batgrbproduct Analysis for Trigger=557466
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 10:20:17 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557466/GCN5_download_cron
======================================================================
Trigger: 00557466 Segment: 000
BAT Trigger Time: 392114864 [s; MET]
Trigger Stop: 392114928 [s; MET]
UTC: 2013-06-05T08:47:33.362000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 53.4054420440404 Dec: -31.3548793797072 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.09
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.09
Flight Position: [ source = BAT ]
RA: 53.4054420440404 Dec: -31.3548793797072 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 53.4017539868844 Dec: -31.2871685856624 [deg; J2000]
{ 03h 33m 36.4s , -31d 17' 13.8" }
+/- 3.37484764477232 [arcmin] (estimated 90% radius based on SNR)
+/- 2.00882753595597 [arcmin] (formal 1-sigma fit error)
SNR: 5.35142648011839
Angular difference between Flight and Ground position is 4.067043 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.189501 0.154500 0.065206 0.061078
0.048414 0.046556 0.040927 0.035555 [error]
Peak 0.189501 0.154500 0.065206 0.061078
0.048414 0.046556 0.040927 0.035555 [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 4.48e-08 6.42e-08 6.83e-08 1.35e-07 2.19e-07 3.12e-07 erg/cm2
Error 1.89e-08 2.02e-08 3.57e-08 1.66e-07 8.42e-08 1.86e-07 erg/cm2
Peak flux Power-law 2.28e-02 1.80e-02 9.57e-03 7.41e-03 5.37e-02 5.77e-02 ph/cm2/s
Error 9.82e-03 5.61e-03 4.84e-03 8.53e-03 1.67e-02 1.84e-02 ph/cm2/s
Fluence Cutoff-PL 4.02e-08 7.87e-08 5.18e-08 7.49e-09 1.77e-07 1.78e-07 erg/cm2
Error 2.14e-08 3.02e-08 4.58e-08 1.20e-07 8.72e-08 1.78e-07 erg/cm2
Peak flux Cutoff-PL 2.00e-02 2.20e-02 7.75e-03 6.14e-04 5.03e-02 5.03e-02 ph/cm2/s
Error 1.11e-02 8.36e-03 6.32e-03 6.96e-03 1.68e-02 1.88e-02 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 1.911 0.585 - - 3.73e-04 1.46e-04 58.300 57
CPL 0.131 3.581 39.6 0.0 4.56e-03 0.00e+00 57.140 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.911 0.585 - - 3.73e-04 1.46e-04 58.300 57
CPL 0.131 3.581 39.6 0.0 4.56e-03 0.00e+00 57.140 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: 0.896000 sec.
T50 in the 50-300 keV band: 0.512000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
53.4018 -31.2872 0.0360 9.7 80.5 0.4959 5.4 TRIG_00557466
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91064 ( -0.544956 0.624636 )
Norm@50keV : 3.72509E-04 ( -0.000148608 0.00014266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.30 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.274269e-01
Photon flux (15-150 keV) in 64 sec: 5.37020E-02 ( -0.0166952 0.0166954 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19227e-07 ( -8.08115e-08 8.76493e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.130760 ( -5.02996 2.13261 )
Epeak [keV] : 39.6215 ( )
Norm@50keV : 4.55725E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 56 degrees of freedom
# Null hypothesis probability = 4.324715e-01
Photon flux (15-150 keV) in 64 sec: 5.02672E-02 ( -0.0163483 0.0172785 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77432e-07 ( -6.71898e-08 1.07234e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.33099 ( -2.78681 0.768236 )
Epeak [keV] : 26.4410 ( -26.4403 10.5326 )
Norm@50keV : 42.9618 ( -12.9872 570545 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.71 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Null hypothesis probability = 4.108920e-01
Photon flux (15-150 keV) in 64 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] : 9.72169 (-2.78223 3.88426)
R^2/D10^2 : 2.91025E-02 (-0.0291026 0.0760054)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.54 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.550112e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.549e-08 2.148e-08
25- 50 8.473e-08 5.251e-08
50-150 4.073e-08 3.072e-08
15-150 1.609e-07 9.722e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.5942 (-38.5219 -66.5931)
Norm : 0.272031 (-0.106697 0.190155)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.60 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.527036e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.441e-08 2.782e-08
25- 50 6.970e-08 4.154e-08
50-150 8.620e-08 7.619e-08
15-150 2.003e-07 1.368e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.05 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.97 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.95 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.93 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 55 degrees of freedom
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 3.988297e-01
# Null hypothesis probability = 4.016276e-01
# Null hypothesis probability = 4.022137e-01
# Null hypothesis probability = 4.030161e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.130e-08 2.688e-08
25- 50 7.772e-08 4.842e-08
50-150 5.610e-08 3.619e-08
15-150 1.751e-07 1.114e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91064 ( -0.544956 0.624636 )
Norm@50keV : 3.72509E-04 ( -0.000148608 0.00014266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.30 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.274269e-01
Photon flux (15-150 keV) in 64 sec: 5.37020E-02 ( -0.0166952 0.0166954 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.19227e-07 ( -8.08115e-08 8.76493e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.130760 ( -5.02996 2.13263 )
Epeak [keV] : 39.6215 ( )
Norm@50keV : 4.55725E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 56 degrees of freedom
# Null hypothesis probability = 4.324715e-01
Photon flux (15-150 keV) in 64 sec: 5.02672E-02 ( -0.0163483 0.0172785 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.77432e-07 ( -6.71898e-08 1.07234e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.33099 ( -2.78681 0.768236 )
Epeak [keV] : 26.4410 ( -26.4403 10.5326 )
Norm@50keV : 42.9618 ( -12.9872 570545 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.71 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Null hypothesis probability = 4.108920e-01
Photon flux (15-150 keV) in 64 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] : 9.72169 (-2.78223 3.88426)
R^2/D10^2 : 2.91025E-02 (-0.0291026 0.0760054)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.54 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 57 degrees of freedom
# Null hypothesis probability = 4.550112e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.549e-08 2.188e-08
25- 50 8.473e-08 5.011e-08
50-150 4.073e-08 2.898e-08
15-150 1.609e-07 1.025e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 66.5942 (-38.5219 -66.5931)
Norm : 0.272031 (-0.106697 0.190155)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.60 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.527036e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.441e-08 2.723e-08
25- 50 6.970e-08 4.192e-08
50-150 8.620e-08 7.411e-08
15-150 2.003e-07 1.369e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.05 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.97 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.95 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.93 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 55 degrees of freedom
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Reduced chi-squared = 1.036 for 55 degrees of freedom
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 3.988297e-01
# Null hypothesis probability = 4.016276e-01
# Null hypothesis probability = 4.022137e-01
# Null hypothesis probability = 4.030161e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.130e-08 2.840e-08
25- 50 7.772e-08 4.528e-08
50-150 5.610e-08 3.235e-08
15-150 1.751e-07 1.134e-07
Plot creation:
Thu Jun 6 10:43:40 EDT 2013