TDRSS lightcurve for Trigger=1344131
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 21 Aug 25 10:46:42 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1344131, Seg_Num: 0
GRB_RA: 358.412d {+23h 53m 39s} (J2000),
358.743d {+23h 54m 58s} (current),
357.766d {+23h 51m 04s} (1950)
GRB_DEC: -28.618d {-28d 37' 05"} (J2000),
-28.476d {-28d 28' 31"} (current),
-28.896d {-28d 53' 46"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 2786 [cnts] Image_Peak=124 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 484 E_range: 50-350 keV
BKG_INTEN: 12480 [cnts]
BKG_TIME: 38763.81 SOD {10:46:03.81} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20908 TJD; 233 DOY; 25/08/21
GRB_TIME: 38777.31 SOD {10:46:17.31} UT
GRB_PHI: 168.42 [deg]
GRB_THETA: 33.82 [deg]
SOLN_STATUS: 0x83
RATE_SIGNIF: 28.14 [sigma]
IMAGE_SIGNIF: 6.65 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +3 -4 +0 +0 +86 +0
SUN_POSTN: 150.79d {+10h 03m 09s} +11.95d {+11d 56' 43"}
SUN_DIST: 149.13 [deg] Sun_angle= 10.1 [hr] (West of Sun)
MOON_POSTN: 129.66d {+08h 38m 39s} +22.04d {+22d 02' 10"}
MOON_DIST: 135.45 [deg]
MOON_ILLUM: 4 [%]
GAL_COORDS: 22.92,-77.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 346.37,-25.45 [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 = 183.13,9.34 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 21 Aug 25 11:06:15 UT
NOTICE_TYPE: Swift-UVOT Source List
TRIGGER_NUM: 1344131, Seg_Num: 0
POINT_RA: 358.414d {+23h 53m 39s} (J2000)
POINT_DEC: -28.616d {-28d 36' 58"} (J2000)
POINT_ROLL: 117.216d
IMG_START_DATE: 20908 TJD; 233 DOY; 25/08/21
IMG_START_TIME: 39648.77 SOD {11:00:48.77} UT, 871.5 [sec] since BAT Trigger Time
FILTER: 10, White
BKG_MEAN: 1.781
N_STARS: 60
X_OFFSET: 242 [pixels]
Y_OFFSET: 332 [pixels]
X_MAX: 1681 [pixels]
Y_MAX: 1771 [pixels]
DET_THRESH: 11
PHOTO_THRESH: 5
SL_URL: sw01344131000msufc0871.fits
SUN_POSTN: 150.80d {+10h 03m 12s} +11.94d {+11d 56' 27"}
SUN_DIST: 149.14 [deg] Sun_angle= 10.1 [hr] (West of Sun)
GCN template for BAT paragraph
Click here!
At :: UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB ***A*** (trigger=1344131). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec , which is
RA(J2000) = h m s
Dec(J2000) = d ' "
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a [**double-peaked**]
structure with a duration of about TTT sec. The peak count rate
was ~2476 counts/sec (15-350 keV), at ~0 sec after the trigger.
Test version of draft template
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
Tilan's background subtracted TDRSS light curves
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
TDRSS extended lightcurve from T0-1 to T0+2
T50 and T90 calculation
******************************************
battblocks v1.18
------------------------------------------
Input Data: bat_raw_lc.fits
Output GTI: bb.gti
Events to Skip: 128 Changepoint log(prob) Prior: 6.000000
Internal Tick: 1.000000e-04 s
Lookback time: 0 s
Bkg. Subtract?: yes (for fluence/T50/T90 calculations)
------------------------------------------
Estimated T90 duration: 22.656 s +/- 0.729712 s
Estimated T50 duration: 15.104 s +/- 1.28 s
Estimated Peak Interval: MET 777466014.07999992 +/- 0.500000 s
Estimated background rate 1: 4002.356 near MET 777466000.896000 s
Estimated background rate 2: 3768.591 near MET 777466143.424000 s
Estimated total duration: 75.136 s (for data selection)
(from MET 777466012.992000 to MET 777466088.128000)
Estimated total fluence: 3154.356668 count
Created GTI with 6 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 0.083
Usage: bat_grb_pos_cat.sh []
Searches through the BAT GRB position (all numbers in degrees)
Search for this GRB position to the source locations in BAT transient monitor (search radius within 12 arcmin)
python compare_catalog.py
No match
Link to SIMBAD
Click here for the SIMBAD search!
Frank's UVOT result
Click here!
Frank's UVOT Blinking images
Click here!
Elevation angle of GRB/Sun at the ground telescope locations
Usage elevation_grd_obs.sh (ra) (dec) (UT year) (UT month) (UT day) (UT hour)
The data/results are in /local/data/bat1/prebascript/trigger1344131/tdrss_ql/
bat_raw_lc.fits : TDRSS FITS light curve from GCN
gcn_position.txt : GCN BAT position notice
ratelc_tdrss.qdp : QDP file of the TDRSS light curve
tdrss_lc.gif : GIF TDRSS light curve
sc_att.qdp : QDP file of the spacecraft attitude
sc_att.gif : GIF spacecraft attitude
bb.gti : Bayesian block GTI file (battblocks)
dur.gti : Duration GTI file (battblocks)
battblocks.log : Output log of battblocks
Plot creation:
Thu Aug 21 07:07:03 EDT 2025