TDRSS lightcurve for Trigger=1037828
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 21 Mar 21 07:14:19 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1037828, Seg_Num: 0
GRB_RA: 87.874d {+05h 51m 30s} (J2000),
88.472d {+05h 53m 53s} (current),
86.465d {+05h 45m 51s} (1950)
GRB_DEC: +70.119d {+70d 07' 09"} (J2000),
+70.123d {+70d 07' 23"} (current),
+70.106d {+70d 06' 20"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 4930 [cnts] Image_Peak=165 [image_cnts]
TRIGGER_DUR: 2.048 [sec]
TRIGGER_INDEX: 255 E_range: 15-50 keV
BKG_INTEN: 47356 [cnts]
BKG_TIME: 25997.29 SOD {07:13:17.29} UT
BKG_DUR: 24 [sec]
GRB_DATE: 19294 TJD; 80 DOY; 21/03/21
GRB_TIME: 26031.02 SOD {07:13:51.02} UT
GRB_PHI: -109.54 [deg]
GRB_THETA: 35.04 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 15.81 [sigma]
IMAGE_SIGNIF: 7.40 [sigma]
MERIT_PARAMS: +1 +0 +0 +1 +1 -3 +0 +0 -2 +0
SUN_POSTN: 0.82d {+00h 03m 18s} +0.36d {+00d 21' 25"}
SUN_DIST: 88.87 [deg] Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN: 87.07d {+05h 48m 17s} +24.66d {+24d 39' 34"}
MOON_DIST: 45.47 [deg]
MOON_ILLUM: 47 [%]
GAL_COORDS: 143.47, 20.52 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 88.95, 46.69 [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 = 226.61,-20.42 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 21 Mar 21 07:31:00 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1037828, Seg_Num: 0
GRB_RA: 87.874d {+05h 51m 30s} (J2000),
88.472d {+05h 53m 53s} (current),
86.465d {+05h 45m 51s} (1950)
GRB_DEC: +70.119d {+70d 07' 09"} (J2000),
+70.123d {+70d 07' 23"} (current),
+70.106d {+70d 06' 20"} (1950)
GRB_DATE: 19294 TJD; 80 DOY; 21/03/21
GRB_TIME: 26031.02 SOD {07:13:51.02} UT
TRIGGER_INDEX: 255
GRB_PHI: -109.54 [deg]
GRB_THETA: 35.04 [deg]
DELTA_TIME: -11.00 [sec]
TRIGGER_DUR: 2.048 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 15.81 [sigma]
IMAGE_SIGNIF: 7.40 [sigma]
LC_URL: sw01037828000msb.lc
GCN template for BAT paragraph
Click here!
At 07:13:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210321 ***A*** (trigger=1037828). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 87.874, +70.119 which is
RA(J2000) = 05h 51m 30s
Dec(J2000) = +70d 07' 09"
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 ~1343 counts/sec (15-350 keV), at ~1 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: 9.856 s +/- 0.256 s
Estimated T50 duration: 5.632 s +/- 0.32 s
Estimated Peak Interval: MET 638003659.26399994 +/- 0.500000 s
Estimated background rate 1: 3664.092 near MET 638003642.080000 s
Estimated background rate 2: 3689.387 near MET 638003752.640000 s
Estimated total duration: 11.2 s (for data selection)
(from MET 638003650.560000 to MET 638003661.760000)
Estimated total fluence: 4675.508246 count
Created GTI with 3 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 87.874 70.119 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 87.874 70.119
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 21 7 217.325845 -44.098421
Obj: 2021 3 21 7 160.185352 27.815178
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2021 3 21 7 164.853665 -57.055691
Obj: 2021 3 21 7 156.612333 31.525865
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2021 3 21 7 155.564822 -53.776596
Obj: 2021 3 21 7 155.993576 35.081553
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2021 3 21 7 104.858592 -34.583296
Obj: 2021 3 21 7 164.767173 34.412160
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2021 3 21 7 100.013579 15.273285
Obj: 2021 3 21 7 185.457788 -12.093377
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2021 3 21 7 68.841914 28.318407
Obj: 2021 3 21 7 196.569299 50.148318
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2021 3 21 7 267.193283 -4.398699
Obj: 2021 3 21 7 179.027596 8.860554
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2021 3 21 7 308.894429 -47.520740
Obj: 2021 3 21 7 158.513013 -39.774427
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1037828/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:
Sun Mar 21 03:32:04 EDT 2021