batgrbproduct Analysis for Trigger=576238
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 Oct 31 08:08:28 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger576238/GCN5_download_cron
======================================================================
Trigger: 00576238 Segment: 000
BAT Trigger Time: 404859390.016 [s; MET]
Trigger Stop: 404859391.04 [s; MET]
UTC: 2013-10-30T20:56:18.801700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 345.079654263905 Dec: -5.38921581867925 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 21.38
Image Trigger?: NO
Rate S/N Ratio: 126.435754436789 [ if not an image trigger ]
Image S/N Ratio: 21.38
Flight Position: [ source = BAT ]
RA: 345.079654263905 Dec: -5.38921581867925 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 345.074104459123 Dec: -5.37956561646378 [deg; J2000]
{ 23h 00m 17.8s , -05d 22' 46.4" }
+/- 0.549571165583613 [arcmin] (estimated 90% radius based on SNR)
+/- 0.187355500355173 [arcmin] (formal 1-sigma fit error)
SNR: 71.5340400636559
Angular difference between Flight and Ground position is 0.667203 arcmin
Partial Coding Fraction: 0.375 [ including projection effects ]
Duration
T90: 41.0759999155998 +/- 4.04266247219712
Measured from: -2.30799984931946
to: 38.7680000662804 [s; relative to TRIGTIME]
T50: 8.47199994325638 +/- 0.235592881087373
Measured from: 3.92800015211105
to: 12.4000000953674 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.40000003576279
to: 7.40000003576279 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.04399996995926
to: 143.368000030518 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.443045 14.679831 13.644047 3.919305
0.103561 0.119133 0.117588 0.104161 [error]
Peak 0.544944 1.157708 1.307536 0.438479
0.019177 0.026264 0.028292 0.020479 [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 3.14e-06 6.52e-06 1.06e-05 3.86e-05 2.93e-05 5.88e-05 erg/cm2
Error 1.04e-07 1.26e-07 1.57e-07 1.39e-06 4.10e-07 1.41e-06 erg/cm2
Peak flux Power-law 6.00e+00 6.26e+00 8.34e+00 8.58e+00 1.61e+01 2.81e+01 ph/cm2/s
Error 2.80e-01 2.33e-01 9.54e-01 7.48e-01 1.10e+00 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 3.00e-06 6.53e-06 1.07e-05 3.33e-05 2.91e-05 5.36e-05 erg/cm2
Error 1.47e-07 1.28e-07 2.03e-07 3.58e-06 4.31e-07 3.66e-06 erg/cm2
Peak flux Cutoff-PL 5.38e+00 8.45e+00 9.00e+00 1.15e+01 2.76e+01 3.44e+01 ph/cm2/s
Error 4.31e-01 2.95e-01 3.09e-01 1.85e+00 7.70e-01 2.00e+00 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 1.301 0.027 - - 1.98e-02 2.92e-04 36.250 57
CPL 1.167 0.112 389.3 378.8 2.24e-02 2.24e-03 31.930 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.960 0.045 - - 2.44e-01 6.41e-03 82.720 57
CPL 0.587 0.187 229.5 105.6 3.51e-01 6.25e-02 70.150 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: 23.616000 sec.
T50 in the 50-300 keV band: 7.360000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 149.412 -6.044 143.368
T90 41.076 -2.308 38.768
T50 8.472 3.928 12.400
Peak 1.000 6.400 7.400
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
345.0741 -5.3796 0.0027 32.6 132.5 30.6067 71.5 TRIG_00576238
------------------------------------------
Foreground time interval of the image:
-6.044 11.485 (delta_t = 17.529 [sec])
Background time interval of the image:
-185.015 -6.044 (delta_t = 178.971 [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 -6.044 sec. to 143.368 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30132 ( -0.0270108 0.0269365 )
Norm@50keV : 1.98189E-02 ( -0.000291798 0.000291371 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.25 using 59 PHA bins.
# Reduced chi-squared = 0.6360 for 57 degrees of freedom
# Null hypothesis probability = 9.854542e-01
Photon flux (15-150 keV) in 149.4 sec: 2.36502 ( -0.0401614 0.0402972 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.92501e-05 ( -4.09703e-07 4.09744e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.044 sec. to 143.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16661 ( -0.1129 0.1103 )
Epeak [keV] : 389.304 ( -147.035 610.493 )
Norm@50keV : 2.24188E-02 ( -0.00210331 0.00238017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.93 using 59 PHA bins.
# Reduced chi-squared = 0.5702 for 56 degrees of freedom
# Null hypothesis probability = 9.960114e-01
Photon flux (15-150 keV) in 149.4 sec: 2.33681 ( -0.04551 0.04581 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.91046e-05 ( -4.31168e-07 4.30272e-07 ) ergs/cm2
Band function
Time interval is from -6.044 sec. to 143.368 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16661 ( -0.296884 3.5313 )
beta : -9.99648 ( 9.99215 19.9921 )
Epeak [keV] : 389.300 ( -118.733 1260.81 )
Norm@50keV : 2.24161E-02 ( -0.000447984 0.00237872 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.93 using 59 PHA bins.
# Reduced chi-squared = 0.5805 for 55 degrees of freedom
# Null hypothesis probability = 9.945962e-01
Photon flux (15-150 keV) in 149.4 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] : 21.3689 ( )
R^2/D10^2 : 8.23148E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 911.76 using 59 PHA bins.
# Reduced chi-squared = 15.996 for 57 degrees of freedom
# Null hypothesis probability = 2.518670e-154
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.053e-06 3.324e-08
25- 50 5.471e-06 1.262e-07
50-150 1.864e-05 3.959e-07
15-150 2.517e-05 3.810e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 10.3490 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 407.91 using 59 PHA bins.
# Reduced chi-squared = 7.1564 for 57 degrees of freedom
# Null hypothesis probability = 1.733419e-54
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.850e-06 6.872e-08
25- 50 7.406e-06 1.315e-07
50-150 1.624e-05 2.689e-07
15-150 2.750e-05 4.557e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.48488 (-0.537406 0.56662)
R1^2/D10^2 : 1.07132 (-0.205144 0.267504)
kT2 [keV] : 33.1404 (-1.73437 2.06081)
R2^2/D10^2 : 1.60663E-02 (-0.0029924 0.00329994)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.20 using 59 PHA bins.
# Reduced chi-squared = 0.8582 for 55 degrees of freedom
# Null hypothesis probability = 7.634293e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.556e-06 1.382e-07
25- 50 6.677e-06 1.972e-07
50-150 1.973e-05 4.930e-07
15-150 2.896e-05 6.125e-07
Peak spectrum fit
Power-law model
Time interval is from 6.400 sec. to 7.400 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.960232 ( -0.0450794 0.0448385 )
Norm@50keV : 0.244104 ( -0.00641282 0.00640363 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.72 using 59 PHA bins.
# Reduced chi-squared = 1.451 for 57 degrees of freedom
# Null hypothesis probability = 1.462685e-02
Photon flux (15-150 keV) in 1 sec: 28.0547 ( -0.747995 0.748396 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67781e-06 ( -7.35734e-08 7.36243e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.400 sec. to 7.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.587121 ( -0.190597 0.183052 )
Epeak [keV] : 229.510 ( -56.9425 154.205 )
Norm@50keV : 0.350933 ( -0.0559179 0.0690838 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.15 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 56 degrees of freedom
# Null hypothesis probability = 9.673392e-02
Photon flux (15-150 keV) in 1 sec: 27.6485 ( -0.7694 0.7703 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65048e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 6.400 sec. to 7.400 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.885780 ( 0.88578 0.88578 )
beta : -0.960231 ( -0.0448378 0.0450811 )
Epeak [keV] : 13.1199 ( )
Norm@50keV : 0.370462 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.72 using 59 PHA bins.
# Reduced chi-squared = 1.504 for 55 degrees of freedom
# Null hypothesis probability = 9.195890e-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] : 23.4618 ( )
R^2/D10^2 : 0.841822 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 266.84 using 59 PHA bins.
# Reduced chi-squared = 4.6814 for 57 degrees of freedom
# Null hypothesis probability = 6.924045e-29
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.316e-08 4.580e-09
25- 50 4.562e-07 1.940e-08
50-150 1.874e-06 7.100e-08
15-150 2.413e-06 7.050e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 114.661 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 546.61 using 59 PHA bins.
# Reduced chi-squared = 9.5896 for 57 degrees of freedom
# Null hypothesis probability = 3.990176e-81
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.855e-07 7.850e-09
25- 50 5.492e-07 1.585e-08
50-150 1.205e-06 3.150e-08
15-150 2.039e-06 5.500e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.71263 (-1.12881 1.23889)
R1^2/D10^2 : 6.52401 (-1.78896 2.72776)
kT2 [keV] : 37.3624 (-3.70314 5.25522)
R2^2/D10^2 : 0.168503 (-0.0569693 0.0681132)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 55 degrees of freedom
# Null hypothesis probability = 1.742664e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.559e-07 1.595e-08
25- 50 5.085e-07 3.495e-08
50-150 2.006e-06 1.845e-07
15-150 2.671e-06 2.225e-07
Plot creation:
Thu Oct 31 08:35:03 EDT 2013