TDRSS lightcurve for Trigger=780845
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 20 Oct 17 23:08:09 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 780845, Seg_Num: 0
GRB_RA: 39.262d {+02h 37m 03s} (J2000),
39.508d {+02h 38m 02s} (current),
38.575d {+02h 34m 18s} (1950)
GRB_DEC: +15.186d {+15d 11' 10"} (J2000),
+15.263d {+15d 15' 45"} (current),
+14.969d {+14d 58' 10"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 32032 [cnts] Image_Peak=475 [image_cnts]
TRIGGER_DUR: 8.192 [sec]
TRIGGER_INDEX: 477 E_range: 25-100 keV
BKG_INTEN: 224131 [cnts]
BKG_TIME: 83140.12 SOD {23:05:40.12} UT
BKG_DUR: 64 [sec]
GRB_DATE: 18046 TJD; 293 DOY; 17/10/20
GRB_TIME: 83230.75 SOD {23:07:10.75} UT
GRB_PHI: 74.60 [deg]
GRB_THETA: 28.27 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 17.46 [sigma]
IMAGE_SIGNIF: 8.64 [sigma]
MERIT_PARAMS: +1 +0 +0 +3 +2 -1 +0 +0 +97 +0
SUN_POSTN: 205.77d {+13h 43m 04s} -10.67d {-10d 40' 17"}
SUN_DIST: 165.85 [deg] Sun_angle= 11.1 [hr] (West of Sun)
MOON_POSTN: 220.29d {+14h 41m 09s} -10.47d {-10d 28' 23"}
MOON_DIST: 175.15 [deg]
MOON_ILLUM: 1 [%]
GAL_COORDS: 157.31,-40.53 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 41.65, -0.15 [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 = 348.59,10.53 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 20 Oct 17 23:24:19 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 780845, Seg_Num: 0
GRB_RA: 39.262d {+02h 37m 03s} (J2000),
39.508d {+02h 38m 02s} (current),
38.575d {+02h 34m 18s} (1950)
GRB_DEC: +15.186d {+15d 11' 10"} (J2000),
+15.263d {+15d 15' 45"} (current),
+14.969d {+14d 58' 10"} (1950)
GRB_DATE: 18046 TJD; 293 DOY; 17/10/20
GRB_TIME: 83230.75 SOD {23:07:10.75} UT
TRIGGER_INDEX: 477
GRB_PHI: 74.60 [deg]
GRB_THETA: 28.27 [deg]
DELTA_TIME: 58.00 [sec]
TRIGGER_DUR: 8.192 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 17.46 [sigma]
IMAGE_SIGNIF: 8.64 [sigma]
LC_URL: sw00780845000msb.lc
GCN template for BAT paragraph
Click here!
At 23:07:10 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 171020 ***A*** (trigger=780845). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 39.262, +15.186 which is
RA(J2000) = 02h 37m 03s
Dec(J2000) = +15d 11' 10"
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 ~2482 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: 83.712 s +/- 2.89772 s
Estimated T50 duration: 48.128 s +/- 2.90196 s
Estimated Peak Interval: MET 530233703.99999994 +/- 0.500000 s
Estimated background rate 1: 6950.833 near MET 530233629.600000 s
Estimated background rate 2: 6072.591 near MET 530233800.256000 s
Estimated total duration: 131.392 s (for data selection)
(from MET 530233632.000000 to MET 530233763.392000)
Estimated total fluence: 39470.966467 count
Created GTI with 23 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 39.262 15.186 0.083
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: 2017 10 20 23 82.559236 -7.848846
Obj: 2017 10 20 23 250.498009 0.311107
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2017 10 20 23 62.274999 20.611258
Obj: 2017 10 20 23 228.473606 -27.107083
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2017 10 20 23 57.416090 24.139570
Obj: 2017 10 20 23 222.711860 -29.547113
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2017 10 20 23 23.666926 56.942424
Obj: 2017 10 20 23 178.531133 -54.912385
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2017 10 20 23 251.904748 45.567384
Obj: 2017 10 20 23 86.244763 -36.444935
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2017 10 20 23 297.368969 18.042997
Obj: 2017 10 20 23 112.227957 -4.885516
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2017 10 20 23 117.176286 -57.011259
Obj: 2017 10 20 23 279.187033 47.898432
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2017 10 20 23 77.089935 -0.893340
Obj: 2017 10 20 23 259.774102 -13.077151
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger780845/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:
Fri Oct 20 19:25:04 EDT 2017