TDRSS lightcurve for Trigger=180931

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 09 Feb 06 19:09:09 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     180931,   Seg_Num: 0
GRB_RA:           65.454d {+04h 21m 49s} (J2000),
                  65.583d {+04h 22m 20s} (current),
                  64.399d {+04h 17m 36s} (1950)
GRB_DEC:         +58.730d {+58d 43' 47"} (J2000),
                 +58.744d {+58d 44' 38"} (current),
                 +58.612d {+58d 36' 42"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       171 [cnts]    Image_Peak=32 [image_cnts]
TRIGGER_DUR:     0.032 [sec] 
TRIGGER_INDEX:   10329     E_range: 50-350 keV
BKG_INTEN:       24109 [cnts]
BKG_TIME:        68926.99 SOD {19:08:46.99} UT
BKG_DUR:         8 [sec]
GRB_DATE:        13775 TJD;    40 DOY;   06/02/09
GRB_TIME:        68935.95 SOD {19:08:55.95} UT
GRB_PHI:         -174.84 [deg]
GRB_THETA:        12.05 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     8.60 [sigma]
IMAGE_SIGNIF:    6.75 [sigma]
MERIT_PARAMS:     +1  +0  +0  -5  +3  -1  +0  +1 +31  +1 
SUN_POSTN:       323.29d {+21h 33m 09s}  -14.53d {-14d 31' 44"}
SUN_DIST:        108.75 [deg]   Sun_angle= -6.8 [hr] (East of Sun)
MOON_POSTN:      105.21d {+07h 00m 51s}  +27.83d {+27d 49' 34"}
MOON_DIST:        41.20 [deg]
MOON_ILLUM:      90 [%]
GAL_COORDS:      147.44,  6.26 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       74.42, 36.61 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 354.80,20.21 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 09 Feb 06 19:12:36 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     180931,   Seg_Num: 0
GRB_RA:           65.454d {+04h 21m 49s} (J2000),
                  65.583d {+04h 22m 20s} (current),
                  64.399d {+04h 17m 36s} (1950)
GRB_DEC:         +58.730d {+58d 43' 47"} (J2000),
                 +58.744d {+58d 44' 38"} (current),
                 +58.612d {+58d 36' 42"} (1950)
GRB_DATE:        13775 TJD;    40 DOY;   06/02/09
GRB_TIME:        68936.19 SOD {19:08:56.19} UT
TRIGGER_INDEX:   10329
GRB_PHI:         -174.84 [deg]
GRB_THETA:        12.05 [deg]
DELTA_TIME:      40.00 [sec]
TRIGGER_DUR:     0.032 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     8.60 [sigma]
IMAGE_SIGNIF:    6.75 [sigma]
LC_URL:          sw00180931000msb.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:
Thu Feb  9 14:14:04 EST 2006