batgrbproduct analysis for trigger=1197027
batgrbproduct Analysis for Trigger=1197027
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): Sat Nov 18 06:49:07 EST 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1197027/GCN5_download_cron
======================================================================
Trigger: 01197027 Segment: 000
BAT Trigger Time: 721883032.064 [s; MET]
Trigger Stop: 721883032.192 [s; MET]
UTC: 2023-11-17T03:03:19.680140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 332.409522560922 Dec: 13.5136059442377 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.19
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 24.19
Flight Position: [ source = BAT ]
RA: 332.409522560922 Dec: 13.5136059442377 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 332.404108466741 Dec: 13.5161404664111 [deg; J2000]
{ 22h 09m 37.0s , +13d 30' 58.1" }
+/- 0.599879108856472 [arcmin] (estimated 90% radius based on SNR)
+/- 0.18137244429616 [arcmin] (formal 1-sigma fit error)
SNR: 63.1204640925592
Angular difference between Flight and Ground position is 0.350553 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 0.667999863624573 +/- 0.0724431094350266
Measured from: -0.0199998617172241
to: 0.648000001907349 [s; relative to TRIGTIME]
T50: 0.199999928474426 +/- 0.0120000839233398
Measured from: 0.0480000972747803
to: 0.248000025749207 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0479999780654907
to: 0.952000021934509 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.424000024795532
to: 1.30400002002716 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.971105 1.355155 1.045019 0.292844
0.020660 0.024100 0.022249 0.014800 [error]
Peak 0.887850 1.292251 1.011039 0.288153
0.018961 0.022770 0.021329 0.013956 [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 3.23e-07 5.75e-07 7.87e-07 2.23e-06 2.27e-06 3.91e-06 erg/cm2
Error 1.50e-08 1.56e-08 2.27e-08 1.45e-07 5.57e-08 1.57e-07 erg/cm2
Peak flux Power-law 9.59e+00 9.59e+00 6.73e+00 7.50e+00 2.89e+01 3.34e+01 ph/cm2/s
Error 4.49e-01 2.67e-01 1.84e-01 4.41e-01 7.47e-01 7.79e-01 ph/cm2/s
Fluence Cutoff-PL 3.05e-07 5.84e-07 8.04e-07 1.66e-06 2.24e-06 3.36e-06 erg/cm2
Error 1.97e-08 1.69e-08 2.62e-08 3.67e-07 6.03e-08 3.68e-07 erg/cm2
Peak flux Cutoff-PL 8.98e+00 9.70e+00 6.91e+00 5.90e+00 2.84e+01 3.15e+01 ph/cm2/s
Error 5.96e-01 2.82e-01 2.24e-01 9.89e-01 8.15e-01 1.36e+00 ph/cm2/s
Fluence Band 2.93e-07 5.89e-07 7.92e-07 1.99e-06 2.23e-06 3.66e-06 erg/cm2
Error -------- 1.94e-08 -------- -------- 6.03e-08 -------- 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 1.549 0.044 - - 1.40e-01 3.28e-03 61.360 57
CPL 1.319 0.179 164.9 181.5 1.78e-01 3.28e-02 56.350 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.510 0.043 - - 2.31e-01 5.38e-03 60.630 57
CPL 1.261 0.178 165.5 140.9 2.99e-01 5.49e-02 54.630 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: 0.576000 sec.
T50 in the 50-300 keV band: 0.128000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1.728 -0.424 1.304
T90 0.668 -0.020 0.648
T50 0.200 0.048 0.248
Peak 1.000 -0.048 0.952
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
332.4041 +13.5161 0.0031 28.8 -178.2 3.6599 63.1 TRIG_01197027
------------------------------------------
Foreground time interval of the image:
-0.424 1.304 (delta_t = 1.728 [sec])
Background time interval of the image:
-60.064 -0.424 (delta_t = 59.640 [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 -0.424 sec. to 1.304 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54898 ( -0.0435321 0.0436182 )
Norm@50keV : 0.139694 ( -0.00328075 0.00328066 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.36 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.224278e-01
Photon flux (15-150 keV) in 1.728 sec: 17.6791 ( -0.463762 0.465067 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27282e-06 ( -5.56596e-08 5.57074e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.424 sec. to 1.304 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31914 ( -0.182662 0.175714 )
Epeak [keV] : 164.906 ( -48.9826 314.091 )
Norm@50keV : 0.177682 ( -0.0291822 0.0364315 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.35 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 56 degrees of freedom
# Null hypothesis probability = 4.616912e-01
Photon flux (15-150 keV) in 1.728 sec: 17.3833 ( -0.509 0.5113 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.24445e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.424 sec. to 1.304 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03063 ( -0.393738 1.49762 )
beta : -1.66823 ( 1.67154 0.103362 )
Epeak [keV] : 84.8652 ( -56.1778 123.387 )
Norm@50keV : 0.259154 ( -0.0811723 0.723724 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.47 using 59 PHA bins.
# Reduced chi-squared = 0.9904 for 55 degrees of freedom
# Null hypothesis probability = 4.947967e-01
Photon flux (15-150 keV) in 1.728 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.23491e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.4715 ( )
R^2/D10^2 : 1.39234 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 425.08 using 59 PHA bins.
# Reduced chi-squared = 7.4576 for 57 degrees of freedom
# Null hypothesis probability = 1.000531e-57
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.340e-07 6.186e-09
25- 50 5.781e-07 1.892e-08
50-150 1.108e-06 4.562e-08
15-150 1.820e-06 5.098e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-10.8727 -200)
Norm : 71.8979 (-1.68728 1.68728)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.094e-07 7.690e-09
25- 50 5.952e-07 1.590e-08
50-150 1.305e-06 3.421e-08
15-150 2.210e-06 5.702e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.94325 (-0.795208 0.84785)
R1^2/D10^2 : 11.5459 (-3.17906 4.89027)
kT2 [keV] : 28.7772 (-2.78415 3.81713)
R2^2/D10^2 : 0.151541 (-0.0551706 0.0707102)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.612e-07 2.160e-08
25- 50 6.023e-07 2.644e-08
50-150 1.353e-06 9.409e-08
15-150 2.216e-06 1.236e-07
Peak spectrum fit
Power-law model
Time interval is from -0.048 sec. to 0.952 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51022 ( -0.0427736 0.0428468 )
Norm@50keV : 0.230714 ( -0.00537519 0.00537515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.63 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 57 degrees of freedom
# Null hypothesis probability = 3.464121e-01
Photon flux (15-150 keV) in 1 sec: 28.8820 ( -0.746467 0.74831 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.18506e-06 ( -5.32787e-08 5.33112e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.048 sec. to 0.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26067 ( -0.181546 0.174752 )
Epeak [keV] : 165.473 ( -46.7458 235.024 )
Norm@50keV : 0.299472 ( -0.0489075 0.0609369 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.63 using 59 PHA bins.
# Reduced chi-squared = 0.9756 for 56 degrees of freedom
# Null hypothesis probability = 5.267088e-01
Photon flux (15-150 keV) in 1 sec: 28.3842 ( -0.8129 0.8163 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15668e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.048 sec. to 0.952 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.941343 ( -0.380148 1.16919 )
beta : -1.64257 ( -0.2211 0.0985373 )
Epeak [keV] : 84.9080 ( -44.9169 113.588 )
Norm@50keV : 0.453655 ( -0.16906 2.58665 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.33 using 59 PHA bins.
# Reduced chi-squared = 0.9332 for 55 degrees of freedom
# Null hypothesis probability = 6.157886e-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] : 16.7339 ( )
R^2/D10^2 : 2.18969 ( )
(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 1.254e-07 6.250e-09
25- 50 5.479e-07 1.655e-08
50-150 1.090e-06 4.450e-08
15-150 1.763e-06 4.700e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.1531 -200)
Norm : 118.587 (-2.76346 2.76346)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.954e-07 8.150e-09
25- 50 5.682e-07 1.435e-08
50-150 1.246e-06 3.400e-08
15-150 2.110e-06 5.350e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.42497 (-0.845161 0.90293)
R1^2/D10^2 : 15.3982 (-4.06929 6.16996)
kT2 [keV] : 30.4984 (-3.29217 4.72797)
R2^2/D10^2 : 0.205694 (-0.0816042 0.107788)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.345e-07 1.650e-08
25- 50 5.754e-07 2.530e-08
50-150 1.323e-06 1.010e-07
15-150 2.132e-06 1.335e-07
Plot creation:
Sat Nov 18 06:51:03 EST 2023