TDRSS lightcurve for Trigger=969823
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 06 May 20 17:37:03 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 969823, Seg_Num: 0
GRB_RA: 274.498d {+18h 18m 00s} (J2000),
274.791d {+18h 19m 10s} (current),
273.777d {+18h 15m 06s} (1950)
GRB_DEC: -16.152d {-16d 09' 06"} (J2000),
-16.143d {-16d 08' 33"} (current),
-16.172d {-16d 10' 18"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 94 [cnts] Image_Peak=25 [image_cnts]
TRIGGER_DUR: 0.004 [sec]
TRIGGER_INDEX: 10009 E_range: 15-50 keV
BKG_INTEN: 20871 [cnts]
BKG_TIME: 63399.10 SOD {17:36:39.10} UT
BKG_DUR: 8 [sec]
GRB_DATE: 18975 TJD; 127 DOY; 20/05/06
GRB_TIME: 63409.98 SOD {17:36:49.98} UT
GRB_PHI: 71.59 [deg]
GRB_THETA: 12.67 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 24.97 [sigma]
IMAGE_SIGNIF: 7.41 [sigma]
MERIT_PARAMS: +1 +0 +0 -8 +1 -2 +0 +1 +66 +0
SUN_POSTN: 44.18d {+02h 56m 43s} +16.81d {+16d 48' 36"}
SUN_DIST: 131.60 [deg] Sun_angle= 8.6 [hr] (West of Sun)
MOON_POSTN: 215.77d {+14h 23m 04s} -9.95d {-09d 57' 01"}
MOON_DIST: 57.66 [deg]
MOON_ILLUM: 99 [%]
GAL_COORDS: 14.80, -0.15 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 274.35, 7.22 [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 = 182.89,-1.79 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 06 May 20 17:56:26 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 969823, Seg_Num: 0
GRB_RA: 274.498d {+18h 18m 00s} (J2000),
274.791d {+18h 19m 10s} (current),
273.777d {+18h 15m 06s} (1950)
GRB_DEC: -16.152d {-16d 09' 06"} (J2000),
-16.143d {-16d 08' 33"} (current),
-16.172d {-16d 10' 18"} (1950)
GRB_DATE: 18975 TJD; 127 DOY; 20/05/06
GRB_TIME: 63410.17 SOD {17:36:50.17} UT
TRIGGER_INDEX: 10009
GRB_PHI: 71.59 [deg]
GRB_THETA: 12.67 [deg]
DELTA_TIME: 13.00 [sec]
TRIGGER_DUR: 0.004 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 24.97 [sigma]
IMAGE_SIGNIF: 7.41 [sigma]
LC_URL: sw00969823000msb.lc
GCN template for BAT paragraph
Click here!
At 17:36:50 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200506 ***A*** (trigger=969823). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 274.498, -16.152 which is
RA(J2000) = 18h 18m 00s
Dec(J2000) = -16d 09' 06"
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 ~1523 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: 8.192 s +/- 1.024 s
Estimated T50 duration: 2.048 s +/- 4.57947 s
Estimated Peak Interval: MET 610479469.05599999 +/- 0.500000 s
Estimated background rate 1: 4358.035 near MET 610479437.312000 s
Estimated background rate 2: 4649.683 near MET 610479546.880000 s
Estimated total duration: 9.216 s (for data selection)
(from MET 610479463.424000 to MET 610479472.640000)
Estimated total fluence: 508.437941 count
Created GTI with 3 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 274.498 -16.152 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 274.498 -16.152
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 5 6 17 356.138491 67.754872
Obj: 2020 5 6 17 101.536661 -39.296313
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2020 5 6 17 286.343103 54.553038
Obj: 2020 5 6 17 78.054391 -11.621505
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2020 5 6 17 283.518751 49.246905
Obj: 2020 5 6 17 75.292552 -7.095919
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2020 5 6 17 257.083186 14.609355
Obj: 2020 5 6 17 56.910889 29.661595
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2020 5 6 17 279.144196 -47.284213
Obj: 2020 5 6 17 201.901195 73.824740
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2020 5 6 17 211.914576 -32.387433
Obj: 2020 5 6 17 332.948791 34.958291
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2020 5 6 17 90.424987 36.153096
Obj: 2020 5 6 17 208.027551 -75.910408
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2020 5 6 17 174.301165 42.637149
Obj: 2020 5 6 17 50.334991 -25.678459
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger969823/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 May 6 13:56:43 EDT 2020