TDRSS lightcurve for Trigger=280846

Notes:

• 1) None of the TDRSS light curves are background subtracted.

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 30 May 07 07:44:41 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     280846,   Seg_Num: 0
GRB_RA:          278.828d {+18h 35m 19s} (J2000),
                 278.950d {+18h 35m 48s} (current),
                 278.009d {+18h 32m 02s} (1950)
GRB_DEC:         -32.972d {-32d 58' 19"} (J2000),
                 -32.966d {-32d 57' 56"} (current),
                 -33.013d {-33d 00' 45"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       7050 [cnts]    Image_Peak=213 [image_cnts]
TRIGGER_DUR:     2.048 [sec] 
TRIGGER_INDEX:   248     E_range: 15-25 keV
BKG_INTEN:       75998 [cnts]
BKG_TIME:        27822.01 SOD {07:43:42.01} UT
BKG_DUR:         24 [sec]
GRB_DATE:        14250 TJD;   150 DOY;   07/05/30
GRB_TIME:        27855.48 SOD {07:44:15.48} UT
GRB_PHI:         -56.98 [deg]
GRB_THETA:        11.27 [deg]
SOLN_STATUS:     0x58D
RATE_SIGNIF:     6.40 [sigma]
IMAGE_SIGNIF:    6.72 [sigma]
MERIT_PARAMS:     +0  +0 +100  +1  +0  -3  +0  +1 +86  +1 
SUN_POSTN:        66.81d {+04h 27m 15s}  +21.73d {+21d 43' 38"}
SUN_DIST:        149.47 [deg]   Sun_angle= 9.9 [hr] (West of Sun)
MOON_POSTN:      225.44d {+15h 01m 46s}  -21.91d {-21d 54' 37"}
MOON_DIST:        48.24 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:        1.51,-11.28 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      277.51, -9.76 [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 matches a source in the on-board catalog: Num=10353=X 1832-330,   delta=0.086 [deg].  
COMMENTS:        This matches a source in the ground catalog: X 1832-330,   delta=0.086 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 218.01,-20.34 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 30 May 07 07:48:10 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     280846,   Seg_Num: 0
GRB_RA:          278.828d {+18h 35m 19s} (J2000),
                 278.950d {+18h 35m 48s} (current),
                 278.009d {+18h 32m 02s} (1950)
GRB_DEC:         -32.972d {-32d 58' 19"} (J2000),
                 -32.966d {-32d 57' 56"} (current),
                 -33.013d {-33d 00' 45"} (1950)
GRB_DATE:        14250 TJD;   150 DOY;   07/05/30
GRB_TIME:        27855.48 SOD {07:44:15.48} UT
TRIGGER_INDEX:   248
GRB_PHI:         -56.98 [deg]
GRB_THETA:        11.27 [deg]
DELTA_TIME:      12.00 [sec]
TRIGGER_DUR:     2.048 [sec] 
SOLN_STATUS:     0x58D
RATE_SIGNIF:     6.40 [sigma]
IMAGE_SIGNIF:    6.72 [sigma]
LC_URL:          sw00280846000msb.lc

Initial TDRSS lightcurve and spacecraft attitude plot

TDRSS lightcurve from T0-30 to T0+50 (zoom in)

TDRSS light curve from T0-1 to T0+2 (More zoom in)

1.6s binned TDRSS light curve

Plot creation:
Wed May 30 03:49:07 EDT 2007