TDRSS lightcurve for Trigger=821902
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 04 Apr 18 02:11:59 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 821902, Seg_Num: 0
GRB_RA: 53.384d {+03h 33m 32s} (J2000),
53.520d {+03h 34m 05s} (current),
53.012d {+03h 32m 03s} (1950)
GRB_DEC: -50.195d {-50d 11' 41"} (J2000),
-50.135d {-50d 08' 03"} (current),
-50.362d {-50d 21' 42"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 5995 [cnts] Image_Peak=464 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 155 E_range: 50-350 keV
BKG_INTEN: 27355 [cnts]
BKG_TIME: 7891.27 SOD {02:11:31.27} UT
BKG_DUR: 8 [sec]
GRB_DATE: 18212 TJD; 94 DOY; 18/04/04
GRB_TIME: 7904.07 SOD {02:11:44.07} UT
GRB_PHI: -147.22 [deg]
GRB_THETA: 25.14 [deg]
SOLN_STATUS: 0x20010103
RATE_SIGNIF: 39.33 [sigma]
IMAGE_SIGNIF: 14.59 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +3 +3 +0 +0 -41 +0
SUN_POSTN: 13.14d {+00h 52m 33s} +5.63d {+05d 37' 34"}
SUN_DIST: 65.75 [deg] Sun_angle= -2.7 [hr] (East of Sun)
MOON_POSTN: 236.45d {+15h 45m 48s} -14.86d {-14d 51' 20"}
MOON_DIST: 114.96 [deg]
MOON_ILLUM: 86 [%]
GAL_COORDS: 260.92,-51.57 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 23.48,-65.40 [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 position matches one of the nearby galaxy sources in the on-board catalog!
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This matches a source in the ground catalog: 2M033312-502451, delta=0.225 [deg].
COMMENTS: This is a GRB in nearby galaxy or it is noise.
COMMENTS: This trigger occurred at longitude,latitude = 176.20,13.13 [deg].
COMMENTS:
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 04 Apr 18 02:23:35 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 821902, Seg_Num: 0
GRB_RA: 53.384d {+03h 33m 32s} (J2000),
53.520d {+03h 34m 05s} (current),
53.012d {+03h 32m 03s} (1950)
GRB_DEC: -50.195d {-50d 11' 41"} (J2000),
-50.135d {-50d 08' 03"} (current),
-50.362d {-50d 21' 42"} (1950)
GRB_DATE: 18212 TJD; 94 DOY; 18/04/04
GRB_TIME: 7904.07 SOD {02:11:44.07} UT
TRIGGER_INDEX: 155
GRB_PHI: -147.22 [deg]
GRB_THETA: 25.14 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x103
RATE_SIGNIF: 39.33 [sigma]
IMAGE_SIGNIF: 14.59 [sigma]
LC_URL: sw00821902000msb.lc
GCN template for BAT paragraph
Click here!
At 02:11:44 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 180404 ***A*** (trigger=821902). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 53.384, -50.195 which is
RA(J2000) = 03h 33m 32s
Dec(J2000) = -50d 11' 41"
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 ~9195 counts/sec (15-350 keV), at ~9 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
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: 93.632 s +/- 2.90513 s
Estimated T50 duration: 36.096 s +/- 2.89772 s
Estimated Peak Interval: MET 544500732.54399991 +/- 0.500000 s
Estimated background rate 1: 6738.137 near MET 544500709.440000 s
Estimated background rate 2: 6684.814 near MET 544500884.096000 s
Estimated total duration: 139.392 s (for data selection)
(from MET 544500718.080000 to MET 544500857.472000)
Estimated total fluence: 219062.606877 count
Created GTI with 26 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 53.384 -50.195 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 4 4 2 123.673870 -27.041732
Obj: 2018 4 4 2 47.544065 -29.745925
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2018 4 4 2 98.920076 -3.704369
Obj: 2018 4 4 2 32.927949 -6.334580
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2018 4 4 2 95.719718 1.511487
Obj: 2018 4 4 2 30.224046 -5.110737
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2018 4 4 2 82.162224 36.364172
Obj: 2018 4 4 2 8.688402 19.074922
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2018 4 4 2 183.661374 53.003326
Obj: 2018 4 4 2 313.443100 53.282219
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2018 4 4 2 324.560256 56.344155
Obj: 2018 4 4 2 326.072497 -9.417369
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2018 4 4 2 198.596517 -54.091889
Obj: 2018 4 4 2 37.995566 -59.120057
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2018 4 4 2 66.764043 -43.277708
Obj: 2018 4 4 2 42.087625 18.440682
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger821902/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:
Tue Apr 3 22:24:23 EDT 2018