batgrbproduct analysis for trigger=1192487
batgrbproduct Analysis for Trigger=1192487
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): Tue Sep 19 02:00:46 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192487/GCN5_download_cron
======================================================================
Trigger: 01192487 Segment: 000
BAT Trigger Time: 716699360 [s; MET]
Trigger Stop: 716699424 [s; MET]
UTC: 2023-09-18T03:08:47.971240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.3263501860542 Dec: 21.3737634378702 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.34
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.34
Flight Position: [ source = BAT ]
RA: 83.3263501860542 Dec: 21.3737634378702 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.3074333024738 Dec: 21.3961203745715 [deg; J2000]
{ 05h 33m 13.8s , +21d 23' 46.0" }
+/- 2.24203237798143 [arcmin] (estimated 90% radius based on SNR)
+/- 1.09140568548944 [arcmin] (formal 1-sigma fit error)
SNR: 9.59845666340034
Angular difference between Flight and Ground position is 1.707738 arcmin
Partial Coding Fraction: 0.2460938 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.832519 0.867623 0.501018 0.018662
0.123923 0.125855 0.107107 0.089156 [error]
Peak 0.832519 0.867623 0.501018 0.018662
0.123923 0.125855 0.107107 0.089156 [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 3.31e-07 4.28e-07 4.04e-07 6.75e-07 1.39e-06 1.84e-06 erg/cm2
Error 7.61e-08 6.53e-08 1.08e-07 3.68e-07 2.45e-07 4.79e-07 erg/cm2
Peak flux Power-law 1.69e-01 1.21e-01 5.70e-02 3.79e-02 3.65e-01 3.84e-01 ph/cm2/s
Error 3.97e-02 1.84e-02 1.47e-02 1.92e-02 5.67e-02 5.85e-02 ph/cm2/s
Fluence Cutoff-PL 3.32e-07 4.28e-07 4.03e-07 6.65e-07 1.39e-06 1.83e-06 erg/cm2
Error 7.59e-08 6.63e-08 1.06e-07 4.65e-07 2.42e-07 5.19e-07 erg/cm2
Peak flux Cutoff-PL 1.73e-01 1.20e-01 5.55e-02 3.55e-02 3.66e-01 3.85e-01 ph/cm2/s
Error 3.98e-02 1.87e-02 1.48e-02 2.32e-02 5.69e-02 6.26e-02 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 2.081 0.310 - - 2.34e-03 4.51e-04 71.910 57
CPL 2.620 0.650 220.5 0.0 1.26e-03 0.00e+00 71.080 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.081 0.310 - - 2.34e-03 4.51e-04 71.910 57
CPL 2.620 0.650 220.5 0.0 1.26e-03 0.00e+00 71.080 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.3074 +21.3961 0.0200 49.5 -4.5 2.5878 9.6 TRIG_01192487
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08140 ( -0.295635 0.324503 )
Norm@50keV : 2.33928E-03 ( -0.000462859 0.000439374 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.91 using 59 PHA bins.
# Reduced chi-squared = 1.262 for 57 degrees of freedom
# Null hypothesis probability = 8.825158e-02
Photon flux (15-150 keV) in 64 sec: 0.364685 ( -0.0566206 0.0567732 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3886e-06 ( -2.43405e-07 2.47325e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.62049 ( -1.04565 0.254806 )
Epeak [keV] : 220.542 ( )
Norm@50keV : 1.25959E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.08 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 56 degrees of freedom
# Null hypothesis probability = 8.443299e-02
Photon flux (15-150 keV) in 64 sec: 0.365791 ( -0.058034 0.055823 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3869e-06 ( -2.41395e-07 2.4311e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.66174 ( 1.66018 1.66018 )
beta : -2.08228 ( 2.08234 0.296477 )
Epeak [keV] : 12.7269 ( -13.3429 -13.3429 )
Norm@50keV : 5.77768E-03 ( -0.00364835 0.371929 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.91 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 55 degrees of freedom
# Null hypothesis probability = 6.257615e-02
Photon flux (15-150 keV) in 64 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] : 8.80740 (-1.80212 2.376)
R^2/D10^2 : 0.260154 (-0.157151 0.390745)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.11 using 59 PHA bins.
# Reduced chi-squared = 1.581 for 57 degrees of freedom
# Null hypothesis probability = 3.398266e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.486e-07 7.510e-08
25- 50 5.106e-07 1.372e-07
50-150 1.822e-07 8.307e-08
15-150 9.413e-07 2.529e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.2773 (-27.0728 59.8077)
Norm : 1.77696 (-0.44965 0.631754)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.905e-07 6.294e-08
25- 50 4.571e-07 9.478e-08
50-150 5.699e-07 2.551e-07
15-150 1.317e-06 3.165e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.81527 (-1.61362 1.85135)
R1^2/D10^2 : 1.16483 (-0.780251 3.47642)
kT2 [keV] : 30.1853 (-11.8745 41.0622)
R2^2/D10^2 : 1.91438E-03 (-0.00172676 0.00687761)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.372e-07 1.809e-07
25- 50 4.053e-07 1.799e-07
50-150 7.148e-07 4.064e-07
15-150 1.457e-06 7.448e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08140 ( -0.295635 0.324503 )
Norm@50keV : 2.33928E-03 ( -0.000462859 0.000439374 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.91 using 59 PHA bins.
# Reduced chi-squared = 1.262 for 57 degrees of freedom
# Null hypothesis probability = 8.825158e-02
Photon flux (15-150 keV) in 64 sec: 0.364685 ( -0.0566206 0.0567732 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3886e-06 ( -2.43405e-07 2.47325e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.62049 ( -1.04565 0.254806 )
Epeak [keV] : 220.542 ( )
Norm@50keV : 1.25959E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.08 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 56 degrees of freedom
# Null hypothesis probability = 8.443299e-02
Photon flux (15-150 keV) in 64 sec: 0.365791 ( -0.058034 0.055823 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3869e-06 ( -2.41395e-07 2.4311e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.66174 ( 1.66018 1.66018 )
beta : -2.08228 ( 2.08234 0.296477 )
Epeak [keV] : 12.7269 ( -13.3429 -13.3429 )
Norm@50keV : 5.77768E-03 ( -0.00364835 0.371929 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.91 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 55 degrees of freedom
# Null hypothesis probability = 6.257615e-02
Photon flux (15-150 keV) in 64 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] : 8.80740 (-1.80212 2.376)
R^2/D10^2 : 0.260154 (-0.157151 0.390745)
(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 2.486e-07 7.939e-08
25- 50 5.106e-07 1.407e-07
50-150 1.822e-07 8.061e-08
15-150 9.413e-07 2.666e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.2773 (-27.0728 59.8077)
Norm : 1.77696 (-0.44965 0.631754)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.905e-07 6.576e-08
25- 50 4.571e-07 9.034e-08
50-150 5.699e-07 2.346e-07
15-150 1.317e-06 3.130e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.81527 (-1.61362 1.85135)
R1^2/D10^2 : 1.16483 (-0.780251 3.47642)
kT2 [keV] : 30.1853 (-11.8745 41.0622)
R2^2/D10^2 : 1.91438E-03 (-0.00172676 0.00687761)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.372e-07 1.902e-07
25- 50 4.053e-07 1.989e-07
50-150 7.148e-07 4.200e-07
15-150 1.457e-06 6.734e-07
Plot creation:
Tue Sep 19 02:02:52 EDT 2023