TDRSS lightcurve for Trigger=1101675
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 08 Apr 22 05:46:16 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1101675, Seg_Num: 0
GRB_RA: 202.402d {+13h 29m 36s} (J2000),
202.636d {+13h 30m 33s} (current),
201.875d {+13h 27m 30s} (1950)
GRB_DEC: +47.061d {+47d 03' 41"} (J2000),
+46.947d {+46d 56' 48"} (current),
+47.319d {+47d 19' 09"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 2353 [cnts] Image_Peak=198 [image_cnts]
TRIGGER_DUR: 0.512 [sec]
TRIGGER_INDEX: 124 E_range: 25-100 keV
BKG_INTEN: 20165 [cnts]
BKG_TIME: 20747.07 SOD {05:45:47.07} UT
BKG_DUR: 8 [sec]
GRB_DATE: 19677 TJD; 98 DOY; 22/04/08
GRB_TIME: 20764.22 SOD {05:46:04.22} UT
GRB_PHI: 146.94 [deg]
GRB_THETA: 37.10 [deg]
SOLN_STATUS: 0x2001010D
RATE_SIGNIF: 28.56 [sigma]
IMAGE_SIGNIF: 12.80 [sigma]
MERIT_PARAMS: +0 +0 +125 -1 +2 +2 +0 +0 +58 +0
SUN_POSTN: 16.96d {+01h 07m 50s} +7.21d {+07d 12' 22"}
SUN_DIST: 125.61 [deg] Sun_angle= 11.6 [hr] (West of Sun)
MOON_POSTN: 97.78d {+06h 31m 08s} +26.91d {+26d 54' 42"}
MOON_DIST: 79.94 [deg]
MOON_ILLUM: 40 [%]
GAL_COORDS: 104.82, 68.70 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 175.19, 50.80 [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 matches a source in the on-board catalog: Num=12104=NGC5194, delta=0.141 [deg].
COMMENTS: This matches a source in the ground catalog: NGC5194, delta=0.141 [deg].
COMMENTS: The position is inside the galaxy NGC5194 (of total mag=8.40 and dia=11.00 arcmin).
COMMENTS: There is a 0.03% probability that this would happen by chance coincidence.
COMMENTS: This is a GRB in nearby galaxy or it is noise.
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 08 Apr 22 06:04:30 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1101675, Seg_Num: 0
GRB_RA: 202.402d {+13h 29m 36s} (J2000),
202.636d {+13h 30m 33s} (current),
201.875d {+13h 27m 30s} (1950)
GRB_DEC: +47.061d {+47d 03' 41"} (J2000),
+46.947d {+46d 56' 48"} (current),
+47.319d {+47d 19' 09"} (1950)
GRB_DATE: 19677 TJD; 98 DOY; 22/04/08
GRB_TIME: 20764.22 SOD {05:46:04.22} UT
TRIGGER_INDEX: 124
GRB_PHI: 146.94 [deg]
GRB_THETA: 37.10 [deg]
DELTA_TIME: 44.00 [sec]
TRIGGER_DUR: 0.512 [sec]
SOLN_STATUS: 0x10D
RATE_SIGNIF: 28.56 [sigma]
IMAGE_SIGNIF: 12.80 [sigma]
LC_URL: sw01101675000msb.lc
GCN template for BAT paragraph
Click here!
At 05:46:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220408 ***A*** (trigger=1101675). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 202.402, +47.061 which is
RA(J2000) = 13h 29m 36s
Dec(J2000) = +47d 03' 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 ~3854 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: 0.768 s +/- 0.128 s
Estimated T50 duration: 0.256 s +/- 0.128 s
Estimated Peak Interval: MET 671089596.28799987 +/- 0.500000 s
Estimated background rate 1: 5057.552 near MET 671089581.120000 s
Estimated background rate 2: 4614.886 near MET 671089750.848000 s
Estimated total duration: 129.536 s (for data selection)
(from MET 671089592.640000 to MET 671089722.176000)
Estimated total fluence: 1097.233348 count
Created GTI with 13 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 202.402 47.061 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 202.402 47.061
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: 2022 4 8 6 196.414270 -42.455927
Obj: 2022 4 8 6 151.367073 80.754453
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2022 4 8 6 147.968003 -45.874186
Obj: 2022 4 8 6 226.084865 64.006857
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2022 4 8 6 141.719626 -41.607386
Obj: 2022 4 8 6 231.723279 61.288447
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2022 4 8 6 105.526869 -19.321190
Obj: 2022 4 8 6 226.514440 26.403130
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2022 4 8 6 114.269332 22.483524
Obj: 2022 4 8 6 232.962865 -47.354192
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2022 4 8 6 64.285889 43.154601
Obj: 2022 4 8 6 203.563833 -2.555792
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2022 4 8 6 254.270407 -12.790951
Obj: 2022 4 8 6 129.075477 36.838395
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2022 4 8 6 320.151858 -61.372041
Obj: 2022 4 8 6 171.403084 11.879184
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1101675/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:
Fri Apr 8 02:05:51 EDT 2022