batgrbproduct analysis for trigger=1105561
batgrbproduct Analysis for Trigger=1105561
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.48
Process Start Time (local time): Sat May 7 12:55:22 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1105561/GCN5_download_cron
======================================================================
Trigger: 01105561 Segment: 000
BAT Trigger Time: 673532176 [s; MET]
Trigger Stop: 673532240 [s; MET]
UTC: 2022-05-06T12:15:46.910340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 300.05406523391 Dec: 34.8744103329766 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 16.34
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.34
Flight Position: [ source = BAT ]
RA: 300.05406523391 Dec: 34.8744103329766 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.966675439311 Dec: 34.9933604150983 [deg; J2000]
{ 19h 59m 52.0s , +34d 59' 36.1" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 1.00614853768677 [arcmin] (formal 1-sigma fit error)
SNR: -11.886842884959
Angular difference between Flight and Ground position is 8.331553 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 579.963999986649 +/- 462.233231236247
Measured from: -0.0439999103546143
to: 579.920000076294 [s; relative to TRIGTIME]
T50: 200.243999958038 +/- 592.26011081672
Measured from: 31.1120001077652
to: 231.356000065804 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 602.228000044823
to: 603.228000044823 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.7960000038147
to: 784.228000044823 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.957733 12.109781 7.561172 1.127444
0.185140 0.189509 0.164429 0.144464 [error]
Peak 0.032200 0.040393 0.023242 0.002676
0.006736 0.007039 0.006210 0.005470 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 3.08e-06 4.81e-06 5.66e-06 1.29e-05 1.73e-05 2.65e-05 erg/cm2
Error 1.37e-07 1.22e-07 1.74e-07 8.94e-07 4.13e-07 9.96e-07 erg/cm2
Peak flux Power-law 3.10e-01 2.68e-01 1.58e-01 1.40e-01 7.97e-01 8.77e-01 ph/cm2/s
Error 8.60e-02 5.25e-02 4.70e-02 7.94e-02 1.56e-01 1.78e-01 ph/cm2/s
Fluence Cutoff-PL 2.79e-06 4.94e-06 5.78e-06 7.15e-06 1.67e-05 2.07e-05 erg/cm2
Error 1.79e-07 1.36e-07 1.88e-07 1.72e-06 4.97e-07 1.80e-06 erg/cm2
Peak flux Cutoff-PL 2.81e-01 3.08e-01 1.56e-01 3.54e-02 7.73e-01 7.80e-01 ph/cm2/s
Error 9.75e-02 7.66e-02 5.93e-02 9.73e-02 1.58e-01 1.87e-01 ph/cm2/s
Fluence Band 2.70e-06 4.97e-06 5.68e-06 9.94e-06 1.67e-05 2.33e-05 erg/cm2
Error 2.02e-07 1.54e-07 2.17e-07 -------- 4.86e-07 -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.765 0.045 - - 2.41e-03 5.62e-05 69.450 57
CPL 1.316 0.200 78.4 15.9 3.95e-03 8.65e-04 53.350 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.760 0.337 - - 5.88e-03 1.36e-03 74.540 57
CPL 0.625 1.859 50.5 -19.6 2.68e-02 2.90e-01 72.920 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 787.024 -2.796 784.228
T90 579.964 -0.044 579.920
T50 200.244 31.112 231.356
Peak 1.000 602.228 603.228
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.9667 +34.9934 0.0161 0.1 164.0 -8.5262 -11.9 TRIG_01105561
------------------------------------------
Foreground time interval of the image:
-2.796 52.720 (delta_t = 55.516 [sec])
54.000 512.080 (delta_t = 458.080 [sec])
513.000 564.410 (delta_t = 51.410 [sec])
566.000 665.720 (delta_t = 99.720 [sec])
667.000 715.808 (delta_t = 48.808 [sec])
717.000 730.560 (delta_t = 13.560 [sec])
732.000 784.228 (delta_t = 52.228 [sec])
Background time interval of the image:
-239.000 -2.796 (delta_t = 236.204 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-2.796000 52.720000
54.000000 512.080000
513.000000 564.410000
566.000000 665.720000
667.000000 715.807500
717.000000 730.560000
732.000000 784.228000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76545 ( -0.0451399 0.0453088 )
Norm@50keV : 2.41110E-03 ( -5.62371e-05 5.61903e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.45 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 57 degrees of freedom
# Null hypothesis probability = 1.247378e-01
Photon flux (15-150 keV) in 779.3 sec: 0.327899 ( -0.00853368 0.0085678 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73236e-05 ( -4.12952e-07 4.13491e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-2.796000 52.720000
54.000000 512.080000
513.000000 564.410000
566.000000 665.720000
667.000000 715.807500
717.000000 730.560000
732.000000 784.228000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31608 ( -0.204717 0.195848 )
Epeak [keV] : 78.4452 ( -10.0566 21.6788 )
Norm@50keV : 3.95489E-03 ( -0.000751482 0.000978985 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.35 using 59 PHA bins.
# Reduced chi-squared = 0.9528 for 56 degrees of freedom
# Null hypothesis probability = 5.756370e-01
Photon flux (15-150 keV) in 779.3 sec: 0.315263 ( -0.009878 0.009942 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66739e-05 ( -4.97193e-07 4.9618e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-2.796000 52.720000
54.000000 512.080000
513.000000 564.410000
566.000000 665.720000
667.000000 715.807500
717.000000 730.560000
732.000000 784.228000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.14515 ( -0.313159 0.574469 )
beta : -2.04257 ( 2.04236 0.166389 )
Epeak [keV] : 65.6639 ( -18.1076 26.01 )
Norm@50keV : 4.94208E-03 ( -0.00154834 0.00614566 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.05 using 59 PHA bins.
# Reduced chi-squared = 0.9464 for 55 degrees of freedom
# Null hypothesis probability = 5.879441e-01
Photon flux (15-150 keV) in 779.3 sec: 0.313253 ( 6.68675 -0.010365 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66698e-05 ( -1.66643e-05 -4.86595e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9849 ( )
R^2/D10^2 : 4.25904E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 359.83 using 59 PHA bins.
# Reduced chi-squared = 6.3129 for 57 degrees of freedom
# Null hypothesis probability = 1.550533e-45
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.371e-06 6.195e-08
25- 50 5.095e-06 1.481e-07
50-150 6.558e-06 3.109e-07
15-150 1.302e-05 3.156e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 120.783 (-10.8448 15.0828)
Norm : 1.36689 (-0.0495931 0.0466508)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.705e-06 1.414e-07
25- 50 4.889e-06 2.089e-07
50-150 8.979e-06 1.935e-06
15-150 1.657e-05 2.053e-06
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.38766 (-0.7594 0.782679)
R1^2/D10^2 : 0.285433 (-0.0791758 0.127759)
kT2 [keV] : 23.8409 (-2.33141 3.13098)
R2^2/D10^2 : 4.43620E-03 (-0.00171014 0.00231237)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.405e-06 2.011e-07
25- 50 5.054e-06 3.082e-07
50-150 8.828e-06 7.037e-07
15-150 1.629e-05 8.144e-07
Peak spectrum fit
Power-law model
Time interval is from 602.228 sec. to 603.228 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75978 ( -0.324404 0.349479 )
Norm@50keV : 5.87569E-03 ( -0.00137711 0.00133434 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.54 using 59 PHA bins.
# Reduced chi-squared = 1.308 for 57 degrees of freedom
# Null hypothesis probability = 5.934122e-02
Photon flux (15-150 keV) in 1 sec: 0.797375 ( -0.156021 0.156022 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.41885e-08 ( -1.27246e-08 1.31994e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 602.228 sec. to 603.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.624751 ( -2.24464 1.47324 )
Epeak [keV] : 50.5198 ( -11.2515 -50.5187 )
Norm@50keV : 2.67991E-02 ( -0.0268028 0.553446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.92 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 56 degrees of freedom
# Null hypothesis probability = 6.393998e-02
Photon flux (15-150 keV) in 1 sec: 0.772945 ( -0.157208 0.15833 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.84458e-08 ( -1.31025e-08 1.5104e-08 ) ergs/cm2
Band function
Time interval is from 602.228 sec. to 603.228 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.06532E-02 ( -0.818932 -0.818932 )
beta : -2.50145 ( 2.2468 0.679934 )
Epeak [keV] : 43.8303 ( -36.72 24.2079 )
Norm@50keV : 5.98334E-02 ( -0.0585456 192.04 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.74 using 59 PHA bins.
# Reduced chi-squared = 1.323 for 55 degrees of freedom
# Null hypothesis probability = 5.483184e-02
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98692e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.9547 (-2.15368 2.75685)
R^2/D10^2 : 0.281095 (-0.159158 0.347328)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.042e-09 2.859e-09
25- 50 1.981e-08 6.514e-09
50-150 1.338e-08 6.666e-09
15-150 4.024e-08 1.254e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 96.4961 (-45.9858 -96.4961)
Norm : 3.60299 (-0.7831 1.15483)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.415e-09 2.725e-09
25- 50 1.616e-08 6.976e-09
50-150 2.566e-08 1.855e-08
15-150 5.124e-08 2.708e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.26359 (-7.35114 4.6803)
R1^2/D10^2 : 0.819827 (-0.788496 -0.788496)
kT2 [keV] : 19.7808 (-20.5754 71.4586)
R2^2/D10^2 : 1.86577E-02 (-0.0157461 0.29996)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.622e-09 5.095e-09
25- 50 1.758e-08 1.022e-08
50-150 2.224e-08 1.343e-08
15-150 4.845e-08 2.527e-08
Plot creation:
Sat May 7 12:58:22 EDT 2022