TDRSS lightcurve for Trigger=631946

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 21 Feb 15 00:02:09 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     631946,   Seg_Num: 0
GRB_RA:          267.227d {+17h 48m 54s} (J2000),
                 267.452d {+17h 49m 49s} (current),
                 266.483d {+17h 45m 56s} (1950)
GRB_DEC:         -20.379d {-20d 22' 42"} (J2000),
                 -20.383d {-20d 22' 56"} (current),
                 -20.363d {-20d 21' 47"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=11165 [image_cnts]
TRIGGER_DUR:     1344.000 [sec]   (=22.4 [min])
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:        17073 TJD;    51 DOY;   15/02/20
GRB_TIME:        85130.78 SOD {23:38:50.78} UT
GRB_PHI:          29.74 [deg]
GRB_THETA:        14.55 [deg]
SOLN_STATUS:     0x19D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    6.99 [sigma]
MERIT_PARAMS:     +0  +0 +95  +5  +1  -3  +0  +1 -42  +0 
SUN_POSTN:       334.02d {+22h 16m 05s}  -10.75d {-10d 45' 05"}
SUN_DIST:         64.46 [deg]   Sun_angle= 4.4 [hr] (West of Sun)
MOON_POSTN:        0.01d {+00h 00m 03s}   +1.10d {+01d 05' 56"}
MOON_DIST:        92.78 [deg]
MOON_ILLUM:      6 [%]
GAL_COORDS:        7.72,  3.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      267.40,  3.04 [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 matches a source in the on-board catalog: Num=15074=(null) (probably an AT_Slot).  
COMMENTS:        This matches a source in the ground catalog: H1745-203,   delta=0.012 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 190.91,16.68 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 21 Feb 15 00:10:17 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     631946,   Seg_Num: 0
GRB_RA:          267.227d {+17h 48m 54s} (J2000),
                 267.452d {+17h 49m 49s} (current),
                 266.483d {+17h 45m 56s} (1950)
GRB_DEC:         -20.379d {-20d 22' 42"} (J2000),
                 -20.383d {-20d 22' 56"} (current),
                 -20.363d {-20d 21' 47"} (1950)
GRB_DATE:        17073 TJD;    51 DOY;   15/02/20
GRB_TIME:        85130.78 SOD {23:38:50.78} UT
TRIGGER_INDEX:   20000
GRB_PHI:          29.74 [deg]
GRB_THETA:        14.55 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     1344.000 [sec]   (=22.4 [min])
SOLN_STATUS:     0x19D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    6.99 [sigma]
LC_URL:          sw00631946000msb.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 Feb 20 19:10:43 EST 2015