batgrbproduct Analysis for Trigger=535026
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 Oct 2 10:11:30 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger535026/GCN5_download_cron
======================================================================
Trigger: 00535026 Segment: 000
BAT Trigger Time: 370808592 [s; MET]
Trigger Stop: 370808656 [s; MET]
UTC: 2012-10-01T18:23:02.288260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 276.032542704368 Dec: -5.66707146788107 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.79
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.79
Flight Position: [ source = BAT ]
RA: 276.032542704368 Dec: -5.66707146788107 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 276.027945729489 Dec: -5.66657007655332 [deg; J2000]
{ 18h 24m 06.7s , -05d 39' 59.7" }
+/- 1.50842336459321 [arcmin] (estimated 90% radius based on SNR)
+/- 0.636967560978012 [arcmin] (formal 1-sigma fit error)
SNR: 16.9077245758322
Angular difference between Flight and Ground position is 0.276114 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 147.799999952316 +/- 20.5720781771927
Measured from: -22.8319998979568
to: 124.968000054359 [s; relative to TRIGTIME]
T50: 56.5359999537468 +/- 24.9824732801672
Measured from: -1.74799990653992
to: 54.7880000472069 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.27200001478195
to: 4.27200001478195 [s; relative to TRIGTIME]
Total Fluence
Measured from: -27.727999985218
to: 144.944000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.755142 0.974463 0.782228 0.212381
0.084538 0.075673 0.063173 0.054159 [error]
Peak 0.016930 0.021945 0.014839 0.004124
0.007062 0.005898 0.004856 0.004224 [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 1.91e-07 3.89e-07 6.17e-07 2.17e-06 1.72e-06 3.37e-06 erg/cm2
Error 3.04e-08 3.59e-08 6.12e-08 4.97e-07 1.52e-07 5.31e-07 erg/cm2
Peak flux Power-law 1.73e-01 1.55e-01 9.47e-02 8.80e-02 4.60e-01 5.11e-01 ph/cm2/s
Error 8.48e-02 4.77e-02 3.94e-02 7.65e-02 1.40e-01 1.53e-01 ph/cm2/s
Fluence Cutoff-PL 1.91e-07 3.90e-07 6.18e-07 2.15e-06 3.35e-06 0.00e+00 erg/cm2
Error 3.38e-08 3.82e-08 6.44e-08 8.66e-07 8.83e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.61e-01 1.62e-01 9.70e-02 5.05e-02 4.49e-01 4.70e-01 ph/cm2/s
Error 8.43e-02 5.59e-02 4.38e-02 8.98e-02 1.46e-01 1.75e-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 4.64e-01 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 1.335 0.150 - - 1.01e-03 8.14e-05 86.590 57
CPL 1.331 0.370 9991.4 0.0 1.02e-03 5.92e-04 86.590 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.707 0.562 - - 3.46e-03 1.12e-03 47.520 57
CPL 1.232 1.817 76.8 0.0 6.13e-03 8.42e-02 47.330 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: 191.616000 sec.
T50 in the 50-300 keV band: 87.872000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 172.672 -27.728 144.944
T90 147.800 -22.832 124.968
T50 56.536 -1.748 54.788
Peak 1.000 3.272 4.272
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
276.0279 -5.6666 0.0114 12.3 20.1 2.1369 16.9 TRIG_00535026
------------------------------------------
Foreground time interval of the image:
-27.728 72.301 (delta_t = 100.029 [sec])
Background time interval of the image:
-239.000 -27.728 (delta_t = 211.272 [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 -27.728 sec. to 144.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33499 ( -0.151088 0.149382 )
Norm@50keV : 1.01342E-03 ( -8.13692e-05 8.13553e-05 )
------------------------------------------------------------
# Chi-Squared = 86.59 using 59 PHA bins.
# Reduced chi-squared = 1.519 for 57 degrees of freedom
# Null hypothesis probability = 6.961771e-03
Photon flux (15-150 keV) in 172.7 sec: 0.121718 ( -0.0102995 0.0103505 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71519e-06 ( -1.50998e-07 1.52041e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -27.728 sec. to 144.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33144 ( -0.522234 0.21842 )
Epeak [keV] : 9991.41 ( )
Norm@50keV : 1.01744E-03 ( -0.000292926 0.000890893 )
------------------------------------------------------------
# Chi-Squared = 86.59 using 59 PHA bins.
# Reduced chi-squared = 1.546 for 56 degrees of freedom
# Null hypothesis probability = 5.432459e-03
Photon flux (15-150 keV) in 172.7 sec: 0.121692 ( -0.010306 0.010316 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34558e-06 ( -1.19488e-06 5.71171e-07 ) ergs/cm2
Band function
Time interval is from -27.728 sec. to 144.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.88943 ( -19.2536 -19.2536 )
beta : -1.36577 ( -0.163016 0.160084 )
Epeak [keV] : 22.7642 ( -22.7599 5.72766 )
Norm@50keV : 133.512 ( -38.198 33.3152 )
------------------------------------------------------------
# Chi-Squared = 85.90 using 59 PHA bins.
# Reduced chi-squared = 1.562 for 55 degrees of freedom
# Null hypothesis probability = 4.842517e-03
Photon flux (15-150 keV) in 172.7 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] : 17.4450 ( )
R^2/D10^2 : 8.22588E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 122.21 using 59 PHA bins.
# Reduced chi-squared = 2.1440 for 57 degrees of freedom
# Null hypothesis probability = 1.179316e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.740e-08 1.608e-08
25- 50 3.947e-07 4.870e-08
50-150 8.644e-07 1.490e-07
15-150 1.346e-06 1.380e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.996 ( )
Norm : 0.507256 (-0.507256 -0.507256)
------------------------------------------------------------
# Chi-Squared = 93.39 using 59 PHA bins.
# Reduced chi-squared = 1.638 for 57 degrees of freedom
# Null hypothesis probability = 1.688438e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.182e-07 1.149e-07
25- 50 4.197e-07 2.202e-07
50-150 9.204e-07 4.845e-07
15-150 1.558e-06 8.136e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.32921 (-2.57269 1.48149)
R1^2/D10^2 : 6.76404E-02 (-0.0391921 0.102464)
kT2 [keV] : 35.3131 (-10.9493 43.1311)
R2^2/D10^2 : 6.54745E-04 (-0.000565298 0.00162359)
------------------------------------------------------------
# Chi-Squared = 88.24 using 59 PHA bins.
# Reduced chi-squared = 1.604 for 55 degrees of freedom
# Null hypothesis probability = 2.966269e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.706e-07 5.445e-08
25- 50 4.128e-07 1.429e-07
50-150 1.141e-06 5.594e-07
15-150 1.725e-06 6.546e-07
Peak spectrum fit
Power-law model
Time interval is from 3.272 sec. to 4.272 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70666 ( -0.545894 0.578642 )
Norm@50keV : 3.45579E-03 ( -0.00114519 0.00109985 )
------------------------------------------------------------
# Chi-Squared = 47.52 using 59 PHA bins.
# Reduced chi-squared = 0.8337 for 57 degrees of freedom
# Null hypothesis probability = 8.103292e-01
Photon flux (15-150 keV) in 1 sec: 0.460042 ( -0.139688 0.140698 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.198e-08 ( -1.06115e-08 1.10549e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.272 sec. to 4.272 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23182 ( -2.71028 0.924551 )
Epeak [keV] : 76.7632 ( -76.7595 -76.7595 )
Norm@50keV : 6.13406E-03 ( -0.00613441 0.162354 )
------------------------------------------------------------
# Chi-Squared = 47.33 using 59 PHA bins.
# Reduced chi-squared = 0.8453 for 56 degrees of freedom
# Null hypothesis probability = 7.885688e-01
Photon flux (15-150 keV) in 1 sec: 0.449270 ( -0.145898 0.146007 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.74872e-08 ( -1.78366e-08 4.51641e-08 ) ergs/cm2
Band function
Time interval is from 3.272 sec. to 4.272 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23204 ( 1.21748 2.7029 )
beta : -10.00000 ( 3.293e+11 3.293e+11 )
Epeak [keV] : 76.7682 ( -75.091 -76.747 )
Norm@50keV : 6.13152E-03 ( -0.00377643 0.16313 )
------------------------------------------------------------
# Chi-Squared = 47.33 using 59 PHA bins.
# Reduced chi-squared = 0.8606 for 55 degrees of freedom
# Null hypothesis probability = 7.591406e-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] : 13.2251 (-4.80104 7.62532)
R^2/D10^2 : 7.65125E-02 (-0.0756385 0.325525)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.8798 for 57 degrees of freedom
# Null hypothesis probability = 7.279079e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.837e-09 1.760e-09
25- 50 9.952e-09 6.090e-09
50-150 1.112e-08 8.130e-09
15-150 2.390e-08 1.548e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 128.439 ( )
Norm : 1.92937 (-0.63071 1.07585)
------------------------------------------------------------
# Chi-Squared = 47.34 using 59 PHA bins.
# Reduced chi-squared = 0.8305 for 57 degrees of freedom
# Null hypothesis probability = 8.154338e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.579e-09 2.684e-09
25- 50 8.771e-09 5.225e-09
50-150 1.901e-08 1.114e-08
15-150 3.236e-08 1.915e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.12854 (-4.88244 6.93487)
R1^2/D10^2 : 0.843319 (-0.788409 1796.57)
kT2 [keV] : 22.6036 (-20.6612 -22.6423)
R2^2/D10^2 : 8.72654E-03 (-0.00865655 0.0960317)
------------------------------------------------------------
# Chi-Squared = 46.93 using 59 PHA bins.
# Reduced chi-squared = 0.8533 for 55 degrees of freedom
# Null hypothesis probability = 7.721226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.151e-09 3.316e-09
25- 50 8.904e-09 4.917e-09
50-150 1.716e-08 1.260e-08
15-150 3.122e-08 1.632e-08
Plot creation:
Tue Oct 2 10:30:05 EDT 2012