TDRSS lightcurve for Trigger=824451

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 11 Apr 18 12:28:01 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     824451,   Seg_Num: 0
GRB_RA:          356.829d {+23h 47m 19s} (J2000),
                 357.051d {+23h 48m 12s} (current),
                 356.228d {+23h 44m 55s} (1950)
GRB_DEC:         +66.791d {+66d 47' 26"} (J2000),
                 +66.892d {+66d 53' 32"} (current),
                 +66.513d {+66d 30' 46"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       5755 [cnts]    Image_Peak=545 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       25318 [cnts]
BKG_TIME:        44851.23 SOD {12:27:31.23} UT
BKG_DUR:         8 [sec]
GRB_DATE:        18219 TJD;   101 DOY;   18/04/11
GRB_TIME:        44863.71 SOD {12:27:43.71} UT
GRB_PHI:          17.91 [deg]
GRB_THETA:        19.48 [deg]
SOLN_STATUS:     0x20002003
RATE_SIGNIF:     41.30 [sigma]
IMAGE_SIGNIF:    18.13 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +5  +0  +1 -49  +0 
SUN_POSTN:        19.94d {+01h 19m 46s}   +8.41d {+08d 24' 34"}
SUN_DIST:         60.52 [deg]   Sun_angle= 1.5 [hr] (West of Sun)
MOON_POSTN:      329.39d {+21h 57m 33s}  -13.72d {-13d 43' 07"}
MOON_DIST:        83.13 [deg]
MOON_ILLUM:      21 [%]
GAL_COORDS:      116.66,  4.70 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       41.29, 58.42 [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:        There is a bright star (mag=5.95) 4.20 arcmin from this position.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 316.10,14.88 [deg].  
COMMENTS:           

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 11 Apr 18 12:44:49 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     824451,   Seg_Num: 0
GRB_RA:          356.829d {+23h 47m 19s} (J2000),
                 357.051d {+23h 48m 12s} (current),
                 356.228d {+23h 44m 55s} (1950)
GRB_DEC:         +66.791d {+66d 47' 26"} (J2000),
                 +66.892d {+66d 53' 32"} (current),
                 +66.513d {+66d 30' 46"} (1950)
GRB_DATE:        18219 TJD;   101 DOY;   18/04/11
GRB_TIME:        44863.71 SOD {12:27:43.71} UT
TRIGGER_INDEX:   146
GRB_PHI:          17.91 [deg]
GRB_THETA:        19.48 [deg]
DELTA_TIME:      32.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     41.30 [sigma]
IMAGE_SIGNIF:    18.13 [sigma]
LC_URL:          sw00824451000msb.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:
Wed Apr 11 08:45:03 EDT 2018