batgrbproduct analysis for trigger=1186302
batgrbproduct Analysis for Trigger=1186302
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): Mon Aug 21 20:21:19 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1186302/GCN5_download_cron
======================================================================
Trigger: 01186302 Segment: 000
BAT Trigger Time: 714254576 [s; MET]
Trigger Stop: 714254664 [s; MET]
UTC: 2023-08-20T20:02:24.138220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 257.636398703993 Dec: -39.1007312585403 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.96
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.96
Flight Position: [ source = BAT ]
RA: 257.636398703993 Dec: -39.1007312585403 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 257.661531222394 Dec: -39.0810346878741 [deg; J2000]
{ 17h 10m 38.8s , -39d 04' 51.7" }
+/- 3.00363873775013 [arcmin] (estimated 90% radius based on SNR)
+/- 1.70391425423916 [arcmin] (formal 1-sigma fit error)
SNR: 6.32069053431923
Angular difference between Flight and Ground position is 1.663266 arcmin
Partial Coding Fraction: 0.765625 [ including projection effects ]
Duration
T90: 88 +/-
Measured from: 0
to: 88 [s; relative to TRIGTIME]
T50: 88 +/-
Measured from: 0
to: 88 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 88 second)
Measured from: 0
to: 88 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 88 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.813035 0.673724 0.091912 0.001059
0.089876 0.068446 0.054880 0.045906 [error]
Peak 0.813035 0.673724 0.091912 0.001059
0.089876 0.068446 0.054880 0.045906 [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 2.74e-07 2.44e-07 1.50e-07 1.39e-07 7.27e-07 8.07e-07 erg/cm2
Error 4.45e-08 3.55e-08 4.40e-08 7.66e-08 1.08e-07 1.46e-07 erg/cm2
Peak flux Power-law 1.03e-01 5.14e-02 1.57e-02 6.13e-03 1.74e-01 1.76e-01 ph/cm2/s
Error 1.71e-02 7.22e-03 4.47e-03 3.16e-03 2.24e-02 2.26e-02 ph/cm2/s
Fluence Cutoff-PL 2.48e-07 2.91e-07 6.06e-08 9.55e-10 6.01e-07 6.01e-07 erg/cm2
Error 5.27e-08 4.91e-08 5.38e-08 1.29e-08 9.87e-08 9.94e-08 erg/cm2
Peak flux Cutoff-PL 9.09e-02 6.19e-02 7.14e-03 6.15e-05 1.60e-01 1.60e-01 ph/cm2/s
Error 2.06e-02 1.03e-02 5.72e-03 7.33e-04 2.37e-02 2.37e-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 2.707 0.288 - - 7.75e-04 1.67e-04 64.560 57
CPL 1.000 0.000 50.0 0.0 3.07e-03 0.00e+00 91.480 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.707 0.288 - - 7.75e-04 1.67e-04 64.560 57
CPL 1.000 0.000 50.0 0.0 3.07e-03 0.00e+00 91.480 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 88.000 0.000 88.000
T90 88.000 0.000 88.000
T50 88.000 0.000 88.000
Peak 88.000 0.000 88.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
257.6615 -39.0810 0.0305 24.2 146.0 1.4832 6.3 TRIG_01186302
------------------------------------------
Foreground time interval of the image:
0.000 88.000 (delta_t = 88.000 [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 88.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70662 ( -0.275276 0.30059 )
Norm@50keV : 7.74523E-04 ( -0.000166675 0.0001683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.293610e-01
Photon flux (15-150 keV) in 88 sec: 0.173622 ( -0.0223944 0.0224128 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26761e-07 ( -1.06047e-07 1.09465e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.06819E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.48 using 59 PHA bins.
# Reduced chi-squared = 1.634 for 56 degrees of freedom
# Null hypothesis probability = 1.936616e-03
Photon flux (15-150 keV) in 88 sec: 0.160030 ( -0.023665 0.023751 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.00724e-07 ( -9.02299e-08 1.07197e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.578737 ( -3.0281 2.82811 )
beta : -4.34554 ( 4.21914 1.19716 )
Epeak [keV] : 24.5911 ( -6.42758 3.82697 )
Norm@50keV : 0.123334 ( -0.121365 27.6062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.702682e-01
Photon flux (15-150 keV) in 88 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] : 6.74719 (-0.757276 0.847284)
R^2/D10^2 : 0.379729 (-0.155371 0.266591)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.78 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 57 degrees of freedom
# Null hypothesis probability = 4.101765e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.349e-07 5.601e-08
25- 50 2.992e-07 6.090e-08
50-150 4.332e-08 1.843e-08
15-150 5.774e-07 9.865e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.4704 (-5.63411 8.12562)
Norm : 1.67996 (-0.449054 0.635933)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-07 4.858e-08
25- 50 2.699e-07 5.148e-08
50-150 1.112e-07 5.496e-08
15-150 6.480e-07 1.049e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 62.8540 (-61.1878 -61.1878)
R1^2/D10^2 : 3.44691E-05 (-3.52383e-05 0.490934)
kT2 [keV] : 6.50792 (-6.50534 0.893615)
R2^2/D10^2 : 0.433438 (-0.182671 4.63802)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.483e-07 1.252e-07
25- 50 2.958e-07 1.565e-07
50-150 5.337e-08 3.323e-08
15-150 5.975e-07 2.800e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.70662 ( -0.275276 0.30059 )
Norm@50keV : 7.74523E-04 ( -0.000166675 0.0001683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.56 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.293610e-01
Photon flux (15-150 keV) in 88 sec: 0.173622 ( -0.0223944 0.0224128 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.26761e-07 ( -1.06047e-07 1.09465e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.06819E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.48 using 59 PHA bins.
# Reduced chi-squared = 1.634 for 56 degrees of freedom
# Null hypothesis probability = 1.936616e-03
Photon flux (15-150 keV) in 88 sec: 0.160030 ( -0.023665 0.023751 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.00724e-07 ( -9.02299e-08 1.07197e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 88.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.578737 ( -3.0281 2.82811 )
beta : -4.34554 ( 4.21914 1.19716 )
Epeak [keV] : 24.5911 ( -6.42758 3.82697 )
Norm@50keV : 0.123334 ( -0.121365 27.6062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.702682e-01
Photon flux (15-150 keV) in 88 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] : 6.74719 (-0.757276 0.847284)
R^2/D10^2 : 0.379729 (-0.155371 0.266591)
(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 2.349e-07 5.333e-08
25- 50 2.992e-07 6.367e-08
50-150 4.332e-08 1.840e-08
15-150 5.774e-07 1.145e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.4704 (-5.63411 8.12562)
Norm : 1.67996 (-0.449054 0.635933)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-07 4.726e-08
25- 50 2.699e-07 5.302e-08
50-150 1.112e-07 5.328e-08
15-150 6.480e-07 1.145e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 62.8540 (-61.1878 -61.1878)
R1^2/D10^2 : 3.44691E-05 (-3.52383e-05 0.490934)
kT2 [keV] : 6.50792 (-6.50534 0.893615)
R2^2/D10^2 : 0.433438 (-0.182671 4.63802)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.483e-07 1.225e-07
25- 50 2.958e-07 1.641e-07
50-150 5.337e-08 3.347e-08
15-150 5.975e-07 2.996e-07
Plot creation:
Mon Aug 21 20:23:19 EDT 2023