TDRSS lightcurve for Trigger=1192480
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 02:17:09 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1192480, Seg_Num: 0
GRB_RA: 244.766d {+16h 19m 04s} (J2000),
245.104d {+16h 20m 25s} (current),
244.056d {+16h 16m 13s} (1950)
GRB_DEC: -15.611d {-15d 36' 37"} (J2000),
-15.667d {-15d 39' 58"} (current),
-15.490d {-15d 29' 24"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=1719 [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: 8151.97 SOD {02:15:51.97} UT
GRB_PHI: -122.67 [deg]
GRB_THETA: 36.27 [deg]
SOLN_STATUS: 0x513
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 8.38 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 -1 +0 +0 -32 +0
SUN_POSTN: 175.34d {+11h 41m 23s} +2.01d {+02d 00' 53"}
SUN_DIST: 71.13 [deg] Sun_angle= -4.7 [hr] (East of Sun)
MOON_POSTN: 206.65d {+13h 46m 36s} -11.33d {-11d 19' 56"}
MOON_DIST: 37.59 [deg]
MOON_ILLUM: 9 [%]
GAL_COORDS: 358.98, 23.96 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 245.63, 5.72 [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 matches a source in the ground catalog: Sco_X-1, delta=0.208 [deg].
COMMENTS: This is not a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 186.38,-19.52 [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: Mon 18 Sep 23 02:20:02 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1192480, Seg_Num: 0
GRB_RA: 244.766d {+16h 19m 04s} (J2000),
245.104d {+16h 20m 25s} (current),
244.056d {+16h 16m 13s} (1950)
GRB_DEC: -15.611d {-15d 36' 37"} (J2000),
-15.667d {-15d 39' 58"} (current),
-15.490d {-15d 29' 24"} (1950)
GRB_DATE: 20205 TJD; 261 DOY; 23/09/18
GRB_TIME: 8151.97 SOD {02:15:51.97} UT
TRIGGER_INDEX: 20000
GRB_PHI: -122.67 [deg]
GRB_THETA: 36.27 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x513
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 8.38 [sigma]
LC_URL: sw01192480000msb.lc
GCN template for BAT paragraph
Click here!
At 02:15:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230918 ***A*** (trigger=1192480). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 244.766, -15.611 which is
RA(J2000) = 16h 19m 04s
Dec(J2000) = -15d 36' 37"
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 ~867 counts/sec (15-350 keV), at ~7 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
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: 49.152 s +/- 4.096 s
Estimated T50 duration: 28.672 s +/- 4.096 s
Estimated Peak Interval: MET 716696318.71999991 +/- 0.500000 s
Estimated background rate 1: 4810.753 near MET 716696215.808000 s
Estimated background rate 2: 4806.752 near MET 716696347.392000 s
Estimated total duration: 53.248 s (for data selection)
(from MET 716696271.616000 to MET 716696324.864000)
Estimated total fluence: 8467.497512 count
Created GTI with 3 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 244.766 -15.611 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 244.766 -15.611
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 2 122.878437 -31.201935
Obj: 2023 9 18 2 61.393514 8.879091
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2023 9 18 2 97.029360 -7.480481
Obj: 2023 9 18 2 36.050535 34.429668
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2023 9 18 2 93.910311 -2.300077
Obj: 2023 9 18 2 29.208767 35.749633
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2023 9 18 2 79.050037 33.007129
Obj: 2023 9 18 2 337.343452 51.785514
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2023 9 18 2 180.043540 56.676238
Obj: 2023 9 18 2 273.674185 25.087341
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2023 9 18 2 330.794807 54.067498
Obj: 2023 9 18 2 284.968664 -5.934540
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2023 9 18 2 204.285265 -56.811160
Obj: 2023 9 18 2 91.229528 -36.390960
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2023 9 18 2 61.051988 -42.699507
Obj: 2023 9 18 2 85.704200 24.700894
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1192480/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 22:23:02 EDT 2023