TDRSS lightcurve for Trigger=277356

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 27 Apr 07 08:31:24 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     277356,   Seg_Num: 0
GRB_RA:           28.862d {+01h 55m 27s} (J2000),
                  28.945d {+01h 55m 47s} (current),
                  28.291d {+01h 53m 10s} (1950)
GRB_DEC:         -27.633d {-27d 37' 57"} (J2000),
                 -27.597d {-27d 35' 49"} (current),
                 -27.877d {-27d 52' 38"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4855 [cnts]    Image_Peak=248 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 15-50 keV
BKG_INTEN:       31675 [cnts]
BKG_TIME:        30654.08 SOD {08:30:54.08} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14217 TJD;   117 DOY;   07/04/27
GRB_TIME:        30668.93 SOD {08:31:08.93} UT
GRB_PHI:         -27.71 [deg]
GRB_THETA:        14.80 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.78 [sigma]
IMAGE_SIGNIF:    8.85 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  +9 -100  +0 -74  +1 
SUN_POSTN:        34.38d {+02h 17m 32s}  +13.76d {+13d 45' 23"}
SUN_DIST:         41.69 [deg]   Sun_angle= 0.4 [hr] (West of Sun)
MOON_POSTN:      163.13d {+10h 52m 31s}   +7.56d {+07d 33' 34"}
MOON_DIST:       132.32 [deg]
MOON_ILLUM:      79 [%]
GAL_COORDS:      218.65,-75.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       15.00,-36.56 [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 = 73.69,-18.94 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 27 Apr 07 08:47:56 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     277356,   Seg_Num: 0
GRB_RA:           28.862d {+01h 55m 27s} (J2000),
                  28.945d {+01h 55m 47s} (current),
                  28.291d {+01h 53m 10s} (1950)
GRB_DEC:         -27.633d {-27d 37' 57"} (J2000),
                 -27.597d {-27d 35' 49"} (current),
                 -27.877d {-27d 52' 38"} (1950)
GRB_DATE:        14217 TJD;   117 DOY;   07/04/27
GRB_TIME:        30668.93 SOD {08:31:08.93} UT
TRIGGER_INDEX:   146
GRB_PHI:         -27.71 [deg]
GRB_THETA:        14.80 [deg]
DELTA_TIME:      -43.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.78 [sigma]
IMAGE_SIGNIF:    8.85 [sigma]
LC_URL:          sw00277356000msb.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:
Fri Apr 27 04:48:28 EDT 2007