BAT trigger. The data comprise 500 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. Using 1.2ks of XRT Photon Counting mode data we find a refined XRT position: RA, Dec = 124.28384, 43.44683 which is equivalent to:

  RA (J2000): 08h 17m 08.12s
  Dec (J2000): +43d 26' 48.6"
  

  with an uncertainty of 4.9 arcsec (radius, 90% confidence).
  The light curve can be modelled with a power-law decay with a decay index of alpha=2.06 (+0.10, -0.08). A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.47 (+/-0.12). The best-fitting absorption column is 1.3 (+0.4, -0.3) x 10^21 cm^-2, in excess of the Galactic value of 5.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.9 x 10^-11 (5.6 x 10^-11) erg cm^-2 count^-1.
  If the light curve continues to decay with a power-law decay index of 2.06, the count rate at T+24 hours will be 6.9 x 10^-5 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 3.4 x 10^-15 (3.9 x 10^-15) erg cm^-2 s^-1.
  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00412220.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #10417
  S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU), L. Vetere (PSU) (i.e. the Swift-BAT team):
  Using the data set from T-61 to T+242 sec from recent telemetry downlinks, we report further analysis of BAT GRB 100213B (trigger #412220) (Vetere, et al., GCN Circ. 10412). The BAT ground-calculated position is RA, Dec = 124.320, 43.464 deg which is

     RA(J2000)  =  08h 17m 16.8s 
     Dec(J2000) = +43d 27' 51.7" 
  

  with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 56%.
  The mask-weighted light curve shows a FRED-like pulse starting at ~T-5 sec, peaking at ~T+5 sec, and ending at ~T+150 sec. Because the burst goes out of the BAT FOV at T+250 sec (due to an observing constraint), we can not tell if there if any detectable activity past T+250 sec. T90 (15-350 keV) is 48.0 +- 16.0 sec (estimated error including systematics).
  The time-averaged spectrum from T-12.7 to T+35.3 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.13 +- 0.61, and Epeak of 39.1 +- 8.8 keV (chi squared 58.8 for 56 d.o.f.). The 1-sec peak flux measured from T+10.76 sec in the 15-150 keV band is 0.5 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 2.04 +- 0.13 (chi squared 67.0 for 57 d.o.f.). 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/412220/BA/
• GCN Circular #10419
  A. N. Morgan, B. E. Cobb, C. R. Klein, J. S. Bloom (UC Berkeley), report:
  We observed the field of GRB 100213B (Vetere et al., GCN 10412) with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began under good weather conditions at 2010-02-14 02:53:48 UT, ~3.92 hours after the Swift trigger. In mosaics (effective exposure time of ~2387 seconds) taken simultaneously in the J, H, and Ks filters, we do not detect any sources within the XRT error circle, nor at the potential NOT position (Malesani et al., GCN 10413).
  The preliminary photometry yields:

  post_burst
  t_mid(h)    exp(s)  filt    U. Limit (3 sig)
  4.44        2387    J       > 19.2
  4.44        2387    H       > 18.2
  4.44        2387    Ks      > 17.1
  

  Observations are ongoing. All magnitudes given in the Vega system, calibrated to 2MASS. No correction for Galactic extinction has been made to the above reported values.
• GCN Circular #10421
  P.A. Curran (MSSL-UCL) and L. Vetere (PSU) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 100213B 158 s after the BAT trigger (Vetere et al., GCN 10412). No optical afterglow consistent with the XRT position (Vetere et al., GCN 10416) or the NOT R-band position (Malesani et al., GCN 10413) is detected in the initial UVOT exposures.
  Preliminary 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the initial exposures are:

  Filter     T_start(s)   T_stop(s)   Exp(s)   Mag
  --------------------------------------------------
  white      158          4654        273      >21.17
  v          3430         5065        393      >19.64
  b          4250         5722        233      >20.38
  u          4044         5679        393      >20.38
  w1         3840         5475        393      >20.31
  m2         3634         5269        393      >21.10
  w2         4660         4860        197      >20.00
  

  The values quoted above 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 #10422
  A. Cucchiara (PSU), R. Chornock (Harvard),D. B. Fox (PSU), E. Berger (Harvard), report on behalf of a larger collaboration:
  "We observed the field of GRB 100213B (Vetere et al., GCN 10412) with GMOS on the Gemini-North 8-m telescope starting on 2010 Feb 14.24 (~7 hours after the burst).
  Inside the refined XRT error circle (GCN #10416) we detect no new sources in a 2 min r-band acquisition image. Outside the XRT error circle we clearly detect the source reported by Malesani et al. (GCN #10413).
  We then obtain 2x1200s spectra on this source at central wavelength 8000A. We detect [OII]3727, H-beta and [OIII]5007 at the common redshift of z =0.604. At this point is not clear whether this object is related to GRB 100213B.
  We thank the Gemini staff for performing this observation, in particular Tom Geballe."
• GCN Circular #10423
  P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team.
  Using 819 s of XRT Photon Counting mode data and 1 UVOT image for GRB 100213B, 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 = 124.28226, +43.44773 which is equivalent to:

  RA (J2000): 08h 17m 7.74s
  Dec (J2000): +43d 26' 51.8"
  

  with an uncertainty of 3.5 arcsec (radius, 90% confidence). This position is 3.7" from the object reported by Malesani et al. (GCN Circ. 10413) and Cucchiara et al (GCN Circ. 10422).
  Position enhancement 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 #10426
  T. Sakamoto (UMBC/GSFC), D. Donato (ORAU/GSFC), N. Gehrels (GSFC), T. Okajima (JHU/GSFC), Y. Urata (NCU), C.A. Wallace (FGCU)
  We observed the field of GRB 100213B detected by Swift (trigger #412220; Vetere et al., GCN Circ. 10412) with the 14-inch Goddard Robotic Telescope (GRT) located at the Goddard Geophysical and Astronomical Observatory (http://cddisa.gsfc.nasa.gov/ggao/).
  Total 59 images of 60 sec exposures were taken in the R filter starting from February 13 23:55:15 (UT) about 0.94 hours after the trigger and stopped on February 14 01:50:46 (UT). We do not detect the optical afterglow both in the individual images and the combined image inside the XRT position (Evans, GCN #10423). The estimated three sigma upper limit of the combined image (total exposure of 3540 sec) is ~18.7 mag using the USNO-B1 catalog.
• GCN Circular #10446
  GRB 100213B R band observations
  J. Kelemen (kelemen at konkoly.hu) on behalf of the GRB OT observing program at the Konkoly Observatory.
  On 15 february 2010 19:56:20 UT we observed the field of GRB 100213B detected by Swift (trigger #412220; Vetere et al., GCN 10412) with a 60/90 cm Schmidt telescope located at the Mountain Station of the Konkoly Observatory using R filter. The total exposure of the coadded images were 2700 s. We examined both the XRT position and the position reported D. Malesani et al. GCN 10413. No new object brighter than 21.3 +/- 0.2 was found.

    
  Time     Mag     Error.      Flag.
  [s]     [R]    [1-sigma]
  ------------------------------------- 
  161866   21.30   0.2      Upper Limit 
  ------------------------------------- 
  

  This message can be cited.
• GCN Circular #10454
  E. Klunko (ISTP), A. Volnova (SAI MSU), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report:
  We observed the field of GRB 100213B (Vetere et al., GCN 10412) with AZT-33IK telescope of Sayan observatory (Mondy) starting Feb. 14 (UT) 14:54:31. We do not detect any sources in enhanced XRT error circle (Evans, GCN 10423). The upper limit (3 sigma) of stacked image is based on USNO-B1.0 nearby stars:

  T0+      Filter,   Exposure,   mag.
  (mid, d)             (s)
  
  0.6801   R       94x30     > 20.80
  

• GCN Circular #10913
  Y. Li, J. Weston, X. Fernandez, A. Brown, J. H. Yoon, A. P. S. Crotts, and J. P. Halpern (Columbia U.) report on behalf of the graduate Observational Astronomy class:
  "We obtained R-band images of the field of Swift GRB 100213B (Vetere et al., GCN 10412) on two consecutive, photometric nights using the MDM 1.3m telescope, for total exposure times of 30 and 40 minutes, respectively. Within 3.8" of the enhanced Swift XRT afterglow position (of 90% confidence radius 3.5", Evans, GCN 10423), we find a fading object at
  (J2000) R.A. = 08h 17m 07.94s, Decl. = +43d 26' 54.94"
  with positional uncertainty ~0.5", and the following magnitudes:

      ----------------------------------------------------------
       Date(UT)  Mid-time(UT) t-t0(hr)  Exp(min)      R(mag)
      ----------------------------------------------------------
       Feb. 14      03:44        4.8       30      22.00+/-0.14
       Feb. 15      03:35       28.6       40      23.01+/-0.24
      ----------------------------------------------------------
  

  Magnitudes are referenced to Landolt (1992) standard stars, and are not corrected for Galactic extinction.
  The position of the afterglow coincides with the R ~ 21.5 object detected by Malesani et al. (GCN 10413) 19 minutes after the GRB, and whose redshift z = 0.604 was measured by Cucchiara et al. (GCN 10422). We conclude that the observed variability and positional coincidence with an emission-line object establishes the optical afterglow and host galaxy redshift of GRB 100213B. Further observations of the host galaxy are encouraged.
  MDM images of the field are posted at
  http://www.astro.columbia.edu/~jules/grb/100213b/
  This message may be cited."