TDRSS lightcurve for Trigger=1037339
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 18 Mar 21 03:55:17 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1037339, Seg_Num: 0
GRB_RA: 33.930d {+02h 15m 43s} (J2000),
34.151d {+02h 16m 36s} (current),
33.410d {+02h 13m 38s} (1950)
GRB_DEC: -37.789d {-37d 47' 21"} (J2000),
-37.692d {-37d 41' 29"} (current),
-38.021d {-38d 01' 15"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 7325 [cnts] Image_Peak=242 [image_cnts]
TRIGGER_DUR: 3.072 [sec]
TRIGGER_INDEX: 474 E_range: 25-100 keV
BKG_INTEN: 65114 [cnts]
BKG_TIME: 14029.31 SOD {03:53:49.31} UT
BKG_DUR: 32 [sec]
GRB_DATE: 19291 TJD; 77 DOY; 21/03/18
GRB_TIME: 14071.68 SOD {03:54:31.68} UT
GRB_PHI: -152.43 [deg]
GRB_THETA: 30.47 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 11.26 [sigma]
IMAGE_SIGNIF: 7.72 [sigma]
MERIT_PARAMS: +1 +0 +0 +2 +2 -2 +0 +0 -64 +0
SUN_POSTN: 357.96d {+23h 51m 51s} -0.88d {-00d 53' 00"}
SUN_DIST: 49.61 [deg] Sun_angle= -2.4 [hr] (East of Sun)
MOON_POSTN: 48.31d {+03h 13m 15s} +15.91d {+15d 54' 37"}
MOON_DIST: 55.23 [deg]
MOON_ILLUM: 20 [%]
GAL_COORDS: 249.28,-69.34 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 13.79,-47.53 [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 = 181.38,11.18 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Thu 18 Mar 21 04:14:39 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1037339, Seg_Num: 0
GRB_RA: 33.930d {+02h 15m 43s} (J2000),
34.151d {+02h 16m 36s} (current),
33.410d {+02h 13m 38s} (1950)
GRB_DEC: -37.789d {-37d 47' 21"} (J2000),
-37.692d {-37d 41' 29"} (current),
-38.021d {-38d 01' 15"} (1950)
GRB_DATE: 19291 TJD; 77 DOY; 21/03/18
GRB_TIME: 14071.68 SOD {03:54:31.68} UT
TRIGGER_INDEX: 474
GRB_PHI: -152.43 [deg]
GRB_THETA: 30.47 [deg]
DELTA_TIME: -76.00 [sec]
TRIGGER_DUR: 3.072 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 11.26 [sigma]
IMAGE_SIGNIF: 7.72 [sigma]
LC_URL: sw01037339000msb.lc
GCN template for BAT paragraph
Click here!
At 03:54:31 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210318 ***A*** (trigger=1037339). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 33.930, -37.789 which is
RA(J2000) = 02h 15m 43s
Dec(J2000) = -37d 47' 21"
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 ~1125 counts/sec (15-350 keV), at ~2 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: 28.032 s +/- 1.03197 s
Estimated T50 duration: 14.72 s +/- 0.286217 s
Estimated Peak Interval: MET 637732500.16000009 +/- 0.500000 s
Estimated background rate 1: 4126.073 near MET 637732485.248000 s
Estimated background rate 2: 4057.943 near MET 637732606.720000 s
Estimated total duration: 33.024 s (for data selection)
(from MET 637732496.896000 to MET 637732529.920000)
Estimated total fluence: 6961.999968 count
Created GTI with 4 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 33.930 -37.789 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 33.930 -37.789
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: 2021 3 18 4 150.267909 -47.973228
Obj: 2021 3 18 4 73.477381 -47.108751
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2021 3 18 4 110.494500 -31.049472
Obj: 2021 3 18 4 56.828141 -19.062499
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2021 3 18 4 107.245191 -25.738948
Obj: 2021 3 18 4 54.929343 -15.819115
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2021 3 18 4 86.441162 7.172256
Obj: 2021 3 18 4 36.674273 18.096334
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2021 3 18 4 135.288388 50.543887
Obj: 2021 3 18 4 311.542396 79.801250
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2021 3 18 4 16.853791 53.487593
Obj: 2021 3 18 4 338.865468 13.857664
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2021 3 18 4 240.732657 -43.093514
Obj: 2021 3 18 4 343.191671 -80.624224
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2021 3 18 4 24.842973 -56.259418
Obj: 2021 3 18 4 37.502262 -7.683158
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1037339/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 Mar 18 00:15:04 EDT 2021