TDRSS lightcurve for Trigger=420256

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 23 Apr 10 02:45:27 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     420256,   Seg_Num: 0
GRB_RA:          271.841d {+18h 07m 22s} (J2000),
                 271.944d {+18h 07m 47s} (current),
                 271.344d {+18h 05m 22s} (1950)
GRB_DEC:         +27.172d {+27d 10' 18"} (J2000),
                 +27.174d {+27d 10' 25"} (current),
                 +27.164d {+27d 09' 51"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1566 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
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:        15309 TJD;   113 DOY;   10/04/23
GRB_TIME:        9842.26 SOD {02:44:02.26} UT
GRB_PHI:         173.27 [deg]
GRB_THETA:        36.28 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.02 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -3  +0  +0 +31  +0 
SUN_POSTN:        30.65d {+02h 02m 35s}  +12.46d {+12d 27' 39"}
SUN_DIST:        108.58 [deg]   Sun_angle= 7.9 [hr] (West of Sun)
MOON_POSTN:      142.13d {+09h 28m 32s}  +11.70d {+11d 41' 43"}
MOON_DIST:       117.72 [deg]
MOON_ILLUM:      66 [%]
GAL_COORDS:       53.57, 21.07 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      272.58, 50.59 [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 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:        This trigger occurred at longitude,latitude = 85.34,19.71 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 23 Apr 10 03:01:00 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     420256,   Seg_Num: 0
GRB_RA:          271.841d {+18h 07m 22s} (J2000),
                 271.944d {+18h 07m 47s} (current),
                 271.344d {+18h 05m 22s} (1950)
GRB_DEC:         +27.172d {+27d 10' 18"} (J2000),
                 +27.174d {+27d 10' 25"} (current),
                 +27.164d {+27d 09' 51"} (1950)
GRB_DATE:        15309 TJD;   113 DOY;   10/04/23
GRB_TIME:        9842.26 SOD {02:44:02.26} UT
TRIGGER_INDEX:   20000
GRB_PHI:         173.27 [deg]
GRB_THETA:        36.28 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.02 [sigma]
LC_URL:          sw00420256000msb.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:
Thu Apr 22 23:01:50 EDT 2010