TDRSS lightcurve for Trigger=853824
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 18 Aug 18 03:12:36 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 853824, Seg_Num: 0
GRB_RA: 169.611d {+11h 18m 27s} (J2000),
169.829d {+11h 19m 19s} (current),
169.028d {+11h 16m 07s} (1950)
GRB_DEC: -48.344d {-48d 20' 39"} (J2000),
-48.446d {-48d 26' 46"} (current),
-48.071d {-48d 04' 14"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 6152 [cnts] Image_Peak=198 [image_cnts]
TRIGGER_DUR: 2.048 [sec]
TRIGGER_INDEX: 253 E_range: 15-50 keV
BKG_INTEN: 64122 [cnts]
BKG_TIME: 11490.55 SOD {03:11:30.55} UT
BKG_DUR: 24 [sec]
GRB_DATE: 18348 TJD; 230 DOY; 18/08/18
GRB_TIME: 11524.02 SOD {03:12:04.02} UT
GRB_PHI: 80.52 [deg]
GRB_THETA: 15.90 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 8.30 [sigma]
IMAGE_SIGNIF: 7.09 [sigma]
MERIT_PARAMS: +1 +0 +0 +1 +1 -3 +0 +0 -43 +0
SUN_POSTN: 147.43d {+09h 49m 43s} +13.14d {+13d 08' 08"}
SUN_DIST: 64.71 [deg] Sun_angle= -1.5 [hr] (East of Sun)
MOON_POSTN: 232.05d {+15h 28m 12s} -13.64d {-13d 38' 19"}
MOON_DIST: 61.52 [deg]
MOON_ILLUM: 48 [%]
GAL_COORDS: 287.39, 11.70 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 195.98,-47.15 [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 = 160.57,11.80 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 18 Aug 18 03:31:08 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 853824, Seg_Num: 0
GRB_RA: 169.611d {+11h 18m 27s} (J2000),
169.829d {+11h 19m 19s} (current),
169.028d {+11h 16m 07s} (1950)
GRB_DEC: -48.344d {-48d 20' 39"} (J2000),
-48.446d {-48d 26' 46"} (current),
-48.071d {-48d 04' 14"} (1950)
GRB_DATE: 18348 TJD; 230 DOY; 18/08/18
GRB_TIME: 11524.02 SOD {03:12:04.02} UT
TRIGGER_INDEX: 253
GRB_PHI: 80.52 [deg]
GRB_THETA: 15.90 [deg]
DELTA_TIME: 12.00 [sec]
TRIGGER_DUR: 2.048 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 8.30 [sigma]
IMAGE_SIGNIF: 7.09 [sigma]
LC_URL: sw00853824000msb.lc
GCN template for BAT paragraph
Click here!
At 03:12:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 180818 ***A*** (trigger=853824). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 169.611, -48.344 which is
RA(J2000) = 11h 18m 27s
Dec(J2000) = -48d 20' 39"
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 ~1371 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: 104.96 s +/- 2.89772 s
Estimated T50 duration: 58.368 s +/- 22.816 s
Estimated Peak Interval: MET 556254802.49599993 +/- 0.500000 s
Estimated background rate 1: 4880.744 near MET 556254732.480000 s
Estimated background rate 2: 4950.722 near MET 556254892.608000 s
Estimated total duration: 110.336 s (for data selection)
(from MET 556254743.360000 to MET 556254853.696000)
Estimated total fluence: 8910.301213 count
Created GTI with 5 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 169.611 -48.344 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 8 18 3 142.119253 -29.301229
Obj: 2018 8 18 3 57.700188 -49.570793
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2018 8 18 3 113.471204 -11.539898
Obj: 2018 8 18 3 46.232372 -23.320960
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2018 8 18 3 110.200602 -6.238289
Obj: 2018 8 18 3 44.928324 -20.882052
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2018 8 18 3 95.711342 24.775896
Obj: 2018 8 18 3 28.841564 10.466695
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2018 8 18 3 162.862124 43.933754
Obj: 2018 8 18 3 339.344030 71.283031
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2018 8 18 3 349.257718 68.411932
Obj: 2018 8 18 3 342.783390 3.819648
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2018 8 18 3 214.121925 -41.355785
Obj: 2018 8 18 3 353.680047 -70.162682
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2018 8 18 3 61.867428 -59.396671
Obj: 2018 8 18 3 30.476573 0.477437
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger853824/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 Aug 17 23:31:22 EDT 2018