TDRSS lightcurve for Trigger=687123
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 21 May 16 20:02:03 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 687123, Seg_Num: 0
GRB_RA: 293.750d {+19h 35m 00s} (J2000),
293.926d {+19h 35m 42s} (current),
293.212d {+19h 32m 51s} (1950)
GRB_DEC: +21.911d {+21d 54' 39"} (J2000),
+21.948d {+21d 56' 51"} (current),
+21.800d {+21d 47' 59"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 377 [cnts] Image_Peak=45 [image_cnts]
TRIGGER_DUR: 0.064 [sec]
TRIGGER_INDEX: 10411 E_range: 15-50 keV
BKG_INTEN: 25773 [cnts]
BKG_TIME: 72095.69 SOD {20:01:35.69} UT
BKG_DUR: 8 [sec]
GRB_DATE: 17529 TJD; 142 DOY; 16/05/21
GRB_TIME: 72107.21 SOD {20:01:47.21} UT
GRB_PHI: -131.59 [deg]
GRB_THETA: 34.80 [deg]
SOLN_STATUS: 0x18D
RATE_SIGNIF: 14.28 [sigma]
IMAGE_SIGNIF: 6.93 [sigma]
MERIT_PARAMS: +0 +0 +124 -4 +1 -3 +0 +1 +37 +0
SUN_POSTN: 59.05d {+03h 56m 13s} +20.39d {+20d 23' 40"}
SUN_DIST: 111.72 [deg] Sun_angle= 8.3 [hr] (West of Sun)
MOON_POSTN: 239.53d {+15h 58m 07s} -15.66d {-15d 39' 45"}
MOON_DIST: 65.23 [deg]
MOON_ILLUM: 100 [%]
GAL_COORDS: 57.27, 0.81 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 300.64, 42.86 [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 matches a source in the on-board catalog: Num=10762=sgr1935p2154, delta=0.021 [deg].
COMMENTS: This matches a source in the ground catalog: sgr1935p2154, delta=0.021 [deg].
COMMENTS: This is not a GRB.
COMMENTS: Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.
COMMENTS: This trigger occurred at longitude,latitude = 65.94,-20.03 [deg].
COMMENTS: This AT will self-cancel at the end of the first orbit (ie I_signif<7.0 && Trig_dur<65msec).
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 21 May 16 20:18:41 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 687123, Seg_Num: 0
GRB_RA: 293.750d {+19h 35m 00s} (J2000),
293.926d {+19h 35m 42s} (current),
293.212d {+19h 32m 51s} (1950)
GRB_DEC: +21.911d {+21d 54' 39"} (J2000),
+21.948d {+21d 56' 51"} (current),
+21.800d {+21d 47' 59"} (1950)
GRB_DATE: 17529 TJD; 142 DOY; 16/05/21
GRB_TIME: 72107.34 SOD {20:01:47.34} UT
TRIGGER_INDEX: 10411
GRB_PHI: -131.59 [deg]
GRB_THETA: 34.80 [deg]
DELTA_TIME: -43.00 [sec]
TRIGGER_DUR: 0.064 [sec]
SOLN_STATUS: 0x18D
RATE_SIGNIF: 14.28 [sigma]
IMAGE_SIGNIF: 6.93 [sigma]
LC_URL: sw00687123000msb.lc
GCN template for BAT paragraph
Click here!
At 20:01:47 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 160521 ***A*** (trigger=687123). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 293.750, +21.911 which is
RA(J2000) = 19h 35m 00s
Dec(J2000) = +21d 54' 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 ~2128 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
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: 21.632 s +/- 2.688 s
Estimated T50 duration: 12.032 s +/- 5.57645 s
Estimated Peak Interval: MET 485553723.84000003 +/- 0.500000 s
Estimated background rate 1: 5467.687 near MET 485553711.424000 s
Estimated background rate 2: 5335.481 near MET 485553829.248000 s
Estimated total duration: 25.728 s (for data selection)
(from MET 485553723.648000 to MET 485553749.376000)
Estimated total fluence: 1605.896792 count
Created GTI with 4 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 293.750 21.911 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: 2016 5 21 20 76.289505 48.404570
Obj: 2016 5 21 20 167.987681 -28.150844
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2016 5 21 20 39.175539 75.882837
Obj: 2016 5 21 20 134.976895 -20.994236
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2016 5 21 20 14.273102 76.679547
Obj: 2016 5 21 20 131.011709 -16.169243
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2016 5 21 20 262.830537 57.054592
Obj: 2016 5 21 20 110.760443 7.247864
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2016 5 21 20 252.645548 -10.950998
Obj: 2016 5 21 20 143.714107 27.281125
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2016 5 21 20 243.604398 -1.860880
Obj: 2016 5 21 20 56.309018 69.928888
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2016 5 21 20 113.759984 -0.582381
Obj: 2016 5 21 20 227.448703 -21.667875
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2016 5 21 20 130.585950 20.503221
Obj: 2016 5 21 20 31.806556 -80.270163
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger687123/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 May 21 16:19:02 EDT 2016