TDRSS lightcurve for Trigger=1073893
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 19 Sep 21 00:29:01 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1073893, Seg_Num: 0
GRB_RA: 80.230d {+05h 20m 55s} (J2000),
80.511d {+05h 22m 03s} (current),
79.583d {+05h 18m 20s} (1950)
GRB_DEC: +1.274d {+01d 16' 27"} (J2000),
+1.294d {+01d 17' 40"} (current),
+1.225d {+01d 13' 31"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 1159 [cnts] Image_Peak=101 [image_cnts]
TRIGGER_DUR: 0.256 [sec]
TRIGGER_INDEX: 38 E_range: 25-100 keV
BKG_INTEN: 18345 [cnts]
BKG_TIME: 1700.24 SOD {00:28:20.24} UT
BKG_DUR: 8 [sec]
GRB_DATE: 19476 TJD; 262 DOY; 21/09/19
GRB_TIME: 1713.55 SOD {00:28:33.55} UT
GRB_PHI: -12.32 [deg]
GRB_THETA: 42.62 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 24.28 [sigma]
IMAGE_SIGNIF: 8.91 [sigma]
MERIT_PARAMS: +1 +0 +0 -2 +2 -1 +0 +0 +11 +0
SUN_POSTN: 176.61d {+11h 46m 26s} +1.47d {+01d 28' 09"}
SUN_DIST: 96.06 [deg] Sun_angle= 6.4 [hr] (West of Sun)
MOON_POSTN: 336.09d {+22h 24m 23s} -15.40d {-15d 23' 46"}
MOON_DIST: 104.24 [deg]
MOON_ILLUM: 96 [%]
GAL_COORDS: 200.99,-19.40 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 79.47,-21.81 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
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 = 57.10,3.35 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 19 Sep 21 00:45:27 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1073893, Seg_Num: 0
GRB_RA: 80.230d {+05h 20m 55s} (J2000),
80.511d {+05h 22m 03s} (current),
79.583d {+05h 18m 20s} (1950)
GRB_DEC: +1.274d {+01d 16' 27"} (J2000),
+1.294d {+01d 17' 40"} (current),
+1.225d {+01d 13' 31"} (1950)
GRB_DATE: 19476 TJD; 262 DOY; 21/09/19
GRB_TIME: 1713.55 SOD {00:28:33.55} UT
TRIGGER_INDEX: 38
GRB_PHI: -12.32 [deg]
GRB_THETA: 42.62 [deg]
DELTA_TIME: -51.00 [sec]
TRIGGER_DUR: 0.256 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 24.28 [sigma]
IMAGE_SIGNIF: 8.91 [sigma]
LC_URL: sw01073893000msb.lc
GCN template for BAT paragraph
Click here!
At 00:28:33 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210919 ***A*** (trigger=1073893). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 80.230, +1.274 which is
RA(J2000) = 05h 20m 55s
Dec(J2000) = +01d 16' 27"
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 ~4070 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: 123.904 s +/- 8.192 s
Estimated T50 duration: 68.608 s +/- 21.8592 s
Estimated Peak Interval: MET 653704141.82399988 +/- 0.500000 s
Estimated background rate 1: 4839.478 near MET 653704129.088000 s
Estimated background rate 2: 4784.023 near MET 653704298.048000 s
Estimated total duration: 128 s (for data selection)
(from MET 653704141.376000 to MET 653704269.376000)
Estimated total fluence: 4911.676512 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 80.230 1.274 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 80.230 1.274
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 9 19 0 100.166329 -10.040841
Obj: 2021 9 19 0 209.631298 -45.647878
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2021 9 19 0 80.557119 17.563676
Obj: 2021 9 19 0 155.799062 -54.551562
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2021 9 19 0 76.381576 22.175772
Obj: 2021 9 19 0 147.789349 -50.697176
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2021 9 19 0 56.851029 58.963189
Obj: 2021 9 19 0 103.177853 -29.099000
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2021 9 19 0 226.549831 46.630070
Obj: 2021 9 19 0 104.052878 19.431524
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2021 9 19 0 296.867452 35.571883
Obj: 2021 9 19 0 65.443911 33.180345
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2021 9 19 0 149.030350 -55.752422
Obj: 2021 9 19 0 263.631199 -8.827697
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2021 9 19 0 80.871094 -18.022871
Obj: 2021 9 19 0 314.570382 -51.839800
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1073893/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:
Sat Sep 18 20:47:24 EDT 2021