batgrbproduct analysis for trigger=1186390
batgrbproduct Analysis for Trigger=1186390
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 Aug 22 16:25:07 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1186390/GCN5_download_cron
======================================================================
Trigger: 01186390 Segment: 000
BAT Trigger Time: 714323552 [s; MET]
Trigger Stop: 714323616 [s; MET]
UTC: 2023-08-21T15:12:00.133500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.932949608195 Dec: 35.5048846849232 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.56
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 14.56
Flight Position: [ source = BAT ]
RA: 299.932949608195 Dec: 35.5048846849232 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.933020263214 Dec: 35.5150536021932 [deg; J2000]
{ 19h 59m 43.9s , +35d 30' 54.2" }
+/- 1.53270398755317 [arcmin] (estimated 90% radius based on SNR)
+/- 0.441377118671643 [arcmin] (formal 1-sigma fit error)
SNR: 16.5263889455107
Angular difference between Flight and Ground position is 0.610145 arcmin
Partial Coding Fraction: 1 [ 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 0.709043 0.828339 0.466862 0.104573
0.048725 0.049383 0.042260 0.036140 [error]
Peak 0.709043 0.828339 0.466862 0.104573
0.048725 0.049383 0.042260 0.036140 [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 2.06e-07 3.18e-07 3.71e-07 8.30e-07 1.14e-06 1.73e-06 erg/cm2
Error 2.22e-08 2.23e-08 4.00e-08 1.83e-07 9.32e-08 2.21e-07 erg/cm2
Peak flux Power-law 1.04e-01 8.88e-02 5.17e-02 4.49e-02 2.64e-01 2.90e-01 ph/cm2/s
Error 1.15e-02 6.27e-03 5.38e-03 9.20e-03 1.87e-02 2.04e-02 ph/cm2/s
Fluence Cutoff-PL 1.92e-07 3.40e-07 3.70e-07 3.32e-07 1.08e-06 1.23e-06 erg/cm2
Error 2.55e-08 2.95e-08 4.39e-08 2.93e-07 1.08e-07 3.13e-07 erg/cm2
Peak flux Cutoff-PL 9.66e-02 9.43e-02 5.22e-02 2.18e-02 2.57e-01 2.65e-01 ph/cm2/s
Error 1.33e-02 8.05e-03 5.87e-03 1.50e-02 1.97e-02 2.49e-02 ph/cm2/s
Fluence Band 1.90e-07 3.40e-07 3.66e-07 4.64e-07 1.08e-06 1.36e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 9.63e-02 9.46e-02 5.19e-02 2.73e-02 2.57e-01 2.70e-01 ph/cm2/s
Error -------- -------- -------- -------- 1.96e-02 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.781 0.127 - - 1.93e-03 1.53e-04 58.150 57
CPL 1.203 0.556 61.7 65.6 4.01e-03 3.14e-03 54.480 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.781 0.127 - - 1.93e-03 1.53e-04 58.150 57
CPL 1.203 0.556 61.7 65.6 4.01e-03 3.14e-03 54.480 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 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
299.9330 +35.5151 0.0116 0.2 5.2 2.0776 16.5 TRIG_01186390
------------------------------------------
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: 1.78131 ( -0.125952 0.128807 )
Norm@50keV : 1.93171E-03 ( -0.000153771 0.000152034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.15 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.328575e-01
Photon flux (15-150 keV) in 64 sec: 0.264281 ( -0.0186604 0.0186727 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13898e-06 ( -9.26944e-08 9.37651e-08 ) 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: 1.20336 ( -0.592888 0.518409 )
Epeak [keV] : 61.6592 ( -13.4133 117.876 )
Norm@50keV : 4.00687E-03 ( -0.00189068 0.00439502 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 59 PHA bins.
# Reduced chi-squared = 0.9728 for 56 degrees of freedom
# Null hypothesis probability = 5.326244e-01
Photon flux (15-150 keV) in 64 sec: 0.257198 ( -0.019683 0.019661 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07526e-06 ( -1.06394e-07 1.08787e-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 : -0.893004 ( -0.551006 3.08442 )
beta : -2.07161 ( 2.06813 0.293012 )
Epeak [keV] : 48.2768 ( -23.3783 115.121 )
Norm@50keV : 6.48491E-03 ( -0.00676374 2.92422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.37 using 59 PHA bins.
# Reduced chi-squared = 0.9886 for 55 degrees of freedom
# Null hypothesis probability = 4.985598e-01
Photon flux (15-150 keV) in 64 sec: 0.257164 ( 6.74284 -0.019646 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07661e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.6912 (-0.967984 1.06876)
R^2/D10^2 : 6.93248E-02 (-0.0192682 0.0263224)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.38 using 59 PHA bins.
# Reduced chi-squared = 1.586 for 57 degrees of freedom
# Null hypothesis probability = 3.211083e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.279e-07 1.597e-08
25- 50 3.903e-07 3.286e-08
50-150 3.151e-07 5.357e-08
15-150 8.333e-07 7.072e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 100.120 (-22.7371 39.0872)
Norm : 1.16739 (-0.113919 0.123811)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.953e-07 2.256e-08
25- 50 3.378e-07 2.707e-08
50-150 5.477e-07 1.901e-07
15-150 1.081e-06 2.029e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.51872 (-1.69605 1.734)
R1^2/D10^2 : 0.383082 (-0.198333 0.545459)
kT2 [keV] : 20.7753 (-4.6567 9.45535)
R2^2/D10^2 : 5.93179E-03 (-0.00450721 0.0110854)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.856e-07 5.853e-08
25- 50 3.423e-07 1.049e-07
50-150 5.336e-07 2.699e-07
15-150 1.062e-06 3.830e-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: 1.78131 ( -0.125952 0.128807 )
Norm@50keV : 1.93171E-03 ( -0.000153771 0.000152034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.15 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.328575e-01
Photon flux (15-150 keV) in 64 sec: 0.264281 ( -0.0186604 0.0186727 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13898e-06 ( -9.26944e-08 9.37651e-08 ) 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: 1.20336 ( -0.592888 0.518409 )
Epeak [keV] : 61.6592 ( -13.4133 117.876 )
Norm@50keV : 4.00687E-03 ( -0.00189068 0.00439502 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 59 PHA bins.
# Reduced chi-squared = 0.9728 for 56 degrees of freedom
# Null hypothesis probability = 5.326244e-01
Photon flux (15-150 keV) in 64 sec: 0.257198 ( -0.019683 0.019661 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07526e-06 ( -1.06394e-07 1.08787e-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 : -0.893004 ( -0.551006 3.08442 )
beta : -2.07161 ( 2.06813 0.293012 )
Epeak [keV] : 48.2768 ( -23.3783 115.121 )
Norm@50keV : 6.48491E-03 ( -0.00676374 2.92422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.37 using 59 PHA bins.
# Reduced chi-squared = 0.9886 for 55 degrees of freedom
# Null hypothesis probability = 4.985598e-01
Photon flux (15-150 keV) in 64 sec: 0.257164 ( 6.74284 -0.019646 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07661e-06 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.6912 (-0.967984 1.06876)
R^2/D10^2 : 6.93248E-02 (-0.0192682 0.0263224)
(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 1.279e-07 1.722e-08
25- 50 3.903e-07 3.328e-08
50-150 3.151e-07 5.270e-08
15-150 8.333e-07 6.976e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 100.120 (-22.7371 39.0872)
Norm : 1.16739 (-0.113919 0.123811)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.953e-07 2.272e-08
25- 50 3.378e-07 2.752e-08
50-150 5.477e-07 1.871e-07
15-150 1.081e-06 2.016e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.51872 (-1.69605 1.734)
R1^2/D10^2 : 0.383082 (-0.198333 0.545103)
kT2 [keV] : 20.7753 (-4.6567 9.45535)
R2^2/D10^2 : 5.93179E-03 (-0.00450721 0.0110854)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.856e-07 5.728e-08
25- 50 3.423e-07 1.028e-07
50-150 5.336e-07 2.671e-07
15-150 1.062e-06 3.239e-07
Plot creation:
Tue Aug 22 16:27:02 EDT 2023