TDRSS lightcurve for Trigger=1223470
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 21 Apr 24 09:43:12 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1223470, Seg_Num: 0
GRB_RA: 299.686d {+19h 58m 45s} (J2000),
300.028d {+20h 00m 07s} (current),
298.980d {+19h 55m 55s} (1950)
GRB_DEC: -14.879d {-14d 52' 42"} (J2000),
-14.811d {-14d 48' 39"} (current),
-15.015d {-15d 00' 53"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 6195 [cnts] Image_Peak=233 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 157 E_range: 50-350 keV
BKG_INTEN: 15856 [cnts]
BKG_TIME: 34958.69 SOD {09:42:38.69} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20421 TJD; 112 DOY; 24/04/21
GRB_TIME: 34974.05 SOD {09:42:54.05} UT
GRB_PHI: -135.32 [deg]
GRB_THETA: 50.52 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 79.49 [sigma]
IMAGE_SIGNIF: 11.05 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +3 +1 +0 +0 +4 +0
SUN_POSTN: 29.62d {+01h 58m 28s} +12.09d {+12d 05' 30"}
SUN_DIST: 92.68 [deg] Sun_angle= 6.0 [hr] (West of Sun)
MOON_POSTN: 183.45d {+12h 13m 47s} -0.18d {-00d 10' 58"}
MOON_DIST: 115.58 [deg]
MOON_ILLUM: 94 [%]
GAL_COORDS: 26.70,-21.47 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 298.75, 5.65 [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 = 227.69,-1.26 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 21 Apr 24 10:04:25 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1223470, Seg_Num: 0
GRB_RA: 299.686d {+19h 58m 45s} (J2000),
300.028d {+20h 00m 07s} (current),
298.980d {+19h 55m 55s} (1950)
GRB_DEC: -14.879d {-14d 52' 42"} (J2000),
-14.811d {-14d 48' 39"} (current),
-15.015d {-15d 00' 53"} (1950)
GRB_DATE: 20421 TJD; 112 DOY; 24/04/21
GRB_TIME: 34974.05 SOD {09:42:54.05} UT
TRIGGER_INDEX: 157
GRB_PHI: -135.32 [deg]
GRB_THETA: 50.52 [deg]
DELTA_TIME: 64.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 79.49 [sigma]
IMAGE_SIGNIF: 11.05 [sigma]
LC_URL: sw01223470000msb.lc
GCN template for BAT paragraph
Click here!
At 09:42:54 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240421 ***A*** (trigger=1223470). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 299.686, -14.879 which is
RA(J2000) = 19h 58m 45s
Dec(J2000) = -14d 52' 42"
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 ~9461 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: 56.256 s +/- 3.10944 s
Estimated T50 duration: 4.928 s +/- 0.384 s
Estimated Peak Interval: MET 735385407.87199998 +/- 0.500000 s
Estimated background rate 1: 4984.141 near MET 735385390.400000 s
Estimated background rate 2: 4546.928 near MET 735385546.816000 s
Estimated total duration: 102.912 s (for data selection)
(from MET 735385396.800000 to MET 735385499.712000)
Estimated total fluence: 23346.830396 count
Created GTI with 19 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 299.686 -14.879 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 299.686 -14.879
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 4 21 10 249.837968 -5.239284
Obj: 2024 4 21 10 339.606533 33.740983
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2024 4 21 10 226.779096 -32.498225
Obj: 2024 4 21 10 305.243828 22.211259
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2024 4 21 10 220.366046 -34.770538
Obj: 2024 4 21 10 301.528784 17.081369
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2024 4 21 10 169.706129 -57.604819
Obj: 2024 4 21 10 282.098026 -10.527616
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2024 4 21 10 85.570642 -30.885548
Obj: 2024 4 21 10 325.020115 -36.414112
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2024 4 21 10 106.920883 -3.092759
Obj: 2024 4 21 10 211.633475 -67.677574
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2024 4 21 10 280.187773 42.350973
Obj: 2024 4 21 10 48.270925 30.711259
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2024 4 21 10 264.903488 -15.635689
Obj: 2024 4 21 10 216.866830 71.190725
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1223470/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:
Sun Apr 21 06:04:42 EDT 2024