TDRSS lightcurve for Trigger=1426088
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 21 Dec 25 05:25:14 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1426088, Seg_Num: 0
GRB_RA: 101.408d {+06h 45m 38s} (J2000),
101.743d {+06h 46m 58s} (current),
100.764d {+06h 43m 03s} (1950)
GRB_DEC: +0.729d {+00d 43' 45"} (J2000),
+0.700d {+00d 42' 00"} (current),
+0.783d {+00d 46' 57"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 7608 [cnts] Image_Peak=207 [image_cnts]
TRIGGER_DUR: 4.096 [sec]
TRIGGER_INDEX: 308 E_range: 50-350 keV
BKG_INTEN: 61914 [cnts]
BKG_TIME: 19411.10 SOD {05:23:31.10} UT
BKG_DUR: 40 [sec]
GRB_DATE: 21030 TJD; 355 DOY; 25/12/21
GRB_TIME: 19471.96 SOD {05:24:31.96} UT
GRB_PHI: 81.99 [deg]
GRB_THETA: 28.67 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 13.96 [sigma]
IMAGE_SIGNIF: 7.35 [sigma]
MERIT_PARAMS: +1 +0 +0 +2 +3 -3 +0 +1 +90 +0
SUN_POSTN: 269.55d {+17h 58m 13s} -23.43d {-23d 26' 03"}
SUN_DIST: 154.37 [deg] Sun_angle= 11.2 [hr] (West of Sun)
MOON_POSTN: 284.04d {+18h 56m 10s} -27.17d {-27d 10' 18"}
MOON_DIST: 153.44 [deg]
MOON_ILLUM: 1 [%]
GAL_COORDS: 211.62, -0.96 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 102.34,-22.22 [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: This trigger occurred at longitude,latitude = 267.68,-7.82 [deg].
COMMENTS:
COMMENTS: NOTE: This BAT event is temporally(3.0<100sec) coincident with the FERMI_GBM event (trignum=787987473).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 21 Dec 25 05:43:03 UT
NOTICE_TYPE: Swift-UVOT Source List
TRIGGER_NUM: 1426088, Seg_Num: 0
POINT_RA: 101.398d {+06h 45m 36s} (J2000)
POINT_DEC: +0.749d {+00d 44' 57"} (J2000)
POINT_ROLL: 154.002d
IMG_START_DATE: 21030 TJD; 355 DOY; 25/12/21
IMG_START_TIME: 20349.91 SOD {05:39:09.91} UT, 878.0 [sec] since BAT Trigger Time
FILTER: 10, White
BKG_MEAN: 3.035
N_STARS: 190
X_OFFSET: 379 [pixels]
Y_OFFSET: 235 [pixels]
X_MAX: 1818 [pixels]
Y_MAX: 1674 [pixels]
DET_THRESH: 14
PHOTO_THRESH: 8
SL_URL: sw01426088000msufc0877.fits
SUN_POSTN: 269.57d {+17h 58m 16s} -23.43d {-23d 26' 04"}
SUN_DIST: 154.40 [deg] Sun_angle= 11.2 [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=1426088). 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 ~1359 counts/sec (15-350 keV), at ~1 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: 16.448 s +/- 1.13499 s
Estimated T50 duration: 7.808 s +/- 0.4098 s
Estimated Peak Interval: MET 787987509.44000006 +/- 0.500000 s
Estimated background rate 1: 3689.687 near MET 787987489.600000 s
Estimated background rate 2: 3728.658 near MET 787987645.568000 s
Estimated total duration: 102.016 s (for data selection)
(from MET 787987494.400000 to MET 787987596.416000)
Estimated total fluence: 7310.921190 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/trigger1426088/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:
Sun Dec 21 00:43:43 EST 2025