batgrbproduct Analysis for Trigger=557674
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): Sat Jun 8 19:36:01 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557674/GCN5_download_cron
======================================================================
Trigger: 00557674 Segment: 000
BAT Trigger Time: 392343408 [s; MET]
Trigger Stop: 392344176 [s; MET]
UTC: 2013-06-08T00:16:37.351800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 256.063661464133 Dec: -37.4569768216321 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 17.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.16
Flight Position: [ source = BAT ]
RA: 256.063661464133 Dec: -37.4569768216321 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 256.063795511846 Dec: -37.4519332085093 [deg; J2000]
{ 17h 04m 15.3s , -37d 27' 07.0" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 182.163191617933 [arcmin] (formal 1-sigma fit error)
SNR: -0.189553808311187
Angular difference between Flight and Ground position is 0.302684 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 768 +/-
Measured from: 0
to: 768 [s; relative to TRIGTIME]
T50: 768 +/-
Measured from: 0
to: 768 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 768 second)
Measured from: 0
to: 768 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.523268 -0.319106 -0.132027 -0.104420
0.199211 0.188216 0.171217 0.177223 [error]
Peak 0.523268 -0.319106 -0.132027 -0.104420
0.199211 0.188216 0.171217 0.177223 [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 6.40e-08 1.79e-08 2.70e-09 4.65e-10 8.50e-08 0.00e+00 erg/cm2
Error 7.14e-08 4.04e-08 4.08e-08 1.72e-06 1.21e-07 0.00e+00 erg/cm2
Peak flux Power-law 0.00e+00 2.86e-03 4.64e-04 3.50e-05 2.83e-06 3.38e-03 ph/cm2/s
Error 9.83e-04 4.29e-04 8.87e-03 3.99e-03 1.49e-02 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 6.43e-08 1.64e-08 1.62e-08 1.01e-12 9.04e-13 erg/cm2
Error 0.00e+00 3.67e-07 1.08e-07 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 5.12e-03 3.94e-04 7.49e-09 6.92e-21 5.51e-03 0.00e+00 ph/cm2/s
Error 4.05e-03 5.54e-04 5.62e-05 0.00e+00 4.41e-03 0.00e+00 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 1.500 0.000 - - 0.00e+00 2.25e-05 71.660 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 0.00e+00 71.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 0.000 - - 0.00e+00 2.25e-05 71.660 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 0.00e+00 71.660 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 768.000 0.000 768.000
T90 768.000 0.000 768.000
T50 768.000 0.000 768.000
Peak 768.000 0.000 768.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.0638 -37.4519 1.0105 8.8 83.7 -0.1315 -0.2 TRIG_00557674
------------------------------------------
Foreground time interval of the image:
0.000 768.000 (delta_t = 768.000 [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 768.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 4.50931e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.155875e-02
Photon flux (15-150 keV) in 768 sec: 3.37686E-03 ( -0.00337686 0.00460079 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49976e-08 ( -8.49976e-08 1.56732e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 56 degrees of freedom
# Null hypothesis probability = 7.751167e-02
Photon flux (15-150 keV) in 768 sec: 5.51485E-03 ( -0.00436845 0.00445687 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 7.34008e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.10527 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 13.7396 ( -80 -80 )
Norm@50keV : 10.5528 ( -11.2391 695.387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.35 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.065919e-01
Photon flux (15-150 keV) in 768 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] : 3.13124 (-3.11632 3.14278)
R^2/D10^2 : 0.490679 (-0.514376 167.147)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.406277e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.147e-08 5.898e-08
25- 50 1.544e-08 1.197e-08
50-150 3.495e-11 4.044e-11
15-150 1.069e-07 7.837e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.07104 (-6.10339 -6.10339)
Norm : 0.477323 (-0.46735 -0.46735)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.11 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 57 degrees of freedom
# Null hypothesis probability = 1.304874e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.870e-08 5.257e-08
25- 50 1.498e-08 1.114e-08
50-150 1.897e-10 2.713e-10
15-150 9.388e-08 5.633e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.10577 (-3.1007 3.17285)
R1^2/D10^2 : 0.516892 (-0.523892 163.395)
kT2 [keV] : 0.145302 (-0.145302 -0.145302)
R2^2/D10^2 : 9.98027E-04 (-0.000999681 -0.000999681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 55 degrees of freedom
# Null hypothesis probability = 1.036659e-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 768.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -1.5 -1.5 )
Norm@50keV : 0.0 ( 0 4.50931e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 57 degrees of freedom
# Null hypothesis probability = 9.155875e-02
Photon flux (15-150 keV) in 768 sec: 3.37686E-03 ( -0.00337686 0.00460079 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49976e-08 ( -8.49976e-08 1.56732e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 0.0 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.66 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 56 degrees of freedom
# Null hypothesis probability = 7.751167e-02
Photon flux (15-150 keV) in 768 sec: 5.51485E-03 ( -0.00436845 0.00445687 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 7.34008e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 768.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.10527 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 13.7396 ( -80 -80 )
Norm@50keV : 10.5528 ( -11.2391 695.387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.35 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 55 degrees of freedom
# Null hypothesis probability = 1.065919e-01
Photon flux (15-150 keV) in 768 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] : 3.13124 (-3.11632 3.14278)
R^2/D10^2 : 0.490679 (-0.514376 167.147)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.406277e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.147e-08 6.351e-08
25- 50 1.544e-08 1.268e-08
50-150 3.495e-11 7.972e-11
15-150 1.069e-07 7.780e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.07104 (-6.10339 -6.10339)
Norm : 0.477323 (-0.46735 -0.46735)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.11 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 57 degrees of freedom
# Null hypothesis probability = 1.304874e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.870e-08 5.556e-08
25- 50 1.498e-08 1.441e-08
50-150 1.897e-10 1.907e-10
15-150 9.388e-08 6.086e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.10577 (-3.1007 3.17285)
R1^2/D10^2 : 0.516892 (-0.523892 163.395)
kT2 [keV] : 0.145302 (-0.145302 -0.145302)
R2^2/D10^2 : 9.98027E-04 (-0.000999681 -0.000999681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.55 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 55 degrees of freedom
# Null hypothesis probability = 1.036659e-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:
Sat Jun 8 19:54:13 EDT 2013