TDRSS lightcurve for Trigger=958592
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 27 Feb 20 07:20:23 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 958592, Seg_Num: 0
GRB_RA: 56.436d {+03h 45m 45s} (J2000),
56.710d {+03h 46m 50s} (current),
55.757d {+03h 43m 02s} (1950)
GRB_DEC: +9.491d {+09d 29' 27"} (J2000),
+9.553d {+09d 33' 10"} (current),
+9.336d {+09d 20' 08"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 3397 [cnts] Image_Peak=198 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 146 E_range: 25-100 keV
BKG_INTEN: 20628 [cnts]
BKG_TIME: 26391.49 SOD {07:19:51.49} UT
BKG_DUR: 8 [sec]
GRB_DATE: 18906 TJD; 58 DOY; 20/02/27
GRB_TIME: 26408.00 SOD {07:20:08.00} UT
GRB_PHI: -22.82 [deg]
GRB_THETA: 42.23 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 13.78 [sigma]
IMAGE_SIGNIF: 10.47 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 +0 +0 +0 -20 +0
SUN_POSTN: 339.81d {+22h 39m 14s} -8.51d {-08d 30' 30"}
SUN_DIST: 78.67 [deg] Sun_angle= -5.1 [hr] (East of Sun)
MOON_POSTN: 18.53d {+01h 14m 07s} +2.51d {+02d 30' 33"}
MOON_DIST: 38.58 [deg]
MOON_ILLUM: 12 [%]
GAL_COORDS: 178.13,-34.11 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 56.36,-10.12 [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 = 157.90,-6.71 [deg].
COMMENTS:
COMMENTS: NOTE: This BAT event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=604480813).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 27 Feb 20 07:39:25 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 958592, Seg_Num: 0
GRB_RA: 56.436d {+03h 45m 45s} (J2000),
56.710d {+03h 46m 50s} (current),
55.757d {+03h 43m 02s} (1950)
GRB_DEC: +9.491d {+09d 29' 27"} (J2000),
+9.553d {+09d 33' 10"} (current),
+9.336d {+09d 20' 08"} (1950)
GRB_DATE: 18906 TJD; 58 DOY; 20/02/27
GRB_TIME: 26408.00 SOD {07:20:08.00} UT
TRIGGER_INDEX: 146
GRB_PHI: -22.82 [deg]
GRB_THETA: 42.23 [deg]
DELTA_TIME: -50.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 13.78 [sigma]
IMAGE_SIGNIF: 10.47 [sigma]
LC_URL: sw00958592000msb.lc
GCN template for BAT paragraph
Click here!
At 07:20:08 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200227 ***A*** (trigger=958592). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 56.436, +9.491 which is
RA(J2000) = 03h 45m 45s
Dec(J2000) = +09d 29' 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 ~4685 counts/sec (15-350 keV), at ~8 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: 43.904 s +/- 2.89772 s
Estimated T50 duration: 9.472 s +/- 0.256 s
Estimated Peak Interval: MET 604480840.00000000 +/- 0.500000 s
Estimated background rate 1: 5009.409 near MET 604480819.904000 s
Estimated background rate 2: 5038.932 near MET 604480960.576000 s
Estimated total duration: 71.424 s (for data selection)
(from MET 604480831.808000 to MET 604480903.232000)
Estimated total fluence: 62549.310925 count
Created GTI with 14 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 56.436 9.491 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 56.436 9.491
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 2 27 7 222.138892 -52.491297
Obj: 2020 2 27 7 122.937815 -21.264265
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2020 2 27 7 156.899665 -65.187131
Obj: 2020 2 27 7 99.961971 2.019456
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2020 2 27 7 146.432803 -61.320471
Obj: 2020 2 27 7 96.667859 7.252353
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2020 2 27 7 94.077076 -36.527080
Obj: 2020 2 27 7 85.097318 41.720420
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2020 2 27 7 92.832446 21.124136
Obj: 2020 2 27 7 189.802591 48.657824
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2020 2 27 7 60.422787 23.476683
Obj: 2020 2 27 7 314.058727 57.313762
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2020 2 27 7 274.378058 -9.865214
Obj: 2020 2 27 7 190.265962 -51.205674
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2020 2 27 7 318.239000 -41.487530
Obj: 2020 2 27 7 74.475790 -41.990582
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger958592/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 Feb 27 02:39:42 EST 2020