TDRSS lightcurve for Trigger=1187225
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 25 Aug 23 23:35:41 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1187225, Seg_Num: 0
GRB_RA: 261.947d {+17h 27m 47s} (J2000),
262.288d {+17h 29m 09s} (current),
261.227d {+17h 24m 54s} (1950)
GRB_DEC: -16.218d {-16d 13' 03"} (J2000),
-16.236d {-16d 14' 08"} (current),
-16.177d {-16d 10' 36"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=69418 [image_cnts]
TRIGGER_DUR: 216.000 [sec] (=3.6 [min])
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: 20181 TJD; 237 DOY; 23/08/25
GRB_TIME: 84712.10 SOD {23:31:52.10} UT
GRB_PHI: -142.61 [deg]
GRB_THETA: 30.72 [deg]
SOLN_STATUS: 0x1000001D
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 31.44 [sigma]
MERIT_PARAMS: +0 +0 +124 +8 +1 +11 -5 +1 +33 +0
SUN_POSTN: 154.48d {+10h 17m 55s} +10.58d {+10d 34' 41"}
SUN_DIST: 109.87 [deg] Sun_angle= -7.2 [hr] (East of Sun)
MOON_POSTN: 261.13d {+17h 24m 31s} -27.52d {-27d 31' 15"}
MOON_DIST: 11.34 [deg]
MOON_ILLUM: 67 [%]
GAL_COORDS: 8.64, 10.23 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 262.21, 7.00 [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 matches a source in the on-board catalog: Num=10213=(null) (probably an AT_Slot).
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is not a GRB.
COMMENTS: This is an interesting source.
COMMENTS: This trigger occurred at longitude,latitude = 310.22,10.87 [deg].
COMMENTS:
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 25 Aug 23 23:48:50 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1187225, Seg_Num: 0
GRB_RA: 261.947d {+17h 27m 47s} (J2000),
262.288d {+17h 29m 09s} (current),
261.227d {+17h 24m 54s} (1950)
GRB_DEC: -16.218d {-16d 13' 03"} (J2000),
-16.236d {-16d 14' 08"} (current),
-16.177d {-16d 10' 36"} (1950)
GRB_DATE: 20181 TJD; 237 DOY; 23/08/25
GRB_TIME: 84712.10 SOD {23:31:52.10} UT
TRIGGER_INDEX: 20000
GRB_PHI: -142.61 [deg]
GRB_THETA: 30.72 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 216.000 [sec] (=3.6 [min])
SOLN_STATUS: 0x1D
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 31.44 [sigma]
LC_URL: sw01187225000msb.lc
GCN template for BAT paragraph
Click here!
At 23:31:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230825 ***A*** (trigger=1187225). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 261.947, -16.218 which is
RA(J2000) = 17h 27m 47s
Dec(J2000) = -16d 13' 03"
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 ~1934 counts/sec (15-350 keV), at ~-3 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
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: 194.432 s +/- 14.6627 s
Estimated T50 duration: 194.432 s +/- 74.4668 s
Estimated Peak Interval: MET 714699286.91199994 +/- 0.500000 s
Estimated background rate 1: 6784.688 near MET 714699121.600000 s
Estimated background rate 2: 6254.069 near MET 714699323.776000 s
Estimated total duration: 194.432 s (for data selection)
(from MET 714699123.200000 to MET 714699317.632000)
Estimated total fluence: -80608.855865 count
Created GTI with 32 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 261.947 -16.218 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 261.947 -16.218
SWIFT J1727.8-1613 34166 261.937 -16.212 0.011313287446522036
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: 2023 8 25 23 96.484111 8.833949
Obj: 2023 8 25 23 336.537152 31.429342
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2023 8 25 23 78.944851 36.744075
Obj: 2023 8 25 23 304.029571 18.934812
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2023 8 25 23 73.437594 41.249231
Obj: 2023 8 25 23 300.433122 13.778261
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2023 8 25 23 42.861046 77.623711
Obj: 2023 8 25 23 282.517715 -13.970022
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2023 8 25 23 234.859000 28.528797
Obj: 2023 8 25 23 329.321637 -36.684959
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2023 8 25 23 276.204899 27.674890
Obj: 2023 8 25 23 205.203977 -70.267795
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2023 8 25 23 135.283608 -38.854384
Obj: 2023 8 25 23 44.390350 31.719758
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2023 8 25 23 97.689861 -7.928947
Obj: 2023 8 25 23 227.181684 70.432776
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1187225/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:
Fri Aug 25 19:49:23 EDT 2023