TDRSS lightcurve for Trigger=748947
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 19 Apr 17 21:47:50 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 748947, Seg_Num: 0
GRB_RA: 60.498d {+04h 01m 59s} (J2000),
60.697d {+04h 02m 47s} (current),
59.923d {+03h 59m 42s} (1950)
GRB_DEC: -15.143d {-15d 08' 32"} (J2000),
-15.095d {-15d 05' 42"} (current),
-15.281d {-15d 16' 50"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 4147 [cnts] Image_Peak=206 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 148 E_range: 25-100 keV
BKG_INTEN: 25172 [cnts]
BKG_TIME: 77613.06 SOD {21:33:33.06} UT
BKG_DUR: 8 [sec]
GRB_DATE: 17862 TJD; 109 DOY; 17/04/19
GRB_TIME: 77626.05 SOD {21:33:46.05} UT
GRB_PHI: -38.57 [deg]
GRB_THETA: 35.16 [deg]
SOLN_STATUS: 0x20000003
RATE_SIGNIF: 15.62 [sigma]
IMAGE_SIGNIF: 9.51 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 +0 -100 +0 -74 +0
SUN_POSTN: 27.93d {+01h 51m 44s} +11.48d {+11d 28' 43"}
SUN_DIST: 41.94 [deg] Sun_angle= -2.2 [hr] (East of Sun)
MOON_POSTN: 307.25d {+20h 28m 59s} -16.76d {-16d 45' 45"}
MOON_DIST: 107.02 [deg]
MOON_ILLUM: 45 [%]
GAL_COORDS: 207.80,-44.26 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 54.52,-35.02 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This Notice was delayed by more than 60 sec past the end of the trigger integration interval;
COMMENTS: probably due to it occurring during a Malindi downlink session.
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 = 259.39,-19.26 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 19 Apr 17 21:50:26 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 748947, Seg_Num: 0
GRB_RA: 60.498d {+04h 01m 59s} (J2000),
60.697d {+04h 02m 47s} (current),
59.923d {+03h 59m 42s} (1950)
GRB_DEC: -15.143d {-15d 08' 32"} (J2000),
-15.095d {-15d 05' 42"} (current),
-15.281d {-15d 16' 50"} (1950)
GRB_DATE: 17862 TJD; 109 DOY; 17/04/19
GRB_TIME: 77626.05 SOD {21:33:46.05} UT
TRIGGER_INDEX: 148
GRB_PHI: -38.57 [deg]
GRB_THETA: 35.16 [deg]
DELTA_TIME: -18.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 15.62 [sigma]
IMAGE_SIGNIF: 9.51 [sigma]
LC_URL: sw00748947000msb.lc
GCN template for BAT paragraph
Click here!
At 21:33:46 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 170419 ***A*** (trigger=748947). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 60.498, -15.143 which is
RA(J2000) = 04h 01m 59s
Dec(J2000) = -15d 08' 32"
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 ~16386 counts/sec (15-350 keV), at ~183 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
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: 177.536 s +/- 43.7109 s
Estimated T50 duration: 177.536 s +/- 89.84 s
Estimated Peak Interval: MET 514330447.74399996 +/- 0.500000 s
Estimated background rate 1: 6266.906 near MET 514330432.896000 s
Estimated background rate 2: 21934.204 near MET 514330626.624000 s
Estimated total duration: 177.536 s (for data selection)
(from MET 514330444.992000 to MET 514330622.528000)
Estimated total fluence: -594293.522964 count
Created GTI with 36 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 60.498 -15.143 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 4 19 22 88.356009 20.431993
Obj: 2017 4 19 22 43.003602 24.162613
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2017 4 19 22 69.389919 48.901755
Obj: 2017 4 19 22 8.068290 42.824397
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2017 4 19 22 61.736508 52.811938
Obj: 2017 4 19 22 0.173457 41.523693
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2017 4 19 22 325.793724 80.000475
Obj: 2017 4 19 22 309.862526 38.488112
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2017 4 19 22 244.173988 17.439293
Obj: 2017 4 19 22 284.936184 4.475459
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2017 4 19 22 267.173312 16.431225
Obj: 2017 4 19 22 271.482622 -25.295279
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2017 4 19 22 123.839439 -28.562060
Obj: 2017 4 19 22 80.780942 -15.070290
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2017 4 19 22 105.595522 3.639622
Obj: 2017 4 19 22 99.307914 45.225902
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger748947/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:
Wed Apr 19 18:15:57 EDT 2017