TDRSS lightcurve for Trigger=1192486
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 18 Sep 23 03:02:02 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1192486, Seg_Num: 0
GRB_RA: 299.656d {+19h 58m 37s} (J2000),
299.878d {+19h 59m 31s} (current),
299.188d {+19h 56m 45s} (1950)
GRB_DEC: +35.539d {+35d 32' 22"} (J2000),
+35.605d {+35d 36' 18"} (current),
+35.403d {+35d 24' 09"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=3284 [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: 20205 TJD; 261 DOY; 23/09/18
GRB_TIME: 10783.97 SOD {02:59:43.97} UT
GRB_PHI: 0.00 [deg]
GRB_THETA: 0.09 [deg]
SOLN_STATUS: 0x1000041D
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 15.41 [sigma]
MERIT_PARAMS: +0 +0 +100 +6 +1 +4 +0 +1 +43 +0
SUN_POSTN: 175.37d {+11h 41m 29s} +2.00d {+02d 00' 10"}
SUN_DIST: 116.10 [deg] Sun_angle= -8.3 [hr] (East of Sun)
MOON_POSTN: 207.00d {+13h 48m 00s} -11.50d {-11d 30' 07"}
MOON_DIST: 98.98 [deg]
MOON_ILLUM: 9 [%]
GAL_COORDS: 71.65, 3.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 313.96, 54.55 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This Notice was delayed by more than 60 sec past the end of the trigger integration interval;
COMMENTS: probably due to it occurring during a Malindi downlink session.
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=22485=(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.
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 18 Sep 23 03:09:55 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1192486, Seg_Num: 0
GRB_RA: 299.656d {+19h 58m 37s} (J2000),
299.878d {+19h 59m 31s} (current),
299.188d {+19h 56m 45s} (1950)
GRB_DEC: +35.539d {+35d 32' 22"} (J2000),
+35.605d {+35d 36' 18"} (current),
+35.403d {+35d 24' 09"} (1950)
GRB_DATE: 20205 TJD; 261 DOY; 23/09/18
GRB_TIME: 10783.97 SOD {02:59:43.97} UT
TRIGGER_INDEX: 20000
GRB_PHI: 0.00 [deg]
GRB_THETA: 0.09 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x41D
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 15.41 [sigma]
LC_URL: sw01192486000msb.lc
GCN template for BAT paragraph
Click here!
At 02:59:43 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230918 ***A*** (trigger=1192486). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 299.656, +35.539 which is
RA(J2000) = 19h 58m 37s
Dec(J2000) = +35d 32' 22"
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 ~1007 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
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: 3765.059 near MET 716698817.600000 s
Estimated background rate 2: 3694.393 near MET 716698922.560000 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 299.656 35.539 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 299.656 35.539
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: 2023 9 18 3 137.763723 -40.113867
Obj: 2023 9 18 3 87.776468 70.245399
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2023 9 18 3 105.540505 -20.000118
Obj: 2023 9 18 3 241.003041 81.195311
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2023 9 18 3 102.444964 -14.703437
Obj: 2023 9 18 3 255.644822 77.068536
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2023 9 18 3 85.105420 19.021303
Obj: 2023 9 18 3 239.631330 40.250509
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2023 9 18 3 154.066679 53.772845
Obj: 2023 9 18 3 245.055628 -32.342318
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2023 9 18 3 356.949109 57.542606
Obj: 2023 9 18 3 221.153922 -3.859389
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2023 9 18 3 225.909495 -49.189052
Obj: 2023 9 18 3 119.994558 21.090173
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2023 9 18 3 44.757466 -53.049659
Obj: 2023 9 18 3 154.324714 18.086406
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1192486/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 Sep 17 23:10:42 EDT 2023