TDRSS lightcurve for Trigger=1401726
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 05 Oct 25 16:07:18 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1401726, Seg_Num: 0
GRB_RA: 75.673d {+05h 02m 42s} (J2000),
76.046d {+05h 04m 11s} (current),
74.951d {+04h 59m 48s} (1950)
GRB_DEC: +16.882d {+16d 52' 54"} (J2000),
+16.917d {+16d 55' 00"} (current),
+16.811d {+16d 48' 40"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 4374 [cnts] Image_Peak=338 [image_cnts]
TRIGGER_DUR: 1.408 [sec]
TRIGGER_INDEX: 485 E_range: 50-350 keV
BKG_INTEN: 26767 [cnts]
BKG_TIME: 57987.54 SOD {16:06:27.54} UT
BKG_DUR: 16 [sec]
GRB_DATE: 20953 TJD; 278 DOY; 25/10/05
GRB_TIME: 58013.91 SOD {16:06:53.91} UT
GRB_PHI: -3.88 [deg]
GRB_THETA: 31.44 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 35.77 [sigma]
IMAGE_SIGNIF: 13.73 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +3 +3 +0 +0 +44 +0
SUN_POSTN: 191.66d {+12h 46m 38s} -5.00d {-05d 00' 15"}
SUN_DIST: 115.94 [deg] Sun_angle= 7.7 [hr] (West of Sun)
MOON_POSTN: 352.68d {+23h 30m 44s} -2.76d {-02d 45' 26"}
MOON_DIST: 84.46 [deg]
MOON_ILLUM: 97 [%]
GAL_COORDS: 184.66,-14.87 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 76.23, -5.88 [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 = 152.37,20.35 [deg].
COMMENTS:
COMMENTS: NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=781373219).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 05 Oct 25 16:27:56 UT
NOTICE_TYPE: Swift-UVOT Source List
TRIGGER_NUM: 1401726, Seg_Num: 0
POINT_RA: 75.675d {+05h 02m 42s} (J2000)
POINT_DEC: +16.878d {+16d 52' 41"} (J2000)
POINT_ROLL: 87.256d
IMG_START_DATE: 20953 TJD; 278 DOY; 25/10/05
IMG_START_TIME: 58879.97 SOD {16:21:19.97} UT, 866.1 [sec] since BAT Trigger Time
FILTER: 10, White
BKG_MEAN: 3.185
N_STARS: 161
X_OFFSET: 215 [pixels]
Y_OFFSET: 295 [pixels]
X_MAX: 1654 [pixels]
Y_MAX: 1734 [pixels]
DET_THRESH: 15
PHOTO_THRESH: 8
SL_URL: sw01401726000msufc0866.fits
SUN_POSTN: 191.67d {+12h 46m 41s} -5.01d {-05d 00' 35"}
SUN_DIST: 115.95 [deg] Sun_angle= 7.7 [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=1401726). 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 ~5007 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: 50.048 s +/- 2.89772 s
Estimated T50 duration: 0.896 s +/- 0.128 s
Estimated Peak Interval: MET 781373251.51999998 +/- 0.500000 s
Estimated background rate 1: 4307.926 near MET 781373237.952000 s
Estimated background rate 2: 4437.655 near MET 781373367.936000 s
Estimated total duration: 50.048 s (for data selection)
(from MET 781373250.304000 to MET 781373300.352000)
Estimated total fluence: 4840.269078 count
Created GTI with 8 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/trigger1401726/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 Oct 5 12:29:03 EDT 2025