TDRSS lightcurve for Trigger=519874

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 11 Apr 12 01:17:00 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     519874,   Seg_Num: 0
GRB_RA:           35.550d {+02h 22m 12s} (J2000),
                  35.775d {+02h 23m 06s} (current),
                  34.636d {+02h 18m 33s} (1950)
GRB_DEC:         +59.746d {+59d 44' 46"} (J2000),
                 +59.802d {+59d 48' 05"} (current),
                 +59.518d {+59d 31' 06"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       292 [cnts]    Image_Peak=39 [image_cnts]
TRIGGER_DUR:     0.064 [sec] 
TRIGGER_INDEX:   10427     E_range: 50-350 keV
BKG_INTEN:       21369 [cnts]
BKG_TIME:        4583.91 SOD {01:16:23.91} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16028 TJD;   102 DOY;   12/04/11
GRB_TIME:        4598.95 SOD {01:16:38.95} UT
GRB_PHI:         -164.06 [deg]
GRB_THETA:        29.92 [deg]
SOLN_STATUS:     0x83
RATE_SIGNIF:     8.24 [sigma]
IMAGE_SIGNIF:    6.51 [sigma]
MERIT_PARAMS:     +1  +0  +0  -4  +3  -4  +0  +1 -60  +0 
SUN_POSTN:        19.93d {+01h 19m 43s}   +8.40d {+08d 24' 17"}
SUN_DIST:         52.77 [deg]   Sun_angle= -1.1 [hr] (East of Sun)
MOON_POSTN:      259.87d {+17h 19m 29s}  -21.95d {-21d 57' 03"}
MOON_DIST:       131.16 [deg]
MOON_ILLUM:      76 [%]
GAL_COORDS:      134.14, -1.14 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       56.20, 42.53 [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 = 181.57,19.78 [deg].  
COMMENTS:        This AT will self-cancel at the end of the first orbit (ie I_signif<7.0 && Trig_dur<65msec).  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 11 Apr 12 01:24:30 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     519874,   Seg_Num: 0
GRB_RA:           35.550d {+02h 22m 12s} (J2000),
                  35.775d {+02h 23m 06s} (current),
                  34.636d {+02h 18m 33s} (1950)
GRB_DEC:         +59.746d {+59d 44' 46"} (J2000),
                 +59.802d {+59d 48' 05"} (current),
                 +59.518d {+59d 31' 06"} (1950)
GRB_DATE:        16028 TJD;   102 DOY;   12/04/11
GRB_TIME:        4599.03 SOD {01:16:39.03} UT
TRIGGER_INDEX:   10427
GRB_PHI:         -164.06 [deg]
GRB_THETA:        29.92 [deg]
DELTA_TIME:      -72.00 [sec]
TRIGGER_DUR:     0.064 [sec] 
SOLN_STATUS:     0x83
RATE_SIGNIF:     8.24 [sigma]
IMAGE_SIGNIF:    6.51 [sigma]
LC_URL:          sw00519874000msb.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

Plot creation:
Tue Apr 10 21:24:45 EDT 2012