TDRSS lightcurve for Trigger=1164980
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 20 Apr 23 10:19:40 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1164980, Seg_Num: 0
GRB_RA: 161.013d {+10h 44m 03s} (J2000),
161.338d {+10h 45m 21s} (current),
160.314d {+10h 41m 15s} (1950)
GRB_DEC: +32.087d {+32d 05' 11"} (J2000),
+31.964d {+31d 57' 49"} (current),
+32.349d {+32d 20' 57"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 6310 [cnts] Image_Peak=257 [image_cnts]
TRIGGER_DUR: 4.096 [sec]
TRIGGER_INDEX: 298 E_range: 25-100 keV
BKG_INTEN: 49004 [cnts]
BKG_TIME: 37080.86 SOD {10:18:00.86} UT
BKG_DUR: 40 [sec]
GRB_DATE: 20054 TJD; 110 DOY; 23/04/20
GRB_TIME: 37141.08 SOD {10:19:01.08} UT
GRB_PHI: -162.79 [deg]
GRB_THETA: 10.48 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 11.87 [sigma]
IMAGE_SIGNIF: 7.98 [sigma]
MERIT_PARAMS: +1 +0 +0 +2 +2 -2 +0 +0 +46 +0
SUN_POSTN: 28.00d {+01h 52m 00s} +11.50d {+11d 30' 08"}
SUN_DIST: 117.71 [deg] Sun_angle= -8.9 [hr] (East of Sun)
MOON_POSTN: 31.13d {+02h 04m 31s} +12.68d {+12d 40' 31"}
MOON_DIST: 114.72 [deg]
MOON_ILLUM: 0 [%]
GAL_COORDS: 195.01, 61.98 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 149.91, 22.19 [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 = 150.82,-8.29 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 20 Apr 23 10:39:37 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1164980, Seg_Num: 0
GRB_RA: 161.013d {+10h 44m 03s} (J2000),
161.338d {+10h 45m 21s} (current),
160.314d {+10h 41m 15s} (1950)
GRB_DEC: +32.087d {+32d 05' 11"} (J2000),
+31.964d {+31d 57' 49"} (current),
+32.349d {+32d 20' 57"} (1950)
GRB_DATE: 20054 TJD; 110 DOY; 23/04/20
GRB_TIME: 37141.08 SOD {10:19:01.08} UT
TRIGGER_INDEX: 298
GRB_PHI: -162.79 [deg]
GRB_THETA: 10.48 [deg]
DELTA_TIME: 57.00 [sec]
TRIGGER_DUR: 4.096 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 11.87 [sigma]
IMAGE_SIGNIF: 7.98 [sigma]
LC_URL: sw01164980000msb.lc
GCN template for BAT paragraph
Click here!
At 10:19:01 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230420 ***A*** (trigger=1164980). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 161.013, +32.087 which is
RA(J2000) = 10h 44m 03s
Dec(J2000) = +32d 05' 11"
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 ~1007 counts/sec (15-350 keV), at ~1 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: 94.848 s +/- 4.10399 s
Estimated T50 duration: 60.16 s +/- 2.90196 s
Estimated Peak Interval: MET 703678825.59999990 +/- 0.500000 s
Estimated background rate 1: 2473.680 near MET 703678760.768000 s
Estimated background rate 2: 2322.394 near MET 703678919.808000 s
Estimated total duration: 108.16 s (for data selection)
(from MET 703678772.736000 to MET 703678880.896000)
Estimated total fluence: 10280.076054 count
Created GTI with 8 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 161.013 32.087 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 161.013 32.087
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 4 20 10 250.227779 -5.702883
Obj: 2023 4 20 10 132.417727 0.439018
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2023 4 20 10 227.150533 -33.015636
Obj: 2023 4 20 10 116.173474 19.502853
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2023 4 20 10 220.682032 -35.316748
Obj: 2023 4 20 10 113.196733 24.783296
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2023 4 20 10 169.347443 -58.178229
Obj: 2023 4 20 10 116.776280 51.464869
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2023 4 20 10 85.015682 -30.514604
Obj: 2023 4 20 10 193.610581 25.238756
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2023 4 20 10 106.385289 -3.374831
Obj: 2023 4 20 10 266.539677 63.907667
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2023 4 20 10 280.842829 41.990209
Obj: 2023 4 20 10 178.563903 -29.298554
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2023 4 20 10 265.492335 -15.427040
Obj: 2023 4 20 10 106.786054 -43.797685
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1164980/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:
Thu Apr 20 06:40:03 EDT 2023