batgrbproduct Analysis for Trigger=710022
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Aug 28 12:34:04 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger710022/GCN5_download_cron
======================================================================
Trigger: 00710022 Segment: 000
BAT Trigger Time: 493976216 [s; MET]
Trigger Stop: 493976560 [s; MET]
UTC: 2016-08-27T07:36:39.228960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 270.759892663473 Dec: -20.2484847422294 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.88
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.88
Flight Position: [ source = BAT ]
RA: 270.759892663473 Dec: -20.2484847422294 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 270.577129072977 Dec: -20.4301303380382 [deg; J2000]
{ 18h 02m 18.5s , -20d 25' 48.5" }
+/- 3.92265640204133 [arcmin] (estimated 90% radius based on SNR)
+/- 2.86595272548077 [arcmin] (formal 1-sigma fit error)
SNR: 4.31664732506416
Angular difference between Flight and Ground position is 14.983457 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
T50: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 344 second)
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.457601 0.475665 0.006035 0.191389
0.128573 0.115592 0.096704 0.083537 [error]
Peak 0.457601 0.475665 0.006035 0.191389
0.128573 0.115592 0.096704 0.083537 [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 1.46e-07 1.31e-07 8.13e-08 7.68e-08 3.91e-07 4.35e-07 erg/cm2
Error 5.30e-08 5.48e-08 6.64e-08 1.34e-07 1.67e-07 2.40e-07 erg/cm2
Peak flux Power-law 1.40e-02 7.06e-03 2.19e-03 8.65e-04 2.38e-02 2.41e-02 ph/cm2/s
Error 5.20e-03 2.83e-03 1.73e-03 1.39e-03 7.75e-03 7.98e-03 ph/cm2/s
Fluence Cutoff-PL 1.44e-07 1.58e-07 2.84e-08 3.31e-10 3.31e-07 3.31e-07 erg/cm2
Error 5.96e-08 7.51e-08 6.71e-08 9.58e-08 1.50e-07 2.25e-07 erg/cm2
Peak flux Cutoff-PL 1.35e-02 8.66e-03 8.64e-04 5.51e-06 2.30e-02 2.30e-02 ph/cm2/s
Error 5.85e-03 3.93e-03 1.78e-03 1.02e-03 7.45e-03 7.45e-03 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 2.690 0.785 - - 1.07e-04 6.52e-05 53.460 57
CPL 0.265 0.000 21.7 0.0 5.13e-03 0.00e+00 52.180 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.690 0.785 - - 1.07e-04 6.52e-05 53.460 57
CPL 0.265 0.000 21.7 0.0 5.13e-03 0.00e+00 52.180 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 344.000 0.000 344.000
T90 344.000 0.000 344.000
T50 344.000 0.000 344.000
Peak 344.000 0.000 344.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
270.5771 -20.4301 0.0445 6.1 12.2 1.3278 4.3 TRIG_00710022
------------------------------------------
Foreground time interval of the image:
0.000 344.000 (delta_t = 344.000 [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 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.68972 ( -0.669065 0.899985 )
Norm@50keV : 1.07153E-04 ( -6.23324e-05 6.81611e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.46 using 59 PHA bins.
# Reduced chi-squared = 0.9379 for 57 degrees of freedom
# Null hypothesis probability = 6.085957e-01
Photon flux (15-150 keV) in 344 sec: 2.37527E-02 ( -0.00773446 0.00776376 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.90726e-07 ( -1.55655e-07 1.78817e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.264706 ( )
Epeak [keV] : 21.6704 ( )
Norm@50keV : 5.13174E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9317 for 56 degrees of freedom
# Null hypothesis probability = 6.203480e-01
Photon flux (15-150 keV) in 344 sec: 2.30191E-02 ( -0.0073975 0.0074933 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30593e-07 ( -1.16184e-07 1.84403e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.17548 ( 1.0446 1.0446 )
beta : -10.0000 ( 9.99987 0.000449536 )
Epeak [keV] : 24.3869 ( -12.6547 12.3775 )
Norm@50keV : 5.24940E-02 ( -0.016497 12.3075 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.14 using 59 PHA bins.
# Reduced chi-squared = 0.9480 for 55 degrees of freedom
# Null hypothesis probability = 5.844918e-01
Photon flux (15-150 keV) in 344 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] : 6.41330 (-1.77914 2.28651)
R^2/D10^2 : 6.83143E-02 (-0.0683143 0.211395)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.20 using 59 PHA bins.
# Reduced chi-squared = 0.9157 for 57 degrees of freedom
# Null hypothesis probability = 6.555257e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.405e-07 8.194e-08
25- 50 1.614e-07 1.019e-07
50-150 1.927e-08 1.700e-08
15-150 3.211e-07 2.042e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.3029 (-11.2957 28.3381)
Norm : 0.246547 (-0.128102 0.304716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9212 for 57 degrees of freedom
# Null hypothesis probability = 6.440369e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.481e-07 8.772e-08
25- 50 1.449e-07 9.297e-08
50-150 5.546e-08 4.826e-08
15-150 3.485e-07 2.236e-07
Double BB
R1^2/D10^2 : 8.28768E-07 (-8.28821e-07 -8.28821e-07)
kT2 [keV] : 6.26519 (-1.72027 2.29197)
R2^2/D10^2 : 7.43041E-02 (-0.0546014 0.242412)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.06 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.94 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.92 using 59 PHA bins.
# Reduced chi-squared = 0.9465 for 55 degrees of freedom
# Reduced chi-squared = 0.9443 for 55 degrees of freedom
# Reduced chi-squared = 0.9440 for 55 degrees of freedom
# Null hypothesis probability = 5.876669e-01
# Null hypothesis probability = 5.924040e-01
# Null hypothesis probability = 5.930203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.426e-07 8.839e-08
25- 50 1.599e-07 1.031e-07
50-150 2.718e-08 1.913e-08
15-150 3.297e-07 2.202e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.68972 ( -0.669065 0.899985 )
Norm@50keV : 1.07153E-04 ( -6.23324e-05 6.81611e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.46 using 59 PHA bins.
# Reduced chi-squared = 0.9379 for 57 degrees of freedom
# Null hypothesis probability = 6.085957e-01
Photon flux (15-150 keV) in 344 sec: 2.37527E-02 ( -0.00773446 0.00776376 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.90726e-07 ( -1.55655e-07 1.78817e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.264706 ( )
Epeak [keV] : 21.6704 ( )
Norm@50keV : 5.13174E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9317 for 56 degrees of freedom
# Null hypothesis probability = 6.203480e-01
Photon flux (15-150 keV) in 344 sec: 2.30191E-02 ( -0.0073975 0.0074933 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30593e-07 ( -1.16184e-07 1.84403e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.17548 ( 1.0446 1.0446 )
beta : -10.0000 ( 9.99987 0.000132845 )
Epeak [keV] : 24.3869 ( -12.6547 12.3775 )
Norm@50keV : 5.24940E-02 ( -0.016497 12.3075 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.14 using 59 PHA bins.
# Reduced chi-squared = 0.9480 for 55 degrees of freedom
# Null hypothesis probability = 5.844918e-01
Photon flux (15-150 keV) in 344 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] : 6.41330 (-1.77914 2.28651)
R^2/D10^2 : 6.83143E-02 (-0.0683143 0.211395)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.20 using 59 PHA bins.
# Reduced chi-squared = 0.9157 for 57 degrees of freedom
# Null hypothesis probability = 6.555257e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.405e-07 8.629e-08
25- 50 1.614e-07 1.019e-07
50-150 1.927e-08 1.638e-08
15-150 3.211e-07 1.949e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.3029 (-11.2957 28.3381)
Norm : 0.246547 (-0.128102 0.304716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9212 for 57 degrees of freedom
# Null hypothesis probability = 6.440369e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.481e-07 8.343e-08
25- 50 1.449e-07 9.095e-08
50-150 5.546e-08 5.120e-08
15-150 3.485e-07 2.171e-07
Double BB
R1^2/D10^2 : 8.28768E-07 (-8.28821e-07 -8.28821e-07)
kT2 [keV] : 6.26519 (-1.72027 2.29197)
R2^2/D10^2 : 7.43041E-02 (-0.0546014 0.242412)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.06 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.94 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.92 using 59 PHA bins.
# Reduced chi-squared = 0.9465 for 55 degrees of freedom
# Reduced chi-squared = 0.9443 for 55 degrees of freedom
# Reduced chi-squared = 0.9440 for 55 degrees of freedom
# Null hypothesis probability = 5.876669e-01
# Null hypothesis probability = 5.924040e-01
# Null hypothesis probability = 5.930203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.426e-07 8.382e-08
25- 50 1.599e-07 1.015e-07
50-150 2.718e-08 2.186e-08
15-150 3.297e-07 2.028e-07
Plot creation:
Sun Aug 28 12:38:47 EDT 2016