TDRSS lightcurve for Trigger=1186294
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 20 Aug 23 19:29:46 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1186294, Seg_Num: 0
GRB_RA: 132.886d {+08h 51m 33s} (J2000),
133.101d {+08h 52m 24s} (current),
132.430d {+08h 49m 43s} (1950)
GRB_DEC: -42.142d {-42d 08' 29"} (J2000),
-42.231d {-42d 13' 52"} (current),
-41.953d {-41d 57' 10"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=2057 [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: 20176 TJD; 232 DOY; 23/08/20
GRB_TIME: 70112.13 SOD {19:28:32.13} UT
GRB_PHI: -128.55 [deg]
GRB_THETA: 14.42 [deg]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 10.21 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 +0 +0 +1 -54 +0
SUN_POSTN: 149.72d {+09h 58m 53s} +12.33d {+12d 19' 44"}
SUN_DIST: 56.66 [deg] Sun_angle= 1.1 [hr] (West of Sun)
MOON_POSTN: 195.02d {+13h 00m 05s} -5.42d {-05d 25' 23"}
MOON_DIST: 65.76 [deg]
MOON_ILLUM: 17 [%]
GAL_COORDS: 262.98, 1.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 155.35,-56.27 [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 does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 282.15,6.69 [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: Sun 20 Aug 23 19:40:03 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1186294, Seg_Num: 0
GRB_RA: 132.886d {+08h 51m 33s} (J2000),
133.101d {+08h 52m 24s} (current),
132.430d {+08h 49m 43s} (1950)
GRB_DEC: -42.142d {-42d 08' 29"} (J2000),
-42.231d {-42d 13' 52"} (current),
-41.953d {-41d 57' 10"} (1950)
GRB_DATE: 20176 TJD; 232 DOY; 23/08/20
GRB_TIME: 70112.13 SOD {19:28:32.13} UT
TRIGGER_INDEX: 20000
GRB_PHI: -128.55 [deg]
GRB_THETA: 14.42 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 10.21 [sigma]
LC_URL: sw01186294000msb.lc
GCN template for BAT paragraph
Click here!
At 19:28:32 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230820 ***A*** (trigger=1186294). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 132.886, -42.142 which is
RA(J2000) = 08h 51m 33s
Dec(J2000) = -42d 08' 29"
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 ~1164 counts/sec (15-350 keV), at ~6 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: 4457.283 near MET 714252569.664000 s
Estimated background rate 2: 4321.361 near MET 714252674.624000 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 132.886 -42.142 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 132.886 -42.142
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 8 20 19 48.972627 54.297540
Obj: 2023 8 20 19 30.566718 -0.311207
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2023 8 20 19 339.409918 69.527079
Obj: 2023 8 20 19 7.195428 15.545259
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2023 8 20 19 327.042741 65.752491
Obj: 2023 8 20 19 2.593808 14.315626
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2023 8 20 19 270.293147 39.810873
Obj: 2023 8 20 19 332.993652 19.905848
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2023 8 20 19 268.040015 -21.069240
Obj: 2023 8 20 19 308.021701 19.941656
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2023 8 20 19 239.161141 -19.228889
Obj: 2023 8 20 19 301.322722 -34.177230
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2023 8 20 19 98.906885 9.516327
Obj: 2023 8 20 19 54.655659 -27.578737
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2023 8 20 19 138.676631 36.971113
Obj: 2023 8 20 19 59.079281 49.122631
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1186294/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 Aug 20 15:40:42 EDT 2023