batgrbproduct analysis for trigger=1163401
batgrbproduct Analysis for Trigger=1163401
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): Mon Apr 10 07:03:16 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1163401/GCN5_download_cron
======================================================================
Trigger: 01163401 Segment: 000
BAT Trigger Time: 702709047.872 [s; MET]
Trigger Stop: 702709048.896 [s; MET]
UTC: 2023-04-09T04:56:56.799160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 329.530427345421 Dec: 52.8541952268448 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.2
Image Trigger?: NO
Rate S/N Ratio: 19.723082923316 [ if not an image trigger ]
Image S/N Ratio: 9.2
Flight Position: [ source = BAT ]
RA: 329.530427345421 Dec: 52.8541952268448 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 329.515780401123 Dec: 52.8319824203627 [deg; J2000]
{ 21h 58m 03.8s , +52d 49' 55.1" }
+/- 1.69560083847399 [arcmin] (estimated 90% radius based on SNR)
+/- 0.682680263410714 [arcmin] (formal 1-sigma fit error)
SNR: 14.3058347718758
Angular difference between Flight and Ground position is 1.434582 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 9.79199981689453 +/- 2.58863975001758
Measured from: -0.255999803543091
to: 9.53600001335144 [s; relative to TRIGTIME]
T50: 3.4559999704361 +/- 1.13408284654695
Measured from: 0.576000094413757
to: 4.03200006484985 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.427999973297119
to: 1.42799997329712 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.575999975204468
to: 11.7760000228882 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.634797 0.674035 0.397751 0.022115
0.062323 0.064494 0.056017 0.044889 [error]
Peak 0.155067 0.170309 0.119851 0.001024
0.019885 0.022158 0.017654 0.014038 [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 1.92e-07 2.84e-07 3.14e-07 6.54e-07 9.89e-07 1.44e-06 erg/cm2
Error 3.00e-08 2.99e-08 5.37e-08 2.25e-07 1.24e-07 2.79e-07 erg/cm2
Peak flux Power-law 1.42e+00 1.25e+00 7.59e-01 6.95e-01 3.73e+00 4.12e+00 ph/cm2/s
Error 2.82e-01 1.70e-01 1.40e-01 2.43e-01 5.03e-01 5.58e-01 ph/cm2/s
Fluence Cutoff-PL 1.87e-07 2.93e-07 3.16e-07 4.45e-07 9.71e-07 1.24e-06 erg/cm2
Error 3.32e-08 3.77e-08 5.56e-08 4.40e-07 1.34e-07 4.00e-07 erg/cm2
Peak flux Cutoff-PL 1.32e+00 1.35e+00 7.94e-01 3.63e-01 3.69e+00 3.83e+00 ph/cm2/s
Error 3.16e-01 2.20e-01 1.58e-01 3.48e-01 5.05e-01 6.07e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.34e+00 1.33e+00 7.90e-01 4.17e-01 3.71e+00 3.88e+00 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 1.855 0.194 - - 8.71e-03 1.09e-03 54.660 57
CPL 1.628 0.697 74.6 0.0 1.16e-02 0.00e+00 54.330 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.722 0.217 - - 2.78e-02 4.07e-03 59.270 57
CPL 1.142 0.829 69.3 -24.0 5.76e-02 7.86e-02 57.710 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: 2.496000 sec.
T50 in the 50-300 keV band: 1.152000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 12.352 -0.576 11.776
T90 9.792 -0.256 9.536
T50 3.456 0.576 4.032
Peak 1.000 0.428 1.428
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
329.5158 +52.8320 0.0134 29.2 -87.4 1.7917 14.3 TRIG_01163401
------------------------------------------
Foreground time interval of the image:
-0.576 11.776 (delta_t = 12.352 [sec])
Background time interval of the image:
-239.872 -0.576 (delta_t = 239.296 [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 -0.576 sec. to 11.776 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85539 ( -0.189463 0.198672 )
Norm@50keV : 8.70805E-03 ( -0.00110079 0.00107486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
# Reduced chi-squared = 0.9590 for 57 degrees of freedom
# Null hypothesis probability = 5.632913e-01
Photon flux (15-150 keV) in 12.35 sec: 1.22670 ( -0.130006 0.13005 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.88785e-07 ( -1.235e-07 1.25351e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.576 sec. to 11.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62811 ( -0.757408 0.635664 )
Epeak [keV] : 74.5990 ( )
Norm@50keV : 1.16039E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9702 for 56 degrees of freedom
# Null hypothesis probability = 5.381765e-01
Photon flux (15-150 keV) in 12.35 sec: 1.21683 ( -0.13312 0.13299 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.7133e-07 ( -1.3362e-07 1.35302e-07 ) ergs/cm2
Band function
Time interval is from -0.576 sec. to 11.776 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.62845 ( -3.23187 0.593476 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 74.6265 ( -36.6172 -74.6265 )
Norm@50keV : 1.15967E-02 ( -0.0039105 0.00632679 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9879 for 55 degrees of freedom
# Null hypothesis probability = 5.000437e-01
Photon flux (15-150 keV) in 12.35 sec: 1.22230 ( ) 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] : 11.7379 (-1.70103 1.91498)
R^2/D10^2 : 0.312943 (-0.133077 0.244098)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.35 using 59 PHA bins.
# Reduced chi-squared = 1.445 for 57 degrees of freedom
# Null hypothesis probability = 1.567556e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.124e-07 2.235e-08
25- 50 3.445e-07 4.928e-08
50-150 2.811e-07 7.385e-08
15-150 7.380e-07 1.073e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.1221 (-29.0059 55.0972)
Norm : 5.50720 (-0.788773 0.968308)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.776e-07 2.834e-08
25- 50 3.026e-07 3.841e-08
50-150 4.705e-07 2.026e-07
15-150 9.507e-07 2.337e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.88915 (-1.20892 1.52331)
R1^2/D10^2 : 5.86143 (-3.83453 10.2613)
kT2 [keV] : 19.4407 (-3.85689 6.22176)
R2^2/D10^2 : 3.88370E-02 (-0.0254258 0.0557271)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.961e-07 9.839e-08
25- 50 2.720e-07 9.928e-08
50-150 4.852e-07 2.510e-07
15-150 9.534e-07 3.454e-07
Peak spectrum fit
Power-law model
Time interval is from 0.428 sec. to 1.428 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72244 ( -0.212269 0.220992 )
Norm@50keV : 2.78257E-02 ( -0.0041073 0.0040385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.27 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.929247e-01
Photon flux (15-150 keV) in 1 sec: 3.72502 ( -0.502628 0.502828 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.57204e-07 ( -3.90638e-08 3.9457e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.428 sec. to 1.428 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14155 ( -0.940058 0.718379 )
Epeak [keV] : 69.2699 ( -21.2742 -69.2699 )
Norm@50keV : 5.76316E-02 ( -0.0324459 0.124695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.71 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.118478e-01
Photon flux (15-150 keV) in 1 sec: 3.69492 ( -0.50526 0.50504 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49567e-07 ( -4.0487e-08 4.0976e-08 ) ergs/cm2
Band function
Time interval is from 0.428 sec. to 1.428 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95404 ( -13.6184 -4.95404 )
beta : -1.89097 ( -0.295279 0.26042 )
Epeak [keV] : 24.2264 ( -6.43016 4.42435 )
Norm@50keV : 4259.85 ( -563.426 28291.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.80 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 55 degrees of freedom
# Null hypothesis probability = 4.444823e-01
Photon flux (15-150 keV) in 1 sec: 3.70702 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.50368e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.9375 (-2.07418 2.38606)
R^2/D10^2 : 0.717527 (-0.33231 0.633622)
(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 2.547e-08 6.390e-09
25- 50 8.728e-08 1.709e-08
50-150 9.209e-08 2.656e-08
15-150 2.048e-07 3.925e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 123.537 (-47.5367 -122.059)
Norm : 15.9216 (-2.25439 3.16981)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.142e-08 8.235e-09
25- 50 7.447e-08 1.809e-08
50-150 1.348e-07 7.950e-08
15-150 2.507e-07 1.001e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.49580 (-1.52746 2.23229)
R1^2/D10^2 : 10.2369 (-7.2081 26.8752)
kT2 [keV] : 20.4195 (-4.68529 9.02249)
R2^2/D10^2 : 0.104961 (-0.0795408 0.190626)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.418e-08 2.451e-08
25- 50 7.157e-08 3.784e-08
50-150 1.328e-07 7.688e-08
15-150 2.485e-07 1.159e-07
Plot creation:
Mon Apr 10 07:07:08 EDT 2023