batgrbproduct Analysis for Trigger=568417
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 Aug 29 18:10:40 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger568417/batgroup_hand_proc
======================================================================
Trigger: 00568417 Segment: 000
BAT Trigger Time: 399447824 [s; MET]
Trigger Stop: 399447888 [s; MET]
UTC: 2013-08-29T05:43:33.032660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 182.436503188924 Dec: 46.5315062760872 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 13.79
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.79
Flight Position: [ source = BAT ]
RA: 182.436503188924 Dec: 46.5315062760872 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 182.431428880595 Dec: 46.5230128926365 [deg; J2000]
{ 12h 09m 43.5s , +46d 31' 22.8" }
+/- 1.28656638035507 [arcmin] (estimated 90% radius based on SNR)
+/- 0.539599871486605 [arcmin] (formal 1-sigma fit error)
SNR: 21.2220174740271
Angular difference between Flight and Ground position is 0.550975 arcmin
Partial Coding Fraction: 0.84375 [ including projection effects ]
Duration
T90: 47.5079998970032 +/- 8.9696958939664
Measured from: 35.9520000219345
to: 83.4599999189377 [s; relative to TRIGTIME]
T50: 20.4439999461174 +/- 5.19433615394216
Measured from: 44.6399999856949
to: 65.0839999318123 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 50.9399999976158
to: 51.9399999976158 [s; relative to TRIGTIME]
Total Fluence
Measured from: 27.0720000267029
to: 91.8920000195503 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.442407 0.728937 0.566987 0.093865
0.041671 0.042202 0.038798 0.036436 [error]
Peak 0.023058 0.026419 0.020624 0.007989
0.005278 0.005335 0.004959 0.004562 [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 1.48e-07 2.89e-07 4.36e-07 1.43e-06 1.22e-06 2.30e-06 erg/cm2
Error 1.80e-08 2.10e-08 3.86e-08 2.78e-07 9.42e-08 3.06e-07 erg/cm2
Peak flux Power-law 1.99e-01 1.99e-01 1.39e-01 1.54e-01 5.98e-01 6.91e-01 ph/cm2/s
Error 7.15e-02 4.44e-02 4.13e-02 9.55e-02 1.29e-01 1.55e-01 ph/cm2/s
Fluence Cutoff-PL 1.38e-07 3.00e-07 4.46e-07 7.71e-07 1.18e-06 1.65e-06 erg/cm2
Error 2.18e-08 2.54e-08 4.20e-08 5.67e-07 1.08e-07 5.80e-07 erg/cm2
Peak flux Cutoff-PL 2.00e-01 1.99e-01 1.39e-01 5.98e-01 6.89e-01 0.00e+00 ph/cm2/s
Error 7.12e-02 4.68e-02 4.12e-02 1.29e-01 1.69e-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 1.406 0.122 - - 1.96e-03 1.34e-04 59.750 57
CPL 0.989 0.508 122.6 -39.4 3.16e-03 1.98e-03 57.690 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 1.514 0.397 - - 4.77e-03 1.10e-03 52.220 57
CPL 1.524 0.451 9999.4 0.0 4.76e-03 9.52e-03 52.230 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: 39.488000 sec.
T50 in the 50-300 keV band: 13.376000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.820 27.072 91.892
T90 47.508 35.952 83.460
T50 20.444 44.640 65.084
Peak 1.000 50.940 51.940
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
182.4314 46.5230 0.0091 25.5746 -32.5726 1.9961165 21.222 TRIG_00568417
Foreground time interval of the image:
27.072 91.892 (delta_t = 64.820 [sec])
Background time interval of the image:
-239.000 -216.114 (delta_t = 22.886 [sec])
-214.000 -201.415 (delta_t = 12.585 [sec])
-198.000 27.072 (delta_t = 225.072 [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 27.072 sec. to 91.892 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40564 ( -0.121777 0.122131 )
Norm@50keV : 1.95679E-03 ( -0.00013471 0.000134198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.75 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 57 degrees of freedom
# Null hypothesis probability = 3.759285e-01
Photon flux (15-150 keV) in 64.82 sec: 0.238607 ( -0.0165105 0.0165347 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2242e-06 ( -9.3871e-08 9.46275e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 27.072 sec. to 91.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.988556 ( -0.553596 0.462829 )
Epeak [keV] : 122.572 ( -43.8452 -122.572 )
Norm@50keV : 3.15617E-03 ( -0.00125922 0.00270541 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.69 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 56 degrees of freedom
# Null hypothesis probability = 4.124247e-01
Photon flux (15-150 keV) in 64.82 sec: 0.233360 ( -0.017641 0.017604 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18155e-06 ( -1.07744e-07 1.07523e-07 ) ergs/cm2
Band function
Time interval is from 27.072 sec. to 91.892 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.547842 ( 0.642859 3.75939 )
beta : -1.61704 ( 1.62212 0.258641 )
Epeak [keV] : 70.3832 ( -69.7595 388.249 )
Norm@50keV : 5.88412E-03 ( -0.00610055 0.788159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.10 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 3.969070e-01
Photon flux (15-150 keV) in 64.82 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] : 15.6051 (-1.31947 1.47639)
R^2/D10^2 : 2.38281E-02 (-0.0063959 0.00856238)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.14 using 59 PHA bins.
# Reduced chi-squared = 1.634 for 57 degrees of freedom
# Null hypothesis probability = 1.779431e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.818e-08 1.063e-08
25- 50 3.219e-07 3.179e-08
50-150 5.426e-07 7.111e-08
15-150 9.427e-07 8.329e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.982410 (-0.0664455 0.0664422)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.88 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.063013e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.586e-07 1.251e-08
25- 50 3.050e-07 3.734e-08
50-150 6.690e-07 1.971e-07
15-150 1.133e-06 2.178e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.46941 (-2.07828 2.23496)
R1^2/D10^2 : 0.122762 (-0.0591368 0.163503)
kT2 [keV] : 29.9216 (-7.6929 21.6263)
R2^2/D10^2 : 1.92266E-03 (-0.00156267 0.00381493)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.03 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Null hypothesis probability = 3.643374e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.248e-07 3.621e-08
25- 50 3.146e-07 1.092e-07
50-150 7.474e-07 3.490e-07
15-150 1.187e-06 3.939e-07
Peak spectrum fit
Power-law model
Time interval is from 50.940 sec. to 51.940 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51429 ( -0.394457 0.400237 )
Norm@50keV : 4.76900E-03 ( -0.00111125 0.00108134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.22 using 59 PHA bins.
# Reduced chi-squared = 0.9162 for 57 degrees of freedom
# Null hypothesis probability = 6.545176e-01
Photon flux (15-150 keV) in 1 sec: 0.597676 ( -0.12889 0.129009 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.51372e-08 ( -1.13762e-08 1.17647e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 50.940 sec. to 51.940 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52360 ( -0.50685 0.395336 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.75503E-03 ( -0.0011112 0.0179346 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.23 using 59 PHA bins.
# Reduced chi-squared = 0.9327 for 56 degrees of freedom
# Null hypothesis probability = 6.184009e-01
Photon flux (15-150 keV) in 1 sec: 0.597730 ( -0.129027 0.128703 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 50.940 sec. to 51.940 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96067 ( -4.96067 -4.96067 )
beta : -1.71555 ( -0.657574 0.48008 )
Epeak [keV] : 25.7011 ( -25.7011 7.54875 )
Norm@50keV : 433.565 ( -91.792 3.0539e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.84 using 59 PHA bins.
# Reduced chi-squared = 0.9243 for 55 degrees of freedom
# Null hypothesis probability = 6.344153e-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] : 12.3191 (-4.13162 7.16357)
R^2/D10^2 : 0.128278 (-0.0987627 0.430142)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.02 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 57 degrees of freedom
# Null hypothesis probability = 3.334691e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.125e-09 2.076e-09
25- 50 1.338e-08 5.884e-09
50-150 1.242e-08 6.860e-09
15-150 2.993e-08 1.396e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.357 (-123.76 -199.361)
Norm : 2.43230 (-0.522353 0.522798)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.56 using 59 PHA bins.
# Reduced chi-squared = 0.9220 for 57 degrees of freedom
# Null hypothesis probability = 6.423301e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.057e-09 3.577e-09
25- 50 1.165e-08 6.840e-09
50-150 2.555e-08 1.469e-08
15-150 4.326e-08 2.491e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.67307 (-2.12766 3.1584)
R1^2/D10^2 : 0.937341 (-0.699155 1.37824)
kT2 [keV] : 37.2976 (-18.0106 -37.3035)
R2^2/D10^2 : 2.61120E-03 (-0.00249293 0.00682521)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.11 using 59 PHA bins.
# Reduced chi-squared = 0.9111 for 55 degrees of freedom
# Null hypothesis probability = 6.616152e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.856e-09 4.015e-09
25- 50 1.122e-08 6.485e-09
50-150 2.985e-08 1.773e-08
15-150 4.792e-08 2.494e-08
Plot creation:
Thu Aug 29 18:39:26 EDT 2013