batgrbproduct Analysis for Trigger=526283
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): Wed Jul 11 18:11:51 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger526283/GCN5_download_cron
======================================================================
Trigger: 00526283 Segment: 000
BAT Trigger Time: 363691152 [s; MET]
Trigger Stop: 363691536 [s; MET]
UTC: 2012-07-11T09:19:02.586520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 270.29471033621 Dec: -25.0958403885661 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.71
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.71
Flight Position: [ source = BAT ]
RA: 270.29471033621 Dec: -25.0958403885661 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 270.236975194758 Dec: -25.0861062514162 [deg; J2000]
{ 18h 00m 56.9s , -25d 05' 10.0" }
+/- 3.06642264742169 [arcmin] (estimated 90% radius based on SNR)
+/- 1.86699656765467 [arcmin] (formal 1-sigma fit error)
SNR: 6.13662788042712
Angular difference between Flight and Ground position is 3.191122 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
T50: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 384 second)
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.575314 0.260308 0.219258 -0.076911
0.124188 0.114330 0.098678 0.089160 [error]
Peak 1.575314 0.260308 0.219258 -0.076911
0.124188 0.114330 0.098678 0.089160 [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 4.56e-07 1.20e-07 1.67e-08 2.62e-09 5.94e-07 5.95e-07 erg/cm2
Error 7.18e-08 5.53e-08 1.84e-08 6.05e-09 1.13e-07 1.14e-07 erg/cm2
Peak flux Power-law 4.11e-02 6.24e-03 4.35e-04 3.23e-05 4.78e-02 4.78e-02 ph/cm2/s
Error 6.58e-03 2.72e-03 4.65e-04 7.03e-05 7.65e-03 7.65e-03 ph/cm2/s
Fluence Cutoff-PL 4.56e-07 1.20e-07 1.66e-08 2.59e-09 5.94e-07 0.00e+00 erg/cm2
Error 7.15e-08 6.44e-08 2.11e-08 6.00e-09 1.18e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.10e-02 6.23e-03 4.34e-04 3.20e-05 4.77e-02 4.77e-02 ph/cm2/s
Error 6.57e-03 2.72e-03 5.34e-04 6.94e-05 7.55e-03 7.55e-03 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 4.844 0.833 - - 3.59e-05 3.05e-05 52.670 57
CPL 1.701 0.000 1.9 0.0 1.62e-02 0.00e+00 53.530 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.844 0.833 - - 3.59e-05 3.05e-05 52.670 57
CPL 1.701 0.000 1.9 0.0 1.62e-02 0.00e+00 53.530 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 384.000 0.000 384.000
T90 384.000 0.000 384.000
T50 384.000 0.000 384.000
Peak 384.000 0.000 384.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
270.2370 -25.0861 0.0313 5.6 153.0 1.8703 6.1 TRIG_00526283
------------------------------------------
Foreground time interval of the image:
0.000 142.410 (delta_t = 142.410 [sec])
143.000 384.000 (delta_t = 241.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 142.410000
143.000000 384.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.84359 ( -0.770798 0.895079 )
Norm@50keV : 3.59120E-05 ( -2.18633e-05 3.91412e-05 )
------------------------------------------------------------
# Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9241 for 57 degrees of freedom
# Null hypothesis probability = 6.379915e-01
Photon flux (15-150 keV) in 383.4 sec: 4.77687E-02 ( -0.00763465 0.00766128 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.94101e-07 ( -1.09294e-07 1.16761e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 142.410000
143.000000 384.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70110 ( )
Epeak [keV] : 1.88796 ( )
Norm@50keV : 1.62163E-02 ( )
------------------------------------------------------------
# Chi-Squared = 53.53 using 59 PHA bins.
# Reduced chi-squared = 0.9559 for 56 degrees of freedom
# Null hypothesis probability = 5.690021e-01
Photon flux (15-150 keV) in 383.4 sec: 4.77277E-02 ( -0.0076384 0.0074706 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.94496e-07 ( -1.18271e-07 1.18267e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 142.410000
143.000000 384.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.21509 ( 12.9027 8.61872 )
beta : -4.84365 ( -0.894972 0.769981 )
Epeak [keV] : 268.523 ( -268.523 -268.523 )
Norm@50keV : 4.88064E-03 ( -0.00297155 0.00531983 )
------------------------------------------------------------
# Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9577 for 55 degrees of freedom
# Null hypothesis probability = 5.640434e-01
Photon flux (15-150 keV) in 383.4 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] : 2.88029 (-0.463938 0.556033)
R^2/D10^2 : 8.59822 (-8.59904 20.3734)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.60 using 59 PHA bins.
# Reduced chi-squared = 0.9579 for 57 degrees of freedom
# Null hypothesis probability = 5.656698e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.764e-07 2.678e-07
25- 50 6.010e-08 3.543e-08
50-150 6.907e-11 7.148e-11
15-150 5.366e-07 2.879e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.78350 (-1.41317 2.09108)
Norm : 6.59401 (-3.85667 10.969)
------------------------------------------------------------
# Chi-Squared = 53.61 using 59 PHA bins.
# Reduced chi-squared = 0.9405 for 57 degrees of freedom
# Null hypothesis probability = 6.030933e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.699e-07 1.930e-07
25- 50 8.118e-08 4.258e-08
50-150 8.350e-10 8.526e-10
15-150 5.519e-07 2.506e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.68698 (-0.481199 0.549821)
R1^2/D10^2 : 13.0417 (-6.54274 39.709)
kT2 [keV] : 18.2121 (-11.2499 42.179)
R2^2/D10^2 : 5.51457E-04 (-0.000531667 0.00682104)
------------------------------------------------------------
# Chi-Squared = 50.26 using 59 PHA bins.
# Reduced chi-squared = 0.9138 for 55 degrees of freedom
# Null hypothesis probability = 6.559463e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.699e-07 2.526e-07
25- 50 1.097e-07 5.722e-08
50-150 1.576e-07 1.317e-07
15-150 7.372e-07 4.067e-07
Peak spectrum fit
Power-law model
Time interval is from 143.000 sec. to 384.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.84359 ( -0.770798 0.895079 )
Norm@50keV : 3.59120E-05 ( -2.18633e-05 3.91412e-05 )
------------------------------------------------------------
# Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9241 for 57 degrees of freedom
# Null hypothesis probability = 6.379915e-01
Photon flux (15-150 keV) in 383.4 sec: 4.77687E-02 ( -0.00763465 0.00766128 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.94101e-07 ( -1.09294e-07 1.16761e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 143.000 sec. to 384.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70110 ( )
Epeak [keV] : 1.88796 ( )
Norm@50keV : 1.62163E-02 ( )
------------------------------------------------------------
# Chi-Squared = 53.53 using 59 PHA bins.
# Reduced chi-squared = 0.9559 for 56 degrees of freedom
# Null hypothesis probability = 5.690021e-01
Photon flux (15-150 keV) in 383.4 sec: 4.77277E-02 ( -0.0076384 0.0074706 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.94496e-07 ( -1.18271e-07 1.18267e-07 ) ergs/cm2
Band function
Time interval is from 143.000 sec. to 384.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.21509 ( 12.9027 8.61872 )
beta : -4.84365 ( -0.894972 0.769981 )
Epeak [keV] : 268.523 ( -268.523 -268.523 )
Norm@50keV : 4.88064E-03 ( -0.00297155 0.00531983 )
------------------------------------------------------------
# Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9577 for 55 degrees of freedom
# Null hypothesis probability = 5.640434e-01
Photon flux (15-150 keV) in 383.4 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] : 2.88029 (-0.463938 0.556033)
R^2/D10^2 : 8.59822 (-8.59904 20.3734)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.60 using 59 PHA bins.
# Reduced chi-squared = 0.9579 for 57 degrees of freedom
# Null hypothesis probability = 5.656698e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.764e-07 2.208e-07
25- 50 6.010e-08 3.650e-08
50-150 6.907e-11 7.271e-11
15-150 5.366e-07 2.859e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.78350 (-1.41317 2.09108)
Norm : 6.59401 (-3.85667 10.969)
------------------------------------------------------------
# Chi-Squared = 53.61 using 59 PHA bins.
# Reduced chi-squared = 0.9405 for 57 degrees of freedom
# Null hypothesis probability = 6.030933e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.699e-07 2.218e-07
25- 50 8.118e-08 4.262e-08
50-150 8.350e-10 8.662e-10
15-150 5.519e-07 2.334e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.68698 (-0.481199 0.549821)
R1^2/D10^2 : 13.0417 (-6.54274 39.709)
kT2 [keV] : 18.2121 (-11.2388 42.1531)
R2^2/D10^2 : 5.51457E-04 (-0.000531667 0.00652447)
------------------------------------------------------------
# Chi-Squared = 50.26 using 59 PHA bins.
# Reduced chi-squared = 0.9138 for 55 degrees of freedom
# Null hypothesis probability = 6.559463e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.699e-07 2.564e-07
25- 50 1.097e-07 6.075e-08
50-150 1.576e-07 1.455e-07
15-150 7.372e-07 3.787e-07
Plot creation:
Wed Jul 11 18:33:27 EDT 2012