TDRSS lightcurve for Trigger=1156572
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Tue 28 Feb 23 05:51:11 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1156572, Seg_Num: 0
GRB_RA: 18.403d {+01h 13m 37s} (J2000),
18.740d {+01h 14m 58s} (current),
17.678d {+01h 10m 43s} (1950)
GRB_DEC: +44.489d {+44d 29' 19"} (J2000),
+44.611d {+44d 36' 39"} (current),
+44.224d {+44d 13' 26"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 1935 [cnts] Image_Peak=210 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 146 E_range: 25-100 keV
BKG_INTEN: 8315 [cnts]
BKG_TIME: 21033.16 SOD {05:50:33.16} UT
BKG_DUR: 8 [sec]
GRB_DATE: 20003 TJD; 59 DOY; 23/02/28
GRB_TIME: 21050.25 SOD {05:50:50.25} UT
GRB_PHI: 177.68 [deg]
GRB_THETA: 30.83 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 25.03 [sigma]
IMAGE_SIGNIF: 11.96 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 +1 +0 +0 -46 +0
SUN_POSTN: 340.95d {+22h 43m 48s} -8.05d {-08d 03' 09"}
SUN_DIST: 62.70 [deg] Sun_angle= -2.5 [hr] (East of Sun)
MOON_POSTN: 78.33d {+05h 13m 19s} +26.53d {+26d 31' 35"}
MOON_DIST: 50.50 [deg]
MOON_ILLUM: 59 [%]
GAL_COORDS: 127.09,-18.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 35.64, 33.60 [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 = 91.38,8.91 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Tue 28 Feb 23 06:09:59 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1156572, Seg_Num: 0
GRB_RA: 18.403d {+01h 13m 37s} (J2000),
18.740d {+01h 14m 58s} (current),
17.678d {+01h 10m 43s} (1950)
GRB_DEC: +44.489d {+44d 29' 19"} (J2000),
+44.611d {+44d 36' 39"} (current),
+44.224d {+44d 13' 26"} (1950)
GRB_DATE: 20003 TJD; 59 DOY; 23/02/28
GRB_TIME: 21050.25 SOD {05:50:50.25} UT
TRIGGER_INDEX: 146
GRB_PHI: 177.68 [deg]
GRB_THETA: 30.83 [deg]
DELTA_TIME: 51.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 25.03 [sigma]
IMAGE_SIGNIF: 11.96 [sigma]
LC_URL: sw01156572000msb.lc
GCN template for BAT paragraph
Click here!
At 05:50:50 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230228 ***A*** (trigger=1156572). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 18.403, +44.489 which is
RA(J2000) = 01h 13m 37s
Dec(J2000) = +44d 29' 19"
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 ~2109 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
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: 59.648 s +/- 2.89772 s
Estimated T50 duration: 28.16 s +/- 2.048 s
Estimated Peak Interval: MET 699256281.85599995 +/- 0.500000 s
Estimated background rate 1: 2058.223 near MET 699256269.056000 s
Estimated background rate 2: 2007.749 near MET 699256412.224000 s
Estimated total duration: 76.416 s (for data selection)
(from MET 699256280.512000 to MET 699256356.928000)
Estimated total fluence: 3508.178771 count
Created GTI with 6 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 18.403 44.489 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 18.403 44.489
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: 2023 2 28 6 197.845276 -57.918962
Obj: 2023 2 28 6 160.247001 -2.618119
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2023 2 28 6 130.726188 -57.165050
Obj: 2023 2 28 6 140.743760 4.978307
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2023 2 28 6 124.994285 -52.161272
Obj: 2023 2 28 6 137.875486 9.531090
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2023 2 28 6 89.257835 -22.338394
Obj: 2023 2 28 6 130.918419 25.619666
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2023 2 28 6 101.926048 33.544034
Obj: 2023 2 28 6 167.239354 12.383153
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2023 2 28 6 48.363018 33.856253
Obj: 2023 2 28 6 175.903929 79.755266
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2023 2 28 6 266.766462 -22.738933
Obj: 2023 2 28 6 201.760878 -11.507534
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2023 2 28 6 336.488459 -48.899455
Obj: 2023 2 28 6 135.244044 -67.340596
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1156572/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:
Tue Feb 28 01:10:23 EST 2023