Gamma-ray Burst 070107

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:07:06 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     255029,   Seg_Num: 0
GRB_RA:          159.408d {+10h 37m 38s} (J2000),
                 159.479d {+10h 37m 55s} (current),
                 158.899d {+10h 35m 36s} (1950)
GRB_DEC:         -53.208d {-53d 12' 27"} (J2000),
                 -53.244d {-53d 14' 38"} (current),
                 -52.948d {-52d 56' 50"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=4809 [image_cnts]
TRIGGER_DUR:     96.000 [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:        14107 TJD;     7 DOY;   07/01/07
GRB_TIME:        43518.31 SOD {12:05:18.31} UT
GRB_PHI:         166.91 [deg]
GRB_THETA:        37.94 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    17.29 [sigma]
MERIT_PARAMS:     +1  +0  +0  +7  +1  +5  +0  +1  +4  +1 
SUN_POSTN:       288.22d {+19h 12m 52s}  -22.38d {-22d 22' 53"}
SUN_DIST:         92.36 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.36d {+10h 21m 26s}  +11.58d {+11d 34' 36"}
MOON_DIST:        64.92 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.59,  4.56 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      192.60,-54.94 [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 = 188.00,-20.51 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:08:23 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.443d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.225d {-53d 13' 30"} (J2000)
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43697.02 SOD {12:08:17.02} UT,   178.7 [sec] since BAT Trigger Time
COUNTS:          19    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN Circular #5999
M. Stamatikos (NASA/ORAU), S.D. Barthelmy (GSFC), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), W. B. Landsman (NASA/GSFC), T. Mineo (INAF-IASFPA), D. M. Palmer (LANL) and P. Romano (Univ. Bicocca & INAF-OAB) report on behalf of the Swift Team:
At 12:05:18 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070107 (trigger=255029). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 159.408, -53.208 which is
```
     RA(J2000)  = 10h 37m 38s
     Dec(J2000) = -53d 12'
```
27" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a broad peak lasting about 40 seconds with smaller structure. The peak count rate was ~2500 counts/sec (15-350 keV), at ~6 sec after the trigger.
The XRT began observing the field at 12:08:17.02 UT, 179 seconds after the BAT trigger. XRT did not make an immediate localization. The lightcurve does not show any time variability, however, the spectrum appears consistent with that of a GRB. We are waiting for the full data set from the next Malindi download data pass for futher analysis.
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 181 seconds after the BAT trigger, and a finding chart exposure of 400 seconds with the V filter starting 287 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 25% of the BAT error circle, and the 8'x8' region for the list of sources generated on-board covers 100% of the BAT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the region. No correction has been made for extinction.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 08 Jan 07 03:33:43 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     255029,   Seg_Num: 0
GRB_RA:          159.4003d {+10h 37m 36.0s} (J2000),
                 159.4719d {+10h 37m 53.2s} (current),
                 158.8917d {+10h 35m 34.0s} (1950)
GRB_DEC:         -53.2130d {-53d 12' 46.8"} (J2000),
                 -53.2496d {-53d 14' 58.5"} (current),
                 -52.9528d {-52d 57' 10.2"} (1950)
GRB_ERROR:       9.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-08 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14108 TJD;     8 DOY;   07/01/08
IMG_START_TIME:  43697.01 SOD {12:08:17.01} UT,   178.7 [sec] since BAT Trigger
Time
TAM[0-3]:        327.61 237.19 261.35 242.66
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       288.92d {+19h 15m 41s}  -22.30d {-22d 17' 54"}
SUN_DIST:         92.74 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      162.46d {+10h 49m 51s}   +8.05d {+08d 03' 14"}
MOON_DIST:        61.36 [deg]
MOON_ILLUM:      80 [%]
GAL_COORDS:      283.59,  4.56 [deg] galactic lon,lat of the burst
ECL_COORDS:      192.60,-54.94 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values are not valid.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:28:30 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
POINT_ROLL:      133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44489.93 SOD {12:21:29.93} UT,   971.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.103
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0971.fits
SUN_POSTN:       288.23d {+19h 12m 56s}  -22.38d {-22d 22' 46"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.53d {+10h 22m 06s}  +11.50d {+11d 29' 47"}
MOON_DIST:        64.85 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:20:04 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
POINT_ROLL:      133.808d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43804.92 SOD {12:10:04.92} UT,   286.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.081
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0286.fits
SUN_POSTN:       288.23d {+19h 12m 54s}  -22.38d {-22d 22' 49"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.46d {+10h 21m 51s}  +11.53d {+11d 31' 41"}
MOON_DIST:        64.88 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:22:21 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.228d {-53d 13' 38"} (J2000)
POINT_ROLL:      133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44384.67 SOD {12:19:44.67} UT,   866.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.192
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0866.fits
SUN_POSTN:       288.23d {+19h 12m 55s}  -22.38d {-22d 22' 48"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.48d {+10h 21m 55s}  +11.52d {+11d 31' 10"}
MOON_DIST:        64.88 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:10:46 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.443d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.225d {-53d 13' 30"} (J2000)
POINT_ROLL:      133.806d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43699.69 SOD {12:08:19.69} UT,   181.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.102
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0181.fits
SUN_POSTN:       288.22d {+19h 12m 53s}  -22.38d {-22d 22' 52"}
SUN_DIST:         92.33 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.39d {+10h 21m 33s}  +11.56d {+11d 33' 46"}
MOON_DIST:        64.92 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:23:50 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.228d {-53d 13' 38"} (J2000)
ROLL:            133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44384.67 SOD {12:19:44.67} UT,   866.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     189865186
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0866.fits
SUN_POSTN:       288.23d {+19h 12m 55s}  -22.38d {-22d 22' 47"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.49d {+10h 21m 58s}  +11.51d {+11d 30' 50"}
MOON_DIST:        64.87 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:12:20 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.443d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.225d {-53d 13' 30"} (J2000)
ROLL:            133.806d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43699.69 SOD {12:08:19.69} UT,   181.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     189864501
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0181.fits
SUN_POSTN:       288.22d {+19h 12m 53s}  -22.38d {-22d 22' 51"}
SUN_DIST:         92.33 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.40d {+10h 21m 36s}  +11.56d {+11d 33' 25"}
MOON_DIST:        64.91 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:30:00 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
ROLL:            133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44489.93 SOD {12:21:29.93} UT,   971.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     189865291
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0971.fits
SUN_POSTN:       288.23d {+19h 12m 56s}  -22.38d {-22d 22' 45"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.54d {+10h 22m 09s}  +11.49d {+11d 29' 27"}
MOON_DIST:        64.84 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:21:35 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
ROLL:            133.808d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43804.92 SOD {12:10:04.92} UT,   286.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     189864606
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0286.fits
SUN_POSTN:       288.23d {+19h 12m 55s}  -22.38d {-22d 22' 48"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.47d {+10h 21m 54s}  +11.52d {+11d 31' 20"}
MOON_DIST:        64.88 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:09:46 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     255029,   Seg_Num: 0
GRB_RA:          159.408d {+10h 37m 38s} (J2000),
                 159.479d {+10h 37m 55s} (current),
                 158.899d {+10h 35m 36s} (1950)
GRB_DEC:         -53.208d {-53d 12' 27"} (J2000),
                 -53.244d {-53d 14' 38"} (current),
                 -52.948d {-52d 56' 50"} (1950)
GRB_DATE:        14107 TJD;     7 DOY;   07/01/07
GRB_TIME:        43518.31 SOD {12:05:18.31} UT
TRIGGER_INDEX:   20000
GRB_PHI:         166.91 [deg]
GRB_THETA:        37.94 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     96.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    17.29 [sigma]
LC_URL:          sw00255029000msb.lc
SUN_POSTN:       288.22d {+19h 12m 52s}  -22.38d {-22d 22' 52"}
SUN_DIST:         92.36 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.38d {+10h 21m 31s}  +11.57d {+11d 33' 60"}
MOON_DIST:        64.91 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.59,  4.56 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      192.60,-54.94 [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 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 = 188.00,-20.51 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:12:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.443d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.225d {-53d 13' 30"} (J2000)
ROLL:            133.806d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43699.69 SOD {12:08:19.69} UT,   181.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     189864501
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0181.fits
SUN_POSTN:       288.22d {+19h 12m 53s}  -22.38d {-22d 22' 51"}
SUN_DIST:         92.33 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.40d {+10h 21m 37s}  +11.56d {+11d 33' 21"}
MOON_DIST:        64.91 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [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:     Sun 07 Jan 07 12:21:50 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
ROLL:            133.808d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43804.92 SOD {12:10:04.92} UT,   286.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     189864606
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0286.fits
SUN_POSTN:       288.23d {+19h 12m 55s}  -22.38d {-22d 22' 48"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.48d {+10h 21m 54s}  +11.52d {+11d 31' 17"}
MOON_DIST:        64.88 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #6000
J. A. Kennea (PSU) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift/XRT team:
At 12:08:17 UT, Swift XRT began observing GRB 070107. Although no X-ray counterpart was found by the on-board software, analysis of downlinked data reveals a bright, flaring, uncatalogued point source at the following location:
```
RA(J2000) = 10h 37m 36.1,
Dec(J2000) = -53d 12m 46.9s,
```
with an estimated uncertainty of 10 arcseconds radius (90% contrainment). This position lies 24 arcseconds from the BAT position reported in GCN 5999.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:30:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
ROLL:            133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44489.93 SOD {12:21:29.93} UT,   971.6 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     189865291
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0971.fits
SUN_POSTN:       288.23d {+19h 12m 56s}  -22.38d {-22d 22' 45"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.54d {+10h 22m 10s}  +11.49d {+11d 29' 23"}
MOON_DIST:        64.84 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [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:     Sun 07 Jan 07 12:24:03 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.228d {-53d 13' 38"} (J2000)
ROLL:            133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44384.67 SOD {12:19:44.67} UT,   866.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     189865186
X_OFFSET:        616 [pixels]
Y_OFFSET:        967 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       776
Y_GRB_POS:       1127
BINNING_INDEX:   1
IM_URL:          sw00255029000msuni0866.fits
SUN_POSTN:       288.23d {+19h 12m 55s}  -22.38d {-22d 22' 47"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.49d {+10h 21m 58s}  +11.51d {+11d 30' 47"}
MOON_DIST:        64.87 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [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:     Sun 07 Jan 07 12:29:02 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
POINT_ROLL:      133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44489.93 SOD {12:21:29.93} UT,   971.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.103
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0971.fits
SUN_POSTN:       288.23d {+19h 12m 56s}  -22.38d {-22d 22' 46"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.53d {+10h 22m 07s}  +11.49d {+11d 29' 40"}
MOON_DIST:        64.85 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:20:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.227d {-53d 13' 38"} (J2000)
POINT_ROLL:      133.808d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43804.92 SOD {12:10:04.92} UT,   286.6 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        2.081
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0286.fits
SUN_POSTN:       288.23d {+19h 12m 54s}  -22.38d {-22d 22' 48"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.47d {+10h 21m 52s}  +11.53d {+11d 31' 34"}
MOON_DIST:        64.88 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:22:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.441d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.228d {-53d 13' 38"} (J2000)
POINT_ROLL:      133.809d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  44384.67 SOD {12:19:44.67} UT,   866.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.192
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0866.fits
SUN_POSTN:       288.23d {+19h 12m 55s}  -22.38d {-22d 22' 48"}
SUN_DIST:         92.34 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.48d {+10h 21m 56s}  +11.52d {+11d 31' 02"}
MOON_DIST:        64.87 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 07 Jan 07 12:11:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     255029,   Seg_Num: 0
POINT_RA:        159.443d {+10h 37m 46s} (J2000)
POINT_DEC:       -53.225d {-53d 13' 30"} (J2000)
POINT_ROLL:      133.806d
IMG_START_DATE:  14107 TJD;     7 DOY;   07/01/07
IMG_START_TIME:  43699.69 SOD {12:08:19.69} UT,   181.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.102
N_STARS:         190
X_OFFSET:        297 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1256 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00255029000msufc0181.fits
SUN_POSTN:       288.22d {+19h 12m 53s}  -22.38d {-22d 22' 51"}
SUN_DIST:         92.33 [deg]   Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN:      155.39d {+10h 21m 34s}  +11.56d {+11d 33' 38"}
MOON_DIST:        64.92 [deg]
MOON_ILLUM:      85 [%]
GAL_COORDS:      283.62,  4.56 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      192.64,-54.94 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN Circular #6001
S. D. Barthelmy (GSFC), L. Barbier (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU) on behalf of the Swift-BAT team:
Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 070107 (trigger #255029) (Stamatikos, et al., GCN Circ. 5900). The BAT ground-calculated position is RA, Dec = 159.422, -53.202 deg which is
```
   RA(J2000)  =  10h 37m 41.4s 
   Dec(J2000) = -53d 12' 08.4" 
```
with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 53%.
The analysis of this burst is complicated by the fact that the burst started before it was in the BAT FOV. BAT was executing a preplanned slew to the next planned target when the burst came into the FOV. BAT triggered (a 96-sec imager trigger) on the tail end of the last of 2 (or potentially more) peaks in the burst. The mask-weighted lightcurve starts at ~T-32 sec with a rising flux, peaking at ~T-7 sec, and then returning to almost background levels at ~T+80 sec. Then there is a FRED-like peak starting at ~T+310 sec, peaking at ~T+320 sec, and returning to background levels at ~T+400 sec. We are not quoting a T90 value because the burst data was truncated at the beginning of the burst.
For the partial amount of time covered, the time-averaged spectrum from T-19.7 to T+404.2 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.34 +- 0.10. The lower limit to the fluence in the 15-150 keV band is 5.2 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured (for the portion of the burst BAT observed) from T-7.24 sec in the 15-150 keV band is 1.9 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #6002
GRB 070107: Possible UVOT Afterglow
P. T. Boyd (GSFC), M. Chester (PSU), C. B. Markwardt (CRESST/GSFC/USRA) and F. E. Marshall (GSFC) report on behalf of the Swift team:
In response to GRB 070107 (Stamatikos et al. GCN Circ. 5999) UVOT took a 100-s finding chart exposure with the White filter (160-650 nm) starting 183 seconds after the BAT trigger, followed by a 400-s V finding chart exposure. A second set of finding chart exposures was obtained starting 868s post-trigger. We detect a new variable source inside the XRT error region (Kennea et al. GCN Circ. 6000) in the first exposure at
```
  RA(J2000)  =  10 37 36.35
  DEC(J2000) = -53 12 47.5
```
with a 1-sigma error radius of about 1 arcsec. However, we caution that this source is in a crowded region at low galactic latitude, and only 4.1 arcsec from a bright V=15.9 cataloged star, which causes the afterglow and the star to be blended in the UVOT image, and complicates the position, magnitude, and significance estimates. We estimate a White magnitude of ~19.5 for the new source. The source is detected at a ~4-sigma significance level. The same source is detected at a level of 2.7 sigma in the subsequent 400-s V finding chart. The new source is not significant in later White and V exposures.
We note that the extinction estimate in this region (whose galactic latitude is 4.56 degrees) is large, and uncertain.
GCN Circular #6003
T. Mineo, B. Sbarufatti, V. Mangano, G. Cusumano (INAF-IASF Pa) report on behalf of the Swift XRT team:
We have analyzed the first ten orbits of Swift-XRT data on GRB 070107 (Stamatikos et al. GCN 5999), with a total exposure of 420 s seconds in Window Timing (WT) mode and 15.8 ks seconds in Photon Counting (PC)=20 mode. This provides a refined XRT position at RA,Dec=3D159.4016,-53.2131 which is:
```
RA (J2000) =3D  10h 37m 36.4s
Dec(J2000) =3D -53d 12m 47.3s
```
with an estimated error radius of 3.7 arcseconds (90% confidence). This position is 59.4 arcseconds from the BAT refined position (Barthelmy et al. GCN 6001), 2.6 arcseconds from the initial XRT position (Kennea & Stamatikos, GCN 6000), and 0.4 arcseconds from the UVOT optical candidate (Boyd et al., GCN 6002).
The 0.3-10 keV X-ray light curve presents a bright flare starting at about 300 s from the trigger and coincident with the peak detected in the BAT light curve (Barthelmy et al. GCN 6001). A second fainter peak is also present at 1300 s and the light curve between 3 ks and 59 ks can be fit with a simple power-law with a decay slope of 1.05 +- 0.05.
The X-ray spectrum from the XRT/WT data, mainly covering the first bright flare, is well fit by an absorbed power-law with a photon index of 2.07=B10.07 and column density of (3.8=B10.2)e21 cm**-2, consistent with the Galactic column density in the direction of the source (3.6E21 cm**-2). The unabsorbed 0.3-10 keV flux for this spectrum is 1.3e-9 erg/cm**2/s. The XRT/PC data is modeled by an absorbed power law with a photon index of 2.2=B10.1 and column density of (4.3=B10.4)e21 cm**-2 and the unabsorbed 0.3-10 keV flux is 2.48E-11 erg/cm**2/s.
Assuming the X-ray emission continues to decline at the same rate, we predict a 0.3-10 keV XRT count rate of 1e-2 count/s at T+48hr, which corresponds to an observed 0.3-10 keV flux of 1.4e-12 erg/cm**2/s.
This circular is an official product of the Swift XRT Team.
GCN Report 25.1
GCN_Report 25.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_25_1.pdf by M. Stamatikos at GSFC/ORAU titled: "Swift Observations of GRB 070107"
GCN Circular #6006
GRB 070107: UVOT Observations of a Fading Optical Afterglow
P. T. Boyd and F. E. Marshall (NASA/GSFC) report on behalf of the Swift team:
UVOT observed the field of GRB 070107 (Stamatikos et al. GCN Circ. 5999). The complete data set through T=117,471s now available clearly shows a fading source at the position reported by Boyd et al. (GCN Circ 6002). This afterglow candidate is visible at early times in the White and V filters, and probably also in the U filter.
The table below gives the measured magnitudes after correcting for flux in the source aperture due to the bright (V=15.9 mag) nearby star. Reported significance levels were calculated based on rates in the source region, while magnitude errors include the contribution from aperture correction.
```
Filter  TSTART  Exposure        Mag     Error   Significance

White   181     98              19.5    0.3        5.6
White   5355    197             20.5    0.3        3.5
V       286     393             19.2    0.3        3.9
V       971     393             19.8    0.4        2.0
U       29220   590             20.6    0.4        2.8
B       5151	197             20.7  	(3sigma UL)
W1      6174	197             20.0    (3sigma UL)
M2      16718	886             20.5    (3sigma UL)
W2      22501	886             20.8 	(3sigma UL)
```
These magnitudes have not been corrected for the large and unreliable Galactic extinction at this position.
GCN Circular #6016
T. Takahashi, M. Ohno, T. Asano, T. Uehara, Y. Fukazawa (Hiroshima U.), Y. Urata, M. Tashiro, K. Abe, K. Onda, Y. Sato, M. Suzuki (Saitama U.), K. Yamaoka, S. Sugita (Aoyama Gakuin U.), T. Enoto, R. Miyawaki, K. Makishima (Univ. of Tokyo), M. Suzuki, T. Tamagawa, Y. Terada (RIKEN), K. Nakazawa, M. Kokubun, T. Takahashi, (ISAS/JAXA), S. Hong (Nihon U.), on behalf of the Suzaku WAM team report:
The long GRB 070107 (Stamatikos et al., GCN 5999; Barthelmy et al., GCN 6001) triggered the Suzaku Wide-band All-sky Monitor (WAM), which covers the energy range of 50 keV - 5 MeV, at 12:05:06 UT(=T0). The light curve shows double peaks with a total duration of about 92 seconds. The fluence in 100 - 1000 keV of the burst was 1.57 +- 0.13 x 10^-5 erg/cm2, while the 1-s peak flux was 1.18 (-0.13, +0.14) photons/cm2/s in the same energy range.
The time-averaged spectrum from T0-66 sec to T0+94 sec is well fitted by a single power-law model. The power-law photon index of its spectrum is 1.75 (-0.13,+0.15). All the quoted errors are at statistical 90% confidence level, while systematic errors are not included.
The WAM light curve of this event is available at http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/grb_table.html

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Jochen Greiner, last update: 13-Jan-2007 [Disclaimer]