TDRSS lightcurve for Trigger=953689
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 31 Jan 20 22:41:36 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 953689, Seg_Num: 0
GRB_RA: 3.095d {+00h 12m 23s} (J2000),
3.361d {+00h 13m 27s} (current),
2.438d {+00h 09m 45s} (1950)
GRB_DEC: +51.124d {+51d 07' 25"} (J2000),
+51.235d {+51d 14' 07"} (current),
+50.846d {+50d 50' 44"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 30074 [cnts] Image_Peak=6041 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 146 E_range: 25-100 keV
BKG_INTEN: 19933 [cnts]
BKG_TIME: 81663.64 SOD {22:41:03.64} UT
BKG_DUR: 8 [sec]
GRB_DATE: 18879 TJD; 31 DOY; 20/01/31
GRB_TIME: 81675.99 SOD {22:41:15.99} UT
GRB_PHI: -16.42 [deg]
GRB_THETA: 23.15 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 255.99 [sigma]
IMAGE_SIGNIF: 25.71 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 +9 +0 +0 -16 +0
SUN_POSTN: 313.98d {+20h 55m 55s} -17.32d {-17d 19' 29"}
SUN_DIST: 80.97 [deg] Sun_angle= -3.3 [hr] (East of Sun)
MOON_POSTN: 28.79d {+01h 55m 10s} +6.62d {+06d 36' 59"}
MOON_DIST: 49.34 [deg]
MOON_ILLUM: 39 [%]
GAL_COORDS: 116.70,-11.28 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 28.53, 44.49 [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: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 310.10,9.30 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 31 Jan 20 22:59:01 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 953689, Seg_Num: 0
GRB_RA: 3.095d {+00h 12m 23s} (J2000),
3.361d {+00h 13m 27s} (current),
2.438d {+00h 09m 45s} (1950)
GRB_DEC: +51.124d {+51d 07' 25"} (J2000),
+51.235d {+51d 14' 07"} (current),
+50.846d {+50d 50' 44"} (1950)
GRB_DATE: 18879 TJD; 31 DOY; 20/01/31
GRB_TIME: 81675.99 SOD {22:41:15.99} UT
TRIGGER_INDEX: 146
GRB_PHI: -16.42 [deg]
GRB_THETA: 23.15 [deg]
DELTA_TIME: 44.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 255.99 [sigma]
IMAGE_SIGNIF: 25.71 [sigma]
LC_URL: sw00953689000msb.lc
GCN template for BAT paragraph
Click here!
At 22:41:15 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200131 ***A*** (trigger=953689). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 3.095, +51.124 which is
RA(J2000) = 00h 12m 23s
Dec(J2000) = +51d 07' 25"
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 ~60828 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: 33.856 s +/- 0.758609 s
Estimated T50 duration: 1.664 s +/- 0.128 s
Estimated Peak Interval: MET 602203300.92799997 +/- 0.500000 s
Estimated background rate 1: 4895.288 near MET 602203286.880000 s
Estimated background rate 2: 4870.135 near MET 602203431.424000 s
Estimated total duration: 79.168 s (for data selection)
(from MET 602203296.960000 to MET 602203376.128000)
Estimated total fluence: 114949.017385 count
Created GTI with 33 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 3.095 51.124 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 3.095 51.124
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 1 31 22 63.540744 4.270469
Obj: 2020 1 31 22 137.890685 71.495701
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2020 1 31 22 39.734738 30.412358
Obj: 2020 1 31 22 203.938566 67.837286
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2020 1 31 22 33.449388 32.084997
Obj: 2020 1 31 22 213.290287 66.875943
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2020 1 31 22 345.550555 51.693959
Obj: 2020 1 31 22 220.653642 34.743682
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2020 1 31 22 272.883719 30.118080
Obj: 2020 1 31 22 226.972807 -38.651508
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2020 1 31 22 289.081836 -2.939927
Obj: 2020 1 31 22 208.453031 5.872145
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2020 1 31 22 91.764644 -41.449576
Obj: 2020 1 31 22 135.511658 28.728365
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2020 1 31 22 81.752638 21.157096
Obj: 2020 1 31 22 164.140792 5.292637
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger953689/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 Jan 31 17:59:22 EST 2020