batgrbproduct analysis for trigger=1192088
batgrbproduct Analysis for Trigger=1192088
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 Sep 15 18:55:07 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1192088/GCN5_download_cron
======================================================================
Trigger: 01192088 Segment: 000
BAT Trigger Time: 716434272 [s; MET]
Trigger Stop: 716434336 [s; MET]
UTC: 2023-09-15T01:30:39.989340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.943857239753 Dec: -15.4400759729901 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.92
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.92
Flight Position: [ source = BAT ]
RA: 244.943857239753 Dec: -15.4400759729901 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.925314861137 Dec: -15.4749280432908 [deg; J2000]
{ 16h 19m 42.1s , -15d 28' 29.7" }
+/- 2.32816328604672 [arcmin] (estimated 90% radius based on SNR)
+/- 0.855979053665528 [arcmin] (formal 1-sigma fit error)
SNR: 9.09522549628601
Angular difference between Flight and Ground position is 2.350027 arcmin
Partial Coding Fraction: 0.8203125 [ 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 1.543452 0.237863 -0.080848 0.012418
0.068536 0.064112 0.053413 0.046566 [error]
Peak 1.543452 0.237863 -0.080848 0.012418
0.068536 0.064112 0.053413 0.046566 [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 5.23e-07 1.00e-07 9.33e-09 9.47e-10 6.34e-07 6.34e-07 erg/cm2
Error 6.29e-08 2.97e-08 6.59e-09 1.35e-09 7.39e-08 7.39e-08 erg/cm2
Peak flux Power-law 2.86e-01 3.18e-02 1.48e-03 7.22e-05 3.19e-01 3.19e-01 ph/cm2/s
Error 3.53e-02 8.94e-03 1.02e-03 9.99e-05 3.67e-02 3.67e-02 ph/cm2/s
Fluence Cutoff-PL 5.28e-07 8.34e-08 1.33e-09 9.23e-13 6.13e-07 6.13e-07 erg/cm2
Error 6.48e-08 3.86e-08 7.70e-09 1.07e-09 7.42e-08 7.43e-08 erg/cm2
Peak flux Cutoff-PL 2.87e-01 2.74e-02 2.34e-04 8.67e-08 3.14e-01 3.14e-01 ph/cm2/s
Error 3.64e-02 1.14e-02 1.20e-03 7.95e-05 3.75e-02 3.75e-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 5.422 0.573 - - 1.37e-04 7.76e-05 73.290 57
CPL 1.000 0.000 50.0 0.0 2.45e-03 0.00e+00 230.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.422 0.573 - - 1.37e-04 7.76e-05 73.290 57
CPL 1.000 0.000 50.0 0.0 2.45e-03 0.00e+00 230.170 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
244.9253 -15.4749 0.0212 29.7 173.1 1.6988 9.1 TRIG_01192088
------------------------------------------
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: 5.42219 ( -0.547484 0.598988 )
Norm@50keV : 1.37432E-04 ( -6.2171e-05 9.29943e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.29 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 57 degrees of freedom
# Null hypothesis probability = 7.193192e-02
Photon flux (15-150 keV) in 64 sec: 0.318915 ( -0.0366493 0.0366714 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.33562e-07 ( -7.36845e-08 7.40218e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.45289E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 230.17 using 59 PHA bins.
# Reduced chi-squared = 4.1102 for 56 degrees of freedom
# Null hypothesis probability = 5.545570e-23
Photon flux (15-150 keV) in 64 sec: 0.314168 ( -0.037681 0.03733 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.12968e-07 ( -7.32224e-08 7.52749e-08 ) 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 : -1.86003 ( 1.61829 1.61829 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 0.832649 ( -0.149652 7.06742 )
Norm@50keV : 0.111765 ( -0.0573624 0.0902911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.29 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 55 degrees of freedom
# Null hypothesis probability = 5.892704e-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] : 2.80800 (-0.310571 0.356674)
R^2/D10^2 : 67.4693 (-37.9288 91.5193)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.90 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 57 degrees of freedom
# Null hypothesis probability = 6.551756e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.289e-07 1.336e-07
25- 50 6.084e-08 2.404e-08
50-150 5.621e-11 5.118e-11
15-150 5.898e-07 1.678e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.29031 (-0.872164 1.11648)
Norm : 59.0958 (-28.336 59.5616)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.295e-07 1.561e-07
25- 50 7.584e-08 2.960e-08
50-150 5.187e-10 4.456e-10
15-150 6.059e-07 1.705e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.15960 (-0.310508 0.356737)
R1^2/D10^2 : 27.2516 (-37.9297 91.5061)
kT2 [keV] : 1.08705 (-1.35043 1.60082)
R2^2/D10^2 : 1.31854E+05 (-138385 5.44444e+08)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 5.42219 ( -0.547484 0.598988 )
Norm@50keV : 1.37432E-04 ( -6.2171e-05 9.29943e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.29 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 57 degrees of freedom
# Null hypothesis probability = 7.193192e-02
Photon flux (15-150 keV) in 64 sec: 0.318915 ( -0.0366493 0.0366714 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.33562e-07 ( -7.36845e-08 7.40218e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.45289E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 230.17 using 59 PHA bins.
# Reduced chi-squared = 4.1102 for 56 degrees of freedom
# Null hypothesis probability = 5.545570e-23
Photon flux (15-150 keV) in 64 sec: 0.314168 ( -0.037681 0.03733 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.12968e-07 ( -7.32224e-08 7.52749e-08 ) 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 : -1.86003 ( 1.61829 1.61829 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 0.832649 ( -0.149652 7.06743 )
Norm@50keV : 0.111765 ( -0.0573624 0.0902911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.29 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 55 degrees of freedom
# Null hypothesis probability = 5.892704e-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] : 2.80800 (-0.310571 0.356674)
R^2/D10^2 : 67.4693 (-37.9288 91.5193)
(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 5.289e-07 1.683e-07
25- 50 6.084e-08 2.566e-08
50-150 5.621e-11 4.984e-11
15-150 5.898e-07 1.778e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.29031 (-0.872164 1.11648)
Norm : 59.0958 (-28.336 59.5616)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.295e-07 1.393e-07
25- 50 7.584e-08 2.834e-08
50-150 5.187e-10 4.369e-10
15-150 6.059e-07 1.580e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.15960 (-0.310508 0.356737)
R1^2/D10^2 : 27.2516 (-37.9297 91.5061)
kT2 [keV] : 1.08705 (-1.35043 1.60082)
R2^2/D10^2 : 1.31854E+05 (-138385 5.44446e+08)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Fri Sep 15 18:57:17 EDT 2023