batgrbproduct Analysis for Trigger=559108
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): Thu Jun 27 15:31:31 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger559108/GCN5_download_cron
======================================================================
Trigger: 00559108 Segment: 000
BAT Trigger Time: 393973728 [s; MET]
Trigger Stop: 393974432 [s; MET]
UTC: 2013-06-26T21:08:37.279040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 171.522625095081 Dec: -60.6986578674133 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 12.17
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 12.17
Flight Position: [ source = BAT ]
RA: 171.522625095081 Dec: -60.6986578674133 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 171.013766899708 Dec: -60.8180927145371 [deg; J2000]
{ 11h 24m 03.3s , -60d 49' 05.1" }
+/- 46.779765336303 [arcmin] (estimated 90% radius based on SNR)
+/- 0 [arcmin] (formal 1-sigma fit error)
SNR: 0.125118399858303
Angular difference between Flight and Ground position is 16.546645 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
T50: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 704 second)
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.028115 0.128221 -0.062556 0.031098
0.081465 0.082390 0.071611 0.063770 [error]
Peak -0.028115 0.128221 -0.062556 0.031098
0.081465 0.082390 0.071611 0.063770 [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 5.74e-09 1.05e-08 1.48e-08 4.37e-08 4.24e-08 7.47e-08 erg/cm2
Error 1.63e-08 2.27e-08 3.74e-08 1.40e-06 1.01e-07 1.41e-06 erg/cm2
Peak flux Power-law 1.01e-03 1.02e-03 7.14e-04 7.98e-04 3.06e-03 3.54e-03 ph/cm2/s
Error 2.93e-03 2.20e-03 1.76e-03 1.78e-02 6.56e-03 1.86e-02 ph/cm2/s
Fluence Cutoff-PL 4.13e-09 1.36e-07 1.88e-07 2.95e-09 3.31e-07 3.32e-07 erg/cm2
Error 1.84e-08 8.66e-08 1.34e-07 2.89e-08 1.68e-07 1.68e-07 erg/cm2
Peak flux Cutoff-PL 4.82e-04 4.83e-03 1.92e-03 9.37e-05 7.24e-03 7.25e-03 ph/cm2/s
Error 1.74e-03 4.92e-03 2.38e-03 8.28e-04 6.92e-03 6.91e-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 1.505 0.000 - - 2.45e-05 5.35e-05 63.360 57
CPL -9.995 0.000 47.3 0.0 5.24e+01 0.00e+00 60.190 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 1.505 0.000 - - 2.45e-05 5.35e-05 63.360 57
CPL -9.995 0.000 47.3 0.0 5.24e+01 0.00e+00 60.190 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 704.000 0.000 704.000
T90 704.000 0.000 704.000
T50 704.000 0.000 704.000
Peak 704.000 0.000 704.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
171.0138 -60.8181 0.0000 14.6 -161.9 0.0233 0.1 TRIG_00559108
------------------------------------------
Foreground time interval of the image:
0.000 183.084 (delta_t = 183.084 [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 183.084 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50527 ( -1.50594 -1.50594 )
Norm@50keV : 2.44561E-05 ( -2.44476e-05 8.24845e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.36 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 57 degrees of freedom
# Null hypothesis probability = 2.621794e-01
Photon flux (15-150 keV) in 183.1 sec: 3.05728E-03 ( -0.00305728 0.0100717 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.23975e-08 ( -4.24036e-08 1.59087e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99452 ( )
Epeak [keV] : 47.3494 ( )
Norm@50keV : 52.4248 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.265677e-01
Photon flux (15-150 keV) in 183.1 sec: 7.23692E-03 ( -0.00723692 0.00660508 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30664e-07 ( -1.54853e-07 1.81399e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.084 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -9.37165 ( 9.37167 9.37167 )
Epeak [keV] : 48.1602 ( -48.1138 -48.1138 )
Norm@50keV : 0.176609 ( -0.179215 246862 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.15 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 55 degrees of freedom
# Null hypothesis probability = 2.646091e-01
Photon flux (15-150 keV) in 183.1 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] : 5.00000 (-5 -5)
R^2/D10^2 : 0.0 (0 0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.551141e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.551141e-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
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.104681 (-0.104681 -0.104681)
R1^2/D10^2 : 1.91062E-04 (-0.000191083 -0.000191083)
kT2 [keV] : 12.2610 (-12.2591 -12.2591)
R2^2/D10^2 : 1.71144E-03 (-0.00171246 -0.00171246)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.22 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 55 degrees of freedom
# Null hypothesis probability = 2.347093e-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 183.084 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50527 ( -1.50594 -1.50594 )
Norm@50keV : 2.44561E-05 ( -2.44476e-05 8.24845e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.36 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 57 degrees of freedom
# Null hypothesis probability = 2.621794e-01
Photon flux (15-150 keV) in 183.1 sec: 3.05728E-03 ( -0.00305728 0.0100717 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.23975e-08 ( -4.24036e-08 1.59087e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99452 ( )
Epeak [keV] : 47.3494 ( )
Norm@50keV : 52.4248 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.265677e-01
Photon flux (15-150 keV) in 183.1 sec: 7.23692E-03 ( -0.00723692 0.00660508 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30664e-07 ( -1.54853e-07 1.81399e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.084 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -9.37165 ( 9.37167 9.37167 )
Epeak [keV] : 48.1602 ( -48.1138 -48.1138 )
Norm@50keV : 0.176609 ( -0.179215 246862 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.15 using 59 PHA bins.
# Reduced chi-squared = 1.112 for 55 degrees of freedom
# Null hypothesis probability = 2.646091e-01
Photon flux (15-150 keV) in 183.1 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] : 5.00000 (-5 -5)
R^2/D10^2 : 0.0 (0 0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.551141e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.551141e-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
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.104681 (-0.104681 -0.104681)
R1^2/D10^2 : 1.91062E-04 (-0.000191083 -0.000191083)
kT2 [keV] : 12.2610 (-12.2591 -12.2591)
R2^2/D10^2 : 1.71144E-03 (-0.00171246 -0.00171246)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.22 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 55 degrees of freedom
# Null hypothesis probability = 2.347093e-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:
Thu Jun 27 15:37:09 EDT 2013