batgrbproduct Analysis for Trigger=535960
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): Mon Oct 15 13:00:36 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger535960/GCN5_download_cron
======================================================================
Trigger: 00535960 Segment: 000
BAT Trigger Time: 371938326.208 [s; MET]
Trigger Stop: 371938326.72 [s; MET]
UTC: 2012-10-14T20:11:56.448420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 166.630696384298 Dec: -29.1090441328934 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.69
Image Trigger?: NO
Rate S/N Ratio: 22.956480566498 [ if not an image trigger ]
Image S/N Ratio: 11.69
Flight Position: [ source = BAT ]
RA: 166.630696384298 Dec: -29.1090441328934 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 166.644641923057 Dec: -29.1050848042283 [deg; J2000]
{ 11h 06m 34.7s , -29d 06' 18.3" }
+/- 1.97145833417032 [arcmin] (estimated 90% radius based on SNR)
+/- 0.945437465611604 [arcmin] (formal 1-sigma fit error)
SNR: 11.534352852864
Angular difference between Flight and Ground position is 0.768692 arcmin
Partial Coding Fraction: 0.7265625 [ including projection effects ]
Duration
T90: 80 +/- 22.6274169979695
Measured from: -12.2079998850822
to: 67.7920001149178 [s; relative to TRIGTIME]
T50: 48 +/- 16
Measured from: 3.79200011491776
to: 51.7920001149178 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 59.2919999957085
to: 60.2919999957085 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.2080000042915
to: 67.7919999957085 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.632599 0.716463 0.409263 0.033254
0.056608 0.057854 0.049922 0.041732 [error]
Peak 0.014025 0.016667 0.006511 0.006567
0.006368 0.006538 0.005616 0.004681 [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 2.17e-07 3.11e-07 3.30e-07 6.49e-07 1.06e-06 1.51e-06 erg/cm2
Error 2.98e-08 2.81e-08 4.95e-08 1.97e-07 1.13e-07 2.46e-07 erg/cm2
Peak flux Power-law 1.42e-01 1.15e-01 6.23e-02 4.96e-02 3.42e-01 3.69e-01 ph/cm2/s
Error 9.98e-02 5.37e-02 4.76e-02 8.97e-02 1.60e-01 1.77e-01 ph/cm2/s
Fluence Cutoff-PL 2.15e-07 3.15e-07 3.30e-07 5.20e-07 1.38e-06 0.00e+00 erg/cm2
Error 3.26e-08 3.48e-08 5.05e-08 4.27e-07 3.80e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.43e-01 1.15e-01 6.22e-02 4.90e-02 3.41e-01 3.68e-01 ph/cm2/s
Error 9.95e-02 5.37e-02 5.60e-02 8.90e-02 1.60e-01 1.32e-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 1.913 0.173 - - 1.44e-03 1.56e-04 47.710 57
CPL 1.795 0.562 76.2 0.0 1.68e-03 0.00e+00 47.610 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.879 1.094 - - 2.40e-03 1.87e-03 51.600 57
CPL 1.882 5.591 769.3 0.0 2.41e-03 0.00e+00 51.600 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: 55.104000 sec.
T50 in the 50-300 keV band: 31.296000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 80.000 -12.208 67.792
T90 80.000 -12.208 67.792
T50 48.000 3.792 51.792
Peak 1.000 59.292 60.292
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
166.6446 -29.1051 0.0168 32.7 -25.6 2.0031 11.5 TRIG_00535960
------------------------------------------
Foreground time interval of the image:
-12.208 67.792 (delta_t = 80.000 [sec])
Background time interval of the image:
-60.208 -12.208 (delta_t = 48.000 [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 -12.208 sec. to 67.792 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91327 ( -0.16925 0.176039 )
Norm@50keV : 1.44110E-03 ( -0.000157898 0.000154623 )
------------------------------------------------------------
# Chi-Squared = 47.71 using 59 PHA bins.
# Reduced chi-squared = 0.8370 for 57 degrees of freedom
# Null hypothesis probability = 8.048838e-01
Photon flux (15-150 keV) in 80 sec: 0.207987 ( -0.0190296 0.0190485 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06008e-06 ( -1.12554e-07 1.14175e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.208 sec. to 67.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.79465 ( -0.635849 0.487342 )
Epeak [keV] : 76.2144 ( )
Norm@50keV : 1.67901E-03 ( )
------------------------------------------------------------
# Chi-Squared = 47.61 using 59 PHA bins.
# Reduced chi-squared = 0.8502 for 56 degrees of freedom
# Null hypothesis probability = 7.800098e-01
Photon flux (15-150 keV) in 80 sec: 0.206901 ( -0.019888 0.019699 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38e-06 ( -3.84992e-07 3.746e-07 ) ergs/cm2
Band function
Time interval is from -12.208 sec. to 67.792 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.28151 ( 1.26642 1.26642 )
beta : -2.01654 ( 2.01719 0.25249 )
Epeak [keV] : 37.6060 ( -37.1319 -37.1319 )
Norm@50keV : 3.69270E-03 ( -0.00392296 145.468 )
------------------------------------------------------------
# Chi-Squared = 47.22 using 59 PHA bins.
# Reduced chi-squared = 0.8586 for 55 degrees of freedom
# Null hypothesis probability = 7.628126e-01
Photon flux (15-150 keV) in 80 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] : 10.3776 (-1.16748 1.34411)
R^2/D10^2 : 8.26414E-02 (-0.0306055 0.0478252)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 78.18 using 59 PHA bins.
# Reduced chi-squared = 1.372 for 57 degrees of freedom
# Null hypothesis probability = 3.277507e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.467e-07 2.460e-08
25- 50 3.840e-07 4.284e-08
50-150 2.229e-07 5.356e-08
15-150 7.536e-07 8.552e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 80.9571 (-21.9421 37.1855)
Norm : 0.965933 (-0.131504 0.160934)
------------------------------------------------------------
# Chi-Squared = 48.91 using 59 PHA bins.
# Reduced chi-squared = 0.8581 for 57 degrees of freedom
# Null hypothesis probability = 7.684324e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.007e-07 2.384e-08
25- 50 3.313e-07 3.220e-08
50-150 4.714e-07 1.746e-07
15-150 1.003e-06 1.836e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49169 (-1.59941 1.64577)
R1^2/D10^2 : 0.371729 (-0.198241 0.440006)
kT2 [keV] : 24.7099 (-7.72967 21.5921)
R2^2/D10^2 : 2.22573E-03 (-0.00190126 0.0073018)
------------------------------------------------------------
# Chi-Squared = 48.62 using 59 PHA bins.
# Reduced chi-squared = 0.8839 for 55 degrees of freedom
# Null hypothesis probability = 7.155775e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.039e-07 7.300e-08
25- 50 3.250e-07 1.129e-07
50-150 5.132e-07 2.721e-07
15-150 1.042e-06 3.788e-07
Peak spectrum fit
Power-law model
Time interval is from 59.292 sec. to 60.292 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87854 ( -0.985053 1.20246 )
Norm@50keV : 2.40125E-03 ( -0.00240122 0.00134509 )
------------------------------------------------------------
# Chi-Squared = 51.60 using 59 PHA bins.
# Reduced chi-squared = 0.9053 for 57 degrees of freedom
# Null hypothesis probability = 6.770304e-01
Photon flux (15-150 keV) in 1 sec: 0.341507 ( -0.160184 0.160229 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20739e-08 ( -1.22754e-08 1.34115e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 59.292 sec. to 60.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88190 ( -3.91293 7.26901 )
Epeak [keV] : 769.318 ( )
Norm@50keV : 2.41070E-03 ( )
------------------------------------------------------------
# Chi-Squared = 51.60 using 59 PHA bins.
# Reduced chi-squared = 0.9215 for 56 degrees of freedom
# Null hypothesis probability = 6.418452e-01
Photon flux (15-150 keV) in 1 sec: 0.341405 ( -0.160176 0.160155 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16675e-08 ( -2.26802e-08 4.60832e-08 ) ergs/cm2
Band function
Time interval is from 59.292 sec. to 60.292 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.41573 ( 1.41568 1.41568 )
beta : -1.87850 ( 1.87851 0.983216 )
Epeak [keV] : 8.05143 ( -8.05618 -8.05618 )
Norm@50keV : 9.89234E-03 ( -0.00989107 20558 )
------------------------------------------------------------
# Chi-Squared = 51.60 using 59 PHA bins.
# Reduced chi-squared = 0.9382 for 55 degrees of freedom
# Null hypothesis probability = 6.052247e-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] : 8.28542 (-4.02756 10.2225)
R^2/D10^2 : 0.316313 (-0.314756 4.37312)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 53.36 using 59 PHA bins.
# Reduced chi-squared = 0.9361 for 57 degrees of freedom
# Null hypothesis probability = 6.125196e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.025e-09 2.792e-09
25- 50 7.480e-09 5.050e-09
50-150 2.201e-09 1.999e-09
15-150 1.371e-08 9.810e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 88.5910 (-88.7134 -88.7134)
Norm : 1.53418 (-0.819418 3.4187)
------------------------------------------------------------
# Chi-Squared = 52.02 using 59 PHA bins.
# Reduced chi-squared = 0.9127 for 57 degrees of freedom
# Null hypothesis probability = 6.619063e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.001e-09 2.592e-09
25- 50 6.744e-09 4.315e-09
50-150 1.017e-08 9.020e-09
15-150 2.091e-08 1.564e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.98251 (-2.05863 5.1397)
R1^2/D10^2 : 0.570179 (-0.522353 12.8034)
kT2 [keV] : 199.363 (-199.996 -199.996)
R2^2/D10^2 : 4.88577E-05 (-2.53817e-05 0.22966)
------------------------------------------------------------
# Chi-Squared = 50.56 using 59 PHA bins.
# Reduced chi-squared = 0.9193 for 55 degrees of freedom
# Null hypothesis probability = 6.447872e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.517e-09 2.797e-09
25- 50 6.602e-09 4.341e-09
50-150 1.393e-08 1.446e-09
15-150 2.505e-08 8.815e-09
Plot creation:
Mon Oct 15 13:07:40 EDT 2012