TDRSS lightcurve for Trigger=945344
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 20 Dec 19 13:30:50 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 945344, Seg_Num: 0
GRB_RA: 281.391d {+18h 45m 34s} (J2000),
281.592d {+18h 46m 22s} (current),
280.887d {+18h 43m 33s} (1950)
GRB_DEC: +26.667d {+26d 40' 02"} (J2000),
+26.689d {+26d 41' 22"} (current),
+26.613d {+26d 36' 48"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 44331 [cnts] Image_Peak=505 [image_cnts]
TRIGGER_DUR: 16.384 [sec]
TRIGGER_INDEX: 460 E_range: 15-50 keV
BKG_INTEN: 164739 [cnts]
BKG_TIME: 48479.87 SOD {13:27:59.87} UT
BKG_DUR: 64 [sec]
GRB_DATE: 18837 TJD; 354 DOY; 19/12/20
GRB_TIME: 48577.79 SOD {13:29:37.79} UT
GRB_PHI: -105.28 [deg]
GRB_THETA: 37.61 [deg]
SOLN_STATUS: 0x2003
RATE_SIGNIF: 8.88 [sigma]
IMAGE_SIGNIF: 7.80 [sigma]
MERIT_PARAMS: +1 +0 +0 +4 +1 -2 +0 +0 -61 +0
SUN_POSTN: 268.22d {+17h 52m 52s} -23.43d {-23d 25' 32"}
SUN_DIST: 51.76 [deg] Sun_angle= -0.9 [hr] (East of Sun)
MOON_POSTN: 196.94d {+13h 07m 45s} -1.53d {-01d 31' 56"}
MOON_DIST: 85.92 [deg]
MOON_ILLUM: 35 [%]
GAL_COORDS: 56.46, 13.00 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 285.76, 49.49 [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: There is a bright star (mag=4.83) 6.87 arcmin from this position.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 13.81,20.10 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 20 Dec 19 13:48:26 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 945344, Seg_Num: 0
GRB_RA: 281.391d {+18h 45m 34s} (J2000),
281.592d {+18h 46m 22s} (current),
280.887d {+18h 43m 33s} (1950)
GRB_DEC: +26.667d {+26d 40' 02"} (J2000),
+26.689d {+26d 41' 22"} (current),
+26.613d {+26d 36' 48"} (1950)
GRB_DATE: 18837 TJD; 354 DOY; 19/12/20
GRB_TIME: 48577.79 SOD {13:29:37.79} UT
TRIGGER_INDEX: 460
GRB_PHI: -105.28 [deg]
GRB_THETA: 37.61 [deg]
DELTA_TIME: -31.00 [sec]
TRIGGER_DUR: 16.384 [sec]
SOLN_STATUS: 0x2003
RATE_SIGNIF: 8.88 [sigma]
IMAGE_SIGNIF: 7.80 [sigma]
LC_URL: sw00945344000msb.lc
GCN template for BAT paragraph
Click here!
At 13:29:37 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 191220 ***A*** (trigger=945344). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 281.391, +26.667 which is
RA(J2000) = 18h 45m 34s
Dec(J2000) = +26d 40' 02"
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 ~1148 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: 16.512 s +/- 1.03197 s
Estimated T50 duration: 7.808 s +/- 0.461511 s
Estimated Peak Interval: MET 598541402.36800003 +/- 0.500000 s
Estimated background rate 1: 4556.428 near MET 598541389.376000 s
Estimated background rate 2: 4564.956 near MET 598541503.424000 s
Estimated total duration: 18.176 s (for data selection)
(from MET 598541401.152000 to MET 598541419.328000)
Estimated total fluence: 3552.983064 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 281.391 26.667 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 281.391 26.667
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: 2019 12 20 13 305.778746 4.967703
Obj: 2019 12 20 13 256.656316 27.402025
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2019 12 20 13 287.633990 -16.717059
Obj: 2019 12 20 13 237.579709 -0.802092
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2019 12 20 13 284.340805 -22.024168
Obj: 2019 12 20 13 234.185092 -4.046060
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2019 12 20 13 282.930976 -53.082923
Obj: 2019 12 20 13 209.667654 -36.985209
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2019 12 20 13 17.370717 -33.256581
Obj: 2019 12 20 13 87.211591 -64.149689
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2019 12 20 13 102.552515 -59.764757
Obj: 2019 12 20 13 138.437114 -15.110615
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2019 12 20 13 356.814407 37.716043
Obj: 2019 12 20 13 274.390256 75.566078
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2019 12 20 13 276.244910 40.172399
Obj: 2019 12 20 13 236.757173 2.626684
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger945344/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:
Fri Dec 20 08:48:43 EST 2019