batgrbproduct Analysis for Trigger=526511
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): Sat Jul 14 18:24:27 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger526511/GCN5_download_cron
======================================================================
Trigger: 00526511 Segment: 000
BAT Trigger Time: 363881824 [s; MET]
Trigger Stop: 363882912 [s; MET]
UTC: 2012-07-13T14:16:54.578580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 267.010592001549 Dec: -24.8140085837641 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.4
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.4
Flight Position: [ source = BAT ]
RA: 267.010592001549 Dec: -24.8140085837641 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 267.141475892079 Dec: -24.942899922097 [deg; J2000]
{ 17h 48m 34.0s , -24d 56' 34.4" }
+/- 7.18776897410084 [arcmin] (estimated 90% radius based on SNR)
+/- 4.82645802731862 [arcmin] (formal 1-sigma fit error)
SNR: 1.81724092560358
Angular difference between Flight and Ground position is 10.514855 arcmin
Partial Coding Fraction: 0.6328125 [ including projection effects ]
Duration
T90: 1088 +/-
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
T50: 1088 +/-
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1088 second)
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.251657 0.158983 0.043976 0.077891
0.110895 0.103697 0.088693 0.079144 [error]
Peak 0.251657 0.158983 0.043976 0.077891
0.110895 0.103697 0.088693 0.079144 [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 6.93e-08 7.37e-08 5.56e-08 6.82e-08 2.25e-07 2.67e-07 erg/cm2
Error 5.16e-08 6.18e-08 7.13e-08 2.52e-07 1.76e-07 3.74e-07 erg/cm2
Peak flux Power-law 1.24e-02 7.37e-03 2.78e-03 1.40e-03 2.33e-02 2.40e-02 ph/cm2/s
Error 9.46e-03 6.11e-03 3.45e-03 4.42e-03 1.42e-02 1.48e-02 ph/cm2/s
Fluence Cutoff-PL 6.93e-08 7.37e-08 5.55e-08 6.75e-08 2.66e-07 0.00e+00 erg/cm2
Error 5.35e-08 7.49e-08 7.13e-08 2.48e-07 3.83e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.24e-02 7.37e-03 2.77e-03 1.38e-03 2.33e-02 2.40e-02 ph/cm2/s
Error 1.11e-02 6.51e-03 4.42e-03 4.37e-03 1.42e-02 1.13e-02 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 2.406 1.815 - - 1.26e-04 1.24e-04 55.160 57
CPL 1.911 0.000 6.4 0.0 2.59e-04 0.00e+00 55.180 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.406 1.815 - - 1.26e-04 1.24e-04 55.160 57
CPL 1.911 0.000 6.4 0.0 2.59e-04 0.00e+00 55.180 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 1088.000 0.000 1088.000
T90 1088.000 0.000 1088.000
T50 1088.000 0.000 1088.000
Peak 1088.000 0.000 1088.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
267.1415 -24.9429 0.1053 32.5 164.3 0.5160 1.8 TRIG_00526511
------------------------------------------
Foreground time interval of the image:
0.000 183.015 (delta_t = 183.015 [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 0.000 sec. to 183.015 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40604 ( -1.29463 2.33524 )
Norm@50keV : 1.25638E-04 ( -0.000125638 0.000123155 )
------------------------------------------------------------
# Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 57 degrees of freedom
# Null hypothesis probability = 5.445225e-01
Photon flux (15-150 keV) in 183 sec: 2.33287E-02 ( -0.0142163 0.0142335 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.24589e-07 ( -1.5751e-07 1.95444e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.015 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91139 ( )
Epeak [keV] : 6.42669 ( )
Norm@50keV : 2.58874E-04 ( )
------------------------------------------------------------
# Chi-Squared = 55.18 using 59 PHA bins.
# Reduced chi-squared = 0.9853 for 56 degrees of freedom
# Null hypothesis probability = 5.059463e-01
Photon flux (15-150 keV) in 183 sec: 2.33184E-02 ( -0.0141925 0.0141874 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66086e-07 ( -2.66086e-07 5.00897e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.015 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.20905 ( 1.75004 1.75004 )
beta : -2.53386 ( 2.94383 11.1939 )
Epeak [keV] : 19.0183 ( -12.8767 -12.8767 )
Norm@50keV : 0.776460 ( -0.81248 159.333 )
------------------------------------------------------------
# Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.703437e-01
Photon flux (15-150 keV) in 183 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] : 7.49715 (-7.50877 9.75271)
R^2/D10^2 : 3.26947E-02 (-0.0323999 4.28297)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.77 using 59 PHA bins.
# Reduced chi-squared = 0.9784 for 57 degrees of freedom
# Null hypothesis probability = 5.212976e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.770e-08 4.010e-08
25- 50 8.993e-08 6.570e-08
50-150 1.898e-08 1.972e-08
15-150 1.666e-07 1.180e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 33.6626 (-33.6626 -33.6626)
Norm : 0.169976 (-0.169976 1.57417)
------------------------------------------------------------
# Chi-Squared = 55.23 using 59 PHA bins.
# Reduced chi-squared = 0.9689 for 57 degrees of freedom
# Null hypothesis probability = 5.418967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.684e-08 4.742e-08
25- 50 8.116e-08 5.826e-08
50-150 5.142e-08 5.059e-08
15-150 1.994e-07 1.434e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.40930 (-3.4072 -3.4072)
R1^2/D10^2 : 0.650819 (-0.653175 -0.653175)
kT2 [keV] : 11.2126 (-11.2084 -11.2084)
R2^2/D10^2 : 4.76057E-03 (-0.00476972 1.78542)
------------------------------------------------------------
# Chi-Squared = 55.10 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.709420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.020e-08 3.492e-08
25- 50 7.708e-08 5.207e-08
50-150 4.799e-08 4.101e-08
15-150 1.953e-07 1.168e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 183.015 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40604 ( -1.29463 2.33524 )
Norm@50keV : 1.25638E-04 ( -0.000125638 0.000123155 )
------------------------------------------------------------
# Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 57 degrees of freedom
# Null hypothesis probability = 5.445225e-01
Photon flux (15-150 keV) in 183 sec: 2.33287E-02 ( -0.0142163 0.0142335 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.24589e-07 ( -1.5751e-07 1.95444e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.015 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91139 ( )
Epeak [keV] : 6.42669 ( )
Norm@50keV : 2.58874E-04 ( )
------------------------------------------------------------
# Chi-Squared = 55.18 using 59 PHA bins.
# Reduced chi-squared = 0.9853 for 56 degrees of freedom
# Null hypothesis probability = 5.059463e-01
Photon flux (15-150 keV) in 183 sec: 2.33184E-02 ( -0.0141925 0.0141874 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.66086e-07 ( -2.66086e-07 4.73884e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.015 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.20905 ( 1.75004 1.75004 )
beta : -2.53386 ( 2.94383 11.1939 )
Epeak [keV] : 19.0183 ( -12.8767 -12.8767 )
Norm@50keV : 0.776460 ( -0.81248 159.333 )
------------------------------------------------------------
# Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.703437e-01
Photon flux (15-150 keV) in 183 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] : 7.49715 (-7.50877 9.75271)
R^2/D10^2 : 3.26947E-02 (-0.0323999 4.28297)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.77 using 59 PHA bins.
# Reduced chi-squared = 0.9784 for 57 degrees of freedom
# Null hypothesis probability = 5.212976e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.770e-08 3.958e-08
25- 50 8.993e-08 6.421e-08
50-150 1.898e-08 1.769e-08
15-150 1.666e-07 1.174e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 33.6626 (-33.6626 -33.6626)
Norm : 0.169976 (-0.169976 1.57417)
------------------------------------------------------------
# Chi-Squared = 55.23 using 59 PHA bins.
# Reduced chi-squared = 0.9689 for 57 degrees of freedom
# Null hypothesis probability = 5.418967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.684e-08 4.451e-08
25- 50 8.116e-08 5.930e-08
50-150 5.142e-08 5.176e-08
15-150 1.994e-07 1.451e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.40930 (-3.4072 -3.4072)
R1^2/D10^2 : 0.650819 (-0.653175 -0.653175)
kT2 [keV] : 11.2126 (-11.2084 -11.2084)
R2^2/D10^2 : 4.76057E-03 (-0.00476972 1.78542)
------------------------------------------------------------
# Chi-Squared = 55.10 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.709420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.020e-08 5.283e-08
25- 50 7.708e-08 5.356e-08
50-150 4.799e-08 4.789e-08
15-150 1.953e-07 1.240e-07
Plot creation:
Sat Jul 14 18:30:42 EDT 2012