batgrbproduct Analysis for Trigger=641332
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 May 24 15:01:24 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger641332/GCN5_download_cron
======================================================================
Trigger: 00641332 Segment: 000
BAT Trigger Time: 454063760 [s; MET]
Trigger Stop: 454063824 [s; MET]
UTC: 2015-05-23T08:49:06.382100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 353.475695770042 Dec: -35.9873500211324 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.04
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.04
Flight Position: [ source = BAT ]
RA: 353.475695770042 Dec: -35.9873500211324 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 353.490002936372 Dec: -35.9673022803386 [deg; J2000]
{ 23h 33m 57.6s , -35d 58' 02.3" }
+/- 4.08691790384114 [arcmin] (estimated 90% radius based on SNR)
+/- 2.63585583073334 [arcmin] (formal 1-sigma fit error)
SNR: 4.07094885187764
Angular difference between Flight and Ground position is 1.389053 arcmin
Partial Coding Fraction: 0.7109375 [ 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 0.204596 0.179986 0.082433 -0.033914
0.059710 0.062772 0.057788 0.058388 [error]
Peak 0.204596 0.179986 0.082433 -0.033914
0.059710 0.062772 0.057788 0.058388 [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 6.12e-08 7.88e-08 7.41e-08 1.23e-07 2.55e-07 3.37e-07 erg/cm2
Error 2.72e-08 2.98e-08 4.95e-08 1.84e-07 1.17e-07 2.34e-07 erg/cm2
Peak flux Power-law 3.12e-02 2.22e-02 1.05e-02 6.92e-03 6.72e-02 7.08e-02 ph/cm2/s
Error 1.41e-02 8.22e-03 6.77e-03 9.56e-03 2.38e-02 2.60e-02 ph/cm2/s
Fluence Cutoff-PL 6.01e-08 8.90e-08 5.88e-08 1.62e-08 2.19e-07 2.32e-07 erg/cm2
Error 2.88e-08 4.09e-08 6.26e-08 1.71e-07 1.30e-07 2.42e-07 erg/cm2
Peak flux Cutoff-PL 3.03e-02 2.51e-02 8.64e-03 1.15e-03 6.51e-02 6.52e-02 ph/cm2/s
Error 1.50e-02 1.15e-02 8.75e-03 8.94e-03 2.40e-02 2.68e-02 ph/cm2/s
Fluence Band 6.31e-08 8.78e-08 5.72e-08 5.76e-08 2.33e-07 2.66e-07 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 2.088 0.718 - - 4.30e-04 2.15e-04 74.210 57
CPL 1.017 1.050 32.1 0.0 2.12e-03 0.00e+00 73.860 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.088 0.718 - - 4.30e-04 2.15e-04 74.210 57
CPL 1.017 1.050 32.1 0.0 2.12e-03 0.00e+00 73.860 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
353.4900 -35.9673 0.0472 33.8 -174.1 0.5167 4.1 TRIG_00641332
------------------------------------------
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: 2.08790 ( -0.640306 0.794962 )
Norm@50keV : 4.29966E-04 ( -0.000218413 0.000211608 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.21 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.248217e-02
Photon flux (15-150 keV) in 64 sec: 6.72435E-02 ( -0.0238097 0.023838 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55382e-07 ( -1.10573e-07 1.24058e-07 ) 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: 1.01679 ( -0.99473 1.10466 )
Epeak [keV] : 32.0569 ( )
Norm@50keV : 2.11543E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.86 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 56 degrees of freedom
# Null hypothesis probability = 5.510760e-02
Photon flux (15-150 keV) in 64 sec: 6.50812E-02 ( -0.0236672 0.0243104 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19268e-07 ( -1.09341e-07 1.51013e-07 ) 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 : -1.21568 ( -4.11657 6.31266 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 32.5145 ( -19.4 -32.3875 )
Norm@50keV : 1.54133E-03 ( -0.0015464 14.5859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.88 using 59 PHA bins.
# Reduced chi-squared = 1.343 for 55 degrees of freedom
# Null hypothesis probability = 4.558921e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32562e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.65680 (-2.54529 4.28448)
R^2/D10^2 : 8.98951E-02 (-0.0898707 0.37018)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.49 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 57 degrees of freedom
# Null hypothesis probability = 5.983625e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.892e-08 3.680e-08
25- 50 9.543e-08 6.019e-08
50-150 2.164e-08 1.813e-08
15-150 1.760e-07 1.113e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 48.6428 (-29.8388 -48.6426)
Norm : 0.390435 (-0.183446 0.431407)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.88 using 59 PHA bins.
# Reduced chi-squared = 1.296 for 57 degrees of freedom
# Null hypothesis probability = 6.577438e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.070e-08 3.738e-08
25- 50 8.632e-08 5.322e-08
50-150 8.164e-08 6.346e-08
15-150 2.287e-07 1.471e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.05047 (-5.74838 4.78036)
R1^2/D10^2 : 0.189669 ( )
kT2 [keV] : 23.1543 (-24.1059 -24.1059)
R2^2/D10^2 : 6.76067E-04 (-0.000584146 0.0203681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.25 using 59 PHA bins.
#Fit statistic : Chi-Squared = 73.19 using 59 PHA bins.
# Reduced chi-squared = 1.332 for 55 degrees of freedom
# Reduced chi-squared = 1.331 for 55 degrees of freedom
# Null hypothesis probability = 5.053474e-02
# Null hypothesis probability = 5.099704e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.442e-08 4.550e-08
25- 50 8.417e-08 4.784e-08
50-150 8.532e-08 6.333e-08
15-150 2.339e-07 1.203e-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: 2.08790 ( -0.640306 0.794962 )
Norm@50keV : 4.29966E-04 ( -0.000218413 0.000211608 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.21 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.248217e-02
Photon flux (15-150 keV) in 64 sec: 6.72435E-02 ( -0.0238097 0.023838 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55382e-07 ( -1.10573e-07 1.24058e-07 ) 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: 1.01679 ( -0.99473 1.10466 )
Epeak [keV] : 32.0569 ( )
Norm@50keV : 2.11543E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.86 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 56 degrees of freedom
# Null hypothesis probability = 5.510760e-02
Photon flux (15-150 keV) in 64 sec: 6.50812E-02 ( -0.0236672 0.0243104 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19268e-07 ( -1.09341e-07 1.51013e-07 ) 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 : -0.993199 ( -0.315316 6.48982 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 31.9687 ( -21.8751 -31.9687 )
Norm@50keV : 2.20474E-03 ( -0.00220474 25.0643 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.86 using 59 PHA bins.
# Reduced chi-squared = 1.343 for 55 degrees of freedom
# Null hypothesis probability = 4.569886e-02
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.32562e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.65680 (-2.54529 4.28448)
R^2/D10^2 : 8.98951E-02 (-0.0898707 0.37018)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.49 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 57 degrees of freedom
# Null hypothesis probability = 5.983625e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.892e-08 3.661e-08
25- 50 9.543e-08 6.413e-08
50-150 2.164e-08 1.819e-08
15-150 1.760e-07 1.109e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 48.6428 (-29.8388 -48.6426)
Norm : 0.390435 (-0.183446 0.431407)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.88 using 59 PHA bins.
# Reduced chi-squared = 1.296 for 57 degrees of freedom
# Null hypothesis probability = 6.577438e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.070e-08 3.808e-08
25- 50 8.632e-08 5.338e-08
50-150 8.164e-08 6.749e-08
15-150 2.287e-07 1.568e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.05047 (-5.74838 4.78036)
R1^2/D10^2 : 0.189669 ( )
kT2 [keV] : 23.1543 (-24.1059 -24.1059)
R2^2/D10^2 : 6.76067E-04 (-0.000584146 0.0203681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.25 using 59 PHA bins.
#Fit statistic : Chi-Squared = 73.19 using 59 PHA bins.
# Reduced chi-squared = 1.332 for 55 degrees of freedom
# Reduced chi-squared = 1.331 for 55 degrees of freedom
# Null hypothesis probability = 5.053474e-02
# Null hypothesis probability = 5.099704e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.442e-08 4.189e-08
25- 50 8.417e-08 4.778e-08
50-150 8.532e-08 6.374e-08
15-150 2.339e-07 1.300e-07
Plot creation:
Sun May 24 15:06:02 EDT 2015