TDRSS lightcurve for Trigger=1291459
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Tue 25 Feb 25 19:42:47 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1291459, Seg_Num: 0
GRB_RA: 306.145d {+20h 24m 35s} (J2000),
306.567d {+20h 26m 16s} (current),
305.304d {+20h 21m 13s} (1950)
GRB_DEC: -41.484d {-41d 29' 03"} (J2000),
-41.401d {-41d 24' 04"} (current),
-41.647d {-41d 38' 48"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 416 [cnts] Image_Peak=60 [image_cnts]
TRIGGER_DUR: 0.064 [sec]
TRIGGER_INDEX: 10420 E_range: 25-100 keV
BKG_INTEN: 17586 [cnts]
BKG_TIME: 70740.85 SOD {19:39:00.85} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20731 TJD; 56 DOY; 25/02/25
GRB_TIME: 70753.65 SOD {19:39:13.65} UT
GRB_PHI: -51.54 [deg]
GRB_THETA: 33.40 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 25.76 [sigma]
IMAGE_SIGNIF: 8.46 [sigma]
MERIT_PARAMS: +1 +0 +0 -4 +2 -1 -105 +0 -72 +0
SUN_POSTN: 339.15d {+22h 36m 36s} -8.77d {-08d 46' 09"}
SUN_DIST: 43.49 [deg] Sun_angle= 2.2 [hr] (West of Sun)
MOON_POSTN: 311.63d {+20h 46m 31s} -22.07d {-22d 04' 20"}
MOON_DIST: 19.79 [deg]
MOON_ILLUM: 6 [%]
GAL_COORDS: 359.49,-34.45 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 298.36,-21.54 [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 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 = 177.15,18.46 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Tue 25 Feb 25 19:56:15 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1291459, Seg_Num: 0
GRB_RA: 306.145d {+20h 24m 35s} (J2000),
306.567d {+20h 26m 16s} (current),
305.304d {+20h 21m 13s} (1950)
GRB_DEC: -41.484d {-41d 29' 03"} (J2000),
-41.401d {-41d 24' 04"} (current),
-41.647d {-41d 38' 48"} (1950)
GRB_DATE: 20731 TJD; 56 DOY; 25/02/25
GRB_TIME: 70753.82 SOD {19:39:13.82} UT
TRIGGER_INDEX: 10420
GRB_PHI: -51.54 [deg]
GRB_THETA: 33.40 [deg]
DELTA_TIME: -15.00 [sec]
TRIGGER_DUR: 0.064 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 25.76 [sigma]
IMAGE_SIGNIF: 8.46 [sigma]
LC_URL: sw01291459000msb.lc
GCN template for BAT paragraph
Click here!
At 19:39:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 250225 ***A*** (trigger=1291459). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 306.145, -41.484 which is
RA(J2000) = 20h 24m 35s
Dec(J2000) = -41d 29' 03"
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 ~13148 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: 107.264 s +/- 2.89772 s
Estimated T50 duration: 64.512 s +/- 2.89772 s
Estimated Peak Interval: MET 762205249.79199994 +/- 0.500000 s
Estimated background rate 1: 4498.961 near MET 762205176.832000 s
Estimated background rate 2: 4306.832 near MET 762205346.048000 s
Estimated total duration: 128.512 s (for data selection)
(from MET 762205188.864000 to MET 762205317.376000)
Estimated total fluence: 66007.328408 count
Created GTI with 27 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 306.145 -41.484 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 306.145 -41.484
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 2 25 19 30.772826 37.085975
Obj: 2025 2 25 19 39.180649 -5.676874
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2025 2 25 19 345.571503 48.475436
Obj: 2025 2 25 19 17.534774 13.874911
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2025 2 25 19 337.787279 45.303625
Obj: 2025 2 25 19 13.014482 13.597476
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2025 2 25 19 292.971141 29.439726
Obj: 2025 2 25 19 342.146732 25.528671
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2025 2 25 19 288.045550 -11.863042
Obj: 2025 2 25 19 303.185940 29.079643
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2025 2 25 19 255.603946 -34.697177
Obj: 2025 2 25 19 304.692397 -24.477450
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2025 2 25 19 79.123570 1.476637
Obj: 2025 2 25 19 57.972891 -37.319158
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2025 2 25 19 120.986229 54.435688
Obj: 2025 2 25 19 59.199562 38.982452
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1291459/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:
Tue Feb 25 14:52:02 EST 2025