TDRSS lightcurve for Trigger=1294765
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 12 Mar 25 13:24:49 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1294765, Seg_Num: 0
GRB_RA: 29.510d {+01h 58m 02s} (J2000),
29.769d {+01h 59m 05s} (current),
28.994d {+01h 55m 59s} (1950)
GRB_DEC: -42.404d {-42d 24' 15"} (J2000),
-42.282d {-42d 16' 56"} (current),
-42.647d {-42d 38' 49"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 8729 [cnts] Image_Peak=254 [image_cnts]
TRIGGER_DUR: 2.048 [sec]
TRIGGER_INDEX: 271 E_range: 50-350 keV
BKG_INTEN: 96843 [cnts]
BKG_TIME: 48220.76 SOD {13:23:40.76} UT
BKG_DUR: 24 [sec]
GRB_DATE: 20746 TJD; 71 DOY; 25/03/12
GRB_TIME: 48257.63 SOD {13:24:17.63} UT
GRB_PHI: -14.50 [deg]
GRB_THETA: 37.94 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 14.49 [sigma]
IMAGE_SIGNIF: 7.99 [sigma]
MERIT_PARAMS: +1 +0 +0 +1 +3 -2 +0 +0 -62 +0
SUN_POSTN: 352.86d {+23h 31m 26s} -3.08d {-03d 05' 04"}
SUN_DIST: 51.18 [deg] Sun_angle= -2.5 [hr] (East of Sun)
MOON_POSTN: 155.44d {+10h 21m 45s} +12.51d {+12d 30' 54"}
MOON_DIST: 124.54 [deg]
MOON_ILLUM: 97 [%]
GAL_COORDS: 265.62,-69.57 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 5.82,-49.76 [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 = 341.72,-15.54 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 12 Mar 25 13:41:11 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1294765, Seg_Num: 0
GRB_RA: 29.510d {+01h 58m 02s} (J2000),
29.769d {+01h 59m 05s} (current),
28.994d {+01h 55m 59s} (1950)
GRB_DEC: -42.404d {-42d 24' 15"} (J2000),
-42.282d {-42d 16' 56"} (current),
-42.647d {-42d 38' 49"} (1950)
GRB_DATE: 20746 TJD; 71 DOY; 25/03/12
GRB_TIME: 48257.63 SOD {13:24:17.63} UT
TRIGGER_INDEX: 271
GRB_PHI: -14.50 [deg]
GRB_THETA: 37.94 [deg]
DELTA_TIME: -5.00 [sec]
TRIGGER_DUR: 2.048 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 14.49 [sigma]
IMAGE_SIGNIF: 7.99 [sigma]
LC_URL: sw01294765000msb.lc
GCN template for BAT paragraph
Click here!
At 13:24:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 250312 ***A*** (trigger=1294765). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 29.510, -42.404 which is
RA(J2000) = 01h 58m 02s
Dec(J2000) = -42d 24' 15"
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 ~1789 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
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: 21.952 s +/- 10.143 s
Estimated T50 duration: 21.952 s +/- 13.2624 s
Estimated Peak Interval: MET 763478693.82399988 +/- 0.500000 s
Estimated background rate 1: 8334.375 near MET 763478671.200000 s
Estimated background rate 2: 7834.794 near MET 763478698.176000 s
Estimated total duration: 21.952 s (for data selection)
(from MET 763478673.600000 to MET 763478695.552000)
Estimated total fluence: -3071.253918 count
Created GTI with 5 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 29.510 -42.404 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 29.510 -42.404
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 12 13 288.910191 17.214120
Obj: 2025 3 12 13 300.590591 -32.727011
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2025 3 12 13 268.007114 -9.140953
Obj: 2025 3 12 13 299.670211 -53.544599
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2025 3 12 13 264.379217 -14.063928
Obj: 2025 3 12 13 297.897335 -58.765532
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2025 3 12 13 249.623722 -50.572843
Obj: 2025 3 12 13 0.582820 -67.565859
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2025 3 12 13 30.999706 -51.247083
Obj: 2025 3 12 13 37.711355 -0.397070
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2025 3 12 13 125.619693 -44.573801
Obj: 2025 3 12 13 58.708514 -34.423155
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2025 3 12 13 349.130354 57.655105
Obj: 2025 3 12 13 329.478023 8.759981
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2025 3 12 13 255.946557 28.160457
Obj: 2025 3 12 13 310.042613 15.931809
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1294765/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:
Wed Mar 12 09:28:23 EDT 2025