TDRSS lightcurve for Trigger=1216751
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 21 Feb 24 23:06:49 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1216751, Seg_Num: 0
GRB_RA: 84.652d {+05h 38m 36s} (J2000),
85.016d {+05h 40m 04s} (current),
83.898d {+05h 35m 36s} (1950)
GRB_DEC: +22.174d {+22d 10' 26"} (J2000),
+22.186d {+22d 11' 10"} (current),
+22.146d {+22d 08' 46"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=3700 [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: 20361 TJD; 52 DOY; 24/02/21
GRB_TIME: 83119.04 SOD {23:05:19.04} UT
GRB_PHI: 40.10 [deg]
GRB_THETA: 23.26 [deg]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 16.98 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 +5 +0 +1 +37 +0
SUN_POSTN: 334.77d {+22h 19m 04s} -10.47d {-10d 28' 09"}
SUN_DIST: 112.57 [deg] Sun_angle= -7.3 [hr] (East of Sun)
MOON_POSTN: 128.24d {+08h 32m 59s} +23.83d {+23d 49' 60"}
MOON_DIST: 39.67 [deg]
MOON_ILLUM: 94 [%]
GAL_COORDS: 184.93, -4.90 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 85.05, -1.17 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
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 = 291.68,13.81 [deg].
COMMENTS:
COMMENTS: This trigger occured while the StarTracker had lost lock, so it is possibly bogus.
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 21 Feb 24 23:19:56 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1216751, Seg_Num: 0
GRB_RA: 84.652d {+05h 38m 36s} (J2000),
85.016d {+05h 40m 04s} (current),
83.898d {+05h 35m 36s} (1950)
GRB_DEC: +22.174d {+22d 10' 26"} (J2000),
+22.186d {+22d 11' 10"} (current),
+22.146d {+22d 08' 46"} (1950)
GRB_DATE: 20361 TJD; 52 DOY; 24/02/21
GRB_TIME: 83119.04 SOD {23:05:19.04} UT
TRIGGER_INDEX: 20000
GRB_PHI: 40.10 [deg]
GRB_THETA: 23.26 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 16.98 [sigma]
LC_URL: sw01216751000msb.lc
GCN template for BAT paragraph
Click here!
At 23:05:19 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240221 ***A*** (trigger=1216751). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 84.652, +22.174 which is
RA(J2000) = 05h 38m 36s
Dec(J2000) = +22d 10' 26"
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 ~1320 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
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 background rate 1: 4400.765 near MET 730249546.688000 s
Estimated background rate 2: 4289.219 near MET 730249651.648000 s
Estimated total fluence: 0.000000 count
Created GTI with 2 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 84.652 22.174 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 84.652 22.174
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 21 23 78.244691 -2.181808
Obj: 2024 2 21 23 299.536111 62.143235
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2024 2 21 23 57.298893 26.066102
Obj: 2024 2 21 23 264.422006 36.269126
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2024 2 21 23 51.832940 29.214165
Obj: 2024 2 21 23 262.695325 31.440284
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2024 2 21 23 10.867228 59.168976
Obj: 2024 2 21 23 244.131815 -5.291043
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2024 2 21 23 256.957484 39.500317
Obj: 2024 2 21 23 292.296399 -70.073331
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2024 2 21 23 292.424481 12.761615
Obj: 2024 2 21 23 183.664121 -33.354025
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2024 2 21 23 110.445525 -51.093594
Obj: 2024 2 21 23 85.166224 59.600727
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2024 2 21 23 80.876589 5.129530
Obj: 2024 2 21 23 202.611403 34.001113
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1216751/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 Feb 21 18:20:42 EST 2024