TDRSS lightcurve for Trigger=820347
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 31 Mar 18 04:15:49 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 820347, Seg_Num: 0
GRB_RA: 66.017d {+04h 24m 04s} (J2000),
66.273d {+04h 25m 06s} (current),
65.316d {+04h 21m 16s} (1950)
GRB_DEC: +13.398d {+13d 23' 52"} (J2000),
+13.439d {+13d 26' 20"} (current),
+13.283d {+13d 16' 59"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 31097 [cnts] Image_Peak=593 [image_cnts]
TRIGGER_DUR: 8.192 [sec]
TRIGGER_INDEX: 477 E_range: 25-100 keV
BKG_INTEN: 223013 [cnts]
BKG_TIME: 15203.29 SOD {04:13:23.29} UT
BKG_DUR: 64 [sec]
GRB_DATE: 18208 TJD; 90 DOY; 18/03/31
GRB_TIME: 15295.70 SOD {04:14:55.70} UT
GRB_PHI: -141.13 [deg]
GRB_THETA: 24.62 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 10.90 [sigma]
IMAGE_SIGNIF: 8.89 [sigma]
MERIT_PARAMS: +1 +0 +0 +3 +2 -1 +0 +0 -55 +0
SUN_POSTN: 9.57d {+00h 38m 16s} +4.12d {+04d 07' 14"}
SUN_DIST: 56.69 [deg] Sun_angle= -3.8 [hr] (East of Sun)
MOON_POSTN: 187.18d {+12h 28m 42s} +1.36d {+01d 21' 40"}
MOON_DIST: 119.60 [deg]
MOON_ILLUM: 100 [%]
GAL_COORDS: 181.69,-24.42 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 66.46, -8.10 [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 = 173.42,14.00 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 31 Mar 18 04:34:39 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 820347, Seg_Num: 0
GRB_RA: 66.017d {+04h 24m 04s} (J2000),
66.273d {+04h 25m 06s} (current),
65.316d {+04h 21m 16s} (1950)
GRB_DEC: +13.398d {+13d 23' 52"} (J2000),
+13.439d {+13d 26' 20"} (current),
+13.283d {+13d 16' 59"} (1950)
GRB_DATE: 18208 TJD; 90 DOY; 18/03/31
GRB_TIME: 15295.70 SOD {04:14:55.70} UT
TRIGGER_INDEX: 477
GRB_PHI: -141.13 [deg]
GRB_THETA: 24.62 [deg]
DELTA_TIME: 38.00 [sec]
TRIGGER_DUR: 8.192 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 10.90 [sigma]
IMAGE_SIGNIF: 8.89 [sigma]
LC_URL: sw00820347000msb.lc
GCN template for BAT paragraph
Click here!
At 04:14:55 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 180331 ***A*** (trigger=820347). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 66.017, +13.398 which is
RA(J2000) = 04h 24m 04s
Dec(J2000) = +13d 23' 52"
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 ~1503 counts/sec (15-350 keV), at ~7 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: 74.496 s +/- 2.89772 s
Estimated T50 duration: 30.592 s +/- 6.65877 s
Estimated Peak Interval: MET 544162594.17600000 +/- 0.500000 s
Estimated background rate 1: 6899.889 near MET 544162504.512000 s
Estimated background rate 2: 6734.344 near MET 544162653.568000 s
Estimated total duration: 88.192 s (for data selection)
(from MET 544162516.224000 to MET 544162604.416000)
Estimated total fluence: 15389.102499 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 66.017 13.398 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 3 31 4 154.141368 -43.658818
Obj: 2018 3 31 4 109.738740 -2.745822
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2018 3 31 4 115.691758 -28.685113
Obj: 2018 3 31 4 91.874189 23.155090
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2018 3 31 4 112.215613 -23.400272
Obj: 2018 3 31 4 87.847012 28.197661
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2018 3 31 4 91.513107 7.970524
Obj: 2018 3 31 4 79.806118 64.063261
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2018 3 31 4 138.517540 45.926395
Obj: 2018 3 31 4 216.587841 37.183110
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2018 3 31 4 20.860682 58.056990
Obj: 2018 3 31 4 285.323232 43.641815
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2018 3 31 4 236.598872 -39.069307
Obj: 2018 3 31 4 157.483399 -45.032872
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2018 3 31 4 26.767057 -61.248576
Obj: 2018 3 31 4 91.678359 -24.527905
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger820347/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:
Sat Mar 31 00:35:03 EDT 2018