TDRSS lightcurve for Trigger=1069242
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 18 Aug 21 16:18:15 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1069242, Seg_Num: 0
GRB_RA: 299.819d {+19h 59m 16s} (J2000),
300.022d {+20h 00m 05s} (current),
299.349d {+19h 57m 24s} (1950)
GRB_DEC: +35.277d {+35d 16' 37"} (J2000),
+35.337d {+35d 20' 13"} (current),
+35.140d {+35d 08' 22"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=2541 [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: 19444 TJD; 230 DOY; 21/08/18
GRB_TIME: 58620.42 SOD {16:17:00.42} UT
GRB_PHI: 163.72 [deg]
GRB_THETA: 24.92 [deg]
SOLN_STATUS: 0x113
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 12.49 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 +2 +0 +1 +57 +0
SUN_POSTN: 148.19d {+09h 52m 46s} +12.87d {+12d 52' 11"}
SUN_DIST: 124.91 [deg] Sun_angle= -10.1 [hr] (East of Sun)
MOON_POSTN: 276.82d {+18h 27m 18s} -25.80d {-25d 47' 53"}
MOON_DIST: 64.95 [deg]
MOON_ILLUM: 82 [%]
GAL_COORDS: 71.50, 2.95 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 314.02, 54.25 [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: Cyg X-1, delta=0.201 [deg].
COMMENTS: This is not a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 137.49,19.89 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 18 Aug 21 16:33:45 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1069242, Seg_Num: 0
GRB_RA: 299.819d {+19h 59m 16s} (J2000),
300.022d {+20h 00m 05s} (current),
299.349d {+19h 57m 24s} (1950)
GRB_DEC: +35.277d {+35d 16' 37"} (J2000),
+35.337d {+35d 20' 13"} (current),
+35.140d {+35d 08' 22"} (1950)
GRB_DATE: 19444 TJD; 230 DOY; 21/08/18
GRB_TIME: 58620.42 SOD {16:17:00.42} UT
TRIGGER_INDEX: 20000
GRB_PHI: 163.72 [deg]
GRB_THETA: 24.92 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x113
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 12.49 [sigma]
LC_URL: sw01069242000msb.lc
GCN template for BAT paragraph
Click here!
At 16:17:00 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210818 ***A*** (trigger=1069242). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 299.819, +35.277 which is
RA(J2000) = 19h 59m 16s
Dec(J2000) = +35d 16' 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 ~1101 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
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 background rate 1: 5273.269 near MET 650996271.616000 s
Estimated background rate 2: 5352.757 near MET 650996376.576000 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 299.819 35.277 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 299.819 35.277
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: 2021 8 18 16 323.169401 59.231447
Obj: 2021 8 18 16 188.302874 -15.140647
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2021 8 18 16 279.081310 38.584695
Obj: 2021 8 18 16 159.290410 -19.276065
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2021 8 18 16 276.562441 33.358103
Obj: 2021 8 18 16 154.811150 -15.774842
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2021 8 18 16 255.548048 -2.023711
Obj: 2021 8 18 16 130.285830 -4.737119
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2021 8 18 16 299.725051 -58.651853
Obj: 2021 8 18 16 137.353600 5.218325
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2021 8 18 16 194.409256 -41.603616
Obj: 2021 8 18 16 103.098327 58.038703
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2021 8 18 16 75.842855 49.034924
Obj: 2021 8 18 16 229.545051 1.113138
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2021 8 18 16 197.305649 45.136699
Obj: 2021 8 18 16 245.121889 -75.890053
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1069242/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 18 12:35:23 EDT 2021