batgrbproduct Analysis for Trigger=525068
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): Mon Jun 25 15:24:39 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger525068/batgroup_hand_proc
======================================================================
Trigger: 00525068 Segment: 000
BAT Trigger Time: 362269182.016 [s; MET]
Trigger Stop: 362269183.04 [s; MET]
UTC: 2012-06-24T22:19:33.661820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 170.941840070123 Dec: 8.93369375766324 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.74
Image Trigger?: NO
Rate S/N Ratio: 21.2602916254693 [ if not an image trigger ]
Image S/N Ratio: 7.74
Flight Position: [ source = BAT ]
RA: 170.941840070123 Dec: 8.93369375766324 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 170.885823209073 Dec: 8.93344703534538 [deg; J2000]
{ 11h 23m 32.6s , +08d 56' 00.4" }
+/- 0.594522118352906 [arcmin] (estimated 90% radius based on SNR)
+/- 0.16718524542301 [arcmin] (formal 1-sigma fit error)
SNR: 63.9345332784032
Angular difference between Flight and Ground position is 3.320272 arcmin
Partial Coding Fraction: 0.8671875 [ including projection effects ]
Duration
T90: 179.775999963284 +/- 1.50842962750644
Measured from: 7.09600001573563
to: 186.871999979019 [s; relative to TRIGTIME]
T50: 130.271999955177 +/- 1.5483306832747
Measured from: 37.2760000228882
to: 167.547999978065 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 138.056000053883
to: 139.056000053883 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.12399995327
to: 192.752000033855 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.267126 14.349143 13.644224 4.249589
0.108532 0.118263 0.114333 0.094197 [error]
Peak 0.141671 0.241466 0.262258 0.072653
0.008457 0.010134 0.010342 0.008043 [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 2.58e-06 5.82e-06 1.04e-05 4.36e-05 2.83e-05 6.23e-05 erg/cm2
Error 8.70e-08 1.15e-07 1.50e-07 1.55e-06 3.92e-07 1.57e-06 erg/cm2
Peak flux Power-law 1.25e+00 1.66e+00 1.62e+00 2.83e+00 5.47e+00 7.37e+00 ph/cm2/s
Error 1.10e-01 8.86e-02 8.25e-02 3.09e-01 2.46e-01 3.73e-01 ph/cm2/s
Fluence Cutoff-PL 2.57e-06 5.82e-06 1.04e-05 4.29e-05 6.17e-05 0.00e+00 erg/cm2
Error 1.19e-07 1.16e-07 1.88e-07 3.79e-06 3.78e-06 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.09e+00 1.72e+00 1.73e+00 1.67e+00 5.35e+00 6.20e+00 ph/cm2/s
Error 1.42e-01 9.81e-02 1.04e-01 5.21e-01 2.57e-01 5.81e-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 1.165 0.027 - - 1.33e-02 1.97e-04 36.440 57
CPL 1.107 0.085 983.9 0.0 1.40e-02 7.26e-04 36.380 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.037 0.078 - - 4.74e-02 2.11e-03 68.320 57
CPL 0.488 0.350 155.7 94.2 8.39e-02 3.07e-02 60.210 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: 179.968000 sec.
T50 in the 50-300 keV band: 129.344000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 207.876 -15.124 192.752
T90 179.776 7.096 186.872
T50 130.272 37.276 167.548
Peak 1.000 138.056 139.056
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
170.8858 8.9334 0.0030 15.6834 -108.9350 23.0652301 63.935 TRIG_00525068
Foreground time interval of the image:
-15.124 139.885 (delta_t = 155.009 [sec])
Background time interval of the image:
-60.016 -15.124 (delta_t = 44.892 [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 -15.124 sec. to 192.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16539 ( -0.027056 0.0269604 )
Norm@50keV : 1.32748E-02 ( -0.000197302 0.000196693 )
------------------------------------------------------------
# Chi-Squared = 36.44 using 59 PHA bins.
# Reduced chi-squared = 0.6393 for 57 degrees of freedom
# Null hypothesis probability = 9.845523e-01
Photon flux (15-150 keV) in 207.9 sec: 1.55102 ( -0.0254637 0.0255799 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82806e-05 ( -3.91946e-07 3.91987e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.124 sec. to 192.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10722 ( -0.122964 0.0463021 )
Epeak [keV] : 983.915 ( )
Norm@50keV : 1.39873E-02 ( -0.000340488 0.00111242 )
------------------------------------------------------------
# Chi-Squared = 36.38 using 59 PHA bins.
# Reduced chi-squared = 0.6496 for 56 degrees of freedom
# Null hypothesis probability = 9.805201e-01
Photon flux (15-150 keV) in 207.9 sec: 1.54991 ( -0.03231 0.02533 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.17301e-05 ( -5.70124e-06 1.85987e-06 ) ergs/cm2
Band function
Time interval is from -15.124 sec. to 192.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.679299 ( 0.783123 5.72321 )
beta : -1.16694 ( 1.16681 0.0276037 )
Epeak [keV] : 66.4269 ( -66.3243 401.525 )
Norm@50keV : 3.06154E-02 ( -0.0176425 0 )
------------------------------------------------------------
# Chi-Squared = 36.27 using 59 PHA bins.
# Reduced chi-squared = 0.6595 for 55 degrees of freedom
# Null hypothesis probability = 9.759065e-01
Photon flux (15-150 keV) in 207.9 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] : 23.0985 ( )
R^2/D10^2 : 4.41251E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 905.27 using 59 PHA bins.
# Reduced chi-squared = 15.882 for 57 degrees of freedom
# Null hypothesis probability = 5.293129e-153
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.852e-07 2.557e-08
25- 50 4.814e-06 1.102e-07
50-150 1.918e-05 3.586e-07
15-150 2.488e-05 3.430e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 6.91498 ( )
------------------------------------------------------------
# Chi-Squared = 793.94 using 59 PHA bins.
# Reduced chi-squared = 13.929 for 57 degrees of freedom
# Null hypothesis probability = 2.171056e-130
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.580e-06 1.807e-06
25- 50 6.886e-06 3.473e-06
50-150 1.510e-05 7.608e-06
15-150 2.557e-05 1.288e-05
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.05323 (-0.608485 0.643023)
R1^2/D10^2 : 0.539886 (-0.104644 0.137763)
kT2 [keV] : 37.2226 (-2.24002 2.73324)
R2^2/D10^2 : 8.16621E-03 (-0.00164709 0.00183072)
------------------------------------------------------------
# Chi-Squared = 57.56 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 55 degrees of freedom
# Null hypothesis probability = 3.804929e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.116e-06 1.216e-07
25- 50 5.985e-06 1.778e-07
50-150 2.008e-05 5.156e-07
15-150 2.818e-05 6.549e-07
Peak spectrum fit
Power-law model
Time interval is from 138.056 sec. to 139.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03671 ( -0.077827 0.0775426 )
Norm@50keV : 4.74291E-02 ( -0.00210675 0.00210644 )
------------------------------------------------------------
# Chi-Squared = 68.32 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 57 degrees of freedom
# Null hypothesis probability = 1.448353e-01
Photon flux (15-150 keV) in 1 sec: 5.47266 ( -0.246364 0.24646 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.06368e-07 ( -2.55238e-08 2.62627e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 138.056 sec. to 139.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.488145 ( -0.363808 0.3357 )
Epeak [keV] : 155.685 ( -40.5269 147.835 )
Norm@50keV : 8.39312E-02 ( -0.0242347 0.0371607 )
------------------------------------------------------------
# Chi-Squared = 60.21 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.259126e-01
Photon flux (15-150 keV) in 1 sec: 5.34932 ( -0.25776 0.25719 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.84765e-07 ( -1.41715e-07 2.22505e-07 ) ergs/cm2
Band function
Time interval is from 138.056 sec. to 139.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99998 ( -77682.2 -77682.2 )
beta : -1.04805 ( -0.0858382 0.0799096 )
Epeak [keV] : 22.3870 ( -22.1739 6.27793 )
Norm@50keV : 6292.05 ( -6705.67 8.05495e+06 )
------------------------------------------------------------
# Chi-Squared = 67.80 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 55 degrees of freedom
# Null hypothesis probability = 1.151851e-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] : 20.7135 (-1.16081 1.25797)
R^2/D10^2 : 0.238553 (-0.0404796 0.0477689)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 111.16 using 59 PHA bins.
# Reduced chi-squared = 1.9502 for 57 degrees of freedom
# Null hypothesis probability = 2.354746e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.945e-08 1.805e-09
25- 50 9.911e-08 5.945e-09
50-150 3.166e-07 2.535e-08
15-150 4.351e-07 2.515e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 21.8577 ( )
------------------------------------------------------------
# Chi-Squared = 177.30 using 59 PHA bins.
# Reduced chi-squared = 3.1105 for 57 degrees of freedom
# Null hypothesis probability = 2.889072e-14
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.443e-08 2.830e-08
25- 50 1.047e-07 5.430e-08
50-150 2.296e-07 1.190e-07
15-150 3.887e-07 2.013e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.65552 (-1.98474 2.91214)
R1^2/D10^2 : 3.59071 (-2.37263 9.89799)
kT2 [keV] : 26.8945 (-3.13647 5.81332)
R2^2/D10^2 : 9.31613E-02 (-0.0470164 0.0378068)
------------------------------------------------------------
# Chi-Squared = 62.35 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 55 degrees of freedom
# Null hypothesis probability = 2.312604e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.542e-08 1.123e-08
25- 50 9.608e-08 1.607e-08
50-150 3.538e-07 4.355e-08
15-150 4.853e-07 5.630e-08
Plot creation:
Mon Jun 25 15:38:04 EDT 2012