TDRSS lightcurve for Trigger=971846
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Tue 12 May 20 20:33:58 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 971846, Seg_Num: 0
GRB_RA: 7.396d {+00h 29m 35s} (J2000),
7.656d {+00h 30m 37s} (current),
6.757d {+00h 27m 02s} (1950)
GRB_DEC: -2.199d {-02d 11' 54"} (J2000),
-2.086d {-02d 05' 10"} (current),
-2.475d {-02d 28' 29"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 13723 [cnts] Image_Peak=339 [image_cnts]
TRIGGER_DUR: 4.096 [sec]
TRIGGER_INDEX: 298 E_range: 25-100 keV
BKG_INTEN: 118124 [cnts]
BKG_TIME: 73935.07 SOD {20:32:15.07} UT
BKG_DUR: 40 [sec]
GRB_DATE: 18981 TJD; 133 DOY; 20/05/12
GRB_TIME: 73995.93 SOD {20:33:15.93} UT
GRB_PHI: -120.54 [deg]
GRB_THETA: 5.53 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 8.60 [sigma]
IMAGE_SIGNIF: 7.66 [sigma]
MERIT_PARAMS: +1 +0 +0 +2 +2 -2 +0 +0 -68 +0
SUN_POSTN: 50.16d {+03h 20m 38s} +18.41d {+18d 24' 35"}
SUN_DIST: 46.56 [deg] Sun_angle= 2.8 [hr] (West of Sun)
MOON_POSTN: 305.69d {+20h 22m 45s} -22.28d {-22d 16' 49"}
MOON_DIST: 63.36 [deg]
MOON_ILLUM: 67 [%]
GAL_COORDS: 110.15,-64.53 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 5.92, -4.95 [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 = 213.96,17.94 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Tue 12 May 20 20:56:50 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 971846, Seg_Num: 0
GRB_RA: 7.396d {+00h 29m 35s} (J2000),
7.656d {+00h 30m 37s} (current),
6.757d {+00h 27m 02s} (1950)
GRB_DEC: -2.199d {-02d 11' 54"} (J2000),
-2.086d {-02d 05' 10"} (current),
-2.475d {-02d 28' 29"} (1950)
GRB_DATE: 18981 TJD; 133 DOY; 20/05/12
GRB_TIME: 73995.93 SOD {20:33:15.93} UT
TRIGGER_INDEX: 298
GRB_PHI: -120.54 [deg]
GRB_THETA: 5.53 [deg]
DELTA_TIME: -5.00 [sec]
TRIGGER_DUR: 4.096 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 8.60 [sigma]
IMAGE_SIGNIF: 7.66 [sigma]
LC_URL: sw00971846000msb.lc
GCN template for BAT paragraph
Click here!
At 20:33:15 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200512 ***A*** (trigger=971846). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 7.396, -2.199 which is
RA(J2000) = 00h 29m 35s
Dec(J2000) = -02d 11' 54"
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 ~1403 counts/sec (15-350 keV), at ~3 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: 47.36 s +/- 2.89772 s
Estimated T50 duration: 22.016 s +/- 2.06394 s
Estimated Peak Interval: MET 611008424.00000000 +/- 0.500000 s
Estimated background rate 1: 5827.036 near MET 611008407.360000 s
Estimated background rate 2: 5831.718 near MET 611008541.184000 s
Estimated total duration: 57.728 s (for data selection)
(from MET 611008417.920000 to MET 611008475.648000)
Estimated total fluence: 14616.614918 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 7.396 -2.199 0.083
No match
Search for this GRB position to the source locations in BAT transient monitor (search radius within 12 arcmin)
python compare_catalog.py 7.396 -2.199
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: 2020 5 12 20 73.993697 47.143874
Obj: 2020 5 12 20 85.869394 1.742518
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2020 5 12 20 35.200173 74.174188
Obj: 2020 5 12 20 65.796659 30.248853
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2020 5 12 20 12.877918 74.716839
Obj: 2020 5 12 20 60.203772 33.991301
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2020 5 12 20 266.474073 56.890222
Obj: 2020 5 12 20 19.234358 66.881726
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2020 5 12 20 254.367686 -9.904037
Obj: 2020 5 12 20 246.966960 36.125911
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2020 5 12 20 245.219683 -3.027510
Obj: 2020 5 12 20 286.748435 19.382348
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2020 5 12 20 112.092602 -1.671625
Obj: 2020 5 12 20 122.279609 -47.359786
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2020 5 12 20 129.031043 21.869084
Obj: 2020 5 12 20 87.231509 -0.634861
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger971846/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 May 12 16:57:25 EDT 2020