TDRSS lightcurve for Trigger=1071488
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 01 Sep 21 15:05:56 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1071488, Seg_Num: 0
GRB_RA: 295.292d {+19h 41m 10s} (J2000),
296.037d {+19h 44m 09s} (current),
293.554d {+19h 34m 13s} (1950)
GRB_DEC: -76.932d {-76d 55' 55"} (J2000),
-76.880d {-76d 52' 46"} (current),
-77.047d {-77d 02' 49"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=1136 [image_cnts]
TRIGGER_DUR: 64.000 [sec]
TRIGGER_INDEX: 20000 E_range: 15-50 keV
BKG_INTEN: 0 [cnts]
BKG_TIME: 0.00 SOD {00:00:00.00} UT
BKG_DUR: 0 [sec]
GRB_DATE: 19458 TJD; 244 DOY; 21/09/01
GRB_TIME: 54276.34 SOD {15:04:36.34} UT
GRB_PHI: -44.64 [deg]
GRB_THETA: 47.22 [deg]
SOLN_STATUS: 0x13
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 10.87 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 +0 +0 +0 +29 +0
SUN_POSTN: 160.97d {+10h 43m 53s} +8.04d {+08d 02' 39"}
SUN_DIST: 107.18 [deg] Sun_angle= -9.0 [hr] (East of Sun)
MOON_POSTN: 95.30d {+06h 21m 13s} +25.76d {+25d 45' 22"}
MOON_DIST: 127.91 [deg]
MOON_ILLUM: 29 [%]
GAL_COORDS: 317.58,-29.18 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 279.54,-54.33 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This is an image trigger. (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)
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 = 204.94,-17.55 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 01 Sep 21 15:24:23 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1071488, Seg_Num: 0
GRB_RA: 295.292d {+19h 41m 10s} (J2000),
296.037d {+19h 44m 09s} (current),
293.554d {+19h 34m 13s} (1950)
GRB_DEC: -76.932d {-76d 55' 55"} (J2000),
-76.880d {-76d 52' 46"} (current),
-77.047d {-77d 02' 49"} (1950)
GRB_DATE: 19458 TJD; 244 DOY; 21/09/01
GRB_TIME: 54276.34 SOD {15:04:36.34} UT
TRIGGER_INDEX: 20000
GRB_PHI: -44.64 [deg]
GRB_THETA: 47.22 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x13
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 10.87 [sigma]
LC_URL: sw01071488000msb.lc
GCN template for BAT paragraph
Click here!
At 15:04:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210901 ***A*** (trigger=1071488). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 295.292, -76.932 which is
RA(J2000) = 19h 41m 10s
Dec(J2000) = -76d 55' 55"
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 ~1179 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: 33.792 s +/- 2.98545 s
Estimated T50 duration: 22.528 s +/- 2.98545 s
Estimated Peak Interval: MET 652201564.99199998 +/- 0.500000 s
Estimated background rate 1: 4295.234 near MET 652201505.600000 s
Estimated background rate 2: 4332.446 near MET 652201628.480000 s
Estimated total duration: 35.84 s (for data selection)
(from MET 652201531.200000 to MET 652201567.040000)
Estimated total fluence: 5285.426284 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 295.292 -76.932 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 295.292 -76.932
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 9 1 15 308.245281 47.545076
Obj: 2021 9 1 15 355.420350 -51.752442
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2021 9 1 15 275.635183 24.263190
Obj: 2021 9 1 15 6.587635 -43.765671
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2021 9 1 15 272.927870 19.106729
Obj: 2021 9 1 15 8.455724 -44.757217
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2021 9 1 15 254.772793 -16.614436
Obj: 2021 9 1 15 13.190527 -24.698198
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2021 9 1 15 328.523490 -63.543627
Obj: 2021 9 1 15 14.101260 37.345266
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2021 9 1 15 175.574160 -47.479146
Obj: 2021 9 1 15 9.574783 -24.294496
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2021 9 1 15 55.692772 57.460918
Obj: 2021 9 1 15 345.272197 -32.127390
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2021 9 1 15 217.805653 43.953371
Obj: 2021 9 1 15 355.664737 17.788428
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1071488/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:
Wed Sep 1 11:24:44 EDT 2021