batgrbproduct Analysis for Trigger=579683
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 Nov 29 06:33:47 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger579683/GCN5_download_cron
======================================================================
Trigger: 00579683 Segment: 000
BAT Trigger Time: 407343995.904 [s; MET]
Trigger Stop: 407343996.416 [s; MET]
UTC: 2013-11-28T15:06:24.575040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 355.323120755133 Dec: 31.2793393516818 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.17
Image Trigger?: NO
Rate S/N Ratio: 23.3023603954621 [ if not an image trigger ]
Image S/N Ratio: 11.17
Flight Position: [ source = BAT ]
RA: 355.323120755133 Dec: 31.2793393516818 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 355.305358813216 Dec: 31.29281155899 [deg; J2000]
{ 23h 41m 13.3s , +31d 17' 34.1" }
+/- 1.57814641678887 [arcmin] (estimated 90% radius based on SNR)
+/- 0.617785759529346 [arcmin] (formal 1-sigma fit error)
SNR: 15.8507865504416
Angular difference between Flight and Ground position is 1.217727 arcmin
Partial Coding Fraction: 0.4101562 [ including projection effects ]
Duration
T90: 3 +/- 1.4142135623731
Measured from: -0.903999865055084
to: 2.09600013494492 [s; relative to TRIGTIME]
T50: 1 +/- 1
Measured from: 0.0960001349449158
to: 1.09600013494492 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0960000157356262
to: 1.09600001573563 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.903999984264374
to: 2.09600001573563 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.184041 0.190616 0.142322 0.016733
0.017103 0.017947 0.015545 0.012191 [error]
Peak 0.099287 0.116326 0.087221 0.003998
0.010734 0.011518 0.009987 0.007193 [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 5.90e-08 8.97e-08 1.02e-07 2.23e-07 3.17e-07 4.74e-07 erg/cm2
Error 8.59e-09 8.65e-09 1.50e-08 6.57e-08 3.52e-08 8.05e-08 erg/cm2
Peak flux Power-law 1.07e+00 9.05e-01 5.20e-01 4.44e-01 2.69e+00 2.94e+00 ph/cm2/s
Error 1.67e-01 9.70e-02 7.70e-02 1.23e-01 2.89e-01 3.14e-01 ph/cm2/s
Fluence Cutoff-PL 5.34e-08 9.70e-08 1.06e-07 8.83e-08 3.04e-07 3.45e-07 erg/cm2
Error 1.03e-08 1.11e-08 1.67e-08 8.58e-08 3.69e-08 9.31e-08 erg/cm2
Peak flux Cutoff-PL 8.22e-01 1.07e+00 5.90e-01 1.19e-01 2.58e+00 2.60e+00 ph/cm2/s
Error 2.12e-01 1.29e-01 9.69e-02 8.49e-02 2.98e-01 3.10e-01 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 2.60e+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 1.811 0.170 - - 1.15e-02 1.25e-03 64.330 57
CPL 1.112 0.713 60.9 75.2 2.67e-02 2.67e-02 60.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.800 0.171 - - 1.95e-02 2.30e-03 63.450 57
CPL 0.146 0.964 54.4 9.5 1.41e-01 2.13e-01 51.090 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: 1.984000 sec.
T50 in the 50-300 keV band: 0.896000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 3.000 -0.904 2.096
T90 3.000 -0.904 2.096
T50 1.000 0.096 1.096
Peak 1.000 0.096 1.096
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
355.3054 +31.2928 0.0121 33.8 -117.9 0.5353 15.9 TRIG_00579683
------------------------------------------
Foreground time interval of the image:
-0.904 2.096 (delta_t = 3.000 [sec])
Background time interval of the image:
-239.904 -232.264 (delta_t = 7.640 [sec])
-230.904 -0.904 (delta_t = 230.000 [sec])
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 -0.904 sec. to 2.096 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81087 ( -0.166823 0.173649 )
Norm@50keV : 1.14941E-02 ( -0.00125971 0.00123931 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.33 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 57 degrees of freedom
# Null hypothesis probability = 2.354118e-01
Photon flux (15-150 keV) in 3 sec: 1.59059 ( -0.154985 0.155108 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17334e-07 ( -3.50472e-08 3.54405e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.904 sec. to 2.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11170 ( -0.768168 0.657443 )
Epeak [keV] : 60.9120 ( -14.3362 135.983 )
Norm@50keV : 2.67345E-02 ( -0.0143896 0.0389269 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.99 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.013832e-01
Photon flux (15-150 keV) in 3 sec: 1.54785 ( -0.16089 0.16019 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04257e-07 ( -3.64995e-08 3.7365e-08 ) ergs/cm2
Band function
Time interval is from -0.904 sec. to 2.096 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11129 ( -0.390352 1.06442 )
beta : -10.0000 ( 10 8.88178e-15 )
Epeak [keV] : 60.8734 ( -14.3042 135.696 )
Norm@50keV : 2.67506E-02 ( -0.014407 0.039032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.99 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.694922e-01
Photon flux (15-150 keV) in 3 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] : 13.2406 (-1.43401 1.5844)
R^2/D10^2 : 0.270282 (-0.0918622 0.140648)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.58 using 59 PHA bins.
# Reduced chi-squared = 1.431 for 57 degrees of freedom
# Null hypothesis probability = 1.802433e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.013e-08 5.545e-09
25- 50 1.058e-07 1.302e-08
50-150 1.186e-07 2.303e-08
15-150 2.545e-07 3.025e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 108.045 (-32.7698 49.6513)
Norm : 6.80885 (-0.827745 1.10744)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.44 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 57 degrees of freedom
# Null hypothesis probability = 3.201279e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.336e-08 7.500e-09
25- 50 9.367e-08 1.125e-08
50-150 1.584e-07 6.481e-08
15-150 3.054e-07 7.269e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.83014 (-0.937087 1.20405)
R1^2/D10^2 : 18.7216 (-13.3748 61.2941)
kT2 [keV] : 16.8007 (-2.20565 2.81297)
R2^2/D10^2 : 9.89369E-02 (-0.0448632 0.0712742)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.01 using 59 PHA bins.
# Reduced chi-squared = 0.9821 for 55 degrees of freedom
# Null hypothesis probability = 5.123203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.835e-08 2.666e-08
25- 50 8.815e-08 2.447e-08
50-150 1.507e-07 4.821e-08
15-150 2.972e-07 6.266e-08
Peak spectrum fit
Power-law model
Time interval is from 0.096 sec. to 1.096 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80050 ( -0.166983 0.174531 )
Norm@50keV : 1.95379E-02 ( -0.0023117 0.0022819 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.45 using 59 PHA bins.
# Reduced chi-squared = 1.113 for 57 degrees of freedom
# Null hypothesis probability = 2.595591e-01
Photon flux (15-150 keV) in 1 sec: 2.69281 ( -0.289142 0.289334 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79862e-07 ( -2.14979e-08 2.16949e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.096 sec. to 1.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.146128 ( -1.06388 0.864334 )
Epeak [keV] : 54.3870 ( -7.38186 11.6205 )
Norm@50keV : 0.141003 ( -0.0894382 0.33581 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.09 using 59 PHA bins.
# Reduced chi-squared = 0.9122 for 56 degrees of freedom
# Null hypothesis probability = 6.610087e-01
Photon flux (15-150 keV) in 1 sec: 2.57710 ( -0.29849 0.29794 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69475e-07 ( -2.1104e-08 2.1858e-08 ) ergs/cm2
Band function
Time interval is from 0.096 sec. to 1.096 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.146999 ( -0.64546 1.38349 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 54.3697 ( -7.374 11.6193 )
Norm@50keV : 0.140918 ( -0.0893649 0.336322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.09 using 59 PHA bins.
# Reduced chi-squared = 0.9288 for 55 degrees of freedom
# Null hypothesis probability = 6.249139e-01
Photon flux (15-150 keV) in 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] : 13.3642 (-1.29443 1.41274)
R^2/D10^2 : 0.478237 (-0.149623 0.216221)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.26 using 59 PHA bins.
# Reduced chi-squared = 0.9870 for 57 degrees of freedom
# Null hypothesis probability = 5.029331e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.810e-08 3.475e-09
25- 50 6.420e-08 8.310e-09
50-150 7.365e-08 1.654e-08
15-150 1.559e-07 2.075e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.7743 (-27.1273 47.0091)
Norm : 12.2017 (-1.62739 1.86464)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.25 using 59 PHA bins.
# Reduced chi-squared = 0.9868 for 57 degrees of freedom
# Null hypothesis probability = 5.032264e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.189e-08 5.080e-09
25- 50 5.501e-08 7.090e-09
50-150 8.851e-08 3.527e-08
15-150 1.754e-07 3.865e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.19368 (-1.12933 1.55641)
R1^2/D10^2 : 56.2359 (-49.3236 852.291)
kT2 [keV] : 14.9412 (-1.66001 2.02137)
R2^2/D10^2 : 0.291771 (-0.117289 0.161145)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.19 using 59 PHA bins.
# Reduced chi-squared = 0.8035 for 55 degrees of freedom
# Null hypothesis probability = 8.513945e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.899e-08 1.092e-08
25- 50 5.679e-08 1.346e-08
50-150 8.194e-08 2.104e-08
15-150 1.677e-07 3.480e-08
Plot creation:
Fri Nov 29 06:57:50 EST 2013