TDRSS lightcurve for Trigger=1057131
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 21 Jun 21 17:05:41 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1057131, Seg_Num: 0
GRB_RA: 238.812d {+15h 55m 15s} (J2000),
239.228d {+15h 56m 55s} (current),
237.845d {+15h 51m 23s} (1950)
GRB_DEC: -54.063d {-54d 03' 45"} (J2000),
-54.124d {-54d 07' 27"} (current),
-53.917d {-53d 55' 00"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 112 [cnts] Image_Peak=25 [image_cnts]
TRIGGER_DUR: 0.008 [sec]
TRIGGER_INDEX: 10109 E_range: 15-50 keV
BKG_INTEN: 21886 [cnts]
BKG_TIME: 61460.76 SOD {17:04:20.76} UT
BKG_DUR: 8 [sec]
GRB_DATE: 19386 TJD; 172 DOY; 21/06/21
GRB_TIME: 61476.76 SOD {17:04:36.76} UT
GRB_PHI: 103.72 [deg]
GRB_THETA: 0.03 [deg]
SOLN_STATUS: 0x83
RATE_SIGNIF: 18.60 [sigma]
IMAGE_SIGNIF: 6.63 [sigma]
MERIT_PARAMS: +1 +0 +0 -7 +1 -4 +0 +1 +77 +0
SUN_POSTN: 90.59d {+06h 02m 22s} +23.43d {+23d 26' 05"}
SUN_DIST: 141.39 [deg] Sun_angle= -9.9 [hr] (East of Sun)
MOON_POSTN: 225.90d {+15h 03m 35s} -15.31d {-15d 18' 35"}
MOON_DIST: 40.19 [deg]
MOON_ILLUM: 87 [%]
GAL_COORDS: 327.88, -0.35 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 248.78,-32.90 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This Notice was delayed by more than 60 sec past the end of the trigger integration interval;
COMMENTS: probably due to it occurring during a Malindi downlink session.
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: Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Mon 21 Jun 21 17:13:06 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1057131, Seg_Num: 0
GRB_RA: 238.812d {+15h 55m 15s} (J2000),
239.228d {+15h 56m 55s} (current),
237.845d {+15h 51m 23s} (1950)
GRB_DEC: -54.063d {-54d 03' 45"} (J2000),
-54.124d {-54d 07' 27"} (current),
-53.917d {-53d 55' 00"} (1950)
GRB_DATE: 19386 TJD; 172 DOY; 21/06/21
GRB_TIME: 61476.95 SOD {17:04:36.95} UT
TRIGGER_INDEX: 10109
GRB_PHI: 103.72 [deg]
GRB_THETA: 0.03 [deg]
DELTA_TIME: -18.00 [sec]
TRIGGER_DUR: 0.008 [sec]
SOLN_STATUS: 0x83
RATE_SIGNIF: 18.60 [sigma]
IMAGE_SIGNIF: 6.63 [sigma]
LC_URL: sw01057131000msb.lc
GCN template for BAT paragraph
Click here!
At 17:04:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210621 ***A*** (trigger=1057131). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 238.812, -54.063 which is
RA(J2000) = 15h 55m 15s
Dec(J2000) = -54d 03' 45"
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 ~1234 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
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 background rate 1: 4838.548 near MET 645987984.960000 s
Estimated background rate 2: 4838.548 near MET 645987984.960000 s
Estimated total fluence: 0.000000 count
Created GTI with 1 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 238.812 -54.063 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 238.812 -54.063
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 6 21 17 350.292887 74.242889
Obj: 2021 6 21 17 317.532520 -65.542641
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2021 6 21 17 274.884023 56.452615
Obj: 2021 6 21 17 8.329921 -67.234700
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2021 6 21 17 273.441207 51.296819
Obj: 2021 6 21 17 17.895348 -67.714863
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2021 6 21 17 250.126848 15.237982
Obj: 2021 6 21 17 35.305845 -38.984841
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2021 6 21 17 270.724550 -51.207580
Obj: 2021 6 21 17 42.743480 33.679669
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2021 6 21 17 207.303978 -26.955499
Obj: 2021 6 21 17 30.423759 -11.599615
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2021 6 21 17 97.693839 39.727610
Obj: 2021 6 21 17 320.015719 -24.371388
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2021 6 21 17 176.544810 36.110595
Obj: 2021 6 21 17 340.660918 -0.496927
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1057131/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:
Mon Jun 21 13:14:04 EDT 2021