batgrbproduct analysis for trigger=1186032
batgrbproduct Analysis for Trigger=1186032
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 10:58:04 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1186032/GCN5_download_cron
======================================================================
Trigger: 01186032 Segment: 000
BAT Trigger Time: 714094086.208 [s; MET]
Trigger Stop: 714094086.72 [s; MET]
UTC: 2023-08-18T23:27:34.357180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 285.882942578261 Dec: 40.8763661027751 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.15
Image Trigger?: NO
Rate S/N Ratio: 10.6301458127346 [ if not an image trigger ]
Image S/N Ratio: 9.15
Flight Position: [ source = BAT ]
RA: 285.882942578261 Dec: 40.8763661027751 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 285.888356658597 Dec: 40.8873560650864 [deg; J2000]
{ 19h 03m 33.2s , +40d 53' 14.5" }
+/- 1.08828309046975 [arcmin] (estimated 90% radius based on SNR)
+/- 0.429463345909116 [arcmin] (formal 1-sigma fit error)
SNR: 26.9544191939194
Angular difference between Flight and Ground position is 0.703652 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 9.8199999332428 +/- 1.24995361730963
Measured from: 0.356000185012817
to: 10.1760001182556 [s; relative to TRIGTIME]
T50: 3.37999999523163 +/- 0.5978360460828
Measured from: 1.88400018215179
to: 5.26400017738342 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.59200000762939
to: 2.59200000762939 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0680000782012939
to: 12.1000000238419 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.553714 0.950618 0.858529 0.325256
0.045827 0.049209 0.044875 0.036046 [error]
Peak 0.147444 0.268085 0.273084 0.084021
0.015143 0.018911 0.017976 0.013215 [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-07 4.33e-07 6.74e-07 2.31e-06 1.88e-06 3.64e-06 erg/cm2
Error 2.37e-08 2.82e-08 4.35e-08 3.36e-07 1.10e-07 3.59e-07 erg/cm2
Peak flux Power-law 1.84e+00 2.14e+00 1.79e+00 2.51e+00 6.67e+00 8.28e+00 ph/cm2/s
Error 2.48e-01 1.79e-01 1.42e-01 4.09e-01 4.96e-01 5.99e-01 ph/cm2/s
Fluence Cutoff-PL 2.10e-07 4.37e-07 6.83e-07 1.99e-06 1.87e-06 3.32e-06 erg/cm2
Error 2.20e-08 2.31e-08 5.08e-08 5.33e-07 1.12e-07 6.41e-07 erg/cm2
Peak flux Cutoff-PL 1.69e+00 2.21e+00 1.88e+00 1.72e+00 6.59e+00 7.49e+00 ph/cm2/s
Error 3.02e-01 2.03e-01 1.80e-01 7.95e-01 5.04e-01 9.43e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.26e+00 1.79e+00 1.45e+00 1.95e+00 5.21e+00 6.44e+00 ph/cm2/s
Error -------- -------- 1.35e-01 -------- 4.68e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.360 0.098 - - 1.60e-02 8.87e-04 65.680 57
CPL 1.246 0.295 371.2 0.0 1.81e-02 5.79e-03 65.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.260 0.117 - - 5.63e-02 3.99e-03 59.840 57
CPL 0.867 0.478 159.8 -49.0 8.61e-02 4.69e-02 57.810 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: 5.760000 sec.
T50 in the 50-300 keV band: 2.432000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 12.032 0.068 12.100
T90 9.820 0.356 10.176
T50 3.380 1.884 5.264
Peak 1.000 1.592 2.592
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
285.8884 +40.8874 0.0071 46.4 -153.7 2.6507 27.0 TRIG_01186032
------------------------------------------
Foreground time interval of the image:
0.068 9.993 (delta_t = 9.925 [sec])
Background time interval of the image:
-60.208 -46.866 (delta_t = 13.342 [sec])
-46.208 0.068 (delta_t = 46.276 [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 0.068 sec. to 12.100 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36027 ( -0.0983765 0.0978613 )
Norm@50keV : 1.60400E-02 ( -0.000887636 0.000887357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.68 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.012818e-01
Photon flux (15-150 keV) in 12.03 sec: 1.93649 ( -0.116125 0.116666 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88031e-06 ( -1.09484e-07 1.09676e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.068 sec. to 12.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24554 ( -0.389917 0.200399 )
Epeak [keV] : 371.226 ( -371.3 -371.3 )
Norm@50keV : 1.80929E-02 ( -0.0027652 0.00881792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.40 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 56 degrees of freedom
# Null hypothesis probability = 1.826707e-01
Photon flux (15-150 keV) in 12.03 sec: 1.92496 ( -0.1213 0.12161 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87217e-06 ( -1.14032e-07 1.09437e-07 ) ergs/cm2
Band function
Time interval is from 0.068 sec. to 12.100 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.894513 ( 0.899239 0.899239 )
beta : -1.41443 ( 1.41429 0.142361 )
Epeak [keV] : 91.4157 ( -92.9713 812.007 )
Norm@50keV : 2.98464E-02 ( -0.0139 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.16 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 55 degrees of freedom
# Null hypothesis probability = 1.641347e-01
Photon flux (15-150 keV) in 12.03 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] : 18.4816 ( )
R^2/D10^2 : 0.109474 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 142.60 using 59 PHA bins.
# Reduced chi-squared = 2.5018 for 57 degrees of freedom
# Null hypothesis probability = 2.763606e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.928e-08 1.063e-08
25- 50 4.210e-07 3.254e-08
50-150 1.051e-06 9.510e-08
15-150 1.561e-06 1.047e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.5907 -200)
Norm : 8.15804 (-0.454373 0.454373)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.445e-07 1.630e-08
25- 50 4.703e-07 3.236e-08
50-150 1.031e-06 1.879e-07
15-150 1.746e-06 2.081e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.06866 (-1.46707 1.67517)
R1^2/D10^2 : 1.15978 (-0.519591 1.12295)
kT2 [keV] : 32.4166 (-5.58248 9.9745)
R2^2/D10^2 : 1.34587E-02 (-0.00777778 0.0125351)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.906e-07 4.534e-08
25- 50 4.548e-07 8.734e-08
50-150 1.235e-06 2.632e-07
15-150 1.881e-06 3.884e-07
Peak spectrum fit
Power-law model
Time interval is from 1.592 sec. to 2.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25983 ( -0.117418 0.11642 )
Norm@50keV : 5.63112E-02 ( -0.0039896 0.0039883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.84 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.729651e-01
Photon flux (15-150 keV) in 1 sec: 6.67086 ( -0.49565 0.496466 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.62118e-07 ( -4.24816e-08 4.25576e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.592 sec. to 2.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.867351 ( -0.520357 0.436338 )
Epeak [keV] : 159.776 ( -61.7956 -159.776 )
Norm@50keV : 8.60729E-02 ( -0.0314503 0.0624136 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.81 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 56 degrees of freedom
# Null hypothesis probability = 4.082295e-01
Photon flux (15-150 keV) in 1 sec: 6.59471 ( -0.50367 0.50437 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.54844e-07 ( -4.4238e-08 4.3958e-08 ) ergs/cm2
Band function
Time interval is from 1.592 sec. to 2.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.371115 ( -0.845181 0.364924 )
beta : -1.48667 ( 1.48421 0.253552 )
Epeak [keV] : 82.6837 ( -50.2777 189.031 )
Norm@50keV : 0.166722 ( -0.108918 916.936 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.59 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.152539e-01
Photon flux (15-150 keV) in 1 sec: 5.20662 ( 1.79338 -0.46659 ) 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] : 18.3893 (-1.56707 1.77586)
R^2/D10^2 : 0.410434 (-0.111234 0.146697)
(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 2.759e-08 3.765e-09
25- 50 1.296e-07 1.360e-08
50-150 3.199e-07 3.880e-08
15-150 4.772e-07 3.810e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-15.3138 -200)
Norm : 28.0660 (-2.01745 2.01745)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.987e-08 6.210e-09
25- 50 1.344e-07 1.485e-08
50-150 2.948e-07 7.785e-08
15-150 4.991e-07 8.670e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.0509 (-2.57342 2.67787)
R1^2/D10^2 : 1.97482 (-0.888578 2.36705)
kT2 [keV] : 38.1789 (-11.8438 49.7592)
R2^2/D10^2 : 2.67432E-02 (-0.0221764 0.0611044)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.590e-08 1.621e-08
25- 50 1.369e-07 3.676e-08
50-150 3.692e-07 1.640e-07
15-150 5.519e-07 2.033e-07
Plot creation:
Mon Aug 21 11:03:00 EDT 2023