batgrbproduct analysis for trigger=1159108
batgrbproduct Analysis for Trigger=1159108
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): Fri Mar 10 12:51:08 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1159108/GCN5_download_cron
======================================================================
Trigger: 01159108 Segment: 000
BAT Trigger Time: 700035417.9 [s; MET]
Trigger Stop: 700035417.932 [s; MET]
UTC: 2023-03-09T06:16:27.009260 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 45.8877140806812 Dec: 0.625535733131049 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.53
Image Trigger?: NO
Rate S/N Ratio: 6.40312423743285 [ if not an image trigger ]
Image S/N Ratio: 6.53
Flight Position: [ source = BAT ]
RA: 45.8877140806812 Dec: 0.625535733131049 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 45.9680285853463 Dec: 0.620844481756819 [deg; J2000]
{ 03h 03m 52.3s , +00d 37' 15.0" }
+/- 4.80042509590269 [arcmin] (estimated 90% radius based on SNR)
+/- 4.17291332304226 [arcmin] (formal 1-sigma fit error)
SNR: 3.23490602843235
Angular difference between Flight and Ground position is 4.826799 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 0.0320000648498535 +/-
Measured from: 0
to: 0.0320000648498535 [s; relative to TRIGTIME]
T50: 0.0320000648498535 +/-
Measured from: 0
to: 0.0320000648498535 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0320000648498535 second)
Measured from: 0
to: 0.0320000648498535 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0320000648498535 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.001123 0.003979 0.007080 0.000137
0.001239 0.001617 0.001796 0.001442 [error]
Peak -0.001123 0.003979 0.007080 0.000137
0.001239 0.001617 0.001796 0.001442 [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 2.16e-106.91e-14 7.91e-101.94e-12 2.41e-095.15e-11 2.33e-082.00e-08 6.72e-093.65e-10 2.67e-082.00e-08 erg/cm2
Error 2.69e-10 6.75e-10 1.05e-09 9.95e-08 3.22e-09 1.00e-07 erg/cm2
Peak flux Power-law 2.13e-016.37e-05 4.18e-019.20e-04 6.37e-011.22e-02 2.12e+001.41e+00 1.78e+006.01e-02 3.39e+001.43e+00 ph/cm2/s
Error 2.68e-01 3.63e-01 2.75e-01 7.36e+00 7.94e-01 6.74e+00 ph/cm2/s
Fluence Cutoff-PL 3.65e-11 1.44e-09 2.48e-09 5.62e-11 4.01e-09 4.01e-09 erg/cm2
Error 1.30e-10 8.36e-10 1.11e-09 8.77e-10 1.52e-09 1.52e-09 erg/cm2
Peak flux Cutoff-PL 3.23e-02 6.95e-01 7.61e-01 1.05e-02 1.50e+00 1.50e+00 ph/cm2/s
Error 1.24e-01 4.22e-01 3.06e-01 1.33e-01 6.13e-01 6.14e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- 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 -2.733 1.149 - - 7.41e-05 5.27e-05 34.830 57
CPL -10.000 -1.800 57.1 17.3 1.42e+03 3.66e+03 30.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.733 1.149 - - 7.41e-05 5.27e-05 34.830 57
CPL -10.000 -1.800 57.1 17.3 1.42e+03 3.66e+03 30.990 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 0.032 0.000 0.032
T90 0.032 0.000 0.032
T50 0.032 0.000 0.032
Peak 0.032 0.000 0.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
45.9680 +0.6208 0.0594 13.5 44.7 0.0091 3.2 TRIG_01159108
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.900 -1.900 (delta_t = 59.000 [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
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.73301 ( 2.73301 5.03057 )
Norm@50keV : 7.40830E-05 ( -7.4083e-05 3.13995e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.83 using 59 PHA bins.
# Reduced chi-squared = 0.6110 for 57 degrees of freedom
# Null hypothesis probability = 9.910124e-01
Photon flux (15-150 keV) in 0.032 sec: 1.78495 6.00920E-02 ( -0.78178 0.80618 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39392e-15 ( -3.03613e-09 3.40771e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( 10 6.4 )
Epeak [keV] : 57.0909 ( -7.62013 26.9653 )
Norm@50keV : 1418.30 ( -1418.2 5905.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.99 using 59 PHA bins.
# Reduced chi-squared = 0.5534 for 56 degrees of freedom
# Null hypothesis probability = 9.973210e-01
Photon flux (15-150 keV) in 0.032 sec: 1.49628 1.48647 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56628e-14 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.11424 ( 0.961631 0.961631 )
beta : -2.61753 ( 2.60498 2.60498 )
Epeak [keV] : 63.3008 ( -24.0422 96.246 )
Norm@50keV : 3.44057 ( -3.46898 7.9722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.24 using 59 PHA bins.
# Reduced chi-squared = 0.5862 for 55 degrees of freedom
# Null hypothesis probability = 9.938915e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.9940 (-6.90962 72.5688)
R^2/D10^2 : 8.12370E-02 (-0.081237 0.237191)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.00 using 59 PHA bins.
# Reduced chi-squared = 0.5966 for 57 degrees of freedom
# Null hypothesis probability = 9.933285e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.165e-10 1.442e-10
25- 50 1.113e-09 7.024e-10
50-150 3.655e-09 2.251e-09
15-150 4.984e-09 3.138e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.360 (-113.132 -199.362)
Norm : 6.41950 (-3.44427 3.45604)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.053e-11 2.010e-14
25- 50 1.199e-14 4.510e-24
50-150 2.439e-23 0.000e+00
15-150 4.054e-11 1.569e-13
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.288979 (-0.401678 199.598)
R1^2/D10^2 : 3.23711E+18 (-3.36188e+18 1.02007e+23)
kT2 [keV] : 22.3074 (-7.82957 -22.3075)
R2^2/D10^2 : 6.53910E-02 (-0.0646297 0.207633)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.185e-10 1.171e+02
25- 50 1.119e-09 1.075e+03
50-150 3.634e-09 2.518e+04
15-150 4.972e-09 2.664e+04
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.73301 ( 2.73301 5.03057 )
Norm@50keV : 7.40830E-05 ( -7.4083e-05 3.13995e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.83 using 59 PHA bins.
# Reduced chi-squared = 0.6110 for 57 degrees of freedom
# Null hypothesis probability = 9.910124e-01
Photon flux (15-150 keV) in 0.032 sec: 1.78495 6.00920E-02 ( -0.78178 0.80618 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39392e-15 ( -3.03613e-09 3.40771e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( 10 6.4 )
Epeak [keV] : 57.0909 ( -7.62013 26.9653 )
Norm@50keV : 1418.30 ( -1418.2 5905.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.99 using 59 PHA bins.
# Reduced chi-squared = 0.5534 for 56 degrees of freedom
# Null hypothesis probability = 9.973210e-01
Photon flux (15-150 keV) in 0.032 sec: 1.49628 1.48647 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56628e-14 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.11424 ( 0.961631 0.961631 )
beta : -2.61753 ( 2.60498 2.60498 )
Epeak [keV] : 63.3008 ( -24.0422 96.246 )
Norm@50keV : 3.44057 ( -3.46898 7.97222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.24 using 59 PHA bins.
# Reduced chi-squared = 0.5862 for 55 degrees of freedom
# Null hypothesis probability = 9.938915e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.9940 (-6.90962 72.5688)
R^2/D10^2 : 8.12370E-02 (-0.081237 0.237191)
(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 2.165e-10 1.432e-10
25- 50 1.113e-09 7.147e-10
50-150 3.655e-09 2.394e-09
15-150 4.984e-09 3.288e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.360 (-113.132 -199.362)
Norm : 6.41950 (-3.44427 3.45604)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.053e-11 7.694e-18
25- 50 1.199e-14 1.591e-22
50-150 2.439e-23 0.000e+00
15-150 4.054e-11 1.832e-13
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.288979 (-0.401678 199.598)
R1^2/D10^2 : 3.23711E+18 (-3.36188e+18 1.21099e+22)
kT2 [keV] : 22.3074 (-7.82957 -22.3075)
R2^2/D10^2 : 6.53910E-02 (-0.0646297 0.207633)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.185e-10 1.221e+02
25- 50 1.119e-09 9.667e+02
50-150 3.634e-09 2.518e+04
15-150 4.972e-09 2.342e+04
Plot creation:
Fri Mar 10 12:53:36 EST 2023