batgrbproduct Analysis for Trigger=585834
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 Feb 7 11:50:52 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger585834/batgroup_hand_proc
======================================================================
Trigger: 00585834 Segment: 000
BAT Trigger Time: 413363851.776 [s; MET]
Trigger Stop: 413363852.8 [s; MET]
UTC: 2014-02-06T07:17:20.165420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 145.350247125002 Dec: 66.7503930303182 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.35
Image Trigger?: NO
Rate S/N Ratio: 52.820450584977 [ if not an image trigger ]
Image S/N Ratio: 18.35
Flight Position: [ source = BAT ]
RA: 145.350247125002 Dec: 66.7503930303182 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 145.320577460054 Dec: 66.7618595985734 [deg; J2000]
{ 09h 41m 16.9s , +66d 45' 42.7" }
+/- 0.69333051308547 [arcmin] (estimated 90% radius based on SNR)
+/- 0.205481935230627 [arcmin] (formal 1-sigma fit error)
SNR: 51.3270735445193
Angular difference between Flight and Ground position is 0.983310 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 93.62399995327 +/- 13.7528238777123
Measured from: 1.91599994897842
to: 95.5399999022484 [s; relative to TRIGTIME]
T50: 11.0839999318123 +/- 18.1882327028035
Measured from: 51.9639999866486
to: 63.0479999184608 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 60.8039999604225
to: 61.8039999604225 [s; relative to TRIGTIME]
Total Fluence
Measured from: -37.2120000123978
to: 256.091999948025 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 7.730381 10.372310 7.511088 1.413724
0.109592 0.112886 0.101249 0.085569 [error]
Peak 0.590600 0.982632 0.863442 0.160404
0.013651 0.017062 0.016387 0.009136 [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 2.35e-06 4.12e-06 5.53e-06 1.52e-05 1.61e-05 2.72e-05 erg/cm2
Error 8.65e-08 8.73e-08 1.16e-07 7.42e-07 2.88e-07 7.91e-07 erg/cm2
Peak flux Power-law 6.08e+00 6.66e+00 5.19e+00 6.66e+00 2.04e+01 2.46e+01 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
Fluence Cutoff-PL 2.03e-06 4.20e-06 5.77e-06 8.30e-06 1.55e-05 2.03e-05 erg/cm2
Error 1.16e-07 9.36e-08 1.36e-07 1.31e-06 3.27e-07 1.34e-06 erg/cm2
Peak flux Cutoff-PL 4.65e+00 6.93e+00 5.81e+00 3.18e+00 1.94e+01 2.06e+01 ph/cm2/s
Error 3.38e-01 2.00e-01 1.77e-01 4.02e-01 5.20e-01 6.78e-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 1.575 0.034 - - 5.84e-03 1.02e-04 91.210 57
CPL 1.039 0.155 100.9 14.5 1.01e-02 1.56e-03 52.760 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.358 0.000 - - 1.69e-01 0.00e+00 159.740 57
CPL 0.367 0.193 94.5 8.2 4.65e-01 8.99e-02 66.920 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: 64.128000 sec.
T50 in the 50-300 keV band: 11.584000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 293.304 -37.212 256.092
T90 93.624 1.916 95.540
T50 11.084 51.964 63.048
Peak 1.000 60.804 61.804
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
145.3206 66.7619 0.0037 4.2255 40.2107 5.3078332 51.327 TRIG_00585834
Foreground time interval of the image:
-37.212 11.925 (delta_t = 49.137 [sec])
Background time interval of the image:
-239.776 -37.212 (delta_t = 202.564 [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 -37.212 sec. to 256.092 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57542 ( -0.0336913 0.0337006 )
Norm@50keV : 5.83712E-03 ( -0.000102497 0.000102493 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.21 using 59 PHA bins.
# Reduced chi-squared = 1.600 for 57 degrees of freedom
# Null hypothesis probability = 2.695422e-03
Photon flux (15-150 keV) in 293.3 sec: 0.744499 ( -0.0153444 0.0154021 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.60611e-05 ( -2.87682e-07 2.87772e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -37.212 sec. to 256.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03926 ( -0.157341 0.152494 )
Epeak [keV] : 100.899 ( -10.8697 18.0793 )
Norm@50keV : 1.00706E-02 ( -0.00141689 0.00170534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.76 using 59 PHA bins.
# Reduced chi-squared = 0.9421 for 56 degrees of freedom
# Null hypothesis probability = 5.983439e-01
Photon flux (15-150 keV) in 293.3 sec: 0.709846 ( -0.017527 0.017662 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55091e-05 ( -3.27528e-07 3.26824e-07 ) ergs/cm2
Band function
Time interval is from -37.212 sec. to 256.092 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01294 ( -0.177745 0.222813 )
beta : -2.12758 ( 2.12357 0.299821 )
Epeak [keV] : 97.7217 ( -18.8911 21.1132 )
Norm@50keV : 1.03876E-02 ( -0.00170349 0.00334983 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.62 using 59 PHA bins.
# Reduced chi-squared = 0.9567 for 55 degrees of freedom
# Null hypothesis probability = 5.660848e-01
Photon flux (15-150 keV) in 293.3 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] : 16.6609 ( )
R^2/D10^2 : 5.53560E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 503.31 using 59 PHA bins.
# Reduced chi-squared = 8.8300 for 57 degrees of freedom
# Null hypothesis probability = 1.049591e-72
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.228e-07 3.446e-08
25- 50 4.017e-06 9.532e-08
50-150 7.909e-06 2.112e-07
15-150 1.285e-05 2.434e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.00216 (-0.0526088 0.0525698)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.23 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 57 degrees of freedom
# Null hypothesis probability = 3.940510e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.193e-06 4.180e-08
25- 50 4.219e-06 8.799e-08
50-150 9.254e-06 1.950e-07
15-150 1.567e-05 3.314e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.00807 (-0.676328 0.707638)
R1^2/D10^2 : 0.427234 (-0.0996945 0.144423)
kT2 [keV] : 25.8763 (-1.75395 2.20868)
R2^2/D10^2 : 8.96035E-03 (-0.00246257 0.00289569)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.24 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 55 degrees of freedom
# Null hypothesis probability = 1.623897e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.754e-06 1.301e-07
25- 50 4.282e-06 1.657e-07
50-150 9.222e-06 4.165e-07
15-150 1.526e-05 5.118e-07
Peak spectrum fit
Power-law model
Time interval is from 60.804 sec. to 61.804 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35812 ( )
Norm@50keV : 0.169214 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 159.74 using 59 PHA bins.
# Reduced chi-squared = 2.8024 for 57 degrees of freedom
# Null hypothesis probability = 1.120245e-11
Photon flux (15-150 keV) in 1 sec: 20.4198 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from 60.804 sec. to 61.804 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.366990 ( -0.196517 0.189004 )
Epeak [keV] : 94.4550 ( -6.94168 9.43565 )
Norm@50keV : 0.464853 ( -0.0795842 0.100154 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.92 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 56 degrees of freedom
# Null hypothesis probability = 1.506560e-01
Photon flux (15-150 keV) in 1 sec: 19.3887 ( -0.5184 0.5212 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59079e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 60.804 sec. to 61.804 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.366893 ( -0.178509 0.197776 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 94.4373 ( -6.94341 9.43373 )
Norm@50keV : 0.464911 ( -0.0796388 0.100146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.92 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 55 degrees of freedom
# Null hypothesis probability = 1.300610e-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] : 18.2276 ( )
R^2/D10^2 : 1.27416 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 237.46 using 59 PHA bins.
# Reduced chi-squared = 4.1660 for 57 degrees of freedom
# Null hypothesis probability = 6.931532e-24
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.441e-08 3.370e-09
25- 50 3.941e-07 1.205e-08
50-150 9.533e-07 3.860e-08
15-150 1.432e-06 3.600e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 86.0542 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 203.79 using 59 PHA bins.
# Reduced chi-squared = 3.5752 for 57 degrees of freedom
# Null hypothesis probability = 2.228278e-18
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.143e-07 5.650e-09
25- 50 4.122e-07 1.050e-08
50-150 9.040e-07 2.190e-08
15-150 1.531e-06 3.550e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.53386 (-1.38536 1.44475)
R1^2/D10^2 : 7.24743 (-2.40749 4.95192)
kT2 [keV] : 25.1351 (-2.08381 2.91281)
R2^2/D10^2 : 0.335942 (-0.123509 0.145946)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.37 using 59 PHA bins.
# Reduced chi-squared = 1.334 for 55 degrees of freedom
# Null hypothesis probability = 4.956431e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.365e-07 1.370e-08
25- 50 4.038e-07 2.335e-08
50-150 1.042e-06 6.585e-08
15-150 1.582e-06 8.450e-08
Plot creation:
Fri Feb 7 12:49:09 EST 2014