batgrbproduct Analysis for Trigger=529021
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 29 10:02:45 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger529021/GCN5_download_cron
======================================================================
Trigger: 00529021 Segment: 000
BAT Trigger Time: 365207120.512 [s; MET]
Trigger Stop: 365207132.672 [s; MET]
UTC: 2012-07-28T22:25:11.035380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 137.100024602055 Dec: -54.4372942698869 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.23
Image Trigger?: NO
Rate S/N Ratio: 19.1049731745428 [ if not an image trigger ]
Image S/N Ratio: 11.23
Flight Position: [ source = BAT ]
RA: 137.100024602055 Dec: -54.4372942698869 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 137.08492288039 Dec: -54.4368681863641 [deg; J2000]
{ 09h 08m 20.4s , -54d 26' 12.7" }
+/- 1.39910886705949 [arcmin] (estimated 90% radius based on SNR)
+/- 0.507954482181344 [arcmin] (formal 1-sigma fit error)
SNR: 18.8260445213707
Angular difference between Flight and Ground position is 0.527606 arcmin
Partial Coding Fraction: 0.1347656 [ including projection effects ]
Duration
T90: 22.0479999780655 +/- 2.59457896177031
Measured from: 1.42000007629395
to: 23.4680000543594 [s; relative to TRIGTIME]
T50: 9.54399991035461 +/- 2.21706921817036
Measured from: 5.43600010871887
to: 14.9800000190735 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.3279999494553
to: 13.3279999494553 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.560000002384186
to: 26.4839999675751 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.160406 1.336054 1.011013 0.236549
0.086431 0.090292 0.079711 0.072737 [error]
Peak 0.072645 0.103380 0.054652 0.049555
0.017247 0.019077 0.015784 0.014702 [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 4.40e-07 6.77e-07 7.84e-07 1.74e-06 2.42e-06 3.64e-06 erg/cm2
Error 5.31e-08 5.04e-08 7.93e-08 3.71e-07 1.89e-07 4.37e-07 erg/cm2
Peak flux Power-law 1.01e+00 7.96e-01 4.20e-01 3.22e-01 2.38e+00 2.55e+00 ph/cm2/s
Error 3.56e-01 1.74e-01 1.30e-01 2.01e-01 5.30e-01 5.43e-01 ph/cm2/s
Fluence Cutoff-PL 4.17e-07 6.99e-07 8.00e-07 1.11e-06 3.03e-06 0.00e+00 erg/cm2
Error 6.34e-08 6.09e-08 8.59e-08 7.18e-07 7.54e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.02e+00 7.98e-01 4.20e-01 3.19e-01 2.38e+00 2.52e+00 ph/cm2/s
Error 3.56e-01 1.73e-01 1.30e-01 2.04e-01 5.30e-01 5.43e-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 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 1.789 0.130 - - 1.01e-02 7.72e-04 53.240 57
CPL 1.474 0.491 83.2 -26.7 1.46e-02 8.31e-03 52.020 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.922 0.410 - - 1.64e-02 3.91e-03 61.920 57
CPL 1.927 0.472 9999.3 0.0 1.64e-02 0.00e+00 61.930 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: 16.576000 sec.
T50 in the 50-300 keV band: 8.960000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 25.924 0.560 26.484
T90 22.048 1.420 23.468
T50 9.544 5.436 14.980
Peak 1.000 12.328 13.328
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
137.0849 -54.4369 0.0102 51.8 172.1 3.8126 18.8 TRIG_00529021
------------------------------------------
Foreground time interval of the image:
0.560 26.484 (delta_t = 25.924 [sec])
Background time interval of the image:
-239.512 -209.802 (delta_t = 29.710 [sec])
-208.512 0.560 (delta_t = 209.072 [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
Time interval is from 0.560 sec. to 26.484 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78937 ( -0.128689 0.131206 )
Norm@50keV : 1.01174E-02 ( -0.000775159 0.000769457 )
------------------------------------------------------------
# Chi-Squared = 53.24 using 59 PHA bins.
# Reduced chi-squared = 0.9341 for 57 degrees of freedom
# Null hypothesis probability = 6.168059e-01
Photon flux (15-150 keV) in 25.92 sec: 1.38846 ( -0.105537 0.105845 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.4152e-06 ( -1.88322e-07 1.89186e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.560 sec. to 26.484 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47429 ( -0.538067 0.444541 )
Epeak [keV] : 83.2241 ( -29.8051 -83.2241 )
Norm@50keV : 1.46138E-02 ( -0.00429037 0.0123217 )
------------------------------------------------------------
# Chi-Squared = 52.02 using 59 PHA bins.
# Reduced chi-squared = 0.9289 for 56 degrees of freedom
# Null hypothesis probability = 6.262217e-01
Photon flux (15-150 keV) in 25.92 sec: 1.36593 ( -0.11094 0.11103 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03064e-06 ( -5.7151e-07 9.37345e-07 ) ergs/cm2
Band function
Time interval is from 0.560 sec. to 26.484 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.44824 ( -0.390385 0.416522 )
beta : -9.36482 ( 9.99463 19.9946 )
Epeak [keV] : 81.8977 ( -81.8917 -81.8917 )
Norm@50keV : 1.49858E-02 ( -0.00502694 0.00882298 )
------------------------------------------------------------
# Chi-Squared = 52.03 using 59 PHA bins.
# Reduced chi-squared = 0.9460 for 55 degrees of freedom
# Null hypothesis probability = 5.888368e-01
Photon flux (15-150 keV) in 25.92 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] : 13.5547 (-1.22403 1.33475)
R^2/D10^2 : 0.208910 (-0.0615019 0.0878194)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 100.57 using 59 PHA bins.
# Reduced chi-squared = 1.7645 for 57 degrees of freedom
# Null hypothesis probability = 3.284361e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.107e-07 3.057e-08
25- 50 7.583e-07 7.815e-08
50-150 9.019e-07 1.371e-07
15-150 1.871e-06 1.577e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 113.969 (-13.4536 58.2475)
Norm : 5.93199 (-0.582275 0.666446)
------------------------------------------------------------
# Chi-Squared = 52.40 using 59 PHA bins.
# Reduced chi-squared = 0.9194 for 57 degrees of freedom
# Null hypothesis probability = 6.479271e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.012e-07 3.940e-08
25- 50 7.112e-07 5.534e-08
50-150 1.237e-06 1.676e-07
15-150 2.349e-06 2.096e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.46390 (-1.17512 1.5014)
R1^2/D10^2 : 3.99300 (-2.39253 7.06763)
kT2 [keV] : 20.6890 (-3.15162 4.96574)
R2^2/D10^2 : 3.55025E-02 (-0.020334 0.0331477)
------------------------------------------------------------
# Chi-Squared = 51.54 using 59 PHA bins.
# Reduced chi-squared = 0.9371 for 55 degrees of freedom
# Null hypothesis probability = 6.076727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.292e-07 1.580e-07
25- 50 6.676e-07 1.908e-07
50-150 1.232e-06 3.593e-07
15-150 2.329e-06 5.246e-07
Peak spectrum fit
Power-law model
Time interval is from 12.328 sec. to 13.328 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92226 ( -0.391379 0.429466 )
Norm@50keV : 1.64066E-02 ( -0.00402074 0.00380334 )
------------------------------------------------------------
# Chi-Squared = 61.92 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.048011e-01
Photon flux (15-150 keV) in 1 sec: 2.37709 ( -0.529519 0.530607 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50881e-07 ( -3.50142e-08 3.52185e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.328 sec. to 13.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.92715 ( -0.517439 0.426805 )
Epeak [keV] : 9999.33 ( )
Norm@50keV : 1.63888E-02 ( )
------------------------------------------------------------
# Chi-Squared = 61.93 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 56 degrees of freedom
# Null hypothesis probability = 2.729701e-01
Photon flux (15-150 keV) in 1 sec: 2.37854 ( -0.53169 0.52811 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12339e-07 ( -6.6021e-08 6.3355e-08 ) ergs/cm2
Band function
Time interval is from 12.328 sec. to 13.328 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.52142 ( 1.5232 1.5232 )
beta : -1.91290 ( 1.92206 0.391719 )
Epeak [keV] : 14.4613 ( -14.3484 -14.3484 )
Norm@50keV : 4.23039E-02 ( -0.0430485 39.9694 )
------------------------------------------------------------
# Chi-Squared = 61.93 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Null hypothesis probability = 2.425425e-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] : 10.3409 (-2.71054 4.28434)
R^2/D10^2 : 0.935297 (-0.684437 2.12214)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 72.77 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 57 degrees of freedom
# Null hypothesis probability = 7.772739e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.058e-08 1.052e-08
25- 50 5.362e-08 2.069e-08
50-150 3.081e-08 1.867e-08
15-150 1.050e-07 4.835e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.1805 (-52.1125 -98.2183)
Norm : 10.2474 (-2.93476 4.68472)
------------------------------------------------------------
# Chi-Squared = 63.77 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 57 degrees of freedom
# Null hypothesis probability = 2.505410e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.678e-08 8.585e-09
25- 50 4.614e-08 1.695e-08
50-150 7.399e-08 5.334e-08
15-150 1.469e-07 6.586e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.57628 (-2.84739 2.94868)
R1^2/D10^2 : 2.73490 (-1.75526 11.2498)
kT2 [keV] : 57.0777 (-52.5384 -75.1219)
R2^2/D10^2 : 1.97401E-03 (-0.000970591 0.0359694)
------------------------------------------------------------
# Chi-Squared = 61.78 using 59 PHA bins.
# Reduced chi-squared = 1.123 for 55 degrees of freedom
# Null hypothesis probability = 2.468090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.781e-08 1.669e-08
25- 50 4.788e-08 2.751e-08
50-150 7.422e-08 4.122e-08
15-150 1.499e-07 7.900e-08
Plot creation:
Sun Jul 29 10:25:04 EDT 2012