TDRSS lightcurve for Trigger=868984
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 27 Oct 18 01:49:59 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 868984, Seg_Num: 0
GRB_RA: 225.383d {+15h 01m 32s} (J2000),
225.579d {+15h 02m 19s} (current),
224.861d {+14h 59m 27s} (1950)
GRB_DEC: +30.891d {+30d 53' 28"} (J2000),
+30.818d {+30d 49' 04"} (current),
+31.088d {+31d 05' 15"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 17622 [cnts] Image_Peak=399 [image_cnts]
TRIGGER_DUR: 8.192 [sec]
TRIGGER_INDEX: 477 E_range: 25-100 keV
BKG_INTEN: 123053 [cnts]
BKG_TIME: 6450.18 SOD {01:47:30.18} UT
BKG_DUR: 64 [sec]
GRB_DATE: 18418 TJD; 300 DOY; 18/10/27
GRB_TIME: 6539.39 SOD {01:48:59.39} UT
GRB_PHI: -12.77 [deg]
GRB_THETA: 23.49 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 6.63 [sigma]
IMAGE_SIGNIF: 7.88 [sigma]
MERIT_PARAMS: +1 +0 +0 +3 +2 -2 -100 +0 -69 +0
SUN_POSTN: 211.36d {+14h 05m 27s} -12.71d {-12d 42' 46"}
SUN_DIST: 45.63 [deg] Sun_angle= -0.9 [hr] (East of Sun)
MOON_POSTN: 62.30d {+04h 09m 11s} +16.65d {+16d 38' 51"}
MOON_DIST: 129.89 [deg]
MOON_ILLUM: 93 [%]
GAL_COORDS: 48.32, 61.41 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 210.58, 45.56 [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 = 172.84,-8.49 [deg].
COMMENTS:
COMMENTS: NOTE: This BAT event is temporally(48.0<100sec) coincident with the FERMI_GBM event (trignum=562297792).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 27 Oct 18 02:06:36 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 868984, Seg_Num: 0
GRB_RA: 225.383d {+15h 01m 32s} (J2000),
225.579d {+15h 02m 19s} (current),
224.861d {+14h 59m 27s} (1950)
GRB_DEC: +30.891d {+30d 53' 28"} (J2000),
+30.818d {+30d 49' 04"} (current),
+31.088d {+31d 05' 15"} (1950)
GRB_DATE: 18418 TJD; 300 DOY; 18/10/27
GRB_TIME: 6539.39 SOD {01:48:59.39} UT
TRIGGER_INDEX: 477
GRB_PHI: -12.77 [deg]
GRB_THETA: 23.49 [deg]
DELTA_TIME: 38.00 [sec]
TRIGGER_DUR: 8.192 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 6.63 [sigma]
IMAGE_SIGNIF: 7.88 [sigma]
LC_URL: sw00868984000msb.lc
GCN template for BAT paragraph
Click here!
At 01:48:59 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 181027 ***A*** (trigger=868984). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 225.383, +30.891 which is
RA(J2000) = 15h 01m 32s
Dec(J2000) = +30d 53' 28"
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 ~1221 counts/sec (15-350 keV), at ~49 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: 57.472 s +/- 4.25492 s
Estimated T50 duration: 18.432 s +/- 2.98545 s
Estimated Peak Interval: MET 562297810.30399990 +/- 0.500000 s
Estimated background rate 1: 4018.466 near MET 562297748.864000 s
Estimated background rate 2: 3874.906 near MET 562297894.272000 s
Estimated total duration: 80.896 s (for data selection)
(from MET 562297760.128000 to MET 562297841.024000)
Estimated total fluence: 24851.639522 count
Created GTI with 8 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 225.383 30.891 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: 2018 10 27 2 112.341591 -43.637721
Obj: 2018 10 27 2 133.506488 -2.071381
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2018 10 27 2 85.479125 -17.333819
Obj: 2018 10 27 2 116.263653 16.767376
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2018 10 27 2 82.836811 -12.484890
Obj: 2018 10 27 2 113.256873 22.046883
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2018 10 27 2 65.211993 24.215602
Obj: 2018 10 27 2 114.549610 49.125468
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2018 10 27 2 172.095223 71.271618
Obj: 2018 10 27 2 191.183290 26.893429
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2018 10 27 2 341.740464 40.998658
Obj: 2018 10 27 2 270.678694 66.013182
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2018 10 27 2 225.467614 -68.361263
Obj: 2018 10 27 2 181.427933 -30.445436
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2018 10 27 2 45.588771 -33.883329
Obj: 2018 10 27 2 104.412640 -45.954835
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger868984/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 26 22:07:04 EDT 2018