TDRSS lightcurve for Trigger=1215912
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 18 Feb 24 02:00:14 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1215912, Seg_Num: 0
GRB_RA: 161.781d {+10h 47m 07s} (J2000),
162.091d {+10h 48m 22s} (current),
161.138d {+10h 44m 33s} (1950)
GRB_DEC: +1.304d {+01d 18' 14"} (J2000),
+1.176d {+01d 10' 35"} (current),
+1.568d {+01d 34' 05"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 2469 [cnts] Image_Peak=100 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 147 E_range: 25-100 keV
BKG_INTEN: 15841 [cnts]
BKG_TIME: 7183.06 SOD {01:59:43.06} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20358 TJD; 49 DOY; 24/02/18
GRB_TIME: 7200.66 SOD {02:00:00.66} UT
GRB_PHI: 131.03 [deg]
GRB_THETA: 35.07 [deg]
SOLN_STATUS: 0x83
RATE_SIGNIF: 11.35 [sigma]
IMAGE_SIGNIF: 6.54 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 -4 +0 +0 +96 +0
SUN_POSTN: 331.04d {+22h 04m 09s} -11.85d {-11d 51' 15"}
SUN_DIST: 164.69 [deg] Sun_angle= 11.3 [hr] (West of Sun)
MOON_POSTN: 74.82d {+04h 59m 16s} +27.16d {+27d 09' 39"}
MOON_DIST: 87.04 [deg]
MOON_ILLUM: 65 [%]
GAL_COORDS: 248.58, 50.57 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 162.70, -5.94 [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: Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.
COMMENTS: This trigger occurred at longitude,latitude = 299.21,7.97 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 18 Feb 24 02:17:08 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1215912, Seg_Num: 0
GRB_RA: 161.781d {+10h 47m 07s} (J2000),
162.091d {+10h 48m 22s} (current),
161.138d {+10h 44m 33s} (1950)
GRB_DEC: +1.304d {+01d 18' 14"} (J2000),
+1.176d {+01d 10' 35"} (current),
+1.568d {+01d 34' 05"} (1950)
GRB_DATE: 20358 TJD; 49 DOY; 24/02/18
GRB_TIME: 7200.66 SOD {02:00:00.66} UT
TRIGGER_INDEX: 147
GRB_PHI: 131.03 [deg]
GRB_THETA: 35.07 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x83
RATE_SIGNIF: 11.35 [sigma]
IMAGE_SIGNIF: 6.54 [sigma]
LC_URL: sw01215912000msb.lc
GCN template for BAT paragraph
Click here!
At 02:00:00 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240218 ***A*** (trigger=1215912). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 161.781, +1.304 which is
RA(J2000) = 10h 47m 07s
Dec(J2000) = +01d 18' 14"
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 ~1646 counts/sec (15-350 keV), at ~22 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: 50.56 s +/- 2.90513 s
Estimated T50 duration: 20.352 s +/- 0.729712 s
Estimated Peak Interval: MET 729914456.19199991 +/- 0.500000 s
Estimated background rate 1: 3719.922 near MET 729914416.000000 s
Estimated background rate 2: 3617.326 near MET 729914558.080000 s
Estimated total duration: 74.24 s (for data selection)
(from MET 729914422.400000 to MET 729914496.640000)
Estimated total fluence: 25432.819663 count
Created GTI with 9 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 161.781 1.304 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 161.781 1.304
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: 2024 2 18 2 106.784253 -37.562175
Obj: 2024 2 18 2 287.622811 22.213814
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2024 2 18 2 82.465835 -10.540832
Obj: 2024 2 18 2 265.879000 -4.452008
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2024 2 18 2 79.594915 -5.817056
Obj: 2024 2 18 2 262.399307 -9.300595
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2024 2 18 2 61.849217 30.988611
Obj: 2024 2 18 2 246.151071 -45.979280
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2024 2 18 2 194.252160 70.033221
Obj: 2024 2 18 2 29.735514 -56.333394
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2024 2 18 2 332.279934 39.390604
Obj: 2024 2 18 2 132.468790 -43.139409
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2024 2 18 2 205.817415 -71.493216
Obj: 2024 2 18 2 353.709414 62.265758
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2024 2 18 2 52.696673 -29.619113
Obj: 2024 2 18 2 250.111563 28.124412
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1215912/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:
Sat Feb 17 21:17:42 EST 2024