TDRSS lightcurve for Trigger=849018
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 21 Jul 18 11:07:10 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 849018, Seg_Num: 0
GRB_RA: 347.695d {+23h 10m 47s} (J2000),
347.931d {+23h 11m 43s} (current),
347.059d {+23h 08m 14s} (1950)
GRB_DEC: +4.880d {+04d 52' 47"} (J2000),
+4.981d {+04d 58' 50"} (current),
+4.608d {+04d 36' 29"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 3334 [cnts] Image_Peak=174 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 146 E_range: 25-100 keV
BKG_INTEN: 20057 [cnts]
BKG_TIME: 39994.70 SOD {11:06:34.70} UT
BKG_DUR: 8 [sec]
GRB_DATE: 18320 TJD; 202 DOY; 18/07/21
GRB_TIME: 40008.39 SOD {11:06:48.39} UT
GRB_PHI: -177.97 [deg]
GRB_THETA: 5.16 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 14.28 [sigma]
IMAGE_SIGNIF: 7.61 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +2 -2 +0 +0 +61 +0
SUN_POSTN: 120.78d {+08h 03m 07s} +20.43d {+20d 25' 37"}
SUN_DIST: 127.20 [deg] Sun_angle= 8.9 [hr] (West of Sun)
MOON_POSTN: 227.21d {+15h 08m 52s} -12.22d {-12d 13' 21"}
MOON_DIST: 121.04 [deg]
MOON_ILLUM: 67 [%]
GAL_COORDS: 81.90,-49.80 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 350.61, 9.35 [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 = 195.88,20.16 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sat 21 Jul 18 11:23:26 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 849018, Seg_Num: 0
GRB_RA: 347.695d {+23h 10m 47s} (J2000),
347.931d {+23h 11m 43s} (current),
347.059d {+23h 08m 14s} (1950)
GRB_DEC: +4.880d {+04d 52' 47"} (J2000),
+4.981d {+04d 58' 50"} (current),
+4.608d {+04d 36' 29"} (1950)
GRB_DATE: 18320 TJD; 202 DOY; 18/07/21
GRB_TIME: 40008.39 SOD {11:06:48.39} UT
TRIGGER_INDEX: 146
GRB_PHI: -177.97 [deg]
GRB_THETA: 5.16 [deg]
DELTA_TIME: 71.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 14.28 [sigma]
IMAGE_SIGNIF: 7.61 [sigma]
LC_URL: sw00849018000msb.lc
GCN template for BAT paragraph
Click here!
At 11:06:48 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 180721 ***A*** (trigger=849018). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 347.695, +4.880 which is
RA(J2000) = 23h 10m 47s
Dec(J2000) = +04d 52' 47"
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 ~1875 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: 47.36 s +/- 2.89772 s
Estimated T50 duration: 23.296 s +/- 17.2485 s
Estimated Peak Interval: MET 553864075.00799990 +/- 0.500000 s
Estimated background rate 1: 4850.465 near MET 553864017.792000 s
Estimated background rate 2: 4799.908 near MET 553864148.736000 s
Estimated total duration: 51.968 s (for data selection)
(from MET 553864029.184000 to MET 553864081.152000)
Estimated total fluence: 8327.892837 count
Created GTI with 6 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 347.695 4.880 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 7 21 11 251.522387 9.696135
Obj: 2018 7 21 11 56.052319 41.081275
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2018 7 21 11 230.904285 -17.939773
Obj: 2018 7 21 11 10.677681 62.892185
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2018 7 21 11 226.081731 -20.615365
Obj: 2018 7 21 11 357.643187 61.591177
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2018 7 21 11 190.653616 -49.103138
Obj: 2018 7 21 11 285.646295 48.585482
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2018 7 21 11 87.781762 -45.809911
Obj: 2018 7 21 11 268.418725 -7.050727
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2018 7 21 11 121.288061 -7.717110
Obj: 2018 7 21 11 253.115296 -14.885967
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2018 7 21 11 276.706641 57.223414
Obj: 2018 7 21 11 98.167775 -4.490173
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2018 7 21 11 251.295266 -8.628812
Obj: 2018 7 21 11 121.640286 34.489257
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger849018/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 Jul 21 07:23:42 EDT 2018