batgrbproduct Analysis for Trigger=592204
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 Mar 18 15:10:26 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger592204/GCN5_download_cron
======================================================================
Trigger: 00592204 Segment: 000
BAT Trigger Time: 416794159.744 [s; MET]
Trigger Stop: 416794171.904 [s; MET]
UTC: 2014-03-18T00:09:07.971300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 184.052783456915 Dec: 20.2074317487921 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.5
Image Trigger?: NO
Rate S/N Ratio: 12.2474487139159 [ if not an image trigger ]
Image S/N Ratio: 8.5
Flight Position: [ source = BAT ]
RA: 184.052783456915 Dec: 20.2074317487921 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 184.049611703625 Dec: 20.2251246758754 [deg; J2000]
{ 12h 16m 11.9s , +20d 13' 30.4" }
+/- 2.11508144051494 [arcmin] (estimated 90% radius based on SNR)
+/- 0.675909958035785 [arcmin] (formal 1-sigma fit error)
SNR: 10.4319473854821
Angular difference between Flight and Ground position is 1.076492 arcmin
Partial Coding Fraction: 0.4921875 [ including projection effects ]
Duration
T90: 8.45999991893768 +/- 1.29602777450876
Measured from: 2.70000010728836
to: 11.160000026226 [s; relative to TRIGTIME]
T50: 4.77599996328354 +/- 1.69680169079992
Measured from: 4.3160001039505
to: 9.09200006723404 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.47999995946884
to: 6.47999995946884 [s; relative to TRIGTIME]
Total Fluence
Measured from: 2.24399995803833
to: 11.6759999990463 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.095226 0.164639 0.126817 0.059626
0.023451 0.022975 0.020259 0.017440 [error]
Peak 0.007267 0.037363 0.016473 0.012088
0.007717 0.007377 0.006550 0.005665 [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 3.23e-08 6.51e-08 1.02e-07 3.55e-07 2.85e-07 5.55e-07 erg/cm2
Error 9.26e-09 1.12e-08 1.99e-08 1.55e-07 4.93e-08 1.68e-07 erg/cm2
Peak flux Power-law 1.19e-01 1.60e-01 1.59e-01 2.83e-01 5.30e-01 7.21e-01 ph/cm2/s
Error 7.94e-02 6.65e-02 5.10e-02 2.06e-01 1.75e-01 2.33e-01 ph/cm2/s
Fluence Cutoff-PL 3.08e-08 6.69e-08 1.05e-07 2.40e-07 2.80e-07 4.42e-07 erg/cm2
Error 1.07e-08 1.31e-08 2.17e-08 2.53e-07 5.42e-08 2.38e-07 erg/cm2
Peak flux Cutoff-PL 1.11e-01 1.66e-01 1.65e-01 1.87e-01 5.24e-01 6.24e-01 ph/cm2/s
Error 8.32e-02 7.60e-02 5.92e-02 2.07e-01 1.76e-01 2.84e-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 1.348 0.278 - - 3.09e-03 4.83e-04 55.010 57
CPL 1.092 1.406 182.3 0.0 4.14e-03 6.84e-03 54.830 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.014 0.568 - - 4.60e-03 1.49e-03 87.490 57
CPL 0.641 1.028 192.2 0.0 6.99e-03 8.65e-02 87.380 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: 16.256000 sec.
T50 in the 50-300 keV band: 7.680000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 9.432 2.244 11.676
T90 8.460 2.700 11.160
T50 4.776 4.316 9.092
Peak 1.000 5.480 6.480
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
184.0496 +20.2251 0.0185 28.5 125.6 0.4456 10.4 TRIG_00592204
------------------------------------------
Foreground time interval of the image:
2.244 11.676 (delta_t = 9.432 [sec])
Background time interval of the image:
-239.744 -56.828 (delta_t = 182.916 [sec])
-55.744 2.244 (delta_t = 57.988 [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 2.244 sec. to 11.676 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34794 ( -0.279969 0.276327 )
Norm@50keV : 3.08945E-03 ( -0.000483186 0.000482497 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 0.9650 for 57 degrees of freedom
# Null hypothesis probability = 5.502189e-01
Photon flux (15-150 keV) in 9.432 sec: 0.372031 ( -0.0598307 0.0600597 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.84735e-07 ( -4.89554e-08 4.96188e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.244 sec. to 11.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09192 ( -1.2394 1.57198 )
Epeak [keV] : 182.312 ( -182.342 -182.342 )
Norm@50keV : 4.13557E-03 ( -0.00149838 0.0121718 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9791 for 56 degrees of freedom
# Null hypothesis probability = 5.191877e-01
Photon flux (15-150 keV) in 9.432 sec: 0.367591 ( -0.062572 0.062454 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79691e-07 ( -5.49593e-08 5.34757e-08 ) ergs/cm2
Band function
Time interval is from 2.244 sec. to 11.676 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.79720 ( -4.7972 -4.7972 )
beta : -1.52336 ( -0.396286 0.350475 )
Epeak [keV] : 30.9406 ( -30.9406 9.19355 )
Norm@50keV : 59.4099 ( -9.21566 1.37776e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9875 for 55 degrees of freedom
# Null hypothesis probability = 5.008067e-01
Photon flux (15-150 keV) in 9.432 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] : 16.6364 (-3.31864 4.32901)
R^2/D10^2 : 2.99864E-02 (-0.0163024 0.0346574)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.53 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 57 degrees of freedom
# Null hypothesis probability = 2.572704e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.603e-08 5.489e-09
25- 50 6.971e-08 1.958e-08
50-150 1.368e-07 4.811e-08
15-150 2.225e-07 6.187e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.54370 (-0.241704 0.241682)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.31 using 59 PHA bins.
# Reduced chi-squared = 0.9880 for 57 degrees of freedom
# Null hypothesis probability = 5.008100e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.626e-08 2.103e-08
25- 50 6.975e-08 3.887e-08
50-150 1.530e-07 8.626e-08
15-150 2.590e-07 1.465e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.00604 (-3.03903 4.8534)
R1^2/D10^2 : 0.236555 (-0.176462 0.334371)
kT2 [keV] : 31.5456 (-12.0351 -31.7293)
R2^2/D10^2 : 2.72961E-03 (-0.00267837 0.0118621)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.05 using 59 PHA bins.
# Reduced chi-squared = 0.9827 for 55 degrees of freedom
# Null hypothesis probability = 5.110255e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.976e-08 1.727e-08
25- 50 6.979e-08 3.795e-08
50-150 1.802e-07 1.030e-07
15-150 2.797e-07 1.428e-07
Peak spectrum fit
Power-law model
Time interval is from 5.480 sec. to 6.480 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01434 ( -0.614577 0.521586 )
Norm@50keV : 4.59765E-03 ( -0.00151099 0.001464 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.49 using 59 PHA bins.
# Reduced chi-squared = 1.535 for 57 degrees of freedom
# Null hypothesis probability = 5.815523e-03
Photon flux (15-150 keV) in 1 sec: 0.530112 ( -0.173867 0.176563 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.95599e-08 ( -1.58706e-08 1.58842e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.480 sec. to 6.480 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.641064 ( -2.71178 -0.656068 )
Epeak [keV] : 192.153 ( -197.795 -197.795 )
Norm@50keV : 6.99193E-03 ( -0.00369541 0.169319 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.38 using 59 PHA bins.
# Reduced chi-squared = 1.560 for 56 degrees of freedom
# Null hypothesis probability = 4.619220e-03
Photon flux (15-150 keV) in 1 sec: 0.523752 ( -0.173547 0.178968 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.82144e-08 ( -1.82638e-08 1.69385e-08 ) ergs/cm2
Band function
Time interval is from 5.480 sec. to 6.480 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95774 ( -4.95774 -4.95774 )
beta : -1.49233 ( -1.23434 0.78362 )
Epeak [keV] : 37.8852 ( -37.8852 41.1062 )
Norm@50keV : 33.4735 ( -9.85039 864418 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.95 using 59 PHA bins.
# Reduced chi-squared = 1.544 for 55 degrees of freedom
# Null hypothesis probability = 5.892419e-03
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] : 19.2094 (-7.59672 17.3735)
R^2/D10^2 : 2.85674E-02 (-0.0280872 0.12678)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.46 using 59 PHA bins.
# Reduced chi-squared = 1.569 for 57 degrees of freedom
# Null hypothesis probability = 3.892597e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.064e-09 1.343e-09
25- 50 1.000e-08 6.020e-09
50-150 2.718e-08 1.818e-08
15-150 3.925e-08 2.574e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-100.49 -199.363)
Norm : 2.26060 (-0.72819 0.728231)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.07 using 59 PHA bins.
# Reduced chi-squared = 1.580 for 57 degrees of freedom
# Null hypothesis probability = 3.423393e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.629e-09 3.517e-09
25- 50 1.083e-08 6.840e-09
50-150 2.375e-08 1.471e-08
15-150 4.021e-08 2.495e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.46 using 59 PHA bins.
#Fit statistic : Chi-Squared = 85.22 using 59 PHA bins.
#Fit statistic : Chi-Squared = 85.20 using 59 PHA bins.
#Fit statistic : Chi-Squared = 85.16 using 59 PHA bins.
# Reduced chi-squared = 1.626 for 55 degrees of freedom
# Reduced chi-squared = 1.549 for 55 degrees of freedom
# Reduced chi-squared = 1.549 for 55 degrees of freedom
# Reduced chi-squared = 1.548 for 55 degrees of freedom
# Null hypothesis probability = 2.281805e-03
# Null hypothesis probability = 5.575054e-03
# Null hypothesis probability = 5.598558e-03
# Null hypothesis probability = 5.645989e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Tue Mar 18 15:49:07 EDT 2014