batgrbproduct Analysis for Trigger=522245
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 May 15 01:50:51 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger522245/GCN5_download_cron
======================================================================
Trigger: 00522245 Segment: 000
BAT Trigger Time: 358707248 [s; MET]
Trigger Stop: 358707312 [s; MET]
UTC: 2012-05-14T16:53:59.792900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 257.31331331995 Dec: -36.2824252520167 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.84
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.84
Flight Position: [ source = BAT ]
RA: 257.31331331995 Dec: -36.2824252520167 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 257.329578084488 Dec: -36.2982503790971 [deg; J2000]
{ 17h 09m 19.1s , -36d 17' 53.7" }
+/- 2.93014970071635 [arcmin] (estimated 90% radius based on SNR)
+/- 1.70463466388694 [arcmin] (formal 1-sigma fit error)
SNR: 6.54836590551516
Angular difference between Flight and Ground position is 1.233001 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.152187 0.179465 0.105737 0.046401
0.048311 0.044746 0.038370 0.034500 [error]
Peak 0.152187 0.179465 0.105737 0.046401
0.048311 0.044746 0.038370 0.034500 [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 4.51e-08 6.74e-08 7.54e-08 1.60e-07 2.36e-07 3.47e-07 erg/cm2
Error 1.81e-08 1.93e-08 3.44e-08 1.51e-07 8.14e-08 1.87e-07 erg/cm2
Peak flux Power-law 2.29e-02 1.89e-02 1.05e-02 8.69e-03 5.61e-02 6.10e-02 ph/cm2/s
Error 9.36e-03 5.38e-03 4.65e-03 7.57e-03 1.60e-02 1.78e-02 ph/cm2/s
Fluence Cutoff-PL 4.17e-08 7.77e-08 6.80e-08 2.45e-08 2.12e-07 0.00e+00 erg/cm2
Error 1.98e-08 2.74e-08 5.52e-08 1.62e-07 1.97e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.09e-02 2.16e-02 9.85e-03 1.85e-03 5.38e-02 5.42e-02 ph/cm2/s
Error 1.03e-02 7.56e-03 7.75e-03 7.87e-03 1.63e-02 1.89e-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 5.91e-02 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 1.839 0.520 - - 4.01e-04 1.37e-04 58.430 57
CPL 0.647 2.859 45.2 0.0 2.05e-03 0.00e+00 57.550 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.839 0.520 - - 4.01e-04 1.37e-04 58.430 57
CPL 0.647 2.859 45.2 0.0 2.05e-03 0.00e+00 57.550 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
257.3296 -36.2983 0.0293 10.1 20.4 0.6287 6.5 TRIG_00522245
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83944 ( -0.495835 0.545135 )
Norm@50keV : 4.01135E-04 ( -0.000139889 0.000134488 )
------------------------------------------------------------
# Chi-Squared = 58.43 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.226396e-01
Photon flux (15-150 keV) in 64 sec: 5.61433E-02 ( -0.016032 0.0160393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36103e-07 ( -7.88166e-08 8.39712e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.646728 ( -4.20377 1.51501 )
Epeak [keV] : 45.1913 ( )
Norm@50keV : 2.05161E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.177472e-01
Photon flux (15-150 keV) in 64 sec: 5.38397E-02 ( -0.0161804 0.0164808 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11889e-07 ( -8.45203e-08 3.09712e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.21241 ( 0.665602 2.83106 )
beta : -2.43721 ( 10 20 )
Epeak [keV] : 29.4872 ( -18.9167 757.689 )
Norm@50keV : 6.68180 ( -9.08228 2.72869 )
------------------------------------------------------------
# Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.268113e-01
Photon flux (15-150 keV) in 64 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] : 9.87582 (-2.84385 4.4593)
R^2/D10^2 : 2.82684E-02 (-0.0282091 0.0755614)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.87 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.069854e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.578e-08 2.239e-08
25- 50 8.739e-08 5.229e-08
50-150 4.398e-08 2.986e-08
15-150 1.672e-07 1.009e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.2836 (-45.3606 -79.2817)
Norm : 0.267111 (-0.0912713 0.156338)
------------------------------------------------------------
# Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.472735e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.433e-08 2.698e-08
25- 50 7.282e-08 4.346e-08
50-150 1.022e-07 8.656e-08
15-150 2.193e-07 1.552e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.61506 (-6.74878 5.22542)
R1^2/D10^2 : 8.88407E-02 (-0.0880567 -0.0880567)
kT2 [keV] : 19.6452 (-20.8442 -20.8442)
R2^2/D10^2 : 1.22468E-03 (-0.0010771 0.0533485)
------------------------------------------------------------
# Chi-Squared = 56.88 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.048948e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.342e-08 2.866e-08
25- 50 7.487e-08 4.288e-08
50-150 8.865e-08 5.315e-08
15-150 2.069e-07 1.081e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83944 ( -0.495835 0.545135 )
Norm@50keV : 4.01135E-04 ( -0.000139889 0.000134488 )
------------------------------------------------------------
# Chi-Squared = 58.43 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.226396e-01
Photon flux (15-150 keV) in 64 sec: 5.61433E-02 ( -0.016032 0.0160393 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36103e-07 ( -7.88166e-08 8.39712e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.646728 ( -4.20377 1.5144 )
Epeak [keV] : 45.1913 ( )
Norm@50keV : 2.05161E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.177472e-01
Photon flux (15-150 keV) in 64 sec: 5.38397E-02 ( -0.0161804 0.0164808 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11889e-07 ( -8.45203e-08 3.09712e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.21241 ( 0.665602 2.83106 )
beta : -2.43721 ( 10 20 )
Epeak [keV] : 29.4872 ( -18.9167 757.69 )
Norm@50keV : 6.68180 ( -9.08228 2.72692 )
------------------------------------------------------------
# Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.268113e-01
Photon flux (15-150 keV) in 64 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] : 9.87582 (-2.84385 4.4593)
R^2/D10^2 : 2.82684E-02 (-0.0282091 0.0755614)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.87 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.069854e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.578e-08 2.139e-08
25- 50 8.739e-08 5.244e-08
50-150 4.398e-08 3.089e-08
15-150 1.672e-07 8.881e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.2836 (-45.3606 -79.2817)
Norm : 0.267111 (-0.0912713 0.156338)
------------------------------------------------------------
# Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.472735e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.433e-08 2.743e-08
25- 50 7.282e-08 4.493e-08
50-150 1.022e-07 8.701e-08
15-150 2.193e-07 1.493e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.61506 (-6.74878 5.22542)
R1^2/D10^2 : 8.88407E-02 (-0.0880567 -0.0880567)
kT2 [keV] : 19.6452 (-20.8442 -20.8442)
R2^2/D10^2 : 1.22468E-03 (-0.0010771 0.0533485)
------------------------------------------------------------
# Chi-Squared = 56.88 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 55 degrees of freedom
# Null hypothesis probability = 4.048948e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.342e-08 2.835e-08
25- 50 7.487e-08 5.005e-08
50-150 8.865e-08 5.360e-08
15-150 2.069e-07 1.201e-07
Plot creation:
Tue May 15 02:10:28 EDT 2012