TDRSS lightcurve for Trigger=549841

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 27 Feb 13 01:21:58 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     549841,   Seg_Num: 0
GRB_RA:          272.183d {+18h 08m 44s} (J2000),
                 272.379d {+18h 09m 31s} (current),
                 271.439d {+18h 05m 45s} (1950)
GRB_DEC:         -20.393d {-20d 23' 33"} (J2000),
                 -20.390d {-20d 23' 22"} (current),
                 -20.401d {-20d 24' 04"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       499 [cnts]    Image_Peak=92 [image_cnts]
TRIGGER_DUR:     0.032 [sec] 
TRIGGER_INDEX:   10309     E_range: 15-50 keV
BKG_INTEN:       34558 [cnts]
BKG_TIME:        4885.73 SOD {01:21:25.73} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16350 TJD;    58 DOY;   13/02/27
GRB_TIME:        4900.77 SOD {01:21:40.77} UT
GRB_PHI:          11.91 [deg]
GRB_THETA:         6.57 [deg]
SOLN_STATUS:     0x10D
RATE_SIGNIF:     29.91 [sigma]
IMAGE_SIGNIF:    10.59 [sigma]
MERIT_PARAMS:     +0  +0 +124  -5  +1  +0  +0  +1 -39  +0 
SUN_POSTN:       340.23d {+22h 40m 56s}   -8.34d {-08d 20' 25"}
SUN_DIST:         66.41 [deg]   Sun_angle= 4.5 [hr] (West of Sun)
MOON_POSTN:      172.30d {+11h 29m 12s}   -1.28d {-01d 16' 33"}
MOON_DIST:        98.99 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       10.02, -0.25 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      272.05,  3.03 [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=10201=SGR1806-20,   delta=0.028 [deg].  
COMMENTS:        This matches a source in the ground catalog: SGR1806-20,   delta=0.028 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 105.93,6.82 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 27 Feb 13 01:36:13 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     549841,   Seg_Num: 0
GRB_RA:          272.183d {+18h 08m 44s} (J2000),
                 272.379d {+18h 09m 31s} (current),
                 271.439d {+18h 05m 45s} (1950)
GRB_DEC:         -20.393d {-20d 23' 33"} (J2000),
                 -20.390d {-20d 23' 22"} (current),
                 -20.401d {-20d 24' 04"} (1950)
GRB_DATE:        16350 TJD;    58 DOY;   13/02/27
GRB_TIME:        4900.82 SOD {01:21:40.82} UT
TRIGGER_INDEX:   10309
GRB_PHI:          11.91 [deg]
GRB_THETA:         6.57 [deg]
DELTA_TIME:      -69.00 [sec]
TRIGGER_DUR:     0.032 [sec] 
SOLN_STATUS:     0x10D
RATE_SIGNIF:     29.91 [sigma]
IMAGE_SIGNIF:    10.59 [sigma]
LC_URL:          sw00549841000msb.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

Extended TDRSS light curve and spacecraft attitude plot(s)

Extended TDRSS lc No.1

Extended TDRSS lc No.2

Extended TDRSS lc No.3

Plot creation:
Tue Feb 26 20:36:44 EST 2013