Gamma-ray Burst 070110

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:23:25 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     255445,   Seg_Num: 0
GRB_RA:            0.910d {+00h 03m 38s} (J2000),
                   0.999d {+00h 03m 60s} (current),
                   0.273d {+00h 01m 06s} (1950)
GRB_DEC:         -52.961d {-52d 57' 39"} (J2000),
                 -52.922d {-52d 55' 18"} (current),
                 -53.239d {-53d 14' 21"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       14351 [cnts]    Image_Peak=491 [image_cnts]
TRIGGER_DUR:     3.072 [sec] 
TRIGGER_INDEX:   474     E_range: 25-100 keV
BKG_INTEN:       126926 [cnts]
BKG_TIME:        26518.31 SOD {07:21:58.31} UT
BKG_DUR:         32 [sec]
GRB_DATE:        14110 TJD;    10 DOY;   07/01/10
GRB_TIME:        26561.57 SOD {07:22:41.57} UT
GRB_PHI:         -11.15 [deg]
GRB_THETA:        20.91 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     9.69 [sigma]
IMAGE_SIGNIF:    10.23 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +2  +0  +0  +0 -49  +1 
SUN_POSTN:       291.27d {+19h 25m 06s}  -22.00d {-21d 59' 51"}
SUN_DIST:         60.49 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.23d {+12h 20m 56s}   -4.08d {-04d 04' 43"}
MOON_DIST:       122.89 [deg]
MOON_ILLUM:      62 [%]
GAL_COORDS:      318.70,-62.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      332.86,-47.41 [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 = 207.13,-18.34 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:24:45 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     255445,   Seg_Num: 0
GRB_RA:            0.9145d {+00h 03m 39.4s} (J2000),
                   1.0036d {+00h 04m 00.8s} (current),
                   0.2778d {+00h 01m 06.6s} (1950)
GRB_DEC:         -52.9751d {-52d 58' 30.3"} (J2000),
                 -52.9360d {-52d 56' 09.5"} (current),
                 -53.2535d {-53d 15' 12.5"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       82 [cnts]
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26655.01 SOD {07:24:15.01} UT,   93.4 [sec] since BAT Trigger Time
CENTROID_X:      283.98,  raw= 284  [pixels]
CENTROID_Y:      312.11,  raw= 312  [pixels]
ROLL:            272.09 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   33.26
GRB_POS_XRT_Z:   -43.17
IMAGE_URL:       sw00255445000msxps_rw.img
SUN_POSTN:       291.27d {+19h 25m 06s}  -22.00d {-21d 59' 50"}
SUN_DIST:         60.49 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.24d {+12h 20m 58s}   -4.08d {-04d 05' 02"}
MOON_DIST:       122.87 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.68,-62.67 [deg] galactic lon,lat of the burst
ECL_COORDS:      332.85,-47.42 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:24:44 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     255445,   Seg_Num: 0
GRB_RA:            0.9145d {+00h 03m 39.4s} (J2000),
                   1.0036d {+00h 04m 00.8s} (current),
                   0.2778d {+00h 01m 06.6s} (1950)
GRB_DEC:         -52.9751d {-52d 58' 30.3"} (J2000),
                 -52.9360d {-52d 56' 09.5"} (current),
                 -53.2535d {-53d 15' 12.5"} (1950)
GRB_ERROR:       5.0 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       2.13e-09 [erg/cm2/sec]
GRB_SIGNIF:      9.05 [sigma]
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26655.01 SOD {07:24:15.01} UT,   93.4 [sec] since BAT Trigger Time
TAM[0-3]:        327.61 237.26 261.29 243.38
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       291.27d {+19h 25m 06s}  -22.00d {-21d 59' 50"}
SUN_DIST:         60.49 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.24d {+12h 20m 58s}   -4.08d {-04d 05' 02"}
MOON_DIST:       122.87 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.68,-62.67 [deg] galactic lon,lat of the burst
ECL_COORDS:      332.85,-47.42 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:24:48 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     255445,   Seg_Num: 0
GRB_RA:            0.9145d {+00h 03m 39.4s} (J2000),
                   1.0036d {+00h 04m 00.8s} (current),
                   0.2778d {+00h 01m 06.6s} (1950)
GRB_DEC:         -52.9751d {-52d 58' 30.3"} (J2000),
                 -52.9360d {-52d 56' 09.5"} (current),
                 -53.2535d {-53d 15' 12.5"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       82 [cnts]
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26655.01 SOD {07:24:15.01} UT,   93.4 [sec] since BAT Trigger Time
CENTROID_X:      283.98,  raw= 284  [pixels]
CENTROID_Y:      312.11,  raw= 312  [pixels]
ROLL:            272.09 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   33.26
GRB_POS_XRT_Z:   -43.17
IMAGE_URL:       sw00255445000msxps_rw.img
SUN_POSTN:       291.28d {+19h 25m 06s}  -22.00d {-21d 59' 50"}
SUN_DIST:         60.49 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.24d {+12h 20m 58s}   -4.08d {-04d 05' 02"}
MOON_DIST:       122.87 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.68,-62.67 [deg] galactic lon,lat of the burst
ECL_COORDS:      332.85,-47.42 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:26:19 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     255445,   Seg_Num: 0
GRB_RA:            0.910d {+00h 03m 38s} (J2000),
                   0.999d {+00h 03m 60s} (current),
                   0.273d {+00h 01m 06s} (1950)
GRB_DEC:         -52.961d {-52d 57' 39"} (J2000),
                 -52.922d {-52d 55' 18"} (current),
                 -53.239d {-53d 14' 21"} (1950)
GRB_DATE:        14110 TJD;    10 DOY;   07/01/10
GRB_TIME:        26561.57 SOD {07:22:41.57} UT
TRIGGER_INDEX:   474
GRB_PHI:         -11.15 [deg]
GRB_THETA:        20.91 [deg]
DELTA_TIME:      -5.00 [sec]
TRIGGER_DUR:     3.072 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     9.69 [sigma]
IMAGE_SIGNIF:    10.23 [sigma]
LC_URL:          sw00255445000msb.lc
SUN_POSTN:       291.28d {+19h 25m 06s}  -22.00d {-21d 59' 50"}
SUN_DIST:         60.49 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.25d {+12h 21m 01s}   -4.09d {-04d 05' 24"}
MOON_DIST:       122.87 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.70,-62.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      332.86,-47.41 [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 = 207.13,-18.34 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:26:35 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 45s} (J2000)
POINT_DEC:       -52.965d {-52d 57' 55"} (J2000)
POINT_ROLL:      272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26664.42 SOD {07:24:24.42} UT,   102.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.588
N_STARS:         20
X_OFFSET:        592 [pixels]
Y_OFFSET:        536 [pixels]
X_MAX:           1551 [pixels]
Y_MAX:           1495 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00255445000msufc0102.fits
SUN_POSTN:       291.28d {+19h 25m 06s}  -22.00d {-21d 59' 50"}
SUN_DIST:         60.51 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.26d {+12h 21m 01s}   -4.09d {-04d 05' 27"}
MOON_DIST:       122.87 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:27:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 45s} (J2000)
POINT_DEC:       -52.965d {-52d 57' 55"} (J2000)
POINT_ROLL:      272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26664.42 SOD {07:24:24.42} UT,   102.8 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.588
N_STARS:         20
X_OFFSET:        592 [pixels]
Y_OFFSET:        536 [pixels]
X_MAX:           1551 [pixels]
Y_MAX:           1495 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00255445000msufc0102.fits
SUN_POSTN:       291.28d {+19h 25m 06s}  -22.00d {-21d 59' 49"}
SUN_DIST:         60.51 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.26d {+12h 21m 02s}   -4.09d {-04d 05' 36"}
MOON_DIST:       122.87 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [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:     Wed 10 Jan 07 07:27:47 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 45s} (J2000)
POINT_DEC:       -52.965d {-52d 57' 55"} (J2000)
ROLL:            272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26664.42 SOD {07:24:24.42} UT,   102.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     190106666
X_OFFSET:        848 [pixels]
Y_OFFSET:        786 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       946
BINNING_INDEX:   1
IM_URL:          sw00255445000msuni0102.fits
SUN_POSTN:       291.28d {+19h 25m 07s}  -22.00d {-21d 59' 49"}
SUN_DIST:         60.51 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.26d {+12h 21m 04s}   -4.10d {-04d 05' 44"}
MOON_DIST:       122.87 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [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:     Wed 10 Jan 07 07:28:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 45s} (J2000)
POINT_DEC:       -52.965d {-52d 57' 55"} (J2000)
ROLL:            272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26664.42 SOD {07:24:24.42} UT,   102.8 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     190106666
X_OFFSET:        848 [pixels]
Y_OFFSET:        786 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       946
BINNING_INDEX:   1
IM_URL:          sw00255445000msuni0102.fits
SUN_POSTN:       291.28d {+19h 25m 07s}  -22.00d {-21d 59' 49"}
SUN_DIST:         60.51 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.27d {+12h 21m 04s}   -4.10d {-04d 05' 48"}
MOON_DIST:       122.86 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [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:     Wed 10 Jan 07 07:34:00 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 44s} (J2000)
POINT_DEC:       -52.968d {-52d 58' 04"} (J2000)
POINT_ROLL:      272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26769.71 SOD {07:26:09.71} UT,   208.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.533
N_STARS:         32
X_OFFSET:        528 [pixels]
Y_OFFSET:        466 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1425 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00255445000msufc0208.fits
SUN_POSTN:       291.28d {+19h 25m 08s}  -22.00d {-21d 59' 47"}
SUN_DIST:         60.50 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.31d {+12h 21m 14s}   -4.12d {-04d 07' 11"}
MOON_DIST:       122.84 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 07:34:21 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 44s} (J2000)
POINT_DEC:       -52.968d {-52d 58' 04"} (J2000)
POINT_ROLL:      272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26769.71 SOD {07:26:09.71} UT,   208.1 [sec] since BAT Trigger Time
FILTER:          3, V
BKG_MEAN:        1.533
N_STARS:         32
X_OFFSET:        528 [pixels]
Y_OFFSET:        466 [pixels]
X_MAX:           1487 [pixels]
Y_MAX:           1425 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00255445000msufc0208.fits
SUN_POSTN:       291.28d {+19h 25m 08s}  -22.00d {-21d 59' 47"}
SUN_DIST:         60.50 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.31d {+12h 21m 15s}   -4.12d {-04d 07' 15"}
MOON_DIST:       122.83 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [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:     Wed 10 Jan 07 07:35:17 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 44s} (J2000)
POINT_DEC:       -52.968d {-52d 58' 04"} (J2000)
ROLL:            272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26769.71 SOD {07:26:09.71} UT,   208.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     190106771
X_OFFSET:        848 [pixels]
Y_OFFSET:        786 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       946
BINNING_INDEX:   1
IM_URL:          sw00255445000msuni0208.fits
SUN_POSTN:       291.28d {+19h 25m 08s}  -22.00d {-21d 59' 46"}
SUN_DIST:         60.50 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.32d {+12h 21m 17s}   -4.12d {-04d 07' 28"}
MOON_DIST:       122.83 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [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:     Wed 10 Jan 07 07:35:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     255445,   Seg_Num: 0
POINT_RA:          0.935d {+00h 03m 44s} (J2000)
POINT_DEC:       -52.968d {-52d 58' 04"} (J2000)
ROLL:            272.088d
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26769.71 SOD {07:26:09.71} UT,   208.1 [sec] since BAT Trigger Time
FILTER:          3, V
EXPOSURE_ID:     190106771
X_OFFSET:        848 [pixels]
Y_OFFSET:        786 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1008
Y_GRB_POS:       946
BINNING_INDEX:   1
IM_URL:          sw00255445000msuni0208.fits
SUN_POSTN:       291.28d {+19h 25m 08s}  -22.00d {-21d 59' 46"}
SUN_DIST:         60.50 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.32d {+12h 21m 17s}   -4.13d {-04d 07' 33"}
MOON_DIST:       122.83 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.66,-62.68 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      332.87,-47.42 [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 Circular #6005
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. B. Markwardt (GSFC/UMD), T. Mineo (INAF-IASFPA), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team:
At 07:22:41 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070110 (trigger=3D255445). Swift slewed immediately to the burst. The BAT on-board calculated location is=20 RA, Dec 0.910, -52.961 which is=20
```
   RA(J2000)  =3D  00h 03m 38s
   Dec(J2000) =3D -52d 57' 39"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a multi-peaked structure with a duration of about 70 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~18 sec after the trigger.
The XRT began observing the field at 07:24:15 UT, 93 seconds after the BAT trigger. XRT found a bright, variable, uncatalogued X-ray source located at RA(J2000) =3D 00h 03m 39.6s, Dec(J2000) =3D -52d 58' 29.1", with an estimated uncertainty of 4.2 arcseconds (90% confidence radius).=20 This is a ground calculated position based on prompt downlinked data. This location is 52 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 2.5s image was 2.1e-09 erg/cm2/s (0.2-10 keV).
UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 104 seconds after the BAT trigger. An afterglow candidate is apparent at RA=3D0.9133 (00h 03m 39.20s), DEC=3D-52.9740 (-52d 58' 26.3") with an estimated uncertainty of =B1 1 arcsec, which is 4.6" from the XRT position. The estimated magnitude is 20.9 (white), with an uncertainty of =B1 1 mag. Additional data products are not yet available to confirm the candidate. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. No correction has been made for the expected extinction corresponding to E(B-V) of 0.014.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 10 Jan 07 08:17:35 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     255445,   Seg_Num: 0
GRB_RA:            0.9133d {+00h 03m 39.19s} (J2000),
                   1.0024d {+00h 04m 00.58s} (current),
                   0.2766d {+00h 01m 06.39s} (1950)
GRB_DEC:         -52.9739d {-52d 58' 26.0"} (J2000),
                 -52.9348d {-52d 56' 05.2"} (current),
                 -53.2523d {-53d 15' 08.2"} (1950)
GRB_ERROR:       0.7 [arcsec radius, statistical only]
GRB_MAG:         20.89 +/- 1.00 [mag]
FILTER:          10, White
IMG_START_DATE:  14110 TJD;    10 DOY;   07/01/10
IMG_START_TIME:  26665.00 SOD {07:24:25.00} UT,   103.4 [sec] since BAT Trigger Time
SUN_POSTN:       291.31d {+19h 25m 16s}  -21.99d {-21d 59' 31"}
SUN_DIST:         60.47 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
MOON_POSTN:      185.63d {+12h 22m 30s}   -4.29d {-04d 17' 17"}
MOON_DIST:       122.64 [deg]
MOON_ILLUM:      61 [%]
GAL_COORDS:      318.68,-62.67 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      332.85,-47.42 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        Candidate afterglow from first finding chart image  
COMMENTS:        Additional images not available to confirm

GCN Circular #6007
GRB 070110, Swift-BAT refined analysis
J. Cummings (GSFC/UMBC), L. Barbier (GSFC), S. D. Barthelmy (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho), 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) on behalf of the Swift-BAT team:
Using the data set from T-239 to T+750 sec from recent telemetry downlinks, we report further analysis of BAT GRB 070110 (trigger #255445) (Krimm, et al., GCN Circ. 6005). The BAT ground-calculated position is RA, Dec = 0.934, -52.978 deg which is
```
     RA(J2000)  =  00h 03m 44.2s
     Dec(J2000) = -52d 58' 39.8"
```
with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 97%.
The mask-tagged light curve shows a very broad peak beginning at T-3 sec and peaking at T+0 sec. Then there is a slow exponential decline in the light curve out to T+135 s, with two or three additional peaks superimposed. T90 (15-350 keV) is 85 +- 5 sec (estimated error including systematics).
The time-averaged spectrum from T-2.7 to T+100.6 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.57 +- 0.12. The fluence in the 15-150 keV band is 1.6 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.16 sec in the 15-150 keV band is 0.6 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #6008
B. Sbarufatti, V. Mangano, T. Mineo, G. Cusumano (INAF-IASFPA), and H. Krimm (GSFC/USRA) report on behalf of the Swift XRT Team:
We have analysed the first five orbits of XRT data of GRB07011, consisting of 171 s of exposure in Windowed Timing (WT) mode and 10 ks of exposure in Photon Counting (PC) mode.
The XRT refined position from the PC data is:
```
   RA(J2000)  =  00h 03m 39.43s
   Dec(J2000) = -52d 58' 26.7s
```
with an error of 3.6 arcsec (90% containment). This is 45.3 arcsec from the refined BAT position (Cummings et al., GCN 6007), 3.0 arcsec from the preliminary XRT position and 1.9 arcsec from the UVOT position (Krimm et al., GCN 6005).
The 0.3-10 keV light curve shows an initial steep decay with slope -2.53 +/- 0.07 followed by a flat decay phase with slope -0.05 +/- 0.04, that starts 580 +/- 43 s after the trigger. After a further break at 20.3 +/- 0.8 ks from the trigger the light curve steepens abruptly, with a slope -7.9 +/- 0.9. A small flare is detected at about T+380 s.
The WT and PC spectra are well fit by an absorbed power law with photon index 2.00 +/- 0.08. The absorption is at the level of 3e20 cm^-2, consistent with the Galactic absorpion along the light of sight (1.8e20 cm^-2). The average unabsorbed flux of the WT and PC spectra is 7.0e-10 and 1.7e-11 erg cm^-2 s^-1 respectively.
If decaying at the present rate the source will reach a count rate of 4e-6 counts/s in the 0.3-10 keV band at T+24 hr, which corresponds to an unabsorbed 0.3-10 keV flux of 2e-16 erg cm^-2 s^-1.
All quoted errors are the 90% confidence level.
This circular is an official product of the Swift XRT Team.
GCN Circular #6009
P. Roming (PSU), P. T. Boyd, and H. Krimm (NASA/GSFC) report on behalf of the Swift UVOT team:
The Swift/UVOT began settled observations of GRB 070110 104 seconds after the BAT trigger (Krimm et al., GCN Circ.6005). Analysis of the merged Swift/UVOT data obtained on 2007-01-10 shows that the candidate optical afterglow was detected in the White, V, B, and U filters, but not in the UV filters. The photometry results are given for the 7 UVOT filters below:
```
Filter	   Tstart    Tstop    Exp       Mag    Error    Significance
White   104        5882     590	     20.0    0.14     9.1
V           210        23205   2065   20.3    0.20     5.7
B           4046     29593   1568   20.9    0.17     7.1
U           5274     35376   3166   20.4    0.10     11.6
UVW1   5069     34757   3758   20.8 (3-sigma UL)
UVM2    4864     33850   2739   21.1 (3-sigma UL)
UVW2   4456     39315   1853   20.9 (3-sigma UL)
```
There is marginal evidence for fading of the optical candidate but confirmation of its fading is pending further analysis. The values quoted above are not corrected for the expected extinction corresponding to E(B-V) of 0.014.
GCN Circular #6010
A.O. Jaunsen (Univ. Oslo), D. Malesani, J.P.U. Fynbo, J. Sollerman (DARK/NBI), P.M. Vreeswijk (ESO), report on behalf of a larger collaboration.
We observed the optical afterglow of GRB 070110 (Krimm et al., GCN 6005; Roming et al., GCN 6009) with the ESO VLT equipped with FORS2. Observations started on 2007 Jan 11.04 UT (17.6 hr after the GRB). Three 1800-s spectra were acquired in the range 3800-8500 AA.
Based on the detection of a DLA and several metallic lines (among which SiII 1260, SiIV 1394,1403, CIV 1548,1551 and many others), we infer a redshift z = 2.352 +- 0.001. We also detect Lyalpha in emission superimposed on the DLA trough. We caution that the wavelength calibration has been performed using archival lamps.
We acknowledge the excellent support from the ESO/Paranal staff.
GCN Report 26.1
GCN_Report 26.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_26_1.pdf by H.A. Krimm at GSFC/USRA titled: "Swift Observations of GRB 070110"
GCN Circular #6014
H. A. Krimm (GSFC/USRA) , P. Boyd (GSFC), V. Mangano (INAF-IASFPA), F. Marshall (GSFC), B. Sbarufatti (INAF-IASFPA), N. Gehrels (GSFC) report on behalf of the Swift Team
Based on its unusual afterglow light curve, the Swift team declares GRB 070110 to be a "burst of interest". Although the burst is 59 degrees from the Sun and moving closer to the Sun, we will continue observations of the afterglow in the U filter over the next several days. We encourage multiwavelength observations of this unusual burst throughout its lightcurve.
Swift observations of GRB 070110 are discussed in GCN Report 26.2 (http://gcn.gsfc.nasa.gov/report_archive.html)
As reported previously, after a very steep drop, the XRT light curve started to rise at T+35 ksec, reaching 3.2 X 10^-2 counts/sec. Then between T+45 ksec and T+75 ksec, the light curve again turned over, dropping to 6 X 10^-3 counts/sec at 100 ksec, before flattening again. Although flares have been observed in other bursts at times > 10 ksec, such behavior (a steep drop followed by a slow rise) has not before been observed in a Swift burst (see for example P. O'Brien et al (2006), ApJ 647, 1213).
The UVOT light curve is even more extraordinary. The afterglow was originally detected at V=20 at T+104 sec and continues to be detectable in all visible filters (V, B and U) with a common power law decay index of -0.47 +- 0.02 in all three filters. At T+203 ksec, the afterglow is seen at V=21.6. Thus the optical light curves do not show any of the extreme variability seen in the X-rays. It is very rare that a burst which was first detected at V=20 is still detectable at T >200 ksec. The afterglow was not detected in the UVW1 filter, with a 3-sigma upper limit of 22.26 for a 4071-sec exposure beginning at T+75 ks. This non-detection is consistent with the redshift z=2.352 reported for the burst (Malesani et al, GCN 6010).
GCN Circular #6015
D. Malesani (NBI/DARK), A.O. Jaunsen (Univ. Oslo), and P.M. Vreeswijk (ESO), report:
We have analyzed the VLT acquisition images of the spectrum of GRB 070110 (Jaunsen et al., GCN 6010). We provide the following astrometric position for the afterglow (J2000):
```
alpha = 00:03:39.27
delta = -52:58:26.9
```
with an error of 0.3". This is consistent with, and improves, the UVOT position (Krimm et al., GCN 6005). The object appears pointlike with a seeing of 0.75".
Based on instrumental zeropoints, we also report a magnitude R~21 on 2006 Jan 11.030 UT (17.34 hr after the GRB). Such a bright magnitude is consistent with the slow decay reported by UVOT (Krimm et al., GCN report 26).
GCN Report 26.2
GCN_Report 26.2 has been posted: http://gcn.gsfc.nasa.gov/reports/report_26_2.pdf by H.A. Krimm at GSFC/USRA titled: "Updates Swift Observations of GRB 070110"
GCN Circular #6017
L. Amati (INAF/IASF Bologna), F. Frontera (Univ. Ferrara and INAF/IASF Bologna), C. Guidorzi (Univ. Milano Bicocca and INAF/OAB), E. Montanari (Univ. Ferrara and ITA "Calvi") report:
"Based on the correlation between power-law photon index and peak energy of GRB spectra measured by Swift/BAT in 15-150 keV (Zhang et al. 2006, astro-ph/0612238, and Sakamoto et al., ApJ, submitted), the photon index of 1.57+/-0.12 measured by BAT for GRB 070110 (Cummings et al, GCN 6007) corresponds to a peak energy Ep of ~110+/-50 keV. From this spectral information and the reported 15-150 keV fluence of (1.6+/-0.1)x10^-6 erg/cm2 (GCN 6007), by assuming a Band spectral shape and by taking into account the redshift of 2.352 (Jaunsen et al., GCN 6010), it is then possible to estimate the values of the intrinsic peak energy, Ep,i ~ 370+/-170 keV, and of the isotropic equivalent radiated energy in the 1-10000 keV cosmological rest frame, Eiso ~ (5.5+/1.5)x10^52 erg (the uncertainties on Ep,i and Eiso take approximately into account the measurements errors, the scatter of the photon index - peak energy correlation and the dependence of Eiso on the values assumed for alpha and beta in the Band spectral model).
These values are consistent within 2 sigma with the Ep,i-Eiso correlation.
If, conservatively, we assume a Band model with alpha equal to the power-law spectral index measured by BAT and beta = -2.3, we find that GRB 070110 is consistent with the Ep,i-Eiso correlation within 2 sigma for a measured Ep up to ~170 keV (E0 ~400 keV), and within 3 sigma for a measured Ep up to ~280 keV (E0 ~650 keV). These values of E0 are well above the upper bound of the BAT energy band used for spectral analysis (150 keV).
Thus, we conclude that, despite the very peculiar behaviour shown by its X-ray afterglow after ~20 ks from the burst onset (Krimm et al., GCN_Report 26.2), GRB 070110 seems to be a common long event from the point of its position in the Ep,i-Eiso plane. This, together with the standard behaviour of the early afterglow light curve (steep decay, flat decay) could indicate that the emission mechanisms / environment originating the prompt emission are not necessarily linked to those producing the LATE afterglow emission."
This message may be cited.
GCN Report 26.3
GCN_Report 26.3 has been posted: http://gcn.gsfc.nasa.gov/reports/report_26_3.pdf by H.A. Krimm at GSFC/USRA titled: "Updated Swift Observations of GRB 070110"
GCN Circular #6019
H. A. Krimm (GSFC/USRA), D. N. Burrows (PSU), M. Chester (PSU), D. Grupe (PSU), V. Mangano (INAF-IASFPA), F. Marshall (GSFC), J. Nousek (PSU), B. Sbarufatti (INAF-IASFPA), N. Gehrels (GSFC) report on behalf of the Swift Team
GRB070110 has been identified as a "Swift Burst of Interest" (Krimm et al, GCN 6014) due to the remarkable irregular light curve seen in X rays, and the long duration and slow fading of the optical emission. We report that the U band emission has now faded below the UVOT threshold of detectability (roughly 23rd magnitude), so the UVOT can no longer follow this GRB, but we project that the optical brightness will continue to slowly fade, making it a possible candidate for late-time optical detection. We are continuing observations with the XRT and we encourage ground-based observers to attempt measurements of the afterglow, if they are capable of detecting an afterglow to our estimate of V=22.7 over the next five days.
The UVOT light curves (Figure 4 in GCN Report 26.3 http://gcn.gsfc.nasa.gov/reports/report_26_3.pdf ) show power-law decays with the following indices. V and B bands (T+1ksec to T+200 ksec): -0.5; U band (T+ 10 ksec to T+500 ksec): -0.7. Converting to magnitudes using the zero points for the filters yields the following fits:
```
Vmag = 21.2 + 1.25*log10(t)
Bmag = 21.9 + 1.25*log10(t)
Umag = 21.8 + 1.75*log10(t).
```
where the time, t, is measured in days from the trigger. For example at 7:00 UT on Jan. 20, 2007, the predicted V magnitude is 22.4.
The X-ray light curve (see Figure 2 in GCN Report 26.3) is decaying very slowly and in fact the three most recent data points suggest a slight upward trend. Fitting the data after the steep drop in flux (from T+35 ksec to T+800 ksec), but excluding the big rise at around T+65 ksec, the best fit decay index is -0.6 +/- 0.1. If the source follows this decay law we predict a count rate in the XRT (0.3-10.0 keV) of 1.5 X 10^-3 cts/sec on Jan. 22, 2007. If it continues to decay at this rate, the source will continue to be bright enough to be observed with the XRT during the month of February 2007.
We note that this source (RA/dec: 0h 03m 39.27s, -52s 58' 26.9", epoch 2000.0) is currently observable from an observatory at -29 degrees latitude and is currently above 30 degrees elevation for approximately 2 hours after astronomical twilight. This time will be only about one hour by the end of January.
GCN Circular #6021
D. Malesani, J.P.U. Fynbo (NBI/Dark), A.O. Jaunsen (Univ. Oslo), and P.M. Vreeswijk (ESO), report on behalf of a larger collaboration:
We observed the optical afterglow of GRB 070110 (Krimm et al., GCN 6005) with the ESO VLT + FORS1. BVRI photometry was secured around Jan 21.05 UT (~10.7 days after the GRB).
Afterglow photometry in the V band shows its magnitude to be V ~ 24, significantly fainter than expected based on the extrapolation of the UVOT decay, which would predict V ~ 22.5 (Krimm et al., GCN 6019; see also GCN report 26.3). We also measure the relative decay in the R band based on comparison with our previous images (Jaunsen et al., GCN 6010; Malesani et al., GCN 6015), and find it steeper than the value reported by UVOT in the U, B and V bands.
The above evidence supports a steepening of the optical light curve of GRB 070110, which possibly occurred some 5 days after the GRB, the time at which the UVOT light curves end.
Further observations are encouraged. We acknowledge excellent support from the observing staff at Paranal.
astro-ph/0702220 from 8 Feb 2007
Troja: Swift observations of GRB 070110: an extraordinary X-ray afterglow powered by the central engine
We present a detailed analysis of Swift multi-wavelength observations of GRB 070110 and its remarkable afterglow. The early X-ray light curve, interpreted as the tail of the prompt emission, displays a spectral evolution already seen in other gamma-ray bursts. The optical afterglow shows a shallow decay up to ~2 d after the burst, which is not consistent with standard afterglow models. The most intriguing feature is a very steep decay in the X-ray flux at ~20 ks after the burst, ending an apparent plateau. The abrupt drop of the X-ray light curve rules out an external shock as the origin of the plateau in this burst and implies long-lasting activity of the central engine. The temporal and spectral properties of the plateau phase point towards a continuous central engine emission rather than the episodic emission of X-ray flares. We suggest that the observed X-ray plateau is powered by a spinning down central engine, possibly a millisecond pulsar, which dissipates energy at an internal radius before depositing energy into the external shock.
1607.08324 from 29 Jul 16
Shuang Du et al.: The radiative efficiency of relativistic jet and wind: A case study of GRB 070110
A rapidly spinning, strongly magnetized neutron star is invoked as the central engine for some Gamma-ray bursts (GRBs), especially, the $"$internal plateau$"$ feature of X-ray afterglow. However, for these $"$internal plateau$"$ GRBs, how to produce their prompt emission remains an open question. Two different physical process have been proposed in the literature, (1) a new-born neutron star is surrounded by a hyper-accreting and neutrino cooling disk, the GRB jet can be powered by neutrino annihilation aligning the spin axis; (2) a differentially rotating millisecond pulsar was formed due to different angular velocity between the interior core and outer shell parts of the neutron star, which can power an episodic GRB jet. In this paper, by analyzing the data of one peculiar GRB 070110 (with internal plateau), we try to test which model being favored. By deriving the physical parameters of magnetar with observational data, the parameter regime for initial period ($P_{0\rm }$) and surface polar cap magnetic field ($B_{\rm p}$) of the central NS are $(0.96\sim 1.2 )~\rm ms$ and $(2.4\sim 3.7)\times 10^{14}~\rm G$, respectively. The radiative efficiency of prompt emission is about $\eta_{\gamma} \sim 6\%$. However, the radiative efficiency of internal plateau ($\eta_{\rm X}$) is larger than $31\%$ assuming the $M_{\rm NS}\sim1.4 M_{\odot}$ and $P_{0\rm }\sim1.2 ~\rm ms$. The clear difference between the radiation efficiencies of prompt emission and internal plateau implies that they maybe originated from different components (e.g. prompt emission from the relativistic jet powered by neutrino annihilation, while the internal plateau from the magnetic outflow wind).

Back to JG's homepage

Jochen Greiner, last update: 29-Jul-2016 [Disclaimer]