batgrbproduct Analysis for Trigger=534815
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): Fri Sep 28 10:27:24 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger534815/GCN5_download_cron
======================================================================
Trigger: 00534815 Segment: 000
BAT Trigger Time: 370478456 [s; MET]
Trigger Stop: 370478520 [s; MET]
UTC: 2012-09-27T22:40:46.302240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 136.600410032008 Dec: 0.417375483965046 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.92
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 18.92
Flight Position: [ source = BAT ]
RA: 136.600410032008 Dec: 0.417375483965046 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 136.605582308039 Dec: 0.420406470473726 [deg; J2000]
{ 09h 06m 25.3s , +00d 25' 13.5" }
+/- 0.881470234026098 [arcmin] (estimated 90% radius based on SNR)
+/- 0.320715777716777 [arcmin] (formal 1-sigma fit error)
SNR: 36.4244635002114
Angular difference between Flight and Ground position is 0.359689 arcmin
Partial Coding Fraction: 0.6484375 [ including projection effects ]
Duration
T90: 43.3559999465942 +/- 18.8572639594741
Measured from: -14.7799998521805
to: 28.5760000944138 [s; relative to TRIGTIME]
T50: 16.4799999594688 +/- 1.68170510544785
Measured from: -3.93599987030029
to: 12.5440000891685 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -3.92799997329712
to: -2.92799997329712 [s; relative to TRIGTIME]
Total Fluence
Measured from: -37.9399999976158
to: 41.0400000214577 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.070991 1.669429 1.117764 0.183942
0.059822 0.062482 0.054945 0.047318 [error]
Peak 0.050276 0.068007 0.058277 0.017913
0.007361 0.008055 0.007055 0.005673 [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 3.99e-07 6.75e-07 8.68e-07 2.25e-06 2.56e-06 4.19e-06 erg/cm2
Error 3.08e-08 3.26e-08 5.33e-08 2.88e-07 1.29e-07 3.32e-07 erg/cm2
Peak flux Power-law 5.20e-01 5.19e-01 3.63e-01 4.02e-01 1.56e+00 1.80e+00 ph/cm2/s
Error 1.05e-01 6.74e-02 5.59e-02 1.23e-01 1.95e-01 2.24e-01 ph/cm2/s
Fluence Cutoff-PL 3.39e-07 7.44e-07 9.04e-07 6.44e-07 2.63e-06 0.00e+00 erg/cm2
Error 3.66e-08 4.15e-08 6.13e-08 2.57e-07 2.87e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.68e-01 5.55e-01 3.84e-01 2.06e-01 1.53e+00 1.61e+00 ph/cm2/s
Error 1.22e-01 8.28e-02 6.46e-02 1.86e-01 1.98e-01 2.68e-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 1.62e+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 1.637 0.079 - - 3.48e-03 1.66e-04 77.300 57
CPL 0.630 0.378 66.1 9.6 1.14e-02 5.26e-03 50.980 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.516 0.201 - - 1.25e-02 1.56e-03 57.440 57
CPL 0.871 0.825 87.2 -29.9 2.67e-02 3.29e-02 55.400 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: 26.880000 sec.
T50 in the 50-300 keV band: 13.632000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 78.980 -37.940 41.040
T90 43.356 -14.780 28.576
T50 16.480 -3.936 12.544
Peak 1.000 -3.928 -2.928
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
136.6056 +0.4204 0.0053 37.2 -15.1 4.0232 36.4 TRIG_00534815
------------------------------------------
Foreground time interval of the image:
-14.699 41.040 (delta_t = 55.739 [sec])
Background time interval of the image:
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 -37.940 sec. to 41.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63697 ( -0.0783417 0.0787761 )
Norm@50keV : 3.48190E-03 ( -0.000166387 0.000166012 )
------------------------------------------------------------
# Chi-Squared = 77.30 using 59 PHA bins.
# Reduced chi-squared = 1.356 for 57 degrees of freedom
# Null hypothesis probability = 3.800485e-02
Photon flux (15-150 keV) in 78.98 sec: 0.452716 ( -0.0217392 0.0217718 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56105e-06 ( -1.2903e-07 1.29522e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -37.940 sec. to 41.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.630192 ( -0.394931 0.360845 )
Epeak [keV] : 66.0879 ( -7.20689 11.8961 )
Norm@50keV : 1.14306E-02 ( -0.00389505 0.0066309 )
------------------------------------------------------------
# Chi-Squared = 50.98 using 59 PHA bins.
# Reduced chi-squared = 0.9103 for 56 degrees of freedom
# Null hypothesis probability = 6.650448e-01
Photon flux (15-150 keV) in 78.98 sec: 0.431766 ( -0.022827 0.022859 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6322e-06 ( -2.46157e-07 3.28486e-07 ) ergs/cm2
Band function
Time interval is from -37.940 sec. to 41.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.630069 ( -0.289302 0.43402 )
beta : -10.00000 ( 1.04723e+09 1.04723e+09 )
Epeak [keV] : 66.0741 ( -7.20581 11.8942 )
Norm@50keV : 1.14323E-02 ( -0.00389676 0.00663559 )
------------------------------------------------------------
# Chi-Squared = 50.97 using 59 PHA bins.
# Reduced chi-squared = 0.9268 for 55 degrees of freedom
# Null hypothesis probability = 6.291321e-01
Photon flux (15-150 keV) in 78.98 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] : 13.7599 (-0.726589 0.771606)
R^2/D10^2 : 6.88472E-02 (-0.0125093 0.0151698)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 106.01 using 59 PHA bins.
# Reduced chi-squared = 1.8599 for 57 degrees of freedom
# Null hypothesis probability = 8.746810e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.178e-07 1.832e-08
25- 50 7.960e-07 4.656e-08
50-150 9.835e-07 9.596e-08
15-150 1.997e-06 1.023e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 146.139 (17.4621 82.6259)
Norm : 1.89219 (-0.103187 0.111872)
------------------------------------------------------------
# Chi-Squared = 60.09 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 57 degrees of freedom
# Null hypothesis probability = 3.646205e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.847e-07 2.922e-08
25- 50 7.103e-07 3.451e-08
50-150 1.387e-06 1.663e-07
15-150 2.482e-06 1.619e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.81733 (-1.35396 1.42237)
R1^2/D10^2 : 0.311562 (-0.117948 0.239551)
kT2 [keV] : 22.6491 (-3.54315 5.85928)
R2^2/D10^2 : 7.86203E-03 (-0.00479713 0.00836968)
------------------------------------------------------------
# Chi-Squared = 47.94 using 59 PHA bins.
# Reduced chi-squared = 0.8717 for 55 degrees of freedom
# Null hypothesis probability = 7.387547e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.253e-07 6.840e-08
25- 50 7.618e-07 1.228e-07
50-150 1.308e-06 3.949e-07
15-150 2.395e-06 5.454e-07
Peak spectrum fit
Power-law model
Time interval is from -3.928 sec. to -2.928 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51595 ( -0.199241 0.201926 )
Norm@50keV : 1.24544E-02 ( -0.00156873 0.00155972 )
------------------------------------------------------------
# Chi-Squared = 57.44 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.588870e-01
Photon flux (15-150 keV) in 1 sec: 1.56155 ( -0.19467 0.194939 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17847e-07 ( -1.59747e-08 1.61131e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.928 sec. to -2.928 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.871404 ( -0.924213 0.725665 )
Epeak [keV] : 87.1625 ( -27.3231 -87.1625 )
Norm@50keV : 2.66656E-02 ( -0.0149616 0.050915 )
------------------------------------------------------------
# Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 56 degrees of freedom
# Null hypothesis probability = 4.973601e-01
Photon flux (15-150 keV) in 1 sec: 1.53230 ( -0.19834 0.19828 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39797e-07 ( -3.5698e-08 8.976e-08 ) ergs/cm2
Band function
Time interval is from -3.928 sec. to -2.928 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.871349 ( 1.05063 0.499319 )
beta : -10.00000 ( 8.54698e+10 8.54698e+10 )
Epeak [keV] : 87.1455 ( -27.8464 -87.1455 )
Norm@50keV : 2.66658E-02 ( -0.0152104 0.050949 )
------------------------------------------------------------
# Chi-Squared = 55.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.593632e-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] : 14.6892 (-2.14505 2.57408)
R^2/D10^2 : 0.195379 (-0.0852664 0.146746)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 68.28 using 59 PHA bins.
# Reduced chi-squared = 1.198 for 57 degrees of freedom
# Null hypothesis probability = 1.455683e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.855e-09 2.100e-09
25- 50 3.450e-08 5.805e-09
50-150 5.019e-08 1.210e-08
15-150 9.354e-08 1.456e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-81.6739 -199.978)
Norm : 6.43476 (-0.782478 0.783549)
------------------------------------------------------------
# Chi-Squared = 56.06 using 59 PHA bins.
# Reduced chi-squared = 0.9835 for 57 degrees of freedom
# Null hypothesis probability = 5.102766e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.602e-08 8.465e-09
25- 50 3.082e-08 1.653e-08
50-150 6.760e-08 3.656e-08
15-150 1.144e-07 6.185e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.37309 (-2.60652 3.24115)
R1^2/D10^2 : 1.32110 (-0.879354 4.49461)
kT2 [keV] : 25.0432 (-6.97708 21.4221)
R2^2/D10^2 : 2.23665E-02 (-0.0197602 0.0577741)
------------------------------------------------------------
# Chi-Squared = 54.51 using 59 PHA bins.
# Reduced chi-squared = 0.9912 for 55 degrees of freedom
# Null hypothesis probability = 4.931440e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.457e-08 8.208e-09
25- 50 3.217e-08 1.679e-08
50-150 6.793e-08 3.920e-08
15-150 1.147e-07 6.010e-08
Plot creation:
Fri Sep 28 10:56:48 EDT 2012