Gamma-ray Burst 110414A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:43:26 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     451343,   Seg_Num: 0
GRB_RA:           97.876d {+06h 31m 30s} (J2000),
                  98.049d {+06h 32m 12s} (current),
                  97.110d {+06h 28m 26s} (1950)
GRB_DEC:         +24.361d {+24d 21' 39"} (J2000),
                 +24.352d {+24d 21' 08"} (current),
                 +24.397d {+24d 23' 50"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       63557 [cnts]    Image_Peak=787 [image_cnts]
TRIGGER_DUR:     16.384 [sec] 
TRIGGER_INDEX:   374     E_range: 25-100 keV
BKG_INTEN:       232581 [cnts]
BKG_TIME:        27633.14 SOD {07:40:33.14} UT
BKG_DUR:         64 [sec]
GRB_DATE:        15665 TJD;   104 DOY;   11/04/14
GRB_TIME:        27734.52 SOD {07:42:14.52} UT
GRB_PHI:         -170.86 [deg]
GRB_THETA:        49.33 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     13.37 [sigma]
IMAGE_SIGNIF:    10.00 [sigma]
MERIT_PARAMS:     +1  +0  +0  +4  +2  +0  +0  +1 -28  +0 
SUN_POSTN:        22.24d {+01h 28m 58s}   +9.32d {+09d 19' 06"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.23d {+10h 04m 56s}   +6.82d {+06d 49' 28"}
MOON_DIST:        53.77 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.76 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       97.17,  1.12 [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 = 112.62,16.48 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:45:06 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     451343,   Seg_Num: 0
GRB_RA:           97.8743d {+06h 31m 29.83s} (J2000),
                  98.0470d {+06h 32m 11.28s} (current),
                  97.1087d {+06h 28m 26.08s} (1950)
GRB_DEC:         +24.3640d {+24d 21' 50.4"} (J2000),
                 +24.3553d {+24d 21' 19.0"} (current),
                 +24.4003d {+24d 24' 01.0"} (1950)
GRB_ERROR:       4.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       4.11e-09 [erg/cm2/sec]
GRB_SIGNIF:      11.35 [sigma]
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27876.80 SOD {07:44:36.80} UT,   142.3 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.22 261.58 243.54
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        22.24d {+01h 28m 58s}   +9.32d {+09d 19' 08"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.25d {+10h 05m 00s}   +6.82d {+06d 49' 05"}
MOON_DIST:        53.79 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.97,  6.76 [deg] galactic lon,lat of the burst
ECL_COORDS:       97.17,  1.12 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.20 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:     Thu 14 Apr 11 07:45:16 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     451343,   Seg_Num: 0
GRB_RA:           97.8743d {+06h 31m 29.8s} (J2000),
                  98.0470d {+06h 32m 11.2s} (current),
                  97.1087d {+06h 28m 26.0s} (1950)
GRB_DEC:         +24.3640d {+24d 21' 50.4"} (J2000),
                 +24.3553d {+24d 21' 19.0"} (current),
                 +24.4003d {+24d 24' 01.0"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       129 [cnts]
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27876.80 SOD {07:44:36.80} UT,   142.3 [sec] since BAT Trigger Time
CENTROID_X:      289.86,  raw= 290  [pixels]
CENTROID_Y:      296.04,  raw= 296  [pixels]
ROLL:            272.79 [deg]
GAIN:            2
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -4.61
GRB_POS_XRT_Z:   -29.30
IMAGE_URL:       sw00451343000msxps_rw.img
SUN_POSTN:        22.24d {+01h 28m 58s}   +9.32d {+09d 19' 08"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.25d {+10h 05m 00s}   +6.82d {+06d 49' 03"}
MOON_DIST:        53.79 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.97,  6.76 [deg] galactic lon,lat of the burst
ECL_COORDS:       97.17,  1.12 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:45:24 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     451343,   Seg_Num: 0
GRB_RA:           97.8743d {+06h 31m 29.8s} (J2000),
                  98.0470d {+06h 32m 11.2s} (current),
                  97.1087d {+06h 28m 26.0s} (1950)
GRB_DEC:         +24.3640d {+24d 21' 50.4"} (J2000),
                 +24.3553d {+24d 21' 19.0"} (current),
                 +24.4003d {+24d 24' 01.0"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       129 [cnts]
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27876.80 SOD {07:44:36.80} UT,   142.3 [sec] since BAT Trigger Time
CENTROID_X:      289.86,  raw= 290  [pixels]
CENTROID_Y:      296.04,  raw= 296  [pixels]
ROLL:            272.79 [deg]
GAIN:            2
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -4.61
GRB_POS_XRT_Z:   -29.30
IMAGE_URL:       sw00451343000msxps_rw.img
SUN_POSTN:        22.24d {+01h 28m 58s}   +9.32d {+09d 19' 08"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.25d {+10h 05m 00s}   +6.82d {+06d 49' 01"}
MOON_DIST:        53.79 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.97,  6.76 [deg] galactic lon,lat of the burst
ECL_COORDS:       97.17,  1.12 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:46:04 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     451343,   Seg_Num: 0
GRB_RA:           97.876d {+06h 31m 30s} (J2000),
                  98.049d {+06h 32m 12s} (current),
                  97.110d {+06h 28m 26s} (1950)
GRB_DEC:         +24.361d {+24d 21' 39"} (J2000),
                 +24.352d {+24d 21' 08"} (current),
                 +24.397d {+24d 23' 50"} (1950)
GRB_DATE:        15665 TJD;   104 DOY;   11/04/14
GRB_TIME:        27734.52 SOD {07:42:14.52} UT
TRIGGER_INDEX:   374
GRB_PHI:         -170.86 [deg]
GRB_THETA:        49.33 [deg]
DELTA_TIME:      -57.00 [sec]
TRIGGER_DUR:     16.384 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     13.37 [sigma]
IMAGE_SIGNIF:    10.00 [sigma]
LC_URL:          sw00451343000msb.lc
SUN_POSTN:        22.24d {+01h 28m 58s}   +9.32d {+09d 19' 09"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.26d {+10h 05m 02s}   +6.81d {+06d 48' 52"}
MOON_DIST:        53.80 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.76 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       97.17,  1.12 [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 = 112.62,16.48 [deg].

GCN Circular #11931
R. L. C. Starling (U Leicester), A. P. Beardmore (U Leicester), V. D'Elia (ASDC), P. A. Evans (U Leicester), J. M. Gelbord (PSU), B. Gendre (ASDC), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), A. Melandri (INAF-OAB), K. L. Page (U Leicester), A. Rowlinson (U Leicester), M. Stamatikos (OSU/NASA/GSFC), G. Stratta (ASDC) and G. Tagliaferri (INAF-OAB) report on behalf of the Swift Team:
At 07:42:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 110414A (trigger=451343). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 97.876, +24.361 which is
```
   RA(J2000) = 06h 31m 30s
   Dec(J2000) = +24d 21' 39"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed multiple-peaked structure with a duration of about 50 sec. The peak count rate was ~400 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 07:44:36.8 UT, 142.3 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source with an enhanced position: RA, Dec 97.8726, 24.3624 which is equivalent to:
```
   RA(J2000)  = 06h 31m 29.42s
   Dec(J2000) = +24d 21' 44.7"
```
with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 12 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.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 3.05 x 10^21 cm^-2 (Kalberla et al. 2005).
The initial flux in the 2.5 s image was 4.11e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of nominal 250 seconds with the U filter starting 308 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. Data from the 2.7'x2.7' sub-image are not available at this time. 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 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.33.
Burst Advocate for this burst is R. L. C. Starling (rlcs1 AT star.le.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:58:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.884d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
ROLL:            272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28043.04 SOD {07:47:23.04} UT,   308.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     324460049
X_OFFSET:        848 [pixels]
Y_OFFSET:        835 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       995
BINNING_INDEX:   1
IM_URL:          sw00451343000msuni0315.fits
SUN_POSTN:        22.25d {+01h 29m 00s}   +9.32d {+09d 19' 20"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.37d {+10h 05m 30s}   +6.77d {+06d 46' 01"}
MOON_DIST:        53.91 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 07:50:31 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.882d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.362d {+24d 21' 42"} (J2000)
ROLL:            272.786d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27884.80 SOD {07:44:44.80} UT,   150.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     324459891
X_OFFSET:        848 [pixels]
Y_OFFSET:        835 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       995
BINNING_INDEX:   1
IM_URL:          sw00451343000msuni0157.fits
SUN_POSTN:        22.25d {+01h 28m 59s}   +9.32d {+09d 19' 13"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.30d {+10h 05m 12s}   +6.80d {+06d 47' 50"}
MOON_DIST:        53.83 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 07:58:04 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.884d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
ROLL:            272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28043.04 SOD {07:47:23.04} UT,   308.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     324460049
X_OFFSET:        848 [pixels]
Y_OFFSET:        835 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       995
BINNING_INDEX:   1
IM_URL:          sw00451343000msuni0315.fits
SUN_POSTN:        22.25d {+01h 29m 00s}   +9.32d {+09d 19' 19"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.37d {+10h 05m 29s}   +6.77d {+06d 46' 05"}
MOON_DIST:        53.91 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 08:03:49 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.885d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
POINT_ROLL:      272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28597.45 SOD {07:56:37.45} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.352
N_STARS:         190
X_OFFSET:        288 [pixels]
Y_OFFSET:        275 [pixels]
X_MAX:           1727 [pixels]
Y_MAX:           1714 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00451343000msufc0862.fits
SUN_POSTN:        22.25d {+01h 29m 01s}   +9.32d {+09d 19' 25"}
SUN_DIST:         73.30 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.43d {+10h 05m 42s}   +6.75d {+06d 44' 45"}
MOON_DIST:        53.97 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 08:04:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.885d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
POINT_ROLL:      272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28597.45 SOD {07:56:37.45} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.352
N_STARS:         190
X_OFFSET:        288 [pixels]
Y_OFFSET:        275 [pixels]
X_MAX:           1727 [pixels]
Y_MAX:           1714 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00451343000msufc0862.fits
SUN_POSTN:        22.26d {+01h 29m 01s}   +9.32d {+09d 19' 25"}
SUN_DIST:         73.30 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.43d {+10h 05m 43s}   +6.74d {+06d 44' 40"}
MOON_DIST:        53.97 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 08:05:25 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.885d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
ROLL:            272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28597.45 SOD {07:56:37.45} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     324460604
X_OFFSET:        847 [pixels]
Y_OFFSET:        834 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       994
BINNING_INDEX:   1
IM_URL:          sw00451343000msuni0869.fits
SUN_POSTN:        22.26d {+01h 29m 01s}   +9.32d {+09d 19' 26"}
SUN_DIST:         73.30 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.44d {+10h 05m 46s}   +6.74d {+06d 44' 22"}
MOON_DIST:        53.98 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 08:05:40 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.885d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
ROLL:            272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28597.45 SOD {07:56:37.45} UT,   862.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     324460604
X_OFFSET:        847 [pixels]
Y_OFFSET:        834 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1007
Y_GRB_POS:       994
BINNING_INDEX:   1
IM_URL:          sw00451343000msuni0869.fits
SUN_POSTN:        22.26d {+01h 29m 01s}   +9.32d {+09d 19' 26"}
SUN_DIST:         73.30 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.44d {+10h 05m 46s}   +6.74d {+06d 44' 19"}
MOON_DIST:        53.99 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:48:57 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.882d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.362d {+24d 21' 42"} (J2000)
POINT_ROLL:      272.786d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27884.80 SOD {07:44:44.80} UT,   150.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.447
N_STARS:         190
X_OFFSET:        512 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      20
PHOTO_THRESH:    12
SL_URL:          sw00451343000msufc0150.fits
SUN_POSTN:        22.25d {+01h 28m 59s}   +9.32d {+09d 19' 11"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.29d {+10h 05m 09s}   +6.80d {+06d 48' 12"}
MOON_DIST:        53.82 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:57:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.884d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
POINT_ROLL:      272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28043.04 SOD {07:47:23.04} UT,   308.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.580
N_STARS:         146
X_OFFSET:        528 [pixels]
Y_OFFSET:        515 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1474 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00451343000msufc0308.fits
SUN_POSTN:        22.25d {+01h 29m 00s}   +9.32d {+09d 19' 18"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.36d {+10h 05m 27s}   +6.77d {+06d 46' 19"}
MOON_DIST:        53.90 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 07:49:30 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.882d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.362d {+24d 21' 42"} (J2000)
POINT_ROLL:      272.786d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27884.80 SOD {07:44:44.80} UT,   150.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.447
N_STARS:         190
X_OFFSET:        512 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1471 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      20
PHOTO_THRESH:    12
SL_URL:          sw00451343000msufc0150.fits
SUN_POSTN:        22.25d {+01h 28m 59s}   +9.32d {+09d 19' 12"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.29d {+10h 05m 10s}   +6.80d {+06d 48' 04"}
MOON_DIST:        53.82 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 07:50:49 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.882d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.362d {+24d 21' 42"} (J2000)
ROLL:            272.786d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27884.80 SOD {07:44:44.80} UT,   150.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     324459891
X_OFFSET:        848 [pixels]
Y_OFFSET:        835 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       995
BINNING_INDEX:   1
IM_URL:          sw00451343000msuni0157.fits
SUN_POSTN:        22.25d {+01h 28m 59s}   +9.32d {+09d 19' 13"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.30d {+10h 05m 13s}   +6.80d {+06d 47' 46"}
MOON_DIST:        53.84 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.76 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [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:     Thu 14 Apr 11 07:57:10 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     451343,   Seg_Num: 0
GRB_RA:           97.8726d {+06h 31m 29.42s} (J2000),
                  98.0453d {+06h 32m 10.87s} (current),
                  97.1070d {+06h 28m 25.67s} (1950)
GRB_DEC:         +24.3624d {+24d 21' 44.6"} (J2000),
                 +24.3537d {+24d 21' 13.3"} (current),
                 +24.3987d {+24d 23' 55.2"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  27964.00 SOD {07:46:04.00} UT,   229.5 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        22.25d {+01h 29m 00s}   +9.32d {+09d 19' 19"}
SUN_DIST:         73.30 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.36d {+10h 05m 27s}   +6.77d {+06d 46' 17"}
MOON_DIST:        53.91 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.97,  6.75 [deg] galactic lon,lat of the burst
ECL_COORDS:       97.17,  1.12 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 14 Apr 11 07:56:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     451343,   Seg_Num: 0
POINT_RA:         97.884d {+06h 31m 32s} (J2000)
POINT_DEC:       +24.365d {+24d 21' 54"} (J2000)
POINT_ROLL:      272.788d
IMG_START_DATE:  15665 TJD;   104 DOY;   11/04/14
IMG_START_TIME:  28043.04 SOD {07:47:23.04} UT,   308.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.580
N_STARS:         146
X_OFFSET:        528 [pixels]
Y_OFFSET:        515 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1474 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00451343000msufc0308.fits
SUN_POSTN:        22.25d {+01h 29m 00s}   +9.32d {+09d 19' 18"}
SUN_DIST:         73.31 [deg]   Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN:      151.36d {+10h 05m 26s}   +6.77d {+06d 46' 24"}
MOON_DIST:        53.90 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      188.98,  6.77 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       97.18,  1.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN Circular #11932
A. Melandri (INAF-OAB), C. Guidorzi (U. Ferrara), C.G. Mundell (Liverpool JMU), A. Gomboc, J. Japelj and D. Kopac (U. Ljubljana) on behalf of a large collaboration report:
The 2-m Faulkes Telescope North robotically followed up GRB110414A (SWIFT trigger 451343; Starling et al. GCN 11931) starting about 4 min after the GRB trigger time. Observations were performed automatically with BVRi filters.
We do not detect any clear fading object inside the reported XRT position down to a limiting magnitude of R~20.0. We do detect a faint uncatalogued source, in one single SDSS-i exposure, inside the XRT error circle with coordinates:
```
RA = 06:31:29.37
Dec = +24:21:45.9  (+/- 1 arcsec)
```
This object is not detected in subsequent SDSS-i frames. Fading is yet to be confirmed.
This message may be cited.
GCN Circular #11934
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 1551 s of XRT Photon Counting mode data and 2 UVOT images for GRB 110414A, 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 = 97.87261, +24.36241 which is equivalent to:
```
RA (J2000): 06h 31m 29.43s
Dec (J2000): +24d 21' 44.7"
```
with an uncertainty of 1.5 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #11935
R. L. C. Starling (U Leicester) reports on behalf of the Swift-XRT team:
We have analysed 9.1 ks of XRT data for GRB 110414A (Starling et al. GCN Circ. 11931), from 131 s to 22.7 ks after the BAT trigger. The data comprise 18 s in Windowed Timing (WT) mode (the first 9 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 11934).
The late-time light curve (from T0+5.1 ks) can be modelled with a power-law decay with a decay index of alpha=1.67 (+0.23, -0.22).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.72 (+/-0.15). The best-fitting absorption column is 5.0 (+/-0.5) x 10^21 cm^-2, in excess of the Galactic value of 3.0 x 10^21 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.32 (+0.17, -0.16) and a best-fitting absorption column of 4.0 (+/-0.6) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.0 x 10^-11 (8.4 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     4.0 (+/-0.6) x 10^21 cm^-2
Galactic foreground: 3.0 x 10^21 cm^-2
Excess significance: 11.7 sigma
Photon index:	     2.32 (+0.17, -0.16)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00451343.
This circular is an official product of the Swift-XRT team.
GCN Circular #11936
T.A. Pritchard (PSU) and R. L. C. Starling (U Leicester) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 110414A 151 s after the BAT trigger (Starling et al., GCN Circ. 11931). No optical afterglow consistent with the XRT position (Starling et al., GCN Circ. 11931) 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_FC           150          300          147        >20.6
u_FC               308          558          246        >19.4
white              150         1013          334        >21.3
v                  639          831           39        >18.4
b                  565          758           39        >18.9
u                  308          733          265        >19.5
w1                 689          709           19        >18.5
m2                 664          856           39        >18.8
w2                 615          807           39        >19.2
```
The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.33 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #11937
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (OSU/NASA/GSFC), R. L. C. Starling (U Leicester), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 110414A (trigger #451343) (Starling, et al., GCN Circ. 11931). The BAT ground-calculated position is RA, Dec = 97.876, 24.349 deg which is
```
   RA(J2000)  =  06h 31m 30.2s 
   Dec(J2000) = +24d 20' 56.5" 
```
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 30%.
The mask-weighted lightcurve shows several overlapping peaks with the first starting at ~T-100 sec, the main peaks at T-33, T+0, T+10, T+25, and a small peak at ~T+120 sec, and ending at ~T+130 sec. T90 (15-350 keV) is 152.0 +- 73.2 sec (estimated error including systematics).
The time-averaged spectrum from T-38.4 to T+135.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.70 +- 0.14. The fluence in the 15-150 keV band is 3.5 +- 0.3 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+8.62 sec in the 15-150 keV band is 1.1 +- 0.3 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/451343/BA/
GCN Circular #11938
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 110414A (Starling et al., GCN 11931) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
The observation started on 2011-04-14 10:35:42 UT (~2.9 h after the burst). We did not find any new point source within the Enhanced XRT circle (Osborne et al., GCN 11934) in all the three bands.
Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.16212    11:35:41    6180.0    >19.3  >19.2  >18.4
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #11939
D. A. Kann (TLS Tautenburg), J. Elliott, and J. Greiner (both MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 110414A (Swift trigger 451343; Starling et al., GCN 11931) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPI/ESO telescope at La Silla Observatory (Chile).
Observations started at 23:17 UT on April 14, 15.58 hours after the GRB trigger, and continued until 00:38 UT. They were obtained under challenging conditions, partially in astronomical twilight, with seeing of 1".5, average airmass of 2.1, bright moonlight and passing cirrus. From exposures of 1379 s in g'r'i'z' and 1440 s in JHK, no source is detected within the UVOT-enhanced XRT error circle reported by Osborne et al. (GCN 11934) or at the position of the possible i' detection (Melandri et al., GCN 11932) down to the following 3 sigma upper limits (all in AB):
g' > 23.0,
r' > 23.3,
i' > 22.9,
z' > 22.9,
J > 20.1,
H > 19.7 and,
K > 17.3
If the i' detection of Melandri et al. (GCN 11932) is confirmed, our observations show the source has faded and is thus likely the afterglow of GRB 110414A.
The given limits are derived based on calibrating the images against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E_(B-V) = 0.331 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #11940
D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 110414A (Starling et al., GCN 11931) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory.
The observation started on 10:57:59 UT (~3.3 h after the burst). We did not find any new point source within the Enhanced XRT circle (Osborne et al., GCN 11934) in all the three bands.
Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.17783    11:58:19    6180.0    >19.7  >19.8  >19.1
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Report 332.1
GCN_Report 332.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_332_1.pdf by R.L.C. Starling at U.Leicester titled: "Final Report on Swift GRB 110414A"

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Jochen Greiner, last update: 16-Apr-2011 [Disclaimer]