TDRSS lightcurve for Trigger=1220736
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 08 Apr 24 15:14:34 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1220736, Seg_Num: 0
GRB_RA: 236.947d {+15h 47m 47s} (J2000),
237.477d {+15h 49m 54s} (current),
235.862d {+15h 43m 27s} (1950)
GRB_DEC: -62.534d {-62d 32' 01"} (J2000),
-62.607d {-62d 36' 25"} (current),
-62.380d {-62d 22' 47"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 4469 [cnts] Image_Peak=173 [image_cnts]
TRIGGER_DUR: 4.096 [sec]
TRIGGER_INDEX: 280 E_range: 15-25 keV
BKG_INTEN: 35828 [cnts]
BKG_TIME: 54774.76 SOD {15:12:54.76} UT
BKG_DUR: 40 [sec]
GRB_DATE: 20408 TJD; 99 DOY; 24/04/08
GRB_TIME: 54834.60 SOD {15:13:54.60} UT
GRB_PHI: -145.24 [deg]
GRB_THETA: 31.13 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 9.59 [sigma]
IMAGE_SIGNIF: 7.07 [sigma]
MERIT_PARAMS: +1 +0 +0 +2 +0 -3 +0 +1 +47 +0
SUN_POSTN: 17.79d {+01h 11m 11s} +7.55d {+07d 32' 44"}
SUN_DIST: 117.88 [deg] Sun_angle= 9.4 [hr] (West of Sun)
MOON_POSTN: 16.18d {+01h 04m 43s} +7.14d {+07d 08' 15"}
MOON_DIST: 116.96 [deg]
MOON_ILLUM: 0 [%]
GAL_COORDS: 321.77, -6.30 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 250.43,-41.32 [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 = 177.74,-19.79 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 08 Apr 24 15:30:46 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1220736, Seg_Num: 0
GRB_RA: 236.947d {+15h 47m 47s} (J2000),
237.477d {+15h 49m 54s} (current),
235.862d {+15h 43m 27s} (1950)
GRB_DEC: -62.534d {-62d 32' 01"} (J2000),
-62.607d {-62d 36' 25"} (current),
-62.380d {-62d 22' 47"} (1950)
GRB_DATE: 20408 TJD; 99 DOY; 24/04/08
GRB_TIME: 54834.60 SOD {15:13:54.60} UT
TRIGGER_INDEX: 280
GRB_PHI: -145.24 [deg]
GRB_THETA: 31.13 [deg]
DELTA_TIME: -63.00 [sec]
TRIGGER_DUR: 4.096 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 9.59 [sigma]
IMAGE_SIGNIF: 7.07 [sigma]
LC_URL: sw01220736000msb.lc
GCN template for BAT paragraph
Click here!
At 15:13:54 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240408 ***A*** (trigger=1220736). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 236.947, -62.534 which is
RA(J2000) = 15h 47m 47s
Dec(J2000) = -62d 32' 01"
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 ~707 counts/sec (15-350 keV), at ~4 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: 116.352 s +/- 79.4032 s
Estimated T50 duration: 116.352 s +/- 82.8162 s
Estimated Peak Interval: MET 734282071.03999996 +/- 0.500000 s
Estimated background rate 1: 3031.704 near MET 734282053.120000 s
Estimated background rate 2: 3346.042 near MET 734282216.256000 s
Estimated total duration: 116.352 s (for data selection)
(from MET 734282063.040000 to MET 734282179.392000)
Estimated total fluence: -1284.024961 count
Created GTI with 6 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 236.947 -62.534 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 236.947 -62.534
4U 1543-62 20142 236.976 -62.5698 0.038212331573616115
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 8 15 308.182407 46.878696
Obj: 2024 4 8 15 36.047898 -41.814118
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2024 4 8 15 275.848754 23.624755
Obj: 2024 4 8 15 28.160539 -20.841985
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2024 4 8 15 273.117869 18.463848
Obj: 2024 4 8 15 26.890844 -19.986580
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2024 4 8 15 255.064732 -17.220483
Obj: 2024 4 8 15 12.897206 4.410106
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2024 4 8 15 329.904808 -63.292768
Obj: 2024 4 8 15 339.332686 54.352355
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2024 4 8 15 174.864663 -47.945145
Obj: 2024 4 8 15 341.157452 -13.023381
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2024 4 8 15 54.452163 57.440199
Obj: 2024 4 8 15 10.790494 -55.038310
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2024 4 8 15 218.700160 44.133487
Obj: 2024 4 8 15 26.185271 16.863830
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1220736/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:
Mon Apr 8 11:31:03 EDT 2024