batgrbproduct Analysis for Trigger=528443
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 20:34:07 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger528443/GCN5_download_cron
======================================================================
Trigger: 00528443 Segment: 000
BAT Trigger Time: 364804752.32 [s; MET]
Trigger Stop: 364804756.416 [s; MET]
UTC: 2012-07-24T06:39:02.860140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.189825352394 Dec: 3.50921659187649 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.9
Image Trigger?: NO
Rate S/N Ratio: 6.32455532033676 [ if not an image trigger ]
Image S/N Ratio: 7.9
Flight Position: [ source = BAT ]
RA: 245.189825352394 Dec: 3.50921659187649 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 245.192729867495 Dec: 3.53533409169399 [deg; J2000]
{ 16h 20m 46.3s , +03d 32' 07.2" }
+/- 2.13587621748364 [arcmin] (estimated 90% radius based on SNR)
+/- 0.809696627200146 [arcmin] (formal 1-sigma fit error)
SNR: 10.2871579614077
Angular difference between Flight and Ground position is 1.576674 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 72.8320000171661 +/- 16.390123863213
Measured from: -17.175999879837
to: 55.6560001373291 [s; relative to TRIGTIME]
T50: 29.3120000362396 +/- 15.776032456915
Measured from: -4.8879998922348
to: 24.4240001440048 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.50800001621246
to: 8.50800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.272000014782
to: 64.4880000352859 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.702367 0.616000 0.177215 -0.021505
0.075837 0.068806 0.057597 0.049610 [error]
Peak 0.014143 0.038907 0.011346 -0.003420
0.008783 0.008043 0.006316 0.005519 [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 2.44e-07 2.54e-07 1.86e-07 2.20e-07 7.69e-07 9.04e-07 erg/cm2
Error 4.02e-08 3.57e-08 4.90e-08 1.08e-07 1.19e-07 1.80e-07 erg/cm2
Peak flux Power-law 2.63e-01 2.05e-01 1.08e-01 8.19e-02 6.14e-01 6.58e-01 ph/cm2/s
Error 1.23e-01 6.92e-02 4.98e-02 6.83e-02 2.08e-01 2.20e-01 ph/cm2/s
Fluence Cutoff-PL 2.23e-07 3.05e-07 1.37e-07 1.36e-08 6.78e-07 0.00e+00 erg/cm2
Error 4.52e-08 4.98e-08 6.52e-08 3.93e-08 1.13e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.63e-01 3.08e-01 9.10e-02 1.54e-03 5.63e-01 5.63e-01 ph/cm2/s
Error 1.14e-01 1.03e-01 6.41e-02 1.20e-02 2.00e-01 2.00e-01 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 4.58e-01 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 2.447 0.258 - - 9.22e-04 1.80e-04 50.750 57
CPL 0.534 1.529 27.6 7.5 1.46e-02 1.01e-01 43.550 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.938 0.517 - - 4.21e-03 1.54e-03 44.710 57
CPL -2.910 0.000 41.1 10.0 2.57e+00 0.00e+00 37.950 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 85.760 -21.272 64.488
T90 72.832 -17.176 55.656
T50 29.312 -4.888 24.424
Peak 1.000 7.508 8.508
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.1927 +3.5353 0.0186 37.5 -36.6 1.2708 10.3 TRIG_00528443
------------------------------------------
Foreground time interval of the image:
-21.272 34.581 (delta_t = 55.853 [sec])
Background time interval of the image:
-239.320 -56.620 (delta_t = 182.700 [sec])
-55.320 -21.272 (delta_t = 34.048 [sec])
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
-21.272000 43.496000
44.680000 64.488000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.44672 ( -0.247135 0.269798 )
Norm@50keV : 9.21837E-04 ( -0.000180681 0.000179268 )
------------------------------------------------------------
# Chi-Squared = 50.75 using 59 PHA bins.
# Reduced chi-squared = 0.8903 for 57 degrees of freedom
# Null hypothesis probability = 7.072306e-01
Photon flux (15-150 keV) in 84.58 sec: 0.175343 ( -0.0229599 0.0229677 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.6903e-07 ( -1.16883e-07 1.20445e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-21.272000 43.496000
44.680000 64.488000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.534120 ( -1.75827 1.29956 )
Epeak [keV] : 27.5593 ( -8.30186 6.77992 )
Norm@50keV : 1.46331E-02 ( -0.0146291 0.188094 )
------------------------------------------------------------
# Chi-Squared = 43.55 using 59 PHA bins.
# Reduced chi-squared = 0.7777 for 56 degrees of freedom
# Null hypothesis probability = 8.874109e-01
Photon flux (15-150 keV) in 84.58 sec: 0.167619 ( -0.023116 0.023224 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.78166e-07 ( -1.07854e-07 1.18458e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-21.272000 43.496000
44.680000 64.488000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.534124 ( -1.32635 1.84926 )
beta : -9.99999 ( 259371 259381 )
Epeak [keV] : 27.5523 ( -18.4346 6.79859 )
Norm@50keV : 1.46351E-02 ( -0.0146368 0.188519 )
------------------------------------------------------------
# Chi-Squared = 43.55 using 59 PHA bins.
# Reduced chi-squared = 0.7918 for 55 degrees of freedom
# Null hypothesis probability = 8.672796e-01
Photon flux (15-150 keV) in 84.58 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] : 7.85169 (-1.02927 1.16392)
R^2/D10^2 : 0.209888 (-0.0917069 0.166857)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 47.56 using 59 PHA bins.
# Reduced chi-squared = 0.8344 for 57 degrees of freedom
# Null hypothesis probability = 8.091457e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.951e-07 4.593e-08
25- 50 3.305e-07 5.925e-08
50-150 8.156e-08 3.277e-08
15-150 6.071e-07 1.114e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.0322 (-8.44994 12.3731)
Norm : 1.28768 (-0.29714 0.402149)
------------------------------------------------------------
# Chi-Squared = 44.48 using 59 PHA bins.
# Reduced chi-squared = 0.7803 for 57 degrees of freedom
# Null hypothesis probability = 8.864502e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.352e-07 3.722e-08
25- 50 2.871e-07 4.728e-08
50-150 1.843e-07 7.777e-08
15-150 7.065e-07 1.292e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.68065 (-2.49056 2.70057)
R1^2/D10^2 : 0.958345 (-0.750044 28.2429)
kT2 [keV] : 11.0095 (-8.82054 11.3408)
R2^2/D10^2 : 3.55635E-02 (-0.0352525 0.106546)
------------------------------------------------------------
# Chi-Squared = 43.09 using 59 PHA bins.
# Reduced chi-squared = 0.7835 for 55 degrees of freedom
# Null hypothesis probability = 8.779603e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.264e-07 1.232e-07
25- 50 2.988e-07 1.469e-07
50-150 1.502e-07 8.513e-08
15-150 6.754e-07 3.444e-07
Peak spectrum fit
Power-law model
Time interval is from 7.508 sec. to 8.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93766 ( -0.495608 0.5383 )
Norm@50keV : 4.21116E-03 ( -0.00154919 0.00153598 )
------------------------------------------------------------
# Chi-Squared = 44.71 using 59 PHA bins.
# Reduced chi-squared = 0.7843 for 57 degrees of freedom
# Null hypothesis probability = 8.815364e-01
Photon flux (15-150 keV) in 1 sec: 0.613621 ( -0.205171 0.20985 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.88115e-08 ( -1.37327e-08 1.4215e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.508 sec. to 8.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.91018 ( )
Epeak [keV] : 41.0720 ( -8.25169 11.7781 )
Norm@50keV : 2.56821 ( )
------------------------------------------------------------
# Chi-Squared = 37.95 using 59 PHA bins.
# Reduced chi-squared = 0.6777 for 56 degrees of freedom
# Null hypothesis probability = 9.691717e-01
Photon flux (15-150 keV) in 1 sec: 0.563300 ( -0.194455 0.204598 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.21493e-08 ( -1.04691e-08 1.21053e-08 ) ergs/cm2
Band function
Time interval is from 7.508 sec. to 8.508 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.66410 ( -15.6676 -5.86685 )
beta : -9.37166 ( 10 19.9955 )
Epeak [keV] : 41.3110 ( -7.95515 14.746 )
Norm@50keV : 1.84262 ( -1.84065 155.973 )
------------------------------------------------------------
# Chi-Squared = 37.95 using 59 PHA bins.
# Reduced chi-squared = 0.6899 for 55 degrees of freedom
# Null hypothesis probability = 9.614481e-01
Photon flux (15-150 keV) in 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] : 10.6956 (-2.38315 3.2021)
R^2/D10^2 : 0.258264 (-0.258259 0.435706)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 38.20 using 59 PHA bins.
# Reduced chi-squared = 0.6702 for 57 degrees of freedom
# Null hypothesis probability = 9.737338e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.135e-09 3.843e-09
25- 50 1.672e-08 1.046e-08
50-150 1.057e-08 7.560e-09
15-150 3.343e-08 1.820e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.1575 (-31.3687 126.945)
Norm : 3.32458 (-1.35542 2.02005)
------------------------------------------------------------
# Chi-Squared = 42.38 using 59 PHA bins.
# Reduced chi-squared = 0.7435 for 57 degrees of freedom
# Null hypothesis probability = 9.256521e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.421e-09 5.270e-09
25- 50 1.302e-08 7.960e-09
50-150 1.544e-08 1.240e-08
15-150 3.688e-08 2.349e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.0572 (-10.9779 -10.9779)
R1^2/D10^2 : 7.55822E-02 (-0.0748695 -0.0748695)
kT2 [keV] : 10.4769 (-10.6032 -10.6032)
R2^2/D10^2 : 0.186911 (-0.184944 -0.184944)
------------------------------------------------------------
# Chi-Squared = 38.20 using 59 PHA bins.
# Reduced chi-squared = 0.6946 for 55 degrees of freedom
# Null hypothesis probability = 9.587395e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.171e-09 3.861e-04
25- 50 1.674e-08 3.415e-03
50-150 1.052e-08 8.945e-02
15-150 3.343e-08 9.320e-02
Plot creation:
Tue Jul 24 20:55:29 EDT 2012