batgrbproduct Analysis for Trigger=528411
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 Jul 24 18:14:31 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger528411/batgroup_hand_proc
======================================================================
Trigger: 00528411 Segment: 000
BAT Trigger Time: 364783224 [s; MET]
Trigger Stop: 364783544 [s; MET]
UTC: 2012-07-24T00:40:14.541040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 280.237276411493 Dec: -5.60718375727331 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.81
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.81
Flight Position: [ source = BAT ]
RA: 280.237276411493 Dec: -5.60718375727331 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 280.276592914903 Dec: -5.61706236967582 [deg; J2000]
{ 18h 41m 06.4s , -05d 37' 01.4" }
+/- 2.92209874811142 [arcmin] (estimated 90% radius based on SNR)
+/- 1.54800770007056 [arcmin] (formal 1-sigma fit error)
SNR: 6.57415543848635
Angular difference between Flight and Ground position is 2.421348 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.753979 0.812305 0.119472 0.028619
0.109713 0.108497 0.102724 0.106005 [error]
Peak 0.753979 0.812305 0.119472 0.028619
0.109713 0.108497 0.102724 0.106005 [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 2.81e-07 2.67e-07 1.76e-07 1.81e-07 7.98e-07 9.06e-07 erg/cm2
Error 5.55e-08 5.67e-08 7.51e-08 1.44e-07 1.81e-07 2.64e-07 erg/cm2
Peak flux Power-law 2.90e-02 1.54e-02 5.08e-03 2.17e-03 5.06e-02 5.16e-02 ph/cm2/s
Error 5.84e-03 3.14e-03 2.10e-03 1.61e-03 8.68e-03 8.99e-03 ph/cm2/s
Fluence Cutoff-PL 2.71e-07 3.17e-07 6.90e-08 1.25e-09 6.58e-07 0.00e+00 erg/cm2
Error 6.21e-08 7.70e-08 9.62e-08 4.46e-08 1.66e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.73e-02 1.85e-02 2.23e-03 2.20e-05 4.81e-02 4.81e-02 ph/cm2/s
Error 6.60e-03 4.36e-03 2.83e-03 6.18e-04 8.55e-03 8.51e-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 2.597 0.392 - - 2.43e-04 7.68e-05 54.490 57
CPL -0.776 3.289 25.0 15.2 5.02e-02 0.00e+00 50.640 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.597 0.392 - - 2.43e-04 7.68e-05 54.490 57
CPL -0.776 3.289 25.0 15.2 5.02e-02 0.00e+00 50.640 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.2766 -5.6171 0.0292 33.1880 -15.5256 1.7506558 6.574 TRIG_00528411
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [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
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.59727 ( -0.362847 0.422073 )
Norm@50keV : 2.42577E-04 ( -7.56485e-05 7.78847e-05 )
------------------------------------------------------------
# Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 57 degrees of freedom
# Null hypothesis probability = 5.698166e-01
Photon flux (15-150 keV) in 320 sec: 5.06405E-02 ( -0.0086732 0.00868777 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.98314e-07 ( -1.74118e-07 1.88038e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.775590 ( -4.82513 1.75252 )
Epeak [keV] : 24.9742 ( -23.2771 7.11282 )
Norm@50keV : 5.01673E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.64 using 59 PHA bins.
# Reduced chi-squared = 0.9043 for 56 degrees of freedom
# Null hypothesis probability = 6.772406e-01
Photon flux (15-150 keV) in 320 sec: 4.80912E-02 ( -0.0084593 0.0086358 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58061e-07 ( -1.34355e-07 1.98128e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.167260 ( -1.36656 2.86244 )
beta : -9.99994 ( 54206.9 54216.9 )
Epeak [keV] : 23.3307 ( -21.1237 6.80022 )
Norm@50keV : 1.10453E-02 ( -0.0134567 19.3883 )
------------------------------------------------------------
# Chi-Squared = 50.68 using 59 PHA bins.
# Reduced chi-squared = 0.9214 for 55 degrees of freedom
# Null hypothesis probability = 6.403385e-01
Photon flux (15-150 keV) in 320 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] : 6.62288 (-1.03 1.20618)
R^2/D10^2 : 0.124125 (-0.0629541 0.131274)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 57 degrees of freedom
# Null hypothesis probability = 7.014746e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.633e-07 9.109e-08
25- 50 3.231e-07 1.082e-07
50-150 4.363e-08 2.710e-08
15-150 6.300e-07 1.774e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1589 (-8.26765 13.7968)
Norm : 0.464502 (-0.147579 0.23881)
------------------------------------------------------------
# Chi-Squared = 51.52 using 59 PHA bins.
# Reduced chi-squared = 0.9039 for 57 degrees of freedom
# Null hypothesis probability = 6.800090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.801e-07 6.686e-08
25- 50 2.954e-07 1.022e-07
50-150 1.341e-07 9.173e-08
15-150 7.097e-07 1.906e-07
Double BB
R1^2/D10^2 : 95.9567 ( )
kT2 [keV] : 7.02261 (-1.2214 -6.99195)
R2^2/D10^2 : 9.24576E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.03 using 59 PHA bins.
# Chi-Squared = 49.97 using 59 PHA bins.
# Chi-Squared = 49.95 using 59 PHA bins.
# Reduced chi-squared = 0.9096 for 55 degrees of freedom
# Reduced chi-squared = 0.9085 for 55 degrees of freedom
# Reduced chi-squared = 0.9083 for 55 degrees of freedom
# Null hypothesis probability = 6.645004e-01
# Null hypothesis probability = 6.668763e-01
# Null hypothesis probability = 6.673141e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.659e-07 1.425e-07
25- 50 3.237e-07 1.816e-07
50-150 5.700e-08 3.963e-08
15-150 6.466e-07 3.491e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.59727 ( -0.362847 0.422073 )
Norm@50keV : 2.42577E-04 ( -7.56485e-05 7.78847e-05 )
------------------------------------------------------------
# Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 57 degrees of freedom
# Null hypothesis probability = 5.698166e-01
Photon flux (15-150 keV) in 320 sec: 5.06405E-02 ( -0.0086732 0.00868777 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.98314e-07 ( -1.74118e-07 1.88038e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.775590 ( -4.82513 1.75252 )
Epeak [keV] : 24.9742 ( -23.2771 7.11282 )
Norm@50keV : 5.01673E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.64 using 59 PHA bins.
# Reduced chi-squared = 0.9043 for 56 degrees of freedom
# Null hypothesis probability = 6.772406e-01
Photon flux (15-150 keV) in 320 sec: 4.80912E-02 ( -0.0084593 0.0086358 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58061e-07 ( -1.34355e-07 1.98128e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.167260 ( -1.36656 2.86244 )
beta : -9.99994 ( 54206.9 54216.9 )
Epeak [keV] : 23.3307 ( -21.0443 6.80022 )
Norm@50keV : 1.10453E-02 ( -0.0134567 19.379 )
------------------------------------------------------------
# Chi-Squared = 50.68 using 59 PHA bins.
# Reduced chi-squared = 0.9214 for 55 degrees of freedom
# Null hypothesis probability = 6.403385e-01
Photon flux (15-150 keV) in 320 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] : 6.62288 (-1.03 1.20618)
R^2/D10^2 : 0.124125 (-0.0629541 0.131274)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 57 degrees of freedom
# Null hypothesis probability = 7.014746e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.633e-07 9.086e-08
25- 50 3.231e-07 1.033e-07
50-150 4.363e-08 2.596e-08
15-150 6.300e-07 1.942e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1589 (-8.26765 13.7968)
Norm : 0.464502 (-0.147579 0.23881)
------------------------------------------------------------
# Chi-Squared = 51.52 using 59 PHA bins.
# Reduced chi-squared = 0.9039 for 57 degrees of freedom
# Null hypothesis probability = 6.800090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.801e-07 6.915e-08
25- 50 2.954e-07 9.003e-08
50-150 1.341e-07 8.655e-08
15-150 7.097e-07 2.139e-07
Double BB
R1^2/D10^2 : 95.9567 ( )
kT2 [keV] : 7.02261 (-1.2214 -6.99195)
R2^2/D10^2 : 9.24576E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.03 using 59 PHA bins.
# Chi-Squared = 49.97 using 59 PHA bins.
# Chi-Squared = 49.95 using 59 PHA bins.
# Reduced chi-squared = 0.9096 for 55 degrees of freedom
# Reduced chi-squared = 0.9085 for 55 degrees of freedom
# Reduced chi-squared = 0.9083 for 55 degrees of freedom
# Null hypothesis probability = 6.645004e-01
# Null hypothesis probability = 6.668763e-01
# Null hypothesis probability = 6.673141e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.659e-07 1.383e-07
25- 50 3.237e-07 1.949e-07
50-150 5.700e-08 4.038e-08
15-150 6.466e-07 3.499e-07
Plot creation:
Tue Jul 24 22:11:05 EDT 2012