TDRSS lightcurve for Trigger=1192491
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 03:58:07 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1192491, Seg_Num: 0
GRB_RA: 244.932d {+16h 19m 44s} (J2000),
245.267d {+16h 21m 04s} (current),
244.227d {+16h 16m 54s} (1950)
GRB_DEC: -14.527d {-14d 31' 36"} (J2000),
-14.583d {-14d 34' 56"} (current),
-14.407d {-14d 24' 26"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=4353 [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: 13983.97 SOD {03:53:03.97} UT
GRB_PHI: -92.74 [deg]
GRB_THETA: 16.41 [deg]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 13.93 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 +3 +0 +0 -33 +0
SUN_POSTN: 175.41d {+11h 41m 38s} +1.99d {+01d 59' 15"}
SUN_DIST: 71.08 [deg] Sun_angle= -4.7 [hr] (East of Sun)
MOON_POSTN: 207.44d {+13h 49m 46s} -11.71d {-11d 42' 49"}
MOON_DIST: 36.90 [deg]
MOON_ILLUM: 9 [%]
GAL_COORDS: 0.00, 24.53 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 245.60, 6.81 [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 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 = 170.60,-20.23 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 18 Sep 23 03:58:46 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1192490, Seg_Num: 0
GRB_RA: 261.905d {+17h 27m 37s} (J2000),
262.244d {+17h 28m 59s} (current),
261.190d {+17h 24m 46s} (1950)
GRB_DEC: -15.142d {-15d 08' 31"} (J2000),
-15.161d {-15d 09' 37"} (current),
-15.101d {-15d 06' 04"} (1950)
GRB_DATE: 20205 TJD; 261 DOY; 23/09/18
GRB_TIME: 13575.97 SOD {03:46:15.97} UT
TRIGGER_INDEX: 20000
GRB_PHI: -3.94 [deg]
GRB_THETA: 1.05 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 21.28 [sigma]
LC_URL: sw01192490000msb.lc
GCN template for BAT paragraph
Click here!
At 03:46:15 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230918 ***A*** (trigger=1192491). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 261.905, -15.142 which is
RA(J2000) = 17h 27m 37s
Dec(J2000) = -15d 08' 31"
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 ~0 counts/sec (15-350 keV), at ~ 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
T50 and T90 calculation
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 261.905 -15.142 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 261.905 -15.142
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 60.296456 10.664257
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 34.232004 35.895258
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 27.171085 37.041155
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 3 334.028560 51.435988
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 3 274.218487 23.060033
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 3 283.407965 -7.331266
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 90.761538 -34.340150
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 87.213204 26.282645
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1192491/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 23:59:42 EDT 2023