TDRSS lightcurve for Trigger=958733
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 28 Feb 20 11:15:47 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 958733, Seg_Num: 0
GRB_RA: 252.026d {+16h 48m 06s} (J2000),
252.252d {+16h 49m 00s} (current),
251.466d {+16h 45m 52s} (1950)
GRB_DEC: +16.960d {+16d 57' 37"} (J2000),
+16.926d {+16d 55' 33"} (current),
+17.047d {+17d 02' 51"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 29390 [cnts] Image_Peak=388 [image_cnts]
TRIGGER_DUR: 8.192 [sec]
TRIGGER_INDEX: 454 E_range: 15-50 keV
BKG_INTEN: 215343 [cnts]
BKG_TIME: 40391.48 SOD {11:13:11.48} UT
BKG_DUR: 64 [sec]
GRB_DATE: 18907 TJD; 59 DOY; 20/02/28
GRB_TIME: 40481.15 SOD {11:14:41.15} UT
GRB_PHI: 145.68 [deg]
GRB_THETA: 39.30 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 9.74 [sigma]
IMAGE_SIGNIF: 7.13 [sigma]
MERIT_PARAMS: +1 +0 +0 +3 +1 -3 +0 +0 +2 +0
SUN_POSTN: 340.90d {+22h 43m 37s} -8.07d {-08d 04' 14"}
SUN_DIST: 91.07 [deg] Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN: 31.27d {+02h 05m 04s} +7.84d {+07d 50' 25"}
MOON_DIST: 132.51 [deg]
MOON_ILLUM: 20 [%]
GAL_COORDS: 35.45, 34.70 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 247.67, 39.02 [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 = 285.53,0.93 [deg].
COMMENTS:
COMMENTS: NOTE: This BAT event is temporally(2.0<100sec) coincident with the FERMI_GBM event (trignum=604581288).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 28 Feb 20 11:31:58 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 958733, Seg_Num: 0
GRB_RA: 252.026d {+16h 48m 06s} (J2000),
252.252d {+16h 49m 00s} (current),
251.466d {+16h 45m 52s} (1950)
GRB_DEC: +16.960d {+16d 57' 37"} (J2000),
+16.926d {+16d 55' 33"} (current),
+17.047d {+17d 02' 51"} (1950)
GRB_DATE: 18907 TJD; 59 DOY; 20/02/28
GRB_TIME: 40481.15 SOD {11:14:41.15} UT
TRIGGER_INDEX: 454
GRB_PHI: 145.68 [deg]
GRB_THETA: 39.30 [deg]
DELTA_TIME: -5.00 [sec]
TRIGGER_DUR: 8.192 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 9.74 [sigma]
IMAGE_SIGNIF: 7.13 [sigma]
LC_URL: sw00958733000msb.lc
GCN template for BAT paragraph
Click here!
At 11:14:41 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200228 ***A*** (trigger=958733). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 252.026, +16.960 which is
RA(J2000) = 16h 48m 06s
Dec(J2000) = +16d 57' 37"
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 ~2268 counts/sec (15-350 keV), at ~183 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: 183.744 s +/- 44.0574 s
Estimated T50 duration: 183.744 s +/- 96.7465 s
Estimated Peak Interval: MET 604581308.16000009 +/- 0.500000 s
Estimated background rate 1: 5584.058 near MET 604581292.640000 s
Estimated background rate 2: 7546.143 near MET 604581489.472000 s
Estimated total duration: 183.744 s (for data selection)
(from MET 604581303.680000 to MET 604581487.424000)
Estimated total fluence: -173708.754571 count
Created GTI with 10 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 252.026 16.960 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 252.026 16.960
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 28 11 272.848506 -9.397052
Obj: 2020 2 28 11 342.839958 67.104207
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2020 2 28 11 254.515792 -37.626189
Obj: 2020 2 28 11 281.917929 50.183759
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2020 2 28 11 248.657458 -41.887216
Obj: 2020 2 28 11 279.465551 44.915022
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2020 2 28 11 206.653269 -76.942356
Obj: 2020 2 28 11 255.411137 9.743320
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2020 2 28 11 58.976812 -28.428603
Obj: 2020 2 28 11 282.799493 -51.835004
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2020 2 28 11 96.911145 -24.173514
Obj: 2020 2 28 11 206.278064 -34.435875
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2020 2 28 11 310.633536 39.010304
Obj: 2020 2 28 11 87.923470 40.900569
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2020 2 28 11 276.801053 4.342679
Obj: 2020 2 28 11 181.285754 42.701798
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger958733/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 Feb 28 06:32:23 EST 2020