batgrbproduct Analysis for Trigger=529686
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): Sat Aug 4 13:02:35 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger529686/GCN5_download_cron
======================================================================
Trigger: 00529686 Segment: 000
BAT Trigger Time: 365734463.936 [s; MET]
Trigger Stop: 365734464 [s; MET]
UTC: 2012-08-04T00:54:14.437420 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 233.929598045314 Dec: -28.7609483594276 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.68
Image Trigger?: NO
Rate S/N Ratio: 33.3466640010661 [ if not an image trigger ]
Image S/N Ratio: 10.68
Flight Position: [ source = BAT ]
RA: 233.929598045314 Dec: -28.7609483594276 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 233.9505012301 Dec: -28.7683774474401 [deg; J2000]
{ 15h 35m 48.1s , -28d 46' 06.2" }
+/- 1.01233187584666 [arcmin] (estimated 90% radius based on SNR)
+/- 0.353246654303951 [arcmin] (formal 1-sigma fit error)
SNR: 29.8891951141452
Angular difference between Flight and Ground position is 1.186352 arcmin
Partial Coding Fraction: 0.2402344 [ including projection effects ]
Duration
T90: 0.807999968528748 +/- 0.0832345620352619
Measured from: -0.0799998641014099
to: 0.728000104427338 [s; relative to TRIGTIME]
T50: 0.351999938488007 +/- 0.0282842864203588
Measured from: 0.0880001187324524
to: 0.440000057220459 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.163999974727631
to: 0.836000025272369 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.163999974727631
to: 0.832000017166138 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.263985 0.446574 0.419312 0.106396
0.017574 0.020171 0.019069 0.012642 [error]
Peak 0.265054 0.447202 0.419291 0.105833
0.017590 0.020186 0.019089 0.012655 [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 9.84e-08 2.00e-07 3.16e-07 1.11e-06 8.77e-07 1.72e-06 erg/cm2
Error 8.91e-09 1.10e-08 1.80e-08 1.38e-07 4.54e-08 1.49e-07 erg/cm2
Peak flux Power-law 3.17e+00 3.51e+00 2.77e+00 3.60e+00 1.08e+01 1.31e+01 ph/cm2/s
Error 2.92e-01 1.99e-01 1.53e-01 4.14e-01 5.51e-01 6.38e-01 ph/cm2/s
Fluence Cutoff-PL 9.07e-08 2.06e-07 3.29e-07 6.98e-07 1.32e-06 0.00e+00 erg/cm2
Error 1.10e-08 1.25e-08 2.16e-08 2.84e-07 2.81e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.91e+00 3.60e+00 2.89e+00 2.54e+00 1.06e+01 1.19e+01 ph/cm2/s
Error 3.63e-01 2.19e-01 1.91e-01 7.95e-01 5.68e-01 9.84e-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 1.339 0.082 - - 9.00e-02 4.35e-03 59.680 57
CPL 0.972 0.334 156.0 305.4 1.33e-01 4.76e-02 55.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.343 0.082 - - 8.97e-02 4.33e-03 59.060 57
CPL 0.978 0.334 156.1 320.6 1.32e-01 4.74e-02 55.300 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: 0.704000 sec.
T50 in the 50-300 keV band: 0.320000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.996 -0.164 0.832
T90 0.808 -0.080 0.728
T50 0.352 0.088 0.440
Peak 1.000 -0.164 0.836
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
233.9505 -28.7684 0.0064 42.4 -47.0 1.3263 29.9 TRIG_00529686
------------------------------------------
Foreground time interval of the image:
-0.164 0.832 (delta_t = 0.996 [sec])
Background time interval of the image:
-239.936 -57.071 (delta_t = 182.865 [sec])
-55.936 -0.164 (delta_t = 55.772 [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 -0.164 sec. to 0.832 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33888 ( -0.0818764 0.0818095 )
Norm@50keV : 8.99554E-02 ( -0.00434588 0.00434588 )
------------------------------------------------------------
# Chi-Squared = 59.68 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.785494e-01
Photon flux (15-150 keV) in 0.996 sec: 10.8126 ( -0.552225 0.55317 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.77263e-07 ( -4.53142e-08 4.53863e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.164 sec. to 0.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.971597 ( -0.346528 0.322074 )
Epeak [keV] : 156.040 ( -50.1201 560.725 )
Norm@50keV : 0.133099 ( -0.0378915 0.0573296 )
------------------------------------------------------------
# Chi-Squared = 55.85 using 59 PHA bins.
# Reduced chi-squared = 0.9974 for 56 degrees of freedom
# Null hypothesis probability = 4.803309e-01
Photon flux (15-150 keV) in 0.996 sec: 10.6523 ( -0.5684 0.5693 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32379e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.164 sec. to 0.832 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.795785 ( -0.413568 3.6929 )
beta : -1.55152 ( 1.55119 0.220606 )
Epeak [keV] : 108.764 ( -54.2801 416.927 )
Norm@50keV : 0.168449 ( -0.0715067 0.605161 )
------------------------------------------------------------
# Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.483156e-01
Photon flux (15-150 keV) in 0.996 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] : 18.2174 ( )
R^2/D10^2 : 0.663537 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 139.00 using 59 PHA bins.
# Reduced chi-squared = 2.4386 for 57 degrees of freedom
# Null hypothesis probability = 8.408725e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.374e-08 3.929e-09
25- 50 2.041e-07 1.504e-08
50-150 4.932e-07 3.994e-08
15-150 7.411e-07 4.452e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.993 ( )
Norm : 45.4193 (-45.4193 -45.4193)
------------------------------------------------------------
# Chi-Squared = 78.30 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 57 degrees of freedom
# Null hypothesis probability = 3.213200e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.127e-07 5.822e-08
25- 50 2.167e-07 1.118e-07
50-150 4.753e-07 2.472e-07
15-150 8.047e-07 4.162e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.08649 (-1.55965 1.80217)
R1^2/D10^2 : 5.95690 (-2.66091 5.9475)
kT2 [keV] : 29.7514 (-4.56564 8.15905)
R2^2/D10^2 : 0.100442 (-0.0571487 0.0850798)
------------------------------------------------------------
# Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.882198e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.464e-08 1.729e-08
25- 50 2.117e-07 3.187e-08
50-150 5.712e-07 1.171e-07
15-150 8.675e-07 1.254e-07
Peak spectrum fit
Power-law model
Time interval is from -0.164 sec. to 0.836 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34263 ( -0.0819633 0.0818492 )
Norm@50keV : 8.96888E-02 ( -0.00433419 0.00433419 )
------------------------------------------------------------
# Chi-Squared = 59.06 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 4.001286e-01
Photon flux (15-150 keV) in 1 sec: 10.7887 ( -0.55104 0.551965 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.77429e-07 ( -4.53568e-08 4.54321e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.164 sec. to 0.836 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.978130 ( -0.346497 0.32206 )
Epeak [keV] : 156.088 ( -50.3753 590.767 )
Norm@50keV : 0.132355 ( -0.0377081 0.0570813 )
------------------------------------------------------------
# Chi-Squared = 55.30 using 59 PHA bins.
# Reduced chi-squared = 0.9874 for 56 degrees of freedom
# Null hypothesis probability = 5.014403e-01
Photon flux (15-150 keV) in 1 sec: 10.6295 ( -0.5672 0.5681 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32338e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.164 sec. to 0.836 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.801757 ( -0.510633 5.79158 )
beta : -1.55304 ( 1.55289 0.22067 )
Epeak [keV] : 108.438 ( -54.1612 437.975 )
Norm@50keV : 0.167678 ( -0.0711019 0.59246 )
------------------------------------------------------------
# Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.691897e-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] : 18.1594 ( )
R^2/D10^2 : 0.668411 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 138.84 using 59 PHA bins.
# Reduced chi-squared = 2.4359 for 57 degrees of freedom
# Null hypothesis probability = 8.825810e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.401e-08 4.760e-09
25- 50 2.049e-07 1.445e-08
50-150 4.915e-07 3.945e-08
15-150 7.403e-07 4.535e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.993 ( )
Norm : 45.3002 (-45.3002 -45.3002)
------------------------------------------------------------
# Chi-Squared = 77.00 using 59 PHA bins.
# Reduced chi-squared = 1.351 for 57 degrees of freedom
# Null hypothesis probability = 3.994665e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.128e-07 5.785e-08
25- 50 2.170e-07 1.119e-07
50-150 4.760e-07 2.451e-07
15-150 8.058e-07 4.154e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.07749 (-1.54584 1.78246)
R1^2/D10^2 : 5.98818 (-2.66842 5.92304)
kT2 [keV] : 29.7424 (-4.55442 8.09737)
R2^2/D10^2 : 0.100005 (-0.0567735 0.0846197)
------------------------------------------------------------
# Chi-Squared = 56.74 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.100336e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.507e-08 1.583e-08
25- 50 2.122e-07 3.290e-08
50-150 5.705e-07 1.079e-07
15-150 8.677e-07 1.505e-07
Plot creation:
Sat Aug 4 13:26:07 EDT 2012