batgrbproduct analysis for trigger=1191903
batgrbproduct Analysis for Trigger=1191903
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): Thu Sep 14 18:09:07 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1191903/GCN5_download_cron
======================================================================
Trigger: 01191903 Segment: 000
BAT Trigger Time: 716316288 [s; MET]
Trigger Stop: 716316352 [s; MET]
UTC: 2023-09-13T16:44:15.997400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.694660144272 Dec: 35.4336623117075 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.14
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.14
Flight Position: [ source = BAT ]
RA: 299.694660144272 Dec: 35.4336623117075 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.674314836965 Dec: 35.4055399673496 [deg; J2000]
{ 19h 58m 41.8s , +35d 24' 19.9" }
+/- 1.14544912684688 [arcmin] (estimated 90% radius based on SNR)
+/- 0.511860307836555 [arcmin] (formal 1-sigma fit error)
SNR: 25.0534321259992
Angular difference between Flight and Ground position is 1.958761 arcmin
Partial Coding Fraction: 1.015625 [ 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 0.958549 1.174383 0.608549 0.206325
0.050564 0.051467 0.042675 0.034755 [error]
Peak 0.958549 1.174383 0.608549 0.206325
0.050564 0.051467 0.042675 0.034755 [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 2.86e-07 4.36e-07 4.99e-07 1.09e-06 1.55e-06 2.31e-06 erg/cm2
Error 2.48e-08 2.38e-08 4.12e-08 1.87e-07 9.57e-08 2.24e-07 erg/cm2
Peak flux Power-law 1.45e-01 1.22e-01 6.97e-02 5.92e-02 3.62e-01 3.95e-01 ph/cm2/s
Error 1.28e-02 6.71e-03 5.55e-03 9.40e-03 2.01e-02 2.14e-02 ph/cm2/s
Fluence Cutoff-PL 2.77e-07 4.50e-07 4.98e-07 6.65e-07 1.50e-06 1.89e-06 erg/cm2
Error 2.78e-08 3.07e-08 4.34e-08 3.61e-07 1.15e-07 4.58e-07 erg/cm2
Peak flux Cutoff-PL 1.40e-01 1.25e-01 7.00e-02 4.02e-02 3.57e-01 3.75e-01 ph/cm2/s
Error 1.46e-02 8.47e-03 5.81e-03 2.27e-02 2.12e-02 3.11e-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 1.805 0.101 - - 2.62e-03 1.58e-04 63.400 57
CPL 1.525 0.388 75.5 -26.6 3.74e-03 1.95e-03 61.890 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.805 0.101 - - 2.62e-03 1.58e-04 63.400 57
CPL 1.525 0.388 75.5 -26.6 3.74e-03 1.95e-03 61.890 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
299.6743 +35.4055 0.0077 5.9 -158.8 3.0532 25.1 TRIG_01191903
------------------------------------------
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: 1.80521 ( -0.0998138 0.101244 )
Norm@50keV : 2.62326E-03 ( -0.000159143 0.000157787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.40 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 57 degrees of freedom
# Null hypothesis probability = 2.609500e-01
Photon flux (15-150 keV) in 64 sec: 0.362212 ( -0.0200488 0.0200694 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54531e-06 ( -9.53421e-08 9.60845e-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: 1.52480 ( -0.430808 0.34504 )
Epeak [keV] : 75.5412 ( -22.2527 -75.5493 )
Norm@50keV : 3.74400E-03 ( -0.00122387 0.00268152 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.89 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 56 degrees of freedom
# Null hypothesis probability = 2.739770e-01
Photon flux (15-150 keV) in 64 sec: 0.357201 ( -0.021179 0.021156 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4999e-06 ( -1.14835e-07 1.14458e-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 : 1.76630 ( -2.18457 -1.14586 )
beta : -1.97927 ( -0.22184 0.158824 )
Epeak [keV] : 28.9232 ( -6.33887 15.8102 )
Norm@50keV : 0.896702 ( -0.899652 119.377 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.90 using 59 PHA bins.
# Reduced chi-squared = 0.9981 for 55 degrees of freedom
# Null hypothesis probability = 4.785817e-01
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] : 11.0023 ( )
R^2/D10^2 : 0.117070 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 130.64 using 59 PHA bins.
# Reduced chi-squared = 2.2919 for 57 degrees of freedom
# Null hypothesis probability = 1.039380e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.895e-07 2.048e-08
25- 50 5.360e-07 3.229e-08
50-150 3.666e-07 5.395e-08
15-150 1.092e-06 6.944e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.5854 (-18.9285 27.2566)
Norm : 1.59634 (-0.1265 0.142579)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-07 2.566e-08
25- 50 4.604e-07 2.893e-08
50-150 7.400e-07 2.163e-07
15-150 1.467e-06 2.288e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.70793 (-0.89627 0.901506)
R1^2/D10^2 : 0.358693 (-0.112855 0.186104)
kT2 [keV] : 34.0541 (-8.79229 18.4466)
R2^2/D10^2 : 1.33913E-03 (-0.000946561 0.00234855)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.584e-07 6.810e-08
25- 50 4.594e-07 9.270e-08
50-150 7.096e-07 3.608e-07
15-150 1.427e-06 4.533e-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: 1.80521 ( -0.0998138 0.101244 )
Norm@50keV : 2.62326E-03 ( -0.000159143 0.000157787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.40 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 57 degrees of freedom
# Null hypothesis probability = 2.609500e-01
Photon flux (15-150 keV) in 64 sec: 0.362212 ( -0.0200488 0.0200694 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.54531e-06 ( -9.53421e-08 9.60845e-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: 1.52480 ( -0.430808 0.34504 )
Epeak [keV] : 75.5412 ( -22.2527 -75.5493 )
Norm@50keV : 3.74400E-03 ( -0.00122387 0.00268152 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.89 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 56 degrees of freedom
# Null hypothesis probability = 2.739770e-01
Photon flux (15-150 keV) in 64 sec: 0.357201 ( -0.021179 0.021156 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4999e-06 ( -1.14835e-07 1.14458e-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 : 1.76630 ( -2.18457 -1.14586 )
beta : -1.97927 ( -0.22184 0.158824 )
Epeak [keV] : 28.9232 ( -6.33887 15.8102 )
Norm@50keV : 0.896702 ( -0.899652 119.379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.90 using 59 PHA bins.
# Reduced chi-squared = 0.9981 for 55 degrees of freedom
# Null hypothesis probability = 4.785817e-01
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] : 11.0023 ( )
R^2/D10^2 : 0.117070 ( )
(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 1.895e-07 1.968e-08
25- 50 5.360e-07 3.277e-08
50-150 3.666e-07 4.982e-08
15-150 1.092e-06 6.720e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.5854 (-18.9285 27.2566)
Norm : 1.59634 (-0.1265 0.142579)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.670e-07 2.528e-08
25- 50 4.604e-07 2.870e-08
50-150 7.400e-07 2.229e-07
15-150 1.467e-06 2.326e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.70793 (-0.89627 0.901506)
R1^2/D10^2 : 0.358693 (-0.112855 0.186104)
kT2 [keV] : 34.0541 (-8.79229 18.4466)
R2^2/D10^2 : 1.33913E-03 (-0.000946561 0.00234855)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.584e-07 6.675e-08
25- 50 4.594e-07 8.458e-08
50-150 7.096e-07 3.627e-07
15-150 1.427e-06 4.737e-07
Plot creation:
Thu Sep 14 18:11:10 EDT 2023