batgrbproduct Analysis for Trigger=599860
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 25 07:19:32 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger599860/GCN5_download_cron
======================================================================
Trigger: 00599860 Segment: 000
BAT Trigger Time: 422630760 [s; MET]
Trigger Stop: 422630824 [s; MET]
UTC: 2014-05-24T13:25:47.949080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 53.405124688329 Dec: -36.0963504806705 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.08
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.08
Flight Position: [ source = BAT ]
RA: 53.405124688329 Dec: -36.0963504806705 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 53.5048719680825 Dec: -36.1169237713975 [deg; J2000]
{ 03h 34m 01.2s , -36d 07' 00.9" }
+/- 4.63305078656222 [arcmin] (estimated 90% radius based on SNR)
+/- 3.04586949392169 [arcmin] (formal 1-sigma fit error)
SNR: 3.40313926273534
Angular difference between Flight and Ground position is 4.990357 arcmin
Partial Coding Fraction: 0.8671875 [ 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 0.086719 0.188284 0.073196 -0.023252
0.046335 0.048147 0.042683 0.039079 [error]
Peak 0.086719 0.188284 0.073196 -0.023252
0.046335 0.048147 0.042683 0.039079 [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 3.49e-08 5.56e-08 6.64e-08 1.55e-07 2.02e-07 3.16e-07 erg/cm2
Error 1.77e-08 2.15e-08 3.54e-08 1.84e-07 8.83e-08 2.03e-07 erg/cm2
Peak flux Power-law 1.78e-02 1.55e-02 9.24e-03 8.32e-03 4.60e-02 5.06e-02 ph/cm2/s
Error 9.12e-03 6.01e-03 4.80e-03 9.31e-03 1.79e-02 2.01e-02 ph/cm2/s
Fluence Cutoff-PL 7.84e-09 9.71e-08 4.96e-08 1.13e-10 1.57e-07 1.54e-07 erg/cm2
Error 1.86e-08 3.43e-08 3.91e-08 8.52e-09 6.37e-08 6.33e-08 erg/cm2
Peak flux Cutoff-PL 3.18e-03 2.52e-02 8.16e-03 1.06e-05 3.67e-02 3.78e-02 ph/cm2/s
Error 9.21e-03 9.46e-03 5.70e-03 6.91e-04 1.66e-02 1.66e-02 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.723 0.578 - - 3.44e-04 1.46e-04 60.850 57
CPL -9.999 0.000 45.0 8.9 4.67e+02 0.00e+00 52.370 56
The chi2 of BB fit is 53.88 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.723 0.578 - - 3.44e-04 1.46e-04 60.850 57
CPL -9.999 0.000 45.0 8.9 4.67e+02 0.00e+00 52.370 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
53.5049 -36.1169 0.0564 25.6 3.8 0.3392 3.4 TRIG_00599860
------------------------------------------
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: 1.72264 ( -0.563555 0.591989 )
Norm@50keV : 3.43828E-04 ( -0.000148206 0.000144579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.85 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 57 degrees of freedom
# Null hypothesis probability = 3.389416e-01
Photon flux (15-150 keV) in 64 sec: 4.60469E-02 ( -0.0178702 0.0178737 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01695e-07 ( -8.44122e-08 9.20992e-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: -9.99863 ( )
Epeak [keV] : 44.9872 ( -7.87316 9.95922 )
Norm@50keV : 466.821 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.37 using 59 PHA bins.
# Reduced chi-squared = 0.9351 for 56 degrees of freedom
# Null hypothesis probability = 6.131525e-01
Photon flux (15-150 keV) in 64 sec: 3.67460E-02 ( -0.0123182 0.0208741 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57389e-07 ( -5.46362e-08 7.28378e-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 ( -4.56632 -4.9279 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 44.6541 ( -7.89874 9.12105 )
Norm@50keV : 1.65961 ( -0.53266 4.21373 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.58 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 55 degrees of freedom
# Null hypothesis probability = 5.676396e-01
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] : 11.6741 (-2.7387 3.71211)
R^2/D10^2 : 1.51336E-02 (-0.0151149 0.0249822)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.88 using 59 PHA bins.
# Reduced chi-squared = 0.9452 for 57 degrees of freedom
# Null hypothesis probability = 5.929991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.784e-08 1.758e-08
25- 50 8.479e-08 5.094e-08
50-150 6.819e-08 5.008e-08
15-150 1.808e-07 1.150e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.5253 (-49.5079 -84.1615)
Norm : 0.227853 (-0.0930249 0.135555)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.03 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 4.013549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.783e-08 2.384e-08
25- 50 6.218e-08 3.981e-08
50-150 8.742e-08 8.243e-08
15-150 1.874e-07 1.438e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.120920 (-0.12092 -0.12092)
R1^2/D10^2 : 8.18345E-02 (-0.0818345 -0.0818345)
kT2 [keV] : 11.6797 (-2.73649 3.71429)
R2^2/D10^2 : 1.51084E-02 (-0.0151126 0.0249845)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.88 using 59 PHA bins.
# Reduced chi-squared = 0.9796 for 55 degrees of freedom
# Null hypothesis probability = 5.175941e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 1.72264 ( -0.563555 0.591989 )
Norm@50keV : 3.43828E-04 ( -0.000148206 0.000144579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.85 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 57 degrees of freedom
# Null hypothesis probability = 3.389416e-01
Photon flux (15-150 keV) in 64 sec: 4.60469E-02 ( -0.0178702 0.0178737 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01695e-07 ( -8.44122e-08 9.20992e-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: -9.99863 ( )
Epeak [keV] : 44.9872 ( -7.87316 9.95922 )
Norm@50keV : 466.821 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.37 using 59 PHA bins.
# Reduced chi-squared = 0.9351 for 56 degrees of freedom
# Null hypothesis probability = 6.131525e-01
Photon flux (15-150 keV) in 64 sec: 3.67460E-02 ( -0.0123182 0.0208741 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57389e-07 ( -5.46362e-08 7.28378e-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 ( -4.56632 -4.9279 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 44.6541 ( -7.89874 9.12105 )
Norm@50keV : 1.65961 ( -0.53266 4.21373 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.58 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 55 degrees of freedom
# Null hypothesis probability = 5.676396e-01
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] : 11.6741 (-2.7387 3.71211)
R^2/D10^2 : 1.51336E-02 (-0.0151149 0.0249822)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.88 using 59 PHA bins.
# Reduced chi-squared = 0.9452 for 57 degrees of freedom
# Null hypothesis probability = 5.929991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.784e-08 1.746e-08
25- 50 8.479e-08 5.136e-08
50-150 6.819e-08 5.162e-08
15-150 1.808e-07 1.129e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.5253 (-49.5079 -84.1615)
Norm : 0.227853 (-0.0930249 0.135555)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.03 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 4.013549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.783e-08 2.353e-08
25- 50 6.218e-08 3.952e-08
50-150 8.742e-08 7.856e-08
15-150 1.874e-07 1.358e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.120920 (-0.12092 -0.12092)
R1^2/D10^2 : 8.18345E-02 (-0.0818345 -0.0818345)
kT2 [keV] : 11.6797 (-2.73649 3.71429)
R2^2/D10^2 : 1.51084E-02 (-0.0151126 0.0249845)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.88 using 59 PHA bins.
# Reduced chi-squared = 0.9796 for 55 degrees of freedom
# Null hypothesis probability = 5.175941e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun May 25 07:23:40 EDT 2014