TDRSS lightcurve for Trigger=687123

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 21 May 16 20:02:03 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     687123,   Seg_Num: 0
GRB_RA:          293.750d {+19h 35m 00s} (J2000),
                 293.926d {+19h 35m 42s} (current),
                 293.212d {+19h 32m 51s} (1950)
GRB_DEC:         +21.911d {+21d 54' 39"} (J2000),
                 +21.948d {+21d 56' 51"} (current),
                 +21.800d {+21d 47' 59"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       377 [cnts]    Image_Peak=45 [image_cnts]
TRIGGER_DUR:     0.064 [sec] 
TRIGGER_INDEX:   10411     E_range: 15-50 keV
BKG_INTEN:       25773 [cnts]
BKG_TIME:        72095.69 SOD {20:01:35.69} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17529 TJD;   142 DOY;   16/05/21
GRB_TIME:        72107.21 SOD {20:01:47.21} UT
GRB_PHI:         -131.59 [deg]
GRB_THETA:        34.80 [deg]
SOLN_STATUS:     0x18D
RATE_SIGNIF:     14.28 [sigma]
IMAGE_SIGNIF:    6.93 [sigma]
MERIT_PARAMS:     +0  +0 +124  -4  +1  -3  +0  +1 +37  +0 
SUN_POSTN:        59.05d {+03h 56m 13s}  +20.39d {+20d 23' 40"}
SUN_DIST:        111.72 [deg]   Sun_angle= 8.3 [hr] (West of Sun)
MOON_POSTN:      239.53d {+15h 58m 07s}  -15.66d {-15d 39' 45"}
MOON_DIST:        65.23 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:       57.27,  0.81 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      300.64, 42.86 [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=10762=sgr1935p2154,   delta=0.021 [deg].  
COMMENTS:        This matches a source in the ground catalog: sgr1935p2154,   delta=0.021 [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 = 65.94,-20.03 [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:     Sat 21 May 16 20:18:41 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     687123,   Seg_Num: 0
GRB_RA:          293.750d {+19h 35m 00s} (J2000),
                 293.926d {+19h 35m 42s} (current),
                 293.212d {+19h 32m 51s} (1950)
GRB_DEC:         +21.911d {+21d 54' 39"} (J2000),
                 +21.948d {+21d 56' 51"} (current),
                 +21.800d {+21d 47' 59"} (1950)
GRB_DATE:        17529 TJD;   142 DOY;   16/05/21
GRB_TIME:        72107.34 SOD {20:01:47.34} UT
TRIGGER_INDEX:   10411
GRB_PHI:         -131.59 [deg]
GRB_THETA:        34.80 [deg]
DELTA_TIME:      -43.00 [sec]
TRIGGER_DUR:     0.064 [sec] 
SOLN_STATUS:     0x18D
RATE_SIGNIF:     14.28 [sigma]
IMAGE_SIGNIF:    6.93 [sigma]
LC_URL:          sw00687123000msb.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

Extended TDRSS lc No.4

Plot creation:
Sat May 21 16:19:02 EDT 2016