batgrbproduct Analysis for Trigger=650413
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): Mon Jul 27 21:52:14 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger650413/GCN5_download_cron
======================================================================
Trigger: 00650413 Segment: 000
BAT Trigger Time: 459655960 [s; MET]
Trigger Stop: 459656024 [s; MET]
UTC: 2015-07-27T02:12:25.091300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 54.4192371141044 Dec: 53.2844131817431 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 20.89
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 20.89
Flight Position: [ source = BAT ]
RA: 54.4192371141044 Dec: 53.2844131817431 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 54.4337534973041 Dec: 53.2827296809894 [deg; J2000]
{ 03h 37m 44.1s , +53d 16' 57.8" }
+/- 1.02455054228227 [arcmin] (estimated 90% radius based on SNR)
+/- 0.437503813537586 [arcmin] (formal 1-sigma fit error)
SNR: 29.3812780754727
Angular difference between Flight and Ground position is 0.530428 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.930569 0.395441 -0.001529 0.025790
0.044624 0.042310 0.035541 0.030163 [error]
Peak 1.930569 0.395441 -0.001529 0.025790
0.044624 0.042310 0.035541 0.030163 [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 5.39e-07 1.47e-07 2.14e-08 3.55e-09 7.10e-07 7.11e-07 erg/cm2
Error 5.38e-08 2.35e-08 8.50e-09 2.48e-09 5.79e-08 5.80e-08 erg/cm2
Peak flux Power-law 2.91e-01 4.58e-02 3.34e-03 2.60e-04 3.40e-01 3.40e-01 ph/cm2/s
Error 3.02e-02 6.89e-03 1.28e-03 1.74e-04 3.00e-02 3.00e-02 ph/cm2/s
Fluence Cutoff-PL 5.40e-07 1.46e-07 2.10e-08 3.42e-09 7.10e-07 7.11e-07 erg/cm2
Error 5.38e-08 -------- 1.56e-08 3.36e-09 5.85e-08 5.80e-08 erg/cm2
Peak flux Cutoff-PL 2.91e-01 4.55e-02 3.25e-03 2.51e-04 3.40e-01 3.40e-01 ph/cm2/s
Error 3.02e-02 -------- -------- -------- -------- 3.00e-02 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 4.777 0.353 - - 2.72e-04 8.41e-05 90.810 57
CPL 1.000 0.000 50.0 0.0 2.93e-03 0.00e+00 323.880 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.777 0.353 - - 2.72e-04 8.41e-05 90.810 57
CPL 1.000 0.000 50.0 0.0 2.93e-03 0.00e+00 323.880 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
54.4338 +53.2827 0.0065 0.1 -146.9 2.3698 29.4 TRIG_00650413
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.77744 ( -0.347866 0.35774 )
Norm@50keV : 2.71886E-04 ( -7.49876e-05 9.31955e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.81 using 59 PHA bins.
# Reduced chi-squared = 1.593 for 57 degrees of freedom
# Null hypothesis probability = 2.936398e-03
Photon flux (15-150 keV) in 64 sec: 0.339803 ( -0.0299553 0.0301407 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09683e-07 ( -5.79197e-08 5.79224e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.92714E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 323.88 using 59 PHA bins.
# Reduced chi-squared = 5.7836 for 56 degrees of freedom
# Null hypothesis probability = 2.310741e-39
Photon flux (15-150 keV) in 64 sec: 0.339901 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09504e-07 ( -5.91616e-08 5.78816e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -0.128748 -5 )
beta : -5.22130 ( -0.772426 0.525839 )
Epeak [keV] : 13.2915 ( -2.59456 1.28707 )
Norm@50keV : 8.67353E+04 ( -7015.71 582063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.55 using 59 PHA bins.
# Reduced chi-squared = 1.592 for 55 degrees of freedom
# Null hypothesis probability = 3.431604e-03
Photon flux (15-150 keV) in 64 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] : 2.97737 (-0.22715 0.271562)
R^2/D10^2 : 49.6402 (-22.711 38.7587)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 107.25 using 59 PHA bins.
# Reduced chi-squared = 1.8815 for 57 degrees of freedom
# Null hypothesis probability = 6.420688e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.666e-07 9.264e-08
25- 50 8.042e-08 1.845e-08
50-150 1.218e-10 7.968e-11
15-150 6.471e-07 1.008e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.32192 (-0.832741 1.1141)
Norm : 35.4019 (-14.1729 22.4927)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 99.69 using 59 PHA bins.
# Reduced chi-squared = 1.749 for 57 degrees of freedom
# Null hypothesis probability = 4.050864e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.458e-07 7.590e-08
25- 50 1.124e-07 2.221e-08
50-150 1.681e-09 9.258e-10
15-150 6.599e-07 7.875e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.42004 (-0.241007 0.265694)
R1^2/D10^2 : 179.768 (-89.7453 206.296)
kT2 [keV] : 7.78754 (-1.5687 2.13441)
R2^2/D10^2 : 0.107060 (-0.0719873 0.223347)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.36 using 59 PHA bins.
# Reduced chi-squared = 1.443 for 55 degrees of freedom
# Null hypothesis probability = 1.745035e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.703e-07 2.691e-07
25- 50 1.548e-07 7.132e-08
50-150 2.951e-08 2.103e-08
15-150 7.546e-07 2.683e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.77744 ( -0.347866 0.35774 )
Norm@50keV : 2.71886E-04 ( -7.49876e-05 9.31955e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.81 using 59 PHA bins.
# Reduced chi-squared = 1.593 for 57 degrees of freedom
# Null hypothesis probability = 2.936398e-03
Photon flux (15-150 keV) in 64 sec: 0.339803 ( -0.0299553 0.0301407 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09683e-07 ( -5.79197e-08 5.79224e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.92714E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 323.88 using 59 PHA bins.
# Reduced chi-squared = 5.7836 for 56 degrees of freedom
# Null hypothesis probability = 2.310741e-39
Photon flux (15-150 keV) in 64 sec: 0.339901 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.09504e-07 ( -5.91616e-08 5.78816e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -0.128748 -5 )
beta : -5.22130 ( -0.772426 0.525839 )
Epeak [keV] : 13.2915 ( -2.59456 1.28707 )
Norm@50keV : 8.67353E+04 ( -7015.71 582063 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.55 using 59 PHA bins.
# Reduced chi-squared = 1.592 for 55 degrees of freedom
# Null hypothesis probability = 3.431604e-03
Photon flux (15-150 keV) in 64 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] : 2.97737 (-0.22715 0.271562)
R^2/D10^2 : 49.6402 (-22.711 38.7587)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 107.25 using 59 PHA bins.
# Reduced chi-squared = 1.8815 for 57 degrees of freedom
# Null hypothesis probability = 6.420688e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.666e-07 9.376e-08
25- 50 8.042e-08 1.663e-08
50-150 1.218e-10 7.334e-11
15-150 6.471e-07 1.018e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.32192 (-0.832741 1.1141)
Norm : 35.4019 (-14.1729 22.4927)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 99.69 using 59 PHA bins.
# Reduced chi-squared = 1.749 for 57 degrees of freedom
# Null hypothesis probability = 4.050864e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.458e-07 7.776e-08
25- 50 1.124e-07 2.250e-08
50-150 1.681e-09 9.152e-10
15-150 6.599e-07 8.310e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.42004 (-0.241007 0.265694)
R1^2/D10^2 : 179.768 (-89.7453 206.296)
kT2 [keV] : 7.78754 (-1.5687 2.13441)
R2^2/D10^2 : 0.107060 (-0.0719873 0.223347)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.36 using 59 PHA bins.
# Reduced chi-squared = 1.443 for 55 degrees of freedom
# Null hypothesis probability = 1.745035e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.703e-07 2.248e-07
25- 50 1.548e-07 7.427e-08
50-150 2.951e-08 2.001e-08
15-150 7.546e-07 3.000e-07
Plot creation:
Mon Jul 27 21:54:44 EDT 2015