batgrbproduct Analysis for Trigger=579571
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 Nov 28 01:29:57 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger579571/GCN5_download_cron
======================================================================
Trigger: 00579571 Segment: 000
BAT Trigger Time: 407239906.88 [s; MET]
Trigger Stop: 407239908.928 [s; MET]
UTC: 2013-11-27T10:11:35.555860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 332.750849413723 Dec: 36.5900862487713 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.02
Image Trigger?: NO
Rate S/N Ratio: 11.2694276695846 [ if not an image trigger ]
Image S/N Ratio: 9.02
Flight Position: [ source = BAT ]
RA: 332.750849413723 Dec: 36.5900862487713 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 332.713671271492 Dec: 36.5964320189941 [deg; J2000]
{ 22h 10m 51.3s , +36d 35' 47.2" }
+/- 1.83199338469004 [arcmin] (estimated 90% radius based on SNR)
+/- 0.797015075212736 [arcmin] (formal 1-sigma fit error)
SNR: 12.8089286644854
Angular difference between Flight and Ground position is 1.831016 arcmin
Partial Coding Fraction: 0.390625 [ including projection effects ]
Duration
T90: 91.0079998970032 +/- 16.8507724348672
Measured from: -57.1319998502731
to: 33.87600004673 [s; relative to TRIGTIME]
T50: 23.1399999260902 +/- 3.43979127792839
Measured from: -1.27999985218048
to: 21.8600000739098 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.53600001335144
to: 0.46399998664856 [s; relative to TRIGTIME]
Total Fluence
Measured from: -59.3640000224113
to: 51.2639999985695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.736636 1.455138 0.594522 0.000546
0.091813 0.094917 0.083335 0.074365 [error]
Peak 0.040552 0.047246 0.057231 0.014655
0.009387 0.009641 0.009220 0.007344 [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 5.85e-07 6.40e-07 4.98e-07 6.38e-07 1.96e-06 2.36e-06 erg/cm2
Error 5.90e-08 4.98e-08 7.62e-08 1.87e-07 1.73e-07 2.83e-07 erg/cm2
Peak flux Power-law 3.75e-01 4.18e-01 3.33e-01 4.40e-01 1.29e+00 1.57e+00 ph/cm2/s
Error 1.31e-01 8.72e-02 7.37e-02 2.12e-01 2.41e-01 2.94e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 3.80e-01 4.20e-01 3.32e-01 4.31e-01 1.29e+00 1.56e+00 ph/cm2/s
Error 1.32e-01 8.73e-02 7.53e-02 1.90e-01 2.41e-01 3.33e-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 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 2.361 0.158 - - 1.83e-03 2.02e-04 60.140 57
CPL 2.348 0.160 9999.4 0.0 1.85e-03 0.00e+00 60.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.327 0.338 - - 1.07e-02 1.95e-03 53.500 57
CPL 1.325 0.432 9999.2 0.0 1.08e-02 9.97e-03 53.500 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: 24.704000 sec.
T50 in the 50-300 keV band: 18.624000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 110.628 -59.364 51.264
T90 91.008 -57.132 33.876
T50 23.140 -1.280 21.860
Peak 1.000 -0.536 0.464
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
332.7137 +36.5964 0.0150 33.6 -65.5 2.7629 12.8 TRIG_00579571
------------------------------------------
Foreground time interval of the image:
-59.364 28.521 (delta_t = 87.885 [sec])
Background time interval of the image:
-188.479 -59.364 (delta_t = 129.115 [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 -59.364 sec. to 51.264 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.36051 ( -0.153916 0.161944 )
Norm@50keV : 1.83482E-03 ( -0.000203281 0.000200716 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.14 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.626767e-01
Photon flux (15-150 keV) in 110.6 sec: 0.331805 ( -0.0246257 0.0246375 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96252e-06 ( -1.71735e-07 1.74995e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -59.364 sec. to 51.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.34836 ( -0.142904 0.176236 )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 1.85395E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.17 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.271921e-01
Photon flux (15-150 keV) in 110.6 sec: 0.324752 ( -0.025797 0.025824 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -59.364 sec. to 51.264 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.85002 ( 1.82341 0.337812 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 11.1853 ( -4.5471 17.1688 )
Norm@50keV : 3.74766E-03 ( -0.00158823 0.00622833 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.670201e-01
Photon flux (15-150 keV) in 110.6 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] : 7.96688 (-0.745251 0.814364)
R^2/D10^2 : 0.352051 (-0.115509 0.176758)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.60 using 59 PHA bins.
# Reduced chi-squared = 1.660 for 57 degrees of freedom
# Null hypothesis probability = 1.292478e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.455e-07 5.381e-08
25- 50 7.741e-07 7.189e-08
50-150 2.005e-07 5.110e-08
15-150 1.420e-06 1.316e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 38.9503 (-7.04274 9.23699)
Norm : 2.15224 (-0.320227 0.392519)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.51 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 57 degrees of freedom
# Null hypothesis probability = 3.844255e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.416e-07 5.353e-08
25- 50 7.044e-07 5.845e-08
50-150 5.292e-07 1.356e-07
15-150 1.775e-06 1.786e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.47135 (-0.784972 0.918147)
R1^2/D10^2 : 2.84522 (-1.50981 3.74651)
kT2 [keV] : 14.4604 (-2.71182 4.26041)
R2^2/D10^2 : 2.20477E-02 (-0.0147783 0.0229662)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.31 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 55 degrees of freedom
# Null hypothesis probability = 4.630434e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.861e-07 2.095e-07
25- 50 6.469e-07 1.938e-07
50-150 5.818e-07 3.301e-07
15-150 1.815e-06 6.108e-07
Peak spectrum fit
Power-law model
Time interval is from -0.536 sec. to 0.464 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32747 ( -0.33884 0.337689 )
Norm@50keV : 1.07447E-02 ( -0.00195348 0.00194939 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.50 using 59 PHA bins.
# Reduced chi-squared = 0.9386 for 57 degrees of freedom
# Null hypothesis probability = 6.072582e-01
Photon flux (15-150 keV) in 1 sec: 1.28859 ( -0.240921 0.241548 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05483e-07 ( -2.1345e-08 2.1581e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.536 sec. to 0.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32543 ( -0.525583 0.338214 )
Epeak [keV] : 9999.24 ( -9999.35 -9999.35 )
Norm@50keV : 1.07863E-02 ( -0.00196303 0.0179864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.50 using 59 PHA bins.
# Reduced chi-squared = 0.9554 for 56 degrees of freedom
# Null hypothesis probability = 5.699104e-01
Photon flux (15-150 keV) in 1 sec: 1.29164 ( -0.24433 0.23863 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0492e-07 ( -2.0848e-08 2.1964e-08 ) ergs/cm2
Band function
Time interval is from -0.536 sec. to 0.464 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.07554 ( 1.07583 1.07583 )
beta : -1.32739 ( 1.32745 0.338825 )
Epeak [keV] : 41.9891 ( -41.7343 -41.7343 )
Norm@50keV : 2.00402E-02 ( -0.0112442 1.70565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.50 using 59 PHA bins.
# Reduced chi-squared = 0.9727 for 55 degrees of freedom
# Null hypothesis probability = 5.322015e-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] : 19.0078 (-4.4144 6.06861)
R^2/D10^2 : 6.65074E-02 (-0.0396627 0.0938788)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.65 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 57 degrees of freedom
# Null hypothesis probability = 2.539904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.722e-09 1.987e-09
25- 50 2.272e-08 8.127e-09
50-150 6.033e-08 2.265e-08
15-150 8.778e-08 3.117e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 5.32255 (-0.974798 0.974722)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.53 using 59 PHA bins.
# Reduced chi-squared = 0.9742 for 57 degrees of freedom
# Null hypothesis probability = 5.304285e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.325e-08 7.665e-09
25- 50 2.550e-08 1.474e-08
50-150 5.592e-08 3.210e-08
15-150 9.467e-08 5.460e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.03511 (-2.14965 4.17873)
R1^2/D10^2 : 4.50513 (-4.01186 18.5325)
kT2 [keV] : 27.3092 (-8.07703 28.9115)
R2^2/D10^2 : 1.80378E-02 (-0.0158639 0.0403789)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.15 using 59 PHA bins.
# Reduced chi-squared = 0.9665 for 55 degrees of freedom
# Null hypothesis probability = 5.454339e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.349e-08 7.770e-09
25- 50 2.067e-08 1.086e-08
50-150 7.190e-08 4.237e-08
15-150 1.061e-07 5.374e-08
Plot creation:
Thu Nov 28 01:54:15 EST 2013