TDRSS lightcurve for Trigger=1420873
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 05 Dec 25 23:40:57 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1420873, Seg_Num: 0
GRB_RA: 200.243d {+13h 20m 58s} (J2000),
200.547d {+13h 22m 11s} (current),
199.658d {+13h 18m 38s} (1950)
GRB_DEC: +29.962d {+29d 57' 45"} (J2000),
+29.827d {+29d 49' 38"} (current),
+30.224d {+30d 13' 27"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 24752 [cnts] Image_Peak=445 [image_cnts]
TRIGGER_DUR: 12.160 [sec]
TRIGGER_INDEX: 478 E_range: 25-100 keV
BKG_INTEN: 118637 [cnts]
BKG_TIME: 85091.19 SOD {23:38:11.19} UT
BKG_DUR: 64 [sec]
GRB_DATE: 21014 TJD; 339 DOY; 25/12/05
GRB_TIME: 85187.25 SOD {23:39:47.25} UT
GRB_PHI: 98.93 [deg]
GRB_THETA: 26.05 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 10.00 [sigma]
IMAGE_SIGNIF: 7.81 [sigma]
MERIT_PARAMS: +1 +0 +0 +4 +2 -2 +0 +0 -29 +0
SUN_POSTN: 252.75d {+16h 51m 00s} -22.49d {-22d 29' 15"}
SUN_DIST: 72.48 [deg] Sun_angle= 3.5 [hr] (West of Sun)
MOON_POSTN: 88.22d {+05h 52m 54s} +28.24d {+28d 14' 09"}
MOON_DIST: 93.15 [deg]
MOON_ILLUM: 98 [%]
GAL_COORDS: 58.27, 82.92 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 185.37, 35.27 [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 = 168.30,8.61 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 06 Dec 25 00:04:51 UT
NOTICE_TYPE: SWIFT Actual Pointing Direction
CURR_POINT_RA: 314.542d {+20h 58m 10s} (J2000)
CURR_POINT_DEC: +5.230d {+05d 13' 47"} (J2000)
CURR_POINT_ROLL: 238.548d
SLEW_TIME: 86286.26 SOD {23:58:06.26} UT
SLEW_DATE: 21014 TJD; 339 DOY; 25/12/05
TGT_NUM: 98084, Seg_Num: 11
SUN_POSTN: 252.77d {+16h 51m 04s} -22.49d {-22d 29' 22"}
SUN_DIST: 66.74 [deg] Sun_angle= -4.1 [hr] (East of Sun)
MOON_POSTN: 88.51d {+05h 54m 02s} +28.23d {+28d 14' 00"}
MOON_DIST: 124.16 [deg]
MOON_ILLUM: 98 [%]
GAL_COORDS: 53.60,-25.08 [deg] galactic lon,lat of the pointing direction
ECL_COORDS: 318.64, 21.47 [deg] ecliptic lon,lat of the pointing direction
COMMENTS: SWIFT has settled on a new target (pointing direction).
COMMENTS: The SLEW_TIME field represents the end of the slew plus ~30 sec for the ground s/w to detect the slew_settled state.
COMMENTS: Note that this is the actual pointing direction -- the result of PPST or a TOO.
COMMENTS: The spacecraft longitude,latitude at Notice_time is 232.61,20.43 [deg].
GCN template for BAT paragraph
Click here!
At :: UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB ***A*** (trigger=1420873). 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 ~1045 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: 73.152 s +/- 2.90513 s
Estimated T50 duration: 32.128 s +/- 0.729712 s
Estimated Peak Interval: MET 786670876.79999995 +/- 0.500000 s
Estimated background rate 1: 3597.177 near MET 786670809.920000 s
Estimated background rate 2: 3557.088 near MET 786670915.712000 s
Estimated total duration: 83.584 s (for data selection)
(from MET 786670819.840000 to MET 786670903.424000)
Estimated total fluence: 10630.700780 count
Created GTI with 4 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/trigger1420873/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:
Fri Dec 5 19:05:04 EST 2025