TDRSS lightcurve for Trigger=992099
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 19 Aug 20 15:44:59 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 992099, Seg_Num: 0
GRB_RA: 21.428d {+01h 25m 43s} (J2000),
21.776d {+01h 27m 06s} (current),
20.592d {+01h 22m 22s} (1950)
GRB_DEC: +63.048d {+63d 02' 52"} (J2000),
+63.155d {+63d 09' 17"} (current),
+62.788d {+62d 47' 17"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 6478 [cnts] Image_Peak=250 [image_cnts]
TRIGGER_DUR: 2.048 [sec]
TRIGGER_INDEX: 262 E_range: 25-100 keV
BKG_INTEN: 63977 [cnts]
BKG_TIME: 56598.51 SOD {15:43:18.51} UT
BKG_DUR: 24 [sec]
GRB_DATE: 19080 TJD; 232 DOY; 20/08/19
GRB_TIME: 56632.88 SOD {15:43:52.88} UT
GRB_PHI: -167.72 [deg]
GRB_THETA: 22.30 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 11.09 [sigma]
IMAGE_SIGNIF: 7.88 [sigma]
MERIT_PARAMS: +1 +0 +0 +1 +2 -2 +0 +1 +8 +0
SUN_POSTN: 149.32d {+09h 57m 17s} +12.47d {+12d 28' 16"}
SUN_DIST: 94.36 [deg] Sun_angle= 8.5 [hr] (West of Sun)
MOON_POSTN: 158.04d {+10h 32m 10s} +14.17d {+14d 10' 18"}
MOON_DIST: 95.62 [deg]
MOON_ILLUM: 0 [%]
GAL_COORDS: 126.80, 0.43 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 50.21, 48.76 [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 a rate trigger.
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 = 175.88,19.76 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 19 Aug 20 16:00:47 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 992099, Seg_Num: 0
GRB_RA: 21.428d {+01h 25m 43s} (J2000),
21.776d {+01h 27m 06s} (current),
20.592d {+01h 22m 22s} (1950)
GRB_DEC: +63.048d {+63d 02' 52"} (J2000),
+63.155d {+63d 09' 17"} (current),
+62.788d {+62d 47' 17"} (1950)
GRB_DATE: 19080 TJD; 232 DOY; 20/08/19
GRB_TIME: 56632.88 SOD {15:43:52.88} UT
TRIGGER_INDEX: 262
GRB_PHI: -167.72 [deg]
GRB_THETA: 22.30 [deg]
DELTA_TIME: -76.00 [sec]
TRIGGER_DUR: 2.048 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 11.09 [sigma]
IMAGE_SIGNIF: 7.88 [sigma]
LC_URL: sw00992099000msb.lc
GCN template for BAT paragraph
Click here!
At 15:43:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200819 ***A*** (trigger=992099). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 21.428, +63.048 which is
RA(J2000) = 01h 25m 43s
Dec(J2000) = +63d 02' 52"
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 ~1671 counts/sec (15-350 keV), at ~0 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
Extended TDRSS lc No.4
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: 53.632 s +/- 24.5763 s
Estimated T50 duration: 15.36 s +/- 1.55719 s
Estimated Peak Interval: MET 619544659.26399994 +/- 0.500000 s
Estimated background rate 1: 5245.871 near MET 619544645.952000 s
Estimated background rate 2: 5156.982 near MET 619544802.560000 s
Estimated total duration: 103.296 s (for data selection)
(from MET 619544658.304000 to MET 619544761.600000)
Estimated total fluence: 7988.320196 count
Created GTI with 5 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 21.428 63.048 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 21.428 63.048
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: 2020 8 19 16 323.666625 58.907218
Obj: 2020 8 19 16 151.574311 26.421801
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2020 8 19 16 279.574776 38.438766
Obj: 2020 8 19 16 148.000794 34.448522
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2020 8 19 16 277.020666 33.204381
Obj: 2020 8 19 16 147.280556 38.558788
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2020 8 19 16 255.953413 -2.102057
Obj: 2020 8 19 16 161.938921 41.878193
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2020 8 19 16 300.226435 -58.333401
Obj: 2020 8 19 16 190.964108 -6.515984
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2020 8 19 16 194.617772 -41.985641
Obj: 2020 8 19 16 208.715397 51.586896
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2020 8 19 16 75.357595 48.772865
Obj: 2020 8 19 16 174.746200 2.341888
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2020 8 19 16 197.360657 45.547689
Obj: 2020 8 19 16 148.735433 -38.101184
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger992099/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:
Wed Aug 19 12:01:04 EDT 2020