batgrbproduct Analysis for Trigger=528162
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): Sun Jul 22 12:18:43 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger528162/GCN5_download_cron
======================================================================
Trigger: 00528162 Segment: 000
BAT Trigger Time: 364639152 [s; MET]
Trigger Stop: 364639536 [s; MET]
UTC: 2012-07-22T08:39:02.547040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 288.797170088271 Dec: 10.9422908261596 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 23.15
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 23.15
Flight Position: [ source = BAT ]
RA: 288.797170088271 Dec: 10.9422908261596 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 288.796461698118 Dec: 10.9406679176634 [deg; J2000]
{ 19h 15m 11.2s , +10d 56' 26.4" }
+/- 1.33819182603797 [arcmin] (estimated 90% radius based on SNR)
+/- 0.502763730051744 [arcmin] (formal 1-sigma fit error)
SNR: 20.0621672873341
Angular difference between Flight and Ground position is 0.105940 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 384 +/- 0.0226274628537407
Measured from: 0
to: 384 [s; relative to TRIGTIME]
T50: 384 +/- 0.035777106832332
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 1.582773 1.064823 0.182015 0.056237
0.069923 0.067980 0.057297 0.048869 [error]
Peak 1.582773 1.064823 0.182015 0.056237
0.069923 0.067980 0.057297 0.048869 [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 5.19e-07 4.17e-07 2.26e-07 1.79e-07 1.24e-06 1.34e-06 erg/cm2
Error 4.89e-08 3.67e-08 4.32e-08 6.31e-08 1.05e-07 1.34e-07 erg/cm2
Peak flux Power-law 9.41e-02 4.24e-02 1.15e-02 3.87e-03 1.50e-01 1.52e-01 ph/cm2/s
Error 9.10e-03 3.58e-03 2.12e-03 1.28e-03 1.11e-02 1.12e-02 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 8.94e-02 4.58e-02 8.71e-03 1.44e-01 1.45e-01 0.00e+00 ph/cm2/s
Error 1.00e-02 4.51e-03 3.03e-03 1.18e-02 1.19e-02 0.00e+00 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 2.883 0.185 - - 5.94e-04 8.31e-05 63.170 57
CPL 1.734 0.652 7.5 0.0 3.41e-03 0.00e+00 58.100 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.883 0.185 - - 5.94e-04 8.31e-05 63.170 57
CPL 1.734 0.652 7.5 0.0 3.41e-03 0.00e+00 58.100 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)
Foreground time interval of the image:
0.000 183.061 (delta_t = 183.061 [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 183.061 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.88282 ( -0.179604 0.190485 )
Norm@50keV : 5.94260E-04 ( -8.2474e-05 8.36346e-05 )
------------------------------------------------------------
# Chi-Squared = 63.17 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.676204e-01
Photon flux (15-150 keV) in 183.1 sec: 0.150280 ( -0.0111247 0.0111344 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24175e-06 ( -1.03875e-07 1.06061e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.061 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73403 ( -1.0537 0.250395 )
Epeak [keV] : 7.50481 ( )
Norm@50keV : 3.41195E-03 ( )
------------------------------------------------------------
# Chi-Squared = 58.10 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 56 degrees of freedom
# Null hypothesis probability = 3.977015e-01
Photon flux (15-150 keV) in 183.1 sec: 0.144457 ( -0.011756 0.011825 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.061 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.70178 ( -0.55111 0.887773 )
beta : -4.75328 ( 4.89975 1.99688 )
Epeak [keV] : 8.20495 ( -4.52159 1.9423 )
Norm@50keV : 3.57090E-03 ( -0.000786591 0.0169224 )
------------------------------------------------------------
# Chi-Squared = 58.08 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 55 degrees of freedom
# Null hypothesis probability = 3.625094e-01
Photon flux (15-150 keV) in 183.1 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] : 6.20405 (-0.52097 0.56461)
R^2/D10^2 : 0.445591 (-0.14492 0.221446)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 77.64 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.593497e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.371e-07 4.870e-08
25- 50 4.684e-07 4.980e-08
50-150 4.910e-08 1.647e-08
15-150 9.547e-07 9.063e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.8265 (-3.30273 4.05985)
Norm : 1.60423 (-0.296268 0.382093)
------------------------------------------------------------
# Chi-Squared = 58.51 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.197124e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.888e-07 5.383e-08
25- 50 4.569e-07 4.843e-08
50-150 1.579e-07 4.940e-08
15-150 1.104e-06 9.640e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.89750 (-0.885449 0.907654)
R1^2/D10^2 : 2.60468 (-1.51913 5.92572)
kT2 [keV] : 10.1631 (-2.06567 3.46837)
R2^2/D10^2 : 3.18678E-02 (-0.0247143 0.0753371)
------------------------------------------------------------
# Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.160273e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.054e-07 2.648e-07
25- 50 4.418e-07 2.098e-07
50-150 1.729e-07 1.010e-07
15-150 1.120e-06 5.363e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 183.061 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.88282 ( -0.179604 0.190485 )
Norm@50keV : 5.94260E-04 ( -8.2474e-05 8.36346e-05 )
------------------------------------------------------------
# Chi-Squared = 63.17 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.676204e-01
Photon flux (15-150 keV) in 183.1 sec: 0.150280 ( -0.0111247 0.0111344 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24175e-06 ( -1.03875e-07 1.06061e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 183.061 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73403 ( -1.0537 0.250395 )
Epeak [keV] : 7.50481 ( )
Norm@50keV : 3.41195E-03 ( )
------------------------------------------------------------
# Chi-Squared = 58.10 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 56 degrees of freedom
# Null hypothesis probability = 3.977015e-01
Photon flux (15-150 keV) in 183.1 sec: 0.144457 ( -0.011756 0.011825 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 183.061 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.73324 ( -2.05548 0.635894 )
beta : -5.24921 ( 4.73502 1.82516 )
Epeak [keV] : 7.57173 ( -4.16709 1.8136 )
Norm@50keV : 3.39297E-03 ( -0.000745214 0.00937979 )
------------------------------------------------------------
# Chi-Squared = 58.09 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 55 degrees of freedom
# Null hypothesis probability = 3.622450e-01
Photon flux (15-150 keV) in 183.1 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] : 6.20405 (-0.52097 0.56461)
R^2/D10^2 : 0.445591 (-0.14492 0.221446)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 77.64 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.593497e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.371e-07 4.944e-08
25- 50 4.684e-07 5.127e-08
50-150 4.910e-08 1.509e-08
15-150 9.547e-07 8.853e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.8265 (-3.30273 4.05985)
Norm : 1.60423 (-0.296268 0.382093)
------------------------------------------------------------
# Chi-Squared = 58.51 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.197124e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.888e-07 4.861e-08
25- 50 4.569e-07 4.779e-08
50-150 1.579e-07 5.013e-08
15-150 1.104e-06 8.853e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.89750 (-0.885449 0.907654)
R1^2/D10^2 : 2.60468 (-1.51913 5.92572)
kT2 [keV] : 10.1631 (-2.06567 3.46837)
R2^2/D10^2 : 3.18678E-02 (-0.0247143 0.0753371)
------------------------------------------------------------
# Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.160273e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.054e-07 2.293e-07
25- 50 4.418e-07 2.244e-07
50-150 1.729e-07 9.833e-08
15-150 1.120e-06 5.237e-07
Plot creation:
Sun Jul 22 16:01:00 EDT 2012