TDRSS lightcurve for Trigger=1186982
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 24 Aug 23 18:57:58 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1186982, Seg_Num: 0
GRB_RA: 261.937d {+17h 27m 45s} (J2000),
262.278d {+17h 29m 07s} (current),
261.217d {+17h 24m 52s} (1950)
GRB_DEC: -16.212d {-16d 12' 44"} (J2000),
-16.230d {-16d 13' 49"} (current),
-16.172d {-16d 10' 17"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=28431 [image_cnts]
TRIGGER_DUR: 192.000 [sec] (=3.2 [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: 20180 TJD; 236 DOY; 23/08/24
GRB_TIME: 68072.11 SOD {18:54:32.11} UT
GRB_PHI: -162.87 [deg]
GRB_THETA: 26.78 [deg]
SOLN_STATUS: 0x1000001D
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 24.37 [sigma]
MERIT_PARAMS: +0 +0 +100 +8 +1 +8 -5 +1 +35 +0
SUN_POSTN: 153.39d {+10h 13m 33s} +10.99d {+10d 59' 20"}
SUN_DIST: 111.01 [deg] Sun_angle= -7.3 [hr] (East of Sun)
MOON_POSTN: 243.39d {+16h 13m 33s} -24.62d {-24d 37' 14"}
MOON_DIST: 19.56 [deg]
MOON_ILLUM: 54 [%]
GAL_COORDS: 8.64, 10.25 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 262.20, 7.01 [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=26959=(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 = 2.25,17.62 [deg].
COMMENTS:
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 24 Aug 23 19:24:56 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1186982, Seg_Num: 0
GRB_RA: 261.937d {+17h 27m 45s} (J2000),
262.278d {+17h 29m 07s} (current),
261.217d {+17h 24m 52s} (1950)
GRB_DEC: -16.212d {-16d 12' 44"} (J2000),
-16.230d {-16d 13' 49"} (current),
-16.172d {-16d 10' 17"} (1950)
GRB_DATE: 20180 TJD; 236 DOY; 23/08/24
GRB_TIME: 68072.11 SOD {18:54:32.11} UT
TRIGGER_INDEX: 20000
GRB_PHI: -162.87 [deg]
GRB_THETA: 26.78 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 192.000 [sec] (=3.2 [min])
SOLN_STATUS: 0x1D
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 24.37 [sigma]
LC_URL: sw01186982000msb.lc
GCN template for BAT paragraph
Click here!
At 18:54:32 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230824 ***A*** (trigger=1186982). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 261.937, -16.212 which is
RA(J2000) = 17h 27m 45s
Dec(J2000) = -16d 12' 44"
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 ~1312 counts/sec (15-350 keV), at ~20 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 T90 duration: 177.92 s +/- 67.5918 s
Estimated T50 duration: 177.92 s +/- 85.8978 s
Estimated Peak Interval: MET 714596193.66399992 +/- 0.500000 s
Estimated background rate 1: 5558.426 near MET 714596091.904000 s
Estimated background rate 2: 5518.066 near MET 714596285.824000 s
Estimated total duration: 177.92 s (for data selection)
(from MET 714596103.808000 to MET 714596281.728000)
Estimated total fluence: -5822.923109 count
Created GTI with 15 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 261.937 -16.212 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 261.937 -16.212
SWIFT J1727.8-1613 34166 261.937 -16.212 1.1262047877356564e-05
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 24 19 47.961424 53.063400
Obj: 2023 8 24 19 287.671197 -4.061951
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2023 8 24 19 341.176755 68.311143
Obj: 2023 8 24 19 271.186081 -30.238125
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2023 8 24 19 329.029834 64.662528
Obj: 2023 8 24 19 266.841073 -35.252372
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2023 8 24 19 272.068361 39.676018
Obj: 2023 8 24 19 262.191984 -71.078145
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2023 8 24 19 269.164951 -20.191406
Obj: 2023 8 24 19 41.221104 -31.327635
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2023 8 24 19 240.385183 -19.970051
Obj: 2023 8 24 19 97.437947 -39.814913
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2023 8 24 19 97.815901 8.667999
Obj: 2023 8 24 19 330.922018 39.855374
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2023 8 24 19 137.420399 37.912647
Obj: 2023 8 24 19 277.555380 19.980479
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1186982/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:
Thu Aug 24 15:27:22 EDT 2023