batgrbproduct Analysis for Trigger=580319
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): Fri Dec 6 10:14:59 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger580319/GCN5_download_cron
======================================================================
Trigger: 00580319 Segment: 000
BAT Trigger Time: 407959112 [s; MET]
Trigger Stop: 407959912 [s; MET]
UTC: 2013-12-05T17:58:20.642600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 274.547410071161 Dec: -13.9457693763322 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 11.65
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.65
Flight Position: [ source = BAT ]
RA: 274.547410071161 Dec: -13.9457693763322 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 274.271023469881 Dec: -13.9883266913377 [deg; J2000]
{ 18h 17m 05.0s , -13d 59' 18.0" }
+/- 7.2521700057524 [arcmin] (estimated 90% radius based on SNR)
+/- 0 [arcmin] (formal 1-sigma fit error)
SNR: 1.79423123911787
Angular difference between Flight and Ground position is 16.294224 arcmin
Partial Coding Fraction: 0.4921875 [ including projection effects ]
Duration
T90: 800 +/-
Measured from: 0
to: 800 [s; relative to TRIGTIME]
T50: 800 +/-
Measured from: 0
to: 800 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 800 second)
Measured from: 0
to: 800 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 800 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.171036 0.467425 0.094098 0.359446
0.224815 0.220598 0.187858 0.164449 [error]
Peak -0.171036 0.467425 0.094098 0.359446
0.224815 0.220598 0.187858 0.164449 [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 5.20e-11 1.06e-09 2.03e-08 4.39e-06 1.20e-07 9.05e-07 erg/cm2
Error 5.93e-08 8.73e-08 1.53e-07 7.02e-06 4.14e-07 0.00e+00 erg/cm2
Peak flux Power-law 2.66e-06 2.58e-05 2.32e-04 1.44e-02 9.26e-04 8.27e-03 ph/cm2/s
Error 2.75e-03 2.19e-03 1.86e-03 2.35e-02 6.56e-03 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 1.93e-08 1.98e-07 6.18e-08 4.33e-11 2.79e-07 2.79e-07 erg/cm2
Error 4.19e-08 1.56e-07 1.22e-07 3.74e-07 1.80e-07 1.80e-07 erg/cm2
Peak flux Cutoff-PL 8.22e-04 4.79e-03 9.22e-04 3.35e-07 6.54e-03 6.56e-03 ph/cm2/s
Error 1.86e-03 3.86e-03 1.65e-03 2.25e-03 4.20e-03 5.88e-03 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 -2.430 0.000 - - 8.04e-07 5.47e-05 60.040 57
CPL -9.506 0.000 41.9 44.7 1.02e+02 3.44e+03 58.260 56
The chi2 of BB fit is 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 -2.430 0.000 - - 8.04e-07 5.47e-05 60.040 57
CPL -9.506 0.000 41.9 44.7 1.02e+02 3.44e+03 58.260 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 800.000 0.000 800.000
T90 800.000 0.000 800.000
T50 800.000 0.000 800.000
Peak 800.000 0.000 800.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.2710 -13.9883 0.0000 28.5 -98.5 1.2852 1.8 TRIG_00580319
------------------------------------------
Foreground time interval of the image:
0.000 84.998 (delta_t = 84.998 [sec])
121.000 124.232 (delta_t = 3.232 [sec])
181.000 800.000 (delta_t = 619.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 84.997500
121.000000 124.231700
181.000000 800.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.42955 ( )
Norm@50keV : 8.03516E-07 ( -8.06515e-07 0.000108577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.04 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 57 degrees of freedom
# Null hypothesis probability = 3.660870e-01
Photon flux (15-150 keV) in 707.2 sec: 9.26397E-04 ( -0.000925835 0.0122028 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19951e-07 ( -1.19951e-07 7.07971e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 84.997500
121.000000 124.231700
181.000000 800.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.50633 ( )
Epeak [keV] : 41.8604 ( -11.8718 77.5436 )
Norm@50keV : 101.542 ( -113.62 6764.49 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.26 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 56 degrees of freedom
# Null hypothesis probability = 3.922416e-01
Photon flux (15-150 keV) in 707.2 sec: 6.53950E-03 ( -0.00317897 0.0052294 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79178e-07 ( -1.31859e-07 2.27213e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 84.997500
121.000000 124.231700
181.000000 800.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -10.0000 ( -5 -5 )
beta : 2.28914 ( -2.06298 -2.06298 )
Epeak [keV] : 72.7855 ( -70.4502 -70.4502 )
Norm@50keV : 1.98472E-04 ( -0.000199183 0.0146272 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.01 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 55 degrees of freedom
# Null hypothesis probability = 2.991915e-01
Photon flux (15-150 keV) in 707.2 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] : 11.7860 (-12.0082 -12.0082)
R^2/D10^2 : 2.06306E-03 (-0.00204331 0.0261966)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.91 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.705297e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.279e-08 2.957e-08
25- 50 1.318e-07 8.589e-08
50-150 1.088e-07 1.136e-07
15-150 2.834e-07 2.512e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.358 (-199.361 -199.361)
Norm : 2.70861E-02 (-0.027086 3.34386)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.56 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 57 degrees of freedom
# Null hypothesis probability = 3.486230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.770e-08 4.010e-08
25- 50 9.175e-08 7.762e-08
50-150 2.012e-07 1.681e-07
15-150 3.407e-07 2.901e-07
Double BB
R1^2/D10^2 : 5.44690E+07 ( )
kT2 [keV] : 12.8254 (-12.5774 -12.5774)
R2^2/D10^2 : 1.38845E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.90 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.70 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.67 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 55 degrees of freedom
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Null hypothesis probability = 3.346518e-01
# Null hypothesis probability = 3.413650e-01
# Null hypothesis probability = 3.423804e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.531e-08 2.894e-08
25- 50 1.189e-07 8.914e-08
50-150 1.170e-07 1.457e-07
15-150 2.812e-07 2.327e-07
Peak spectrum fit
Power-law model
Time interval is from 181.000 sec. to 800.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.42955 ( )
Norm@50keV : 8.03516E-07 ( -8.06515e-07 0.000108577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.04 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 57 degrees of freedom
# Null hypothesis probability = 3.660870e-01
Photon flux (15-150 keV) in 707.2 sec: 9.26397E-04 ( -0.000925835 0.0122028 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19951e-07 ( -1.19951e-07 7.07971e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 181.000 sec. to 800.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.50633 ( )
Epeak [keV] : 41.8604 ( -11.8718 77.5436 )
Norm@50keV : 101.542 ( -113.62 6764.49 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.26 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 56 degrees of freedom
# Null hypothesis probability = 3.922416e-01
Photon flux (15-150 keV) in 707.2 sec: 6.53950E-03 ( -0.00317897 0.0052294 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79178e-07 ( -1.31859e-07 2.27213e-07 ) ergs/cm2
Band function
Time interval is from 181.000 sec. to 800.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -10.0000 ( -5 -5 )
beta : 2.28914 ( -2.06298 -2.06298 )
Epeak [keV] : 72.7855 ( -70.4502 -70.4502 )
Norm@50keV : 1.98472E-04 ( -0.000199183 0.0146272 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.01 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 55 degrees of freedom
# Null hypothesis probability = 2.991915e-01
Photon flux (15-150 keV) in 707.2 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] : 11.7860 (-12.0082 -12.0082)
R^2/D10^2 : 2.06306E-03 (-0.00204331 0.0261966)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.91 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.705297e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.279e-08 3.130e-08
25- 50 1.318e-07 1.030e-07
50-150 1.088e-07 1.272e-07
15-150 2.834e-07 2.423e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.358 (-199.361 -199.361)
Norm : 2.70861E-02 (-0.027086 2.83153)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.56 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 57 degrees of freedom
# Null hypothesis probability = 3.486230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.770e-08 4.176e-08
25- 50 9.175e-08 8.214e-08
50-150 2.012e-07 1.609e-07
15-150 3.407e-07 2.721e-07
Double BB
R1^2/D10^2 : 5.44690E+07 ( )
kT2 [keV] : 12.8254 (-12.5774 -12.5774)
R2^2/D10^2 : 1.38845E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.90 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.70 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.67 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 55 degrees of freedom
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Null hypothesis probability = 3.346518e-01
# Null hypothesis probability = 3.413650e-01
# Null hypothesis probability = 3.423804e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.531e-08 2.733e-08
25- 50 1.189e-07 9.385e-08
50-150 1.170e-07 1.156e-07
15-150 2.812e-07 2.357e-07
Plot creation:
Fri Dec 6 10:36:51 EST 2013