batgrbproduct analysis for trigger=1075565
batgrbproduct Analysis for Trigger=1075565
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 Oct 1 10:51:03 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1075565/batgroup_hand_proc
======================================================================
Trigger: 01075565 Segment: 000
BAT Trigger Time: 654662840 [s; MET]
Trigger Stop: 654662904 [s; MET]
UTC: 2021-09-30T02:46:52.183340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 197.435314036749 Dec: 48.6229469478518 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.5
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.5
Flight Position: [ source = BAT ]
RA: 197.435314036749 Dec: 48.6229469478518 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 197.414607591782 Dec: 48.6297429062774 [deg; J2000]
{ 13h 09m 39.5s , +48d 37' 47.1" }
+/- 1.56526689105116 [arcmin] (estimated 90% radius based on SNR)
+/- 0.659913758544728 [arcmin] (formal 1-sigma fit error)
SNR: 16.037436610934
Angular difference between Flight and Ground position is 0.916841 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 11.8119999170303 +/- 1.94082558518738
Measured from: 6.52799999713898
to: 18.3399999141693 [s; relative to TRIGTIME]
T50: 5.53999996185303 +/- 1.23482786623791
Measured from: 8.73199999332428
to: 14.2719999551773 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.39999997615814
to: 9.39999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: 5.83599996566772
to: 19.2359999418259 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.204113 0.271806 0.161394 0.033417
0.023288 0.024056 0.020767 0.017774 [error]
Peak 0.036767 0.024888 0.022519 0.010085
0.006672 0.006903 0.006052 0.004993 [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 5.93e-08 1.04e-07 1.39e-07 3.82e-07 4.05e-07 6.85e-07 erg/cm2
Error 1.01e-08 1.09e-08 2.06e-08 1.21e-07 4.87e-08 1.38e-07 erg/cm2
Peak flux Power-law 2.78e-01 2.40e-01 1.42e-01 1.26e-01 7.15e-01 7.86e-01 ph/cm2/s
Error 1.01e-01 5.35e-02 5.35e-02 9.74e-02 1.59e-01 1.82e-01 ph/cm2/s
Fluence Cutoff-PL 5.90e-08 1.05e-07 1.39e-07 3.27e-07 4.03e-07 6.21e-07 erg/cm2
Error 8.68e-09 1.26e-08 2.06e-08 2.45e-07 5.28e-08 1.78e-07 erg/cm2
Peak flux Cutoff-PL 2.77e-01 2.40e-01 1.43e-01 1.26e-01 7.14e-01 7.86e-01 ph/cm2/s
Error 9.79e-02 5.34e-02 5.32e-02 1.22e-01 1.59e-01 1.82e-01 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 1.579 0.189 - - 3.22e-03 3.53e-04 51.620 57
CPL 1.461 0.515 199.6 0.0 3.70e-03 3.41e-03 51.710 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.758 0.482 - - 5.27e-03 1.47e-03 47.640 57
CPL 2.039 0.485 16.3 -0.0 3.63e-03 4.48e-03 46.870 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: 8.512000 sec.
T50 in the 50-300 keV band: 4.224000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.400 5.836 19.236
T90 11.812 6.528 18.340
T50 5.540 8.732 14.272
Peak 1.000 8.400 9.400
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
197.4146 +48.6297 0.0121 19.0 -159.4 0.7159 16.0 TRIG_01075565
------------------------------------------
Foreground time interval of the image:
5.836 19.236 (delta_t = 13.400 [sec])
Background time interval of the image:
-239.000 5.836 (delta_t = 244.836 [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 5.836 sec. to 19.236 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57851 ( -0.186823 0.190553 )
Norm@50keV : 3.22152E-03 ( -0.000355113 0.000350573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.62 using 59 PHA bins.
# Reduced chi-squared = 0.9055 for 57 degrees of freedom
# Null hypothesis probability = 6.765563e-01
Photon flux (15-150 keV) in 13.4 sec: 0.411272 ( -0.0426038 0.0426588 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04811e-07 ( -4.83661e-08 4.90539e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.836 sec. to 19.236 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46137 ( -0.794036 0.236222 )
Epeak [keV] : 199.582 ( -533.244 -533.244 )
Norm@50keV : 3.70290E-03 ( -0.00165805 0.00516412 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.71 using 59 PHA bins.
# Reduced chi-squared = 0.9235 for 56 degrees of freedom
# Null hypothesis probability = 6.377121e-01
Photon flux (15-150 keV) in 13.4 sec: 0.410461 ( -0.044638 0.043252 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.03201e-07 ( -5.51959e-08 5.03612e-08 ) ergs/cm2
Band function
Time interval is from 5.836 sec. to 19.236 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09009 ( 1.13193 1.13193 )
beta : -1.69349 ( 1.68881 0.290273 )
Epeak [keV] : 71.7044 ( -74.6493 -74.6493 )
Norm@50keV : 6.26811E-03 ( -0.00278947 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.42 using 59 PHA bins.
# Reduced chi-squared = 0.9350 for 55 degrees of freedom
# Null hypothesis probability = 6.120383e-01
Photon flux (15-150 keV) in 13.4 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] : 13.0737 (-1.69769 2.06033)
R^2/D10^2 : 7.33110E-02 (-0.0297917 0.0476327)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.08 using 59 PHA bins.
# Reduced chi-squared = 1.317 for 57 degrees of freedom
# Null hypothesis probability = 5.456242e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.561e-08 7.149e-09
25- 50 1.234e-07 1.820e-08
50-150 1.338e-07 2.991e-08
15-150 2.928e-07 4.000e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 197.096 (-86.0946 -195.74)
Norm : 1.67001 (-0.174155 0.203159)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.581e-08 3.091e-08
25- 50 1.072e-07 5.283e-08
50-150 2.342e-07 1.248e-07
15-150 3.973e-07 2.124e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.27538 (-2.19952 2.11347)
R1^2/D10^2 : 0.281068 (-0.146444 0.469273)
kT2 [keV] : 36.2101 (-14.0742 99.8666)
R2^2/D10^2 : 1.60121E-03 (-0.00150885 0.00712662)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.167e-08 1.860e-08
25- 50 1.143e-07 4.319e-08
50-150 2.423e-07 1.278e-07
15-150 4.083e-07 1.786e-07
Peak spectrum fit
Power-law model
Time interval is from 8.400 sec. to 9.400 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75819 ( -0.447097 0.517679 )
Norm@50keV : 5.26864E-03 ( -0.00154216 0.00139155 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.64 using 59 PHA bins.
# Reduced chi-squared = 0.8358 for 57 degrees of freedom
# Null hypothesis probability = 8.069114e-01
Photon flux (15-150 keV) in 1 sec: 0.714570 ( -0.159147 0.159161 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.85925e-08 ( -1.37875e-08 1.42054e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.400 sec. to 9.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03938 ( -0.449046 0.521258 )
Epeak [keV] : 16.3460 ( -9999.35 -9999.36 )
Norm@50keV : 3.62596E-03 ( -0.00149189 0.00746792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.87 using 59 PHA bins.
# Reduced chi-squared = 0.8369 for 56 degrees of freedom
# Null hypothesis probability = 8.026701e-01
Photon flux (15-150 keV) in 1 sec: 0.714183 ( -0.158841 0.15914 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83342e-08 ( -1.35462e-08 1.40579e-08 ) ergs/cm2
Band function
Time interval is from 8.400 sec. to 9.400 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.30152 ( 5.67684 6.30152 )
beta : -1.75830 ( -0.517616 0.447669 )
Epeak [keV] : 121.944 ( -121.944 -121.944 )
Norm@50keV : 0.716053 ( -0.209577 0.189156 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.64 using 59 PHA bins.
# Reduced chi-squared = 0.8662 for 55 degrees of freedom
# Null hypothesis probability = 7.490568e-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] : 13.4294 (-5.47094 8.02145)
R^2/D10^2 : 0.107907 (-0.0829754 0.584942)
(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 4.123e-09 2.205e-09
25- 50 1.470e-08 7.120e-09
50-150 1.707e-08 9.474e-09
15-150 3.589e-08 1.817e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 163.041 (-107.766 -161.426)
Norm : 2.88234 (-0.674418 1.14034)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.346e-09 4.163e-09
25- 50 1.378e-08 7.730e-09
50-150 2.812e-08 1.672e-08
15-150 4.924e-08 2.881e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.22685 (-1.45574 2.73062)
R1^2/D10^2 : 29.2843 (-27.7122 1665.46)
kT2 [keV] : 23.3481 (-8.18462 18.1863)
R2^2/D10^2 : 1.44485E-02 (-0.0120789 0.0412404)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.907e-09 5.590e-09
25- 50 9.337e-09 5.169e-09
50-150 3.155e-08 1.987e-08
15-150 5.080e-08 2.876e-08
Plot creation:
Fri Oct 1 11:02:54 EDT 2021