batgrbproduct Analysis for Trigger=582773
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): Fri Jan 3 12:19:56 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger582773/GCN5_download_cron
======================================================================
Trigger: 00582773 Segment: 000
BAT Trigger Time: 410401854.784 [s; MET]
Trigger Stop: 410401855.808 [s; MET]
UTC: 2014-01-03T00:30:43.312640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 232.130810843826 Dec: 37.7494585196999 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.09
Image Trigger?: NO
Rate S/N Ratio: 9.89949493661167 [ if not an image trigger ]
Image S/N Ratio: 9.09
Flight Position: [ source = BAT ]
RA: 232.130810843826 Dec: 37.7494585196999 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 232.113524289167 Dec: 37.7523421291922 [deg; J2000]
{ 15h 28m 27.2s , +37d 45' 08.4" }
+/- 1.73738955212753 [arcmin] (estimated 90% radius based on SNR)
+/- 0.690054903418318 [arcmin] (formal 1-sigma fit error)
SNR: 13.8168195721652
Angular difference between Flight and Ground position is 0.838140 arcmin
Partial Coding Fraction: 0.484375 [ including projection effects ]
Duration
T90: 17.2800000309944 +/- 1.95068810622523
Measured from: -11.5599998831749
to: 5.72000014781952 [s; relative to TRIGTIME]
T50: 4.60800004005432 +/- 1.69086009519157
Measured from: -1.76799988746643
to: 2.84000015258789 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.388000011444092
to: 1.38800001144409 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.5199999809265
to: 6.93600004911423 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.543244 0.487626 0.117186 -0.004506
0.041866 0.041693 0.035183 0.031122 [error]
Peak 0.100447 0.081578 0.023099 -0.007164
0.010715 0.010308 0.008382 0.007033 [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 2.10e-07 2.01e-07 1.33e-07 1.38e-07 6.00e-07 6.82e-07 erg/cm2
Error 2.62e-08 2.22e-08 2.95e-08 5.67e-08 7.05e-08 1.01e-07 erg/cm2
Peak flux Power-law 1.17e+00 6.34e-01 2.14e-01 9.36e-02 2.07e+00 2.11e+00 ph/cm2/s
Error 2.02e-01 9.47e-02 6.20e-02 4.87e-02 2.83e-01 2.90e-01 ph/cm2/s
Fluence Cutoff-PL 2.00e-07 2.24e-07 1.08e-07 1.98e-08 5.48e-07 5.51e-07 erg/cm2
Error 2.87e-08 2.99e-08 4.02e-08 4.70e-08 7.51e-08 8.96e-08 erg/cm2
Peak flux Cutoff-PL 1.12e+00 7.02e-01 1.95e-01 2.62e-02 2.04e+00 2.04e+00 ph/cm2/s
Error 2.19e-01 1.25e-01 7.60e-02 5.54e-02 2.85e-01 2.88e-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 1.12e+00 7.02e-01 1.95e-01 2.04e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 2.14e-01 1.23e-01 7.46e-02 2.87e-01 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 2.590 0.216 - - 3.01e-03 4.89e-04 74.850 57
CPL 1.430 0.918 17.4 0.0 1.63e-02 0.00e+00 70.490 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.567 0.289 - - 1.01e-02 2.25e-03 58.250 57
CPL 1.647 0.856 14.2 0.0 3.80e-02 0.00e+00 56.020 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 19.456 -12.520 6.936
T90 17.280 -11.560 5.720
T50 4.608 -1.768 2.840
Peak 1.000 0.388 1.388
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
232.1135 +37.7523 0.0139 40.9 -179.5 1.1962 13.8 TRIG_00582773
------------------------------------------
Foreground time interval of the image:
-12.520 6.936 (delta_t = 19.456 [sec])
Background time interval of the image:
-239.784 -226.934 (delta_t = 12.850 [sec])
-225.784 -12.520 (delta_t = 213.264 [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 -12.520 sec. to 6.936 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.58991 ( -0.206729 0.224564 )
Norm@50keV : 3.00588E-03 ( -0.000490525 0.000487184 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.85 using 59 PHA bins.
# Reduced chi-squared = 1.313 for 57 degrees of freedom
# Null hypothesis probability = 5.650482e-02
Photon flux (15-150 keV) in 19.46 sec: 0.624580 ( -0.0616055 0.0616159 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.00226e-07 ( -6.96487e-08 7.13845e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.520 sec. to 6.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42979 ( -1.274 0.561866 )
Epeak [keV] : 17.4238 ( )
Norm@50keV : 1.63292E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.49 using 59 PHA bins.
# Reduced chi-squared = 1.259 for 56 degrees of freedom
# Null hypothesis probability = 9.211536e-02
Photon flux (15-150 keV) in 19.46 sec: 0.604126 ( -0.063313 0.063552 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.47811e-07 ( -7.10718e-08 7.91321e-08 ) ergs/cm2
Band function
Time interval is from -12.520 sec. to 6.936 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.42954 ( -0.625811 1.56325 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 17.4234 ( -9.28451 10.2213 )
Norm@50keV : 1.63334E-02 ( -0.0101631 0.0946009 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.49 using 59 PHA bins.
# Reduced chi-squared = 1.282 for 55 degrees of freedom
# Null hypothesis probability = 7.788542e-02
Photon flux (15-150 keV) in 19.46 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] : 7.21239 (-0.774297 0.852596)
R^2/D10^2 : 1.01884 (-0.383794 0.636001)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.10 using 59 PHA bins.
# Reduced chi-squared = 1.440 for 57 degrees of freedom
# Null hypothesis probability = 1.640612e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.707e-07 2.734e-08
25- 50 2.476e-07 3.668e-08
50-150 4.566e-08 1.700e-08
15-150 4.640e-07 5.906e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.6282 (-6.04003 8.03893)
Norm : 5.04527 (-1.00928 1.3392)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.51 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 57 degrees of freedom
# Null hypothesis probability = 1.078078e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.985e-07 2.636e-08
25- 50 2.253e-07 2.740e-08
50-150 1.214e-07 4.277e-08
15-150 5.452e-07 7.113e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.96690 (-1.60767 1.93563)
R1^2/D10^2 : 8.02710 (-6.13579 98.8751)
kT2 [keV] : 10.5866 (-2.48519 7.03614)
R2^2/D10^2 : 0.143989 (-0.133068 0.392776)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.64 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 55 degrees of freedom
# Null hypothesis probability = 7.609721e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.015e-07 1.064e-07
25- 50 2.230e-07 1.151e-07
50-150 1.080e-07 6.262e-08
15-150 5.325e-07 2.736e-07
Peak spectrum fit
Power-law model
Time interval is from 0.388 sec. to 1.388 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56732 ( -0.271779 0.305846 )
Norm@50keV : 1.01161E-02 ( -0.00226453 0.00223532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.25 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.292406e-01
Photon flux (15-150 keV) in 1 sec: 2.07213 ( -0.283431 0.283442 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.031e-07 ( -1.66857e-08 1.71956e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.388 sec. to 1.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64695 ( -1.36467 0.347188 )
Epeak [keV] : 14.1566 ( )
Norm@50keV : 3.80195E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 56 degrees of freedom
# Null hypothesis probability = 4.742105e-01
Photon flux (15-150 keV) in 1 sec: 2.03536 ( -0.28447 0.28513 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.70554e-08 ( -1.65465e-08 1.80006e-08 ) ergs/cm2
Band function
Time interval is from 0.388 sec. to 1.388 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.65824 ( -2.30832 1.59123 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 13.9323 ( -10.2611 15.8873 )
Norm@50keV : 3.72854E-02 ( -0.0193317 0.252572 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.364449e-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] : 7.11143 (-1.19013 1.4182)
R^2/D10^2 : 3.60976 (-1.91196 4.26157)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.52 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.818847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.980e-08 7.650e-09
25- 50 4.207e-08 9.570e-09
50-150 7.380e-09 3.455e-09
15-150 7.926e-08 1.724e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.3473 (-8.51937 12.3978)
Norm : 16.1094 (-4.10359 6.00892)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.20 using 59 PHA bins.
# Reduced chi-squared = 0.9859 for 57 degrees of freedom
# Null hypothesis probability = 5.051670e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.351e-08 5.565e-09
25- 50 3.921e-08 7.825e-09
50-150 2.273e-08 9.830e-09
15-150 9.545e-08 2.001e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.23715 (-1.26354 1.44307)
R1^2/D10^2 : 23.7414 (-16.6531 97.5932)
kT2 [keV] : 12.9415 (-3.52018 6.09618)
R2^2/D10^2 : 0.199352 (-0.166256 0.320202)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.44 using 59 PHA bins.
# Reduced chi-squared = 0.9897 for 55 degrees of freedom
# Null hypothesis probability = 4.961186e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.543e-08 1.910e-08
25- 50 3.630e-08 1.927e-08
50-150 2.584e-08 1.613e-08
15-150 9.756e-08 5.135e-08
Plot creation:
Fri Jan 3 12:50:53 EST 2014