batgrbproduct analysis for trigger=1194500
batgrbproduct Analysis for Trigger=1194500
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): Sun Nov 5 00:52:22 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1194500/GCN5_download_cron
======================================================================
Trigger: 01194500 Segment: 000
BAT Trigger Time: 720755292.224 [s; MET]
Trigger Stop: 720755293.248 [s; MET]
UTC: 2023-11-04T01:47:39.917340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 23.7891451771579 Dec: 83.790808701288 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 23.7
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 23.7
Flight Position: [ source = BAT ]
RA: 23.7891451771579 Dec: 83.790808701288 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 23.8243413740071 Dec: 83.7940846289459 [deg; J2000]
{ 01h 35m 17.8s , +83d 47' 38.7" }
+/- 0.511862946613383 [arcmin] (estimated 90% radius based on SNR)
+/- 0.0915359441018297 [arcmin] (formal 1-sigma fit error)
SNR: 79.1795638357997
Angular difference between Flight and Ground position is 0.301291 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 46.7719999551773 +/- 1.54398441697445
Measured from: -5.73599982261658
to: 41.0360001325607 [s; relative to TRIGTIME]
T50: 22.0519999265671 +/- 0.220036353627589
Measured from: -0.871999859809875
to: 21.1800000667572 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.240000009536743
to: 1.24000000953674 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.3919999599457
to: 55.8400000333786 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.485879 6.822323 6.033152 1.879849
0.065434 0.071993 0.066706 0.051826 [error]
Peak 0.524083 1.023295 1.206753 0.477233
0.015451 0.020534 0.023096 0.018411 [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 1.30e-06 2.80e-06 4.72e-06 1.83e-05 1.30e-05 2.71e-05 erg/cm2
Error 4.86e-08 6.05e-08 8.00e-08 7.61e-07 2.07e-07 7.76e-07 erg/cm2
Peak flux Power-law 4.67e+00 7.05e+00 7.97e+00 1.71e+01 2.48e+01 3.68e+01 ph/cm2/s
Error 2.46e-01 2.21e-01 1.94e-01 9.54e-01 5.86e-01 1.01e+00 ph/cm2/s
Fluence Cutoff-PL 1.30e-06 2.80e-06 4.73e-06 1.81e-05 1.30e-05 2.70e-05 erg/cm2
Error 5.45e-08 6.02e-08 6.46e-08 1.37e-06 2.05e-07 1.37e-06 erg/cm2
Peak flux Cutoff-PL 4.56e+00 7.06e+00 8.04e+00 1.59e+01 2.47e+01 3.55e+01 ph/cm2/s
Error 3.26e-01 2.25e-01 2.49e-01 2.07e+00 6.03e-01 2.29e+00 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 1.244 0.031 - - 1.87e-02 3.08e-04 47.360 57
CPL 1.240 0.031 9999.2 0.0 1.88e-02 1.04e-03 47.410 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.823 0.043 - - 2.16e-01 5.17e-03 51.820 57
CPL 0.745 0.131 995.9 0.0 2.33e-01 2.25e-02 51.170 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: 44.096000 sec.
T50 in the 50-300 keV band: 7.808000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 69.232 -13.392 55.840
T90 46.772 -5.736 41.036
T50 22.052 -0.872 21.180
Peak 1.000 0.240 1.240
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
23.8243 +83.7941 0.0024 20.1 -43.3 13.7740 79.2 TRIG_01194500
------------------------------------------
Foreground time interval of the image:
-13.392 13.777 (delta_t = 27.169 [sec])
Background time interval of the image:
-169.123 -13.392 (delta_t = 155.731 [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 -13.392 sec. to 55.840 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24425 ( -0.0309311 0.030831 )
Norm@50keV : 1.87055E-02 ( -0.000308385 0.000307618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.36 using 59 PHA bins.
# Reduced chi-squared = 0.8308 for 57 degrees of freedom
# Null hypothesis probability = 8.149447e-01
Photon flux (15-150 keV) in 69.23 sec: 2.21029 ( -0.0410572 0.0412626 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29798e-05 ( -2.06629e-07 2.06701e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.392 sec. to 55.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23990 ( -0.0315696 0.0307712 )
Epeak [keV] : 9999.24 ( -9999.26 -9999.26 )
Norm@50keV : 1.87718E-02 ( -0.000293636 0.00178734 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.41 using 59 PHA bins.
# Reduced chi-squared = 0.8466 for 56 degrees of freedom
# Null hypothesis probability = 7.863086e-01
Photon flux (15-150 keV) in 69.23 sec: 2.20951 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29817e-05 ( -2.04021e-07 2.06582e-07 ) ergs/cm2
Band function
Time interval is from -13.392 sec. to 55.840 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.820814 ( 0.818994 5.56525 )
beta : -1.24974 ( 1.24975 0.0336398 )
Epeak [keV] : 81.0299 ( -80.2921 269.898 )
Norm@50keV : 3.61158E-02 ( -0.0181012 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.96 using 59 PHA bins.
# Reduced chi-squared = 0.8538 for 55 degrees of freedom
# Null hypothesis probability = 7.712802e-01
Photon flux (15-150 keV) in 69.23 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] : 21.7571 ( )
R^2/D10^2 : 7.35990E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 821.78 using 59 PHA bins.
# Reduced chi-squared = 14.417 for 57 degrees of freedom
# Null hypothesis probability = 5.023322e-136
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.486e-07 1.592e-08
25- 50 2.357e-06 6.092e-08
50-150 8.332e-06 1.938e-07
15-150 1.114e-05 1.835e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 9.67786 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.668e-06 3.115e-08
25- 50 3.209e-06 5.919e-08
50-150 7.039e-06 1.180e-07
15-150 1.192e-05 2.354e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.67895 (-0.573327 0.604322)
R1^2/D10^2 : 0.951966 (-0.187433 0.246185)
kT2 [keV] : 36.2168 (-2.31726 2.83857)
R2^2/D10^2 : 1.19268E-02 (-0.00255295 0.00288845)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.097e-06 6.785e-08
25- 50 2.892e-06 8.619e-08
50-150 8.977e-06 2.804e-07
15-150 1.297e-05 3.496e-07
Peak spectrum fit
Power-law model
Time interval is from 0.240 sec. to 1.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.822888 ( -0.0430888 0.0428427 )
Norm@50keV : 0.216060 ( -0.00517349 0.0051569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.82 using 59 PHA bins.
# Reduced chi-squared = 0.9091 for 57 degrees of freedom
# Null hypothesis probability = 6.692570e-01
Photon flux (15-150 keV) in 1 sec: 24.8149 ( -0.585429 0.585774 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.50089e-06 ( -6.32637e-08 6.33403e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.240 sec. to 1.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.745391 ( -0.169378 0.0918925 )
Epeak [keV] : 995.866 ( -995.868 -995.868 )
Norm@50keV : 0.232632 ( -0.00537034 0.0395609 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.17 using 59 PHA bins.
# Reduced chi-squared = 0.9138 for 56 degrees of freedom
# Null hypothesis probability = 6.577381e-01
Photon flux (15-150 keV) in 1 sec: 24.7318 ( -0.6089 0.5962 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49547e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.240 sec. to 1.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -0.837923 ( -0.0444367 0.0446262 )
Epeak [keV] : 25.9468 ( -8.28772 4.25856 )
Norm@50keV : 9908.97 ( -139.81 203228 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.10 using 59 PHA bins.
# Reduced chi-squared = 0.8928 for 55 degrees of freedom
# Null hypothesis probability = 6.983238e-01
Photon flux (15-150 keV) in 1 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] : 25.6648 ( )
R^2/D10^2 : 0.578051 ( )
(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 6.522e-08 3.180e-09
25- 50 3.749e-07 1.275e-08
50-150 1.823e-06 6.250e-08
15-150 2.264e-06 5.800e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 97.9270 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.439e-07 6.400e-09
25- 50 4.691e-07 1.085e-08
50-150 1.029e-06 2.600e-08
15-150 1.742e-06 4.350e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.88016 (-1.11413 1.21903)
R1^2/D10^2 : 5.31860 (-1.42505 2.1585)
kT2 [keV] : 44.5091 (-4.96244 7.29141)
R2^2/D10^2 : 0.102017 (-0.034755 0.0415979)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.294e-07 1.285e-08
25- 50 4.267e-07 2.450e-08
50-150 1.964e-06 1.460e-07
15-150 2.520e-06 1.695e-07
Plot creation:
Sun Nov 5 01:00:54 EDT 2023