batgrbproduct Analysis for Trigger=578553
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): Sun Nov 24 20:44:37 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger578553/GCN5_download_cron
======================================================================
Trigger: 00578553 Segment: 000
BAT Trigger Time: 406972208 [s; MET]
Trigger Stop: 406972272 [s; MET]
UTC: 2013-11-24T07:49:56.688220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 166.094191118335 Dec: -23.2735973193784 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.87
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.87
Flight Position: [ source = BAT ]
RA: 166.094191118335 Dec: -23.2735973193784 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 166.098993491764 Dec: -23.2642570213299 [deg; J2000]
{ 11h 04m 23.8s , -23d 15' 51.3" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 2.18564784958445 [arcmin] (formal 1-sigma fit error)
SNR: -4.53201157133583
Angular difference between Flight and Ground position is 0.619788 arcmin
Partial Coding Fraction: 0.609375 [ including projection effects ]
Duration
T90: 0.0559999942779541 +/- 0.004
Measured from: 73.2840000987053
to: 73.3400000929832 [s; relative to TRIGTIME]
T50: 0.0359999537467957 +/- 0.004
Measured from: 73.296000123024
to: 73.3320000767708 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 72.8159999847412
to: 73.8159999847412 [s; relative to TRIGTIME]
Total Fluence
Measured from: 73.283999979496
to: 73.3439999818802 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.006756 -0.002632 -0.003866 -0.005219
0.002117 0.002062 0.002195 0.002412 [error]
Peak 0.003212 -0.006977 0.007495 -0.000301
0.008237 0.008580 0.008397 0.009684 [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 1.42e-12 5.24e-12 1.64e-11 1.65e-10 4.58e-11 1.86e-10 erg/cm2
Error 1.47e-10 1.18e-10 7.51e-11 4.88e-10 3.51e-10 4.93e-10 erg/cm2
Peak flux Power-law 7.70e-04 3.90e-03 1.69e-02 2.91e-01 5.15e-02 0.00e+00 ph/cm2/s
Error 5.46e-02 2.72e-02 3.58e-02 5.53e-01 9.79e-02 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 5.53e-11 1.19e-10 1.16e-10 4.30e-11 3.23e-10 3.33e-10 erg/cm2
Error 3.18e-11 4.54e-11 7.70e-11 2.98e-10 1.50e-10 3.63e-10 erg/cm2
Peak flux Cutoff-PL 1.36e-05 2.01e-03 4.09e-02 3.48e-03 7.82e-02 0.00e+00 ph/cm2/s
Error 5.77e-02 3.68e-02 6.38e-02 1.36e-02 1.03e-01 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 0.318 0.000 - - 5.01e-05 5.46e-04 66.560 57
CPL -9.564 0.000 82.9 0.0 8.95e-01 9.31e+00 65.860 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 1.500 0.000 - - 0.00e+00 8.77e-04 57.010 57
CPL 1.000 0.000 50.0 0.0 0.00e+00 0.00e+00 57.010 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 0.060 73.284 73.344
T90 0.056 73.284 73.340
T50 0.036 73.296 73.332
Peak 1.000 72.816 73.816
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
166.0990 -23.2643 0.0425 36.9 -178.9 -0.0195 -4.5 TRIG_00578553
------------------------------------------
Foreground time interval of the image:
73.284 73.344 (delta_t = 0.060 [sec])
Background time interval of the image:
-179.000 -13.750 (delta_t = 165.250 [sec])
-13.000 73.284 (delta_t = 86.284 [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 73.284 sec. to 73.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.318498 ( -0.350651 -0.350651 )
Norm@50keV : 5.00782E-05 ( -5.2683e-05 0.0010398 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.56 using 59 PHA bins.
# Reduced chi-squared = 1.168 for 57 degrees of freedom
# Null hypothesis probability = 1.810412e-01
Photon flux (15-150 keV) in 0.06 sec: 6.42227E-03 ( -0.00642222 0.249073 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58442e-11 ( -4.58442e-11 6.56616e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 73.284 sec. to 73.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.56411 ( )
Epeak [keV] : 82.8983 ( -83.0251 -83.0251 )
Norm@50keV : 0.894905 ( -0.943494 17.6695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.86 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 56 degrees of freedom
# Null hypothesis probability = 1.724761e-01
Photon flux (15-150 keV) in 0.06 sec: 7.21597E-02 ( -0.0721597 0.281057 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22763e-10 ( -1.30673e-10 1.69801e-10 ) ergs/cm2
Band function
Time interval is from 73.284 sec. to 73.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.05899 ( -2.71866 -2.71866 )
beta : -9.37167 ( 4.24935 4.24935 )
Epeak [keV] : 75.5479 ( -75.7868 -75.7868 )
Norm@50keV : 6.64188E-02 ( -0.0641942 14.3125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.21 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 55 degrees of freedom
# Null hypothesis probability = 1.431765e-01
Photon flux (15-150 keV) in 0.06 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 = 67.61 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.586617e-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 = 67.61 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.586617e-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
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.65 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.45 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 55 degrees of freedom
# Reduced chi-squared = 1.212 for 55 degrees of freedom
# Reduced chi-squared = 1.211 for 55 degrees of freedom
# Reduced chi-squared = 1.208 for 55 degrees of freedom
# Null hypothesis probability = 1.182196e-01
# Null hypothesis probability = 1.349100e-01
# Null hypothesis probability = 1.356568e-01
# Null hypothesis probability = 1.385240e-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 72.816 sec. to 73.816 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 0.00175433 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.747910e-01
Photon flux (15-150 keV) in 1 sec: 5.15316E-02 ( -0.0515316 0.144234 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.47179e-09 ( -8.47179e-09 2.04091e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 72.816 sec. to 73.816 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 = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 56 degrees of freedom
# Null hypothesis probability = 4.373751e-01
Photon flux (15-150 keV) in 1 sec: 7.81544E-02 ( -0.0781544 0.128346 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37938e-09 ( -2.17788e-09 2.83002e-09 ) ergs/cm2
Band function
Time interval is from 72.816 sec. to 73.816 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.999826 ( 0.98395 0.98395 )
beta : 1.09302 ( 2.5 2.5 )
Epeak [keV] : 0.984277 ( -80 -80 )
Norm@50keV : 3.04306E-02 ( -0.0295406 1.52772e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.50 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Null hypothesis probability = 4.186561e-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] : 199.321 ( )
R^2/D10^2 : 2.22436E-05 (-3.21552e-05 -3.21552e-05)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.56 using 59 PHA bins.
# Reduced chi-squared = 0.9923 for 57 degrees of freedom
# Null hypothesis probability = 4.914289e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.088e-10 3.436e-10
25- 50 1.965e-10 2.972e-11
50-150 1.882e-12 1.384e-15
15-150 8.072e-10 1.944e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.14043 (-8.14483 -8.14483)
Norm : 0.170611 (-0.169812 -0.169812)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.748248e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.671e-11 0.000e+00
25- 50 2.449e-11 0.000e+00
50-150 9.128e-13 0.000e+00
15-150 1.021e-10 0.000e+00
Double BB
#Fit statistic : Chi-Squared = 56.65 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.52 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Reduced chi-squared = 1.028 for 55 degrees of freedom
# Reduced chi-squared = 1.027 for 55 degrees of freedom
# Null hypothesis probability = 4.018790e-01
# Null hypothesis probability = 4.120823e-01
# Null hypothesis probability = 4.132986e-01
# Null hypothesis probability = 4.181137e-01
# Null hypothesis probability = 4.193200e-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:
Sun Nov 24 21:03:45 EST 2013