batgrbproduct Analysis for Trigger=557508
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): Thu Jun 6 17:12:35 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557508/GCN5_download_cron
======================================================================
Trigger: 00557508 Segment: 000
BAT Trigger Time: 392168512.704 [s; MET]
Trigger Stop: 392168513.728 [s; MET]
UTC: 2013-06-05T23:41:42.063620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 134.523928520347 Dec: -33.4893087735771 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.75
Image Trigger?: NO
Rate S/N Ratio: 17.1172427686237 [ if not an image trigger ]
Image S/N Ratio: 7.75
Flight Position: [ source = BAT ]
RA: 134.523928520347 Dec: -33.4893087735771 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 134.536105627198 Dec: -33.4767994970423 [deg; J2000]
{ 08h 58m 08.7s , -33d 28' 36.5" }
+/- 1.68848029778923 [arcmin] (estimated 90% radius based on SNR)
+/- 0.687055146717144 [arcmin] (formal 1-sigma fit error)
SNR: 14.3920976823773
Angular difference between Flight and Ground position is 0.966787 arcmin
Partial Coding Fraction: 0.05224609 [ including projection effects ]
Duration
T90: 12.6240000128746 +/- 3.12468366788104
Measured from: -4.7199998497963
to: 7.90400016307831 [s; relative to TRIGTIME]
T50: 4.27200001478195 +/- 1.20269029140124
Measured from: -0.223999857902527
to: 4.04800015687943 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.139999985694885
to: 0.860000014305115 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.48000001907349
to: 9.18400001525879 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.959451 1.515118 1.160823 0.300871
0.120017 0.132013 0.118204 0.100475 [error]
Peak 0.128907 0.173134 0.300080 0.069479
0.033247 0.036353 0.041966 0.032105 [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 3.82e-07 6.69e-07 8.96e-07 2.46e-06 2.61e-06 4.41e-06 erg/cm2
Error 6.20e-08 6.72e-08 1.15e-07 6.72e-07 2.78e-07 7.64e-07 erg/cm2
Peak flux Power-law 1.01e+00 1.28e+00 1.19e+00 1.93e+00 4.13e+00 5.41e+00 ph/cm2/s
Error 4.75e-01 3.44e-01 2.84e-01 1.08e+00 8.98e-01 1.22e+00 ph/cm2/s
Fluence Cutoff-PL 3.59e-07 6.95e-07 9.22e-07 1.49e-06 2.55e-06 3.47e-06 erg/cm2
Error 7.48e-08 8.23e-08 1.28e-07 1.00e-06 2.98e-07 1.45e-06 erg/cm2
Peak flux Cutoff-PL 1.03e+00 1.29e+00 1.18e+00 1.88e+00 4.15e+00 5.38e+00 ph/cm2/s
Error 5.24e-01 3.36e-01 3.08e-01 1.13e+00 9.00e-01 9.54e-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 1.578 0.168 - - 1.78e-02 1.76e-03 60.510 57
CPL 1.221 0.598 111.2 0.0 2.68e-02 0.00e+00 59.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.108 0.428 - - 3.55e-02 7.41e-03 61.480 57
CPL 1.124 0.434 9999.4 0.0 3.56e-02 3.29e-02 61.500 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: 9.472000 sec.
T50 in the 50-300 keV band: 4.032000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.664 -6.480 9.184
T90 12.624 -4.720 7.904
T50 4.272 -0.224 4.048
Peak 1.000 -0.140 0.860
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
134.5361 -33.4768 0.0134 42.7 -110.5 4.4156 14.4 TRIG_00557508
------------------------------------------
Foreground time interval of the image:
-6.480 9.184 (delta_t = 15.664 [sec])
Background time interval of the image:
-60.704 -6.480 (delta_t = 54.224 [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 -6.480 sec. to 9.184 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57833 ( -0.166093 0.169016 )
Norm@50keV : 1.77546E-02 ( -0.00176615 0.00175528 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.51 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 57 degrees of freedom
# Null hypothesis probability = 3.504621e-01
Photon flux (15-150 keV) in 15.66 sec: 2.26650 ( -0.224161 0.224575 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60736e-06 ( -2.77401e-07 2.79321e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.480 sec. to 9.184 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22113 ( -0.750843 0.444786 )
Epeak [keV] : 111.250 ( )
Norm@50keV : 2.67853E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.66 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 56 degrees of freedom
# Null hypothesis probability = 3.440217e-01
Photon flux (15-150 keV) in 15.66 sec: 2.23210 ( -0.23362 0.2328 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55375e-06 ( -2.98542e-07 2.97524e-07 ) ergs/cm2
Band function
Time interval is from -6.480 sec. to 9.184 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.22114 ( 1.06642 6.05697 )
beta : -4.10459 ( 4.07309 14.0731 )
Epeak [keV] : 111.235 ( -111.235 -111.235 )
Norm@50keV : 2.67816E-02 ( -0.0104586 0.00736032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.66 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 55 degrees of freedom
# Null hypothesis probability = 3.100340e-01
Photon flux (15-150 keV) in 15.66 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] : 15.0992 (-1.70414 1.92619)
R^2/D10^2 : 0.249030 (-0.0867734 0.132317)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.49 using 59 PHA bins.
# Reduced chi-squared = 1.447 for 57 degrees of freedom
# Null hypothesis probability = 1.525196e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.859e-07 3.339e-08
25- 50 7.433e-07 1.104e-07
50-150 1.157e-06 2.148e-07
15-150 2.086e-06 2.740e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 196.313 (-75.6836 -195.397)
Norm : 9.23539 (-0.900323 1.03883)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.70 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 57 degrees of freedom
# Null hypothesis probability = 3.777331e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.609e-07 1.546e-07
25- 50 6.929e-07 3.563e-07
50-150 1.512e-06 8.041e-07
15-150 2.566e-06 1.268e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.31028 (-1.88468 2.61693)
R1^2/D10^2 : 5.85781 (-4.41884 34.6569)
kT2 [keV] : 20.8021 (-3.72909 7.46405)
R2^2/D10^2 : 6.77263E-02 (-0.0471168 0.0777297)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.12 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 55 degrees of freedom
# Null hypothesis probability = 2.955566e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.692e-07 1.825e-07
25- 50 6.580e-07 2.347e-07
50-150 1.445e-06 5.155e-07
15-150 2.472e-06 7.882e-07
Peak spectrum fit
Power-law model
Time interval is from -0.140 sec. to 0.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10763 ( -0.413343 0.443652 )
Norm@50keV : 3.55488E-02 ( -0.00743727 0.00739138 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.48 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 57 degrees of freedom
# Null hypothesis probability = 3.187762e-01
Photon flux (15-150 keV) in 1 sec: 4.12649 ( -0.89479 0.900781 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.70809e-07 ( -8.60983e-08 8.56332e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.140 sec. to 0.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12407 ( -0.437633 0.429408 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.55975E-02 ( -0.0073899 0.0583281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.50 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 56 degrees of freedom
# Null hypothesis probability = 2.856488e-01
Photon flux (15-150 keV) in 1 sec: 4.14608 ( -0.91781 0.88183 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65019e-07 ( -7.9728e-08 9.2124e-08 ) ergs/cm2
Band function
Time interval is from -0.140 sec. to 0.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.939008 ( 0.938964 0.938964 )
beta : -1.10759 ( -0.443327 0.413904 )
Epeak [keV] : 43.4708 ( -43.6347 -43.6347 )
Norm@50keV : 5.87437E-02 ( -0.0305081 5.77797 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.48 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Null hypothesis probability = 2.552384e-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] : 28.4098 (-6.11775 8.69521)
R^2/D10^2 : 6.91800E-02 (-0.0377671 0.0720929)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.50 using 59 PHA bins.
# Reduced chi-squared = 1.149 for 57 degrees of freedom
# Null hypothesis probability = 2.056867e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.027e-09 3.715e-09
25- 50 5.441e-08 1.979e-08
50-150 3.162e-07 1.401e-07
15-150 3.797e-07 1.331e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 16.9863 (-3.64437 3.64404)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.04 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 57 degrees of freedom
# Null hypothesis probability = 1.927685e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.230e-08 2.494e-08
25- 50 8.136e-08 4.821e-08
50-150 1.785e-07 1.050e-07
15-150 3.021e-07 1.760e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.62286 (-1.31477 1.58271)
R1^2/D10^2 : 86.8866 (-73.8625 872.441)
kT2 [keV] : 32.7325 (-7.53821 12.976)
R2^2/D10^2 : 4.23779E-02 (-0.0261523 0.049638)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.23 using 59 PHA bins.
# Reduced chi-squared = 0.9315 for 55 degrees of freedom
# Null hypothesis probability = 6.193136e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.461e-08 3.246e-08
25- 50 5.582e-08 2.466e-08
50-150 3.123e-07 1.469e-07
15-150 4.227e-07 1.902e-07
Plot creation:
Thu Jun 6 17:23:18 EDT 2013