TDRSS lightcurve for Trigger=1299967
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 31 Mar 25 04:43:33 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1299967, Seg_Num: 0
GRB_RA: 80.993d {+05h 23m 58s} (J2000),
81.407d {+05h 25m 38s} (current),
80.174d {+05h 20m 42s} (1950)
GRB_DEC: +33.029d {+33d 01' 43"} (J2000),
+33.050d {+33d 03' 00"} (current),
+32.983d {+32d 58' 59"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=1712 [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: 20765 TJD; 90 DOY; 25/03/31
GRB_TIME: 16660.65 SOD {04:37:40.65} UT
GRB_PHI: 159.60 [deg]
GRB_THETA: 13.13 [deg]
SOLN_STATUS: 0x13
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 7.76 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 -2 +0 +1 -30 +0
SUN_POSTN: 9.86d {+00h 39m 27s} +4.25d {+04d 14' 45"}
SUN_DIST: 72.24 [deg] Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN: 32.00d {+02h 08m 01s} +16.30d {+16d 17' 56"}
MOON_DIST: 47.42 [deg]
MOON_ILLUM: 5 [%]
GAL_COORDS: 174.05, -1.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 82.35, 9.83 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This Notice was delayed by more than 60 sec past the end of the trigger integration interval;
COMMENTS: probably due to it occurring during a Malindi downlink session.
COMMENTS: This is an image trigger. (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)
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 = 138.01,15.37 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 31 Mar 25 05:00:46 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1299967, Seg_Num: 0
GRB_RA: 80.993d {+05h 23m 58s} (J2000),
81.407d {+05h 25m 38s} (current),
80.174d {+05h 20m 42s} (1950)
GRB_DEC: +33.029d {+33d 01' 43"} (J2000),
+33.050d {+33d 03' 00"} (current),
+32.983d {+32d 58' 59"} (1950)
GRB_DATE: 20765 TJD; 90 DOY; 25/03/31
GRB_TIME: 16660.65 SOD {04:37:40.65} UT
TRIGGER_INDEX: 20000
GRB_PHI: 159.60 [deg]
GRB_THETA: 13.13 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x13
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 7.76 [sigma]
LC_URL: sw01299967000msb.lc
GCN template for BAT paragraph
Click here!
At 04:37:40 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 250331 ***A*** (trigger=1299967). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 80.993, +33.029 which is
RA(J2000) = 05h 23m 58s
Dec(J2000) = +33d 01' 43"
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 ~835 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: 37.824 s +/- 1.6 s
Estimated T50 duration: 19.712 s +/- 0.512 s
Estimated Peak Interval: MET 765088694.27200007 +/- 0.500000 s
Estimated background rate 1: 3954.375 near MET 765088677.600000 s
Estimated background rate 2: 4001.675 near MET 765088804.608000 s
Estimated total duration: 44.096 s (for data selection)
(from MET 765088683.200000 to MET 765088727.296000)
Estimated total fluence: 6376.412879 count
Created GTI with 3 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 80.993 33.029 0.083
No match
Search for this GRB position to the source locations in BAT transient monitor (search radius within 12 arcmin)
python compare_catalog.py 80.993 33.029
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
GSFC, Greenbelt, Maryland
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 154.226443 -43.555684
Obj: 2025 3 31 4 116.824327 20.038081
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 115.811775 -28.627289
Obj: 2025 3 31 4 107.409715 43.231076
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 112.330993 -23.343536
Obj: 2025 3 31 4 103.942759 48.540527
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 91.633157 7.988195
Obj: 2025 3 31 4 144.682472 73.306936
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 138.586511 45.816164
Obj: 2025 3 31 4 216.801289 13.357831
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 20.968211 58.162974
Obj: 2025 3 31 4 253.391119 40.285948
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 236.507625 -38.972318
Obj: 2025 3 31 4 152.344654 -21.599170
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2025 3 31 4 26.818841 -61.366091
Obj: 2025 3 31 4 117.127999 -20.512754
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1299967/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:
Mon Mar 31 00:36:43 EDT 2025