TDRSS lightcurve for Trigger=228720

Notes:

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

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 09 Sep 06 07:22:51 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     228720,   Seg_Num: 0
GRB_RA:           28.447d {+01h 53m 47s} (J2000),
                  28.520d {+01h 54m 05s} (current),
                  27.904d {+01h 51m 37s} (1950)
GRB_DEC:         -36.360d {-36d 21' 35"} (J2000),
                 -36.327d {-36d 19' 37"} (current),
                 -36.605d {-36d 36' 18"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=987 [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:        13987 TJD;   252 DOY;   06/09/09
GRB_TIME:        26494.56 SOD {07:21:34.56} UT
GRB_PHI:           2.35 [deg]
GRB_THETA:        36.78 [deg]
SOLN_STATUS:     0x19D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.54 [sigma]
MERIT_PARAMS:     +0  +0 +100  +6  +1  -5  +0  +0 +66  +1 
SUN_POSTN:       167.56d {+11h 10m 15s}   +5.33d {+05d 20' 02"}
SUN_DIST:        131.36 [deg]   Sun_angle= 9.3 [hr] (West of Sun)
MOON_POSTN:        6.88d {+00h 27m 31s}   +4.13d {+04d 07' 59"}
MOON_DIST:        45.23 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      251.72,-73.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        9.31,-44.15 [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 matches a source in the on-board catalog.  
COMMENTS:        This matches a source in the ground catalog: sw028.3-36.2,   delta=0.183 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.  
COMMENTS:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
COMMENTS:        This trigger occurred at longitude,latitude = 274.23,18.51 [deg].  

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 09 Sep 06 07:25:16 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     228720,   Seg_Num: 0
GRB_RA:           28.447d {+01h 53m 47s} (J2000),
                  28.520d {+01h 54m 05s} (current),
                  27.904d {+01h 51m 37s} (1950)
GRB_DEC:         -36.360d {-36d 21' 35"} (J2000),
                 -36.327d {-36d 19' 37"} (current),
                 -36.605d {-36d 36' 18"} (1950)
GRB_DATE:        13987 TJD;   252 DOY;   06/09/09
GRB_TIME:        26494.56 SOD {07:21:34.56} UT
TRIGGER_INDEX:   20000
GRB_PHI:           2.35 [deg]
GRB_THETA:        36.78 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x19D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.54 [sigma]
LC_URL:          sw00228720000msb.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

Plot creation:
Sat Sep  9 03:26:26 EDT 2006