batgrbproduct Analysis for Trigger=565562
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): Tue Aug 6 13:07:26 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger565562/batgroup_hand_proc
======================================================================
Trigger: 00565562 Segment: 000
BAT Trigger Time: 397450304.832 [s; MET]
Trigger Stop: 397450305.856 [s; MET]
UTC: 2013-08-06T02:51:33.954800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 35.8720478135784 Dec: 67.5299573117295 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.81
Image Trigger?: NO
Rate S/N Ratio: 27.0370116691915 [ if not an image trigger ]
Image S/N Ratio: 14.81
Flight Position: [ source = BAT ]
RA: 35.8720478135784 Dec: 67.5299573117295 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 35.9070101774063 Dec: 67.5251390612803 [deg; J2000]
{ 02h 23m 37.7s , +67d 31' 30.5" }
+/- 1.58931309074697 [arcmin] (estimated 90% radius based on SNR)
+/- 0.824858519600147 [arcmin] (formal 1-sigma fit error)
SNR: 15.6919275188561
Angular difference between Flight and Ground position is 0.852363 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 6.1039999127388 +/- 0.516189858947235
Measured from: -4.24000000953674
to: 1.86399990320206 [s; relative to TRIGTIME]
T50: 1.39199995994568 +/- 2.93658303172416
Measured from: -0.312000036239624
to: 1.07999992370605 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.319999992847443
to: 1.31999999284744 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.50800001621246
to: 2.22399997711182 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.187783 0.139423 0.042526 0.011665
0.013095 0.012797 0.010834 0.009219 [error]
Peak 0.082273 0.053420 0.015242 0.004925
0.005874 0.005397 0.004216 0.003572 [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 5.56e-08 5.60e-08 3.96e-08 4.45e-08 1.69e-07 1.96e-07 erg/cm2
Error 6.88e-09 6.23e-09 9.07e-09 1.91e-08 2.08e-08 3.19e-08 erg/cm2
Peak flux Power-law 7.96e-01 4.01e-01 1.24e-01 4.90e-02 1.35e+00 1.37e+00 ph/cm2/s
Error 1.07e-01 4.70e-02 3.09e-02 2.21e-02 1.39e-01 1.41e-01 ph/cm2/s
Fluence Cutoff-PL 5.47e-08 5.90e-08 3.48e-08 1.36e-08 1.58e-07 1.62e-07 erg/cm2
Error 7.26e-09 8.19e-09 1.30e-08 2.63e-08 4.41e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 7.77e-01 4.18e-01 1.15e-01 2.26e-02 1.33e+00 1.33e+00 ph/cm2/s
Error 1.16e-01 6.01e-02 3.85e-02 3.51e-02 1.45e-01 1.54e-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 2.500 0.223 - - 2.51e-03 4.18e-04 63.920 57
CPL 1.911 0.000 5.2 0.0 6.03e-03 0.00e+00 63.040 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 2.690 0.250 - - 6.08e-03 1.14e-03 50.730 57
CPL 1.990 0.000 0.5 0.2 1.69e-02 2.81e-03 50.250 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 6.732 -4.508 2.224
T90 6.104 -4.240 1.864
T50 1.392 -0.312 1.080
Peak 1.000 0.320 1.320
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
35.9070 67.5251 0.0123 12.3909 -70.0674 0.3873254 15.692 TRIG_00565562
Foreground time interval of the image:
-4.508 2.224 (delta_t = 6.732 [sec])
Background time interval of the image:
-60.832 -4.508 (delta_t = 56.324 [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 -4.508 sec. to 2.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49960 ( -0.214611 0.231878 )
Norm@50keV : 2.50808E-03 ( -0.000418651 0.000416782 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.92 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.464399e-01
Photon flux (15-150 keV) in 6.732 sec: 0.492580 ( -0.0476573 0.0476573 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.68819e-07 ( -2.04195e-08 2.11479e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.508 sec. to 2.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91108 ( )
Epeak [keV] : 5.18512 ( )
Norm@50keV : 6.03049E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.04 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 56 degrees of freedom
# Null hypothesis probability = 2.415240e-01
Photon flux (15-150 keV) in 6.732 sec: 0.482649 ( -0.050072 0.050552 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57663e-07 ( -2.40198e-08 2.84804e-08 ) ergs/cm2
Band function
Time interval is from -4.508 sec. to 2.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94304 ( -4.94304 -4.94304 )
beta : -2.63430 ( -0.368598 0.260153 )
Epeak [keV] : 18.8738 ( -5.83973 3.19097 )
Norm@50keV : 3916.95 ( -377.747 8.07989e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.05 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 55 degrees of freedom
# Null hypothesis probability = 2.392437e-01
Photon flux (15-150 keV) in 6.732 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] : 6.92941 (-0.81078 0.911557)
R^2/D10^2 : 0.937148 (-0.377651 0.656352)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.78 using 59 PHA bins.
# Reduced chi-squared = 1.382 for 57 degrees of freedom
# Null hypothesis probability = 2.958006e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.815e-08 8.368e-09
25- 50 6.465e-08 9.290e-09
50-150 1.033e-08 3.925e-09
15-150 1.231e-07 1.491e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.6271 (-6.78074 9.4593)
Norm : 3.84449 (-0.787588 1.06483)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.76 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 57 degrees of freedom
# Null hypothesis probability = 2.509824e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.323e-08 6.251e-09
25- 50 6.151e-08 7.503e-09
50-150 3.461e-08 1.291e-08
15-150 1.493e-07 1.878e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.32138 (-1.20447 1.3385)
R1^2/D10^2 : 5.06353 (-3.24708 5.82359)
kT2 [keV] : 12.6725 (-3.43193 8.98437)
R2^2/D10^2 : 4.91452E-02 (-0.044379 0.0799907)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.63 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 55 degrees of freedom
# Null hypothesis probability = 2.238670e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.580e-08 2.893e-08
25- 50 5.768e-08 2.779e-08
50-150 3.812e-08 2.270e-08
15-150 1.516e-07 7.213e-08
Peak spectrum fit
Power-law model
Time interval is from 0.320 sec. to 1.320 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.69019 ( -0.238353 0.261928 )
Norm@50keV : 6.07941E-03 ( -0.00114515 0.00114313 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.73 using 59 PHA bins.
# Reduced chi-squared = 0.8901 for 57 degrees of freedom
# Null hypothesis probability = 7.077346e-01
Photon flux (15-150 keV) in 1 sec: 1.34805 ( -0.13919 0.139213 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.44541e-08 ( -7.98016e-09 8.23114e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.320 sec. to 1.320 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98991 ( )
Epeak [keV] : 0.509609 ( -0.165319 0.314675 )
Norm@50keV : 1.69100E-02 ( -0.00385132 0.00176923 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.25 using 59 PHA bins.
# Reduced chi-squared = 0.8973 for 56 degrees of freedom
# Null hypothesis probability = 6.914106e-01
Photon flux (15-150 keV) in 1 sec: 1.32716 ( -0.14482 0.14523 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.1656e-08 ( -8.897e-09 1.00083e-08 ) ergs/cm2
Band function
Time interval is from 0.320 sec. to 1.320 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.99058 ( 0.744083 0.744083 )
beta : -4.03007 ( 3.96931 13.5955 )
Epeak [keV] : 0.465750 ( -0.157228 0.303019 )
Norm@50keV : 1.70699E-02 ( -0.00176014 0.00175949 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.22 using 59 PHA bins.
# Reduced chi-squared = 0.9132 for 55 degrees of freedom
# Null hypothesis probability = 6.573029e-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] : 6.71351 (-0.878027 0.987399)
R^2/D10^2 : 2.87098 (-1.26961 2.43678)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.41 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.430905e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.986e-08 3.810e-09
25- 50 2.505e-08 4.550e-09
50-150 3.560e-09 1.482e-09
15-150 4.848e-08 6.790e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.8162 (-6.01523 8.2025)
Norm : 11.7452 (-2.69121 3.81149)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.75 using 59 PHA bins.
# Reduced chi-squared = 0.9080 for 57 degrees of freedom
# Null hypothesis probability = 6.715816e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.247e-08 2.990e-09
25- 50 2.406e-08 3.150e-09
50-150 1.131e-08 4.741e-09
15-150 5.784e-08 7.625e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.49978 (-1.05331 1.20083)
R1^2/D10^2 : 38.2744 (-28.1325 229.855)
kT2 [keV] : 11.0135 (-2.43112 4.18255)
R2^2/D10^2 : 0.255382 (-0.199442 0.319711)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.25 using 59 PHA bins.
# Reduced chi-squared = 0.8954 for 55 degrees of freedom
# Null hypothesis probability = 6.930782e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.400e-08 1.239e-08
25- 50 2.258e-08 1.053e-08
50-150 1.260e-08 8.020e-09
15-150 5.918e-08 2.799e-08
Plot creation:
Tue Aug 6 13:19:42 EDT 2013