batgrbproduct analysis for trigger=741567
batgrbproduct Analysis for Trigger=741567
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Mar 8 21:36:48 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger741567/GCN5_download_cron
======================================================================
Trigger: 00741567 Segment: 000
BAT Trigger Time: 510636672 [s; MET]
Trigger Stop: 510636736 [s; MET]
UTC: 2017-03-08T03:30:53.279360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 260.082337750107 Dec: -24.8718115420894 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.26
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.26
Flight Position: [ source = BAT ]
RA: 260.082337750107 Dec: -24.8718115420894 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 260.137880660915 Dec: -24.6957092810699 [deg; J2000]
{ 17h 20m 33.1s , -24d 41' 44.6" }
+/- 4.9081408488453 [arcmin] (estimated 90% radius based on SNR)
+/- 3.08971518063827 [arcmin] (formal 1-sigma fit error)
SNR: 3.1339644786959
Angular difference between Flight and Ground position is 10.990799 arcmin
Partial Coding Fraction: 0.3710938 [ including projection effects ]
Duration
T90: 48.6759999394417 +/- 27.0345416409856
Measured from: 14.8760001063347
to: 63.5520000457764 [s; relative to TRIGTIME]
T50: 48.6759999394417 +/- 29.4506071426988
Measured from: 14.8760001063347
to: 63.5520000457764 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 25.1679999828339
to: 26.1679999828339 [s; relative to TRIGTIME]
Total Fluence
Measured from: 14.8759999871254
to: 63.5519999861717 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.428750 0.375246 0.292162 0.066748
0.080546 0.078082 0.064505 0.052966 [error]
Peak 0.042261 0.033062 0.020441 -0.008369
0.011490 0.011289 0.009319 0.007925 [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 1.33e-07 1.97e-07 2.17e-07 4.50e-07 6.85e-07 9.98e-07 erg/cm2
Error 3.93e-08 3.73e-08 6.61e-08 2.88e-07 1.52e-07 3.50e-07 erg/cm2
Peak flux Power-law 4.15e-01 2.67e-01 1.11e-01 6.29e-02 8.25e-01 8.56e-01 ph/cm2/s
Error 1.88e-01 9.64e-02 7.03e-02 8.29e-02 2.86e-01 2.99e-01 ph/cm2/s
Fluence Cutoff-PL 1.33e-07 1.97e-07 2.18e-07 4.57e-07 6.86e-07 9.80e-07 erg/cm2
Error 3.93e-08 3.74e-08 6.61e-08 4.84e-07 1.52e-07 3.95e-07 erg/cm2
Peak flux Cutoff-PL 3.71e-01 3.04e-01 1.13e-01 1.93e-02 8.05e-01 8.08e-01 ph/cm2/s
Error 2.95e-01 1.29e-01 8.06e-02 4.57e-02 2.91e-01 3.04e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 3.75e-01 3.00e-01 1.16e-01 2.46e-02 8.10e-01 8.18e-01 ph/cm2/s
Error 2.95e-01 -------- -------- -------- -------- 3.00e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.860 0.368 - - 1.53e-03 3.39e-04 48.900 57
CPL 2.463 0.869 165.3 0.0 7.69e-04 0.00e+00 48.760 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.265 0.720 - - 4.81e-03 2.38e-03 66.250 57
CPL 1.152 2.519 32.5 -0.6 2.09e-02 1.86e+00 65.700 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 48.676 14.876 63.552
T90 48.676 14.876 63.552
T50 48.676 14.876 63.552
Peak 1.000 25.168 26.168
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
260.1379 -24.6957 0.0618 34.4 44.3 0.5294 3.1 TRIG_00741567
------------------------------------------
Foreground time interval of the image:
14.876 63.552 (delta_t = 48.676 [sec])
Background time interval of the image:
-82.699 14.876 (delta_t = 97.575 [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 14.876 sec. to 63.552 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85995 ( -0.35543 0.381565 )
Norm@50keV : 1.52971E-03 ( -0.000347517 0.00033131 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.90 using 59 PHA bins.
# Reduced chi-squared = 0.8579 for 57 degrees of freedom
# Null hypothesis probability = 7.686639e-01
Photon flux (15-150 keV) in 48.68 sec: 0.215892 ( -0.0414116 0.0415161 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.84631e-07 ( -1.50278e-07 1.53812e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 14.876 sec. to 63.552 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46294 ( -1.55774 0.180812 )
Epeak [keV] : 165.319 ( )
Norm@50keV : 7.69480E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.76 using 59 PHA bins.
# Reduced chi-squared = 0.8707 for 56 degrees of freedom
# Null hypothesis probability = 7.429122e-01
Photon flux (15-150 keV) in 48.68 sec: 0.216268 ( -0.041974 0.041111 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.8575e-07 ( -1.53327e-07 1.4971e-07 ) ergs/cm2
Band function
Time interval is from 14.876 sec. to 63.552 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29328 ( 1.28808 1.28808 )
beta : -1.86879 ( 1.86927 0.363549 )
Epeak [keV] : 26.5784 ( -26.6996 -26.6996 )
Norm@50keV : 4.39639E-03 ( -0.00467027 412136 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.88 using 59 PHA bins.
# Reduced chi-squared = 0.8888 for 55 degrees of freedom
# Null hypothesis probability = 7.060918e-01
Photon flux (15-150 keV) in 48.68 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] : 10.6410 (-2.84408 4.29612)
R^2/D10^2 : 7.62043E-02 (-0.0537785 0.172389)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.40 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.212346e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.712e-08 3.623e-08
25- 50 2.359e-07 8.573e-08
50-150 1.470e-07 7.625e-08
15-150 4.700e-07 1.531e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.7965 (-49.8164 -98.8028)
Norm : 0.942758 (-0.231944 0.349782)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.16 using 59 PHA bins.
# Reduced chi-squared = 0.8800 for 57 degrees of freedom
# Null hypothesis probability = 7.274885e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.199e-07 3.612e-08
25- 50 2.069e-07 8.504e-08
50-150 3.330e-07 2.272e-07
15-150 6.598e-07 2.880e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.45422 (-1.97562 2.72836)
R1^2/D10^2 : 0.785497 (-0.620942 2.27714)
kT2 [keV] : 26.2607 (-10.4292 44.8233)
R2^2/D10^2 : 2.26799E-03 (-0.00212952 0.0119216)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.34 using 59 PHA bins.
# Reduced chi-squared = 0.8790 for 55 degrees of freedom
# Null hypothesis probability = 7.250773e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.429e-07 8.470e-08
25- 50 1.795e-07 9.330e-08
50-150 3.859e-07 2.290e-07
15-150 7.083e-07 3.797e-07
Peak spectrum fit
Power-law model
Time interval is from 25.168 sec. to 26.168 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26534 ( -0.61722 0.823236 )
Norm@50keV : 4.80896E-03 ( -0.00245467 0.00230194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.25 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 57 degrees of freedom
# Null hypothesis probability = 1.881070e-01
Photon flux (15-150 keV) in 1 sec: 0.824506 ( -0.286295 0.286333 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.56745e-08 ( -1.85292e-08 1.97737e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.168 sec. to 26.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15217 ( -4.11225 0.925671 )
Epeak [keV] : 32.4581 ( -31.3111 -32.4443 )
Norm@50keV : 2.08753E-02 ( -0.0210588 3.70009 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.70 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 56 degrees of freedom
# Null hypothesis probability = 1.761105e-01
Photon flux (15-150 keV) in 1 sec: 0.804567 ( -0.292322 0.289173 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.34326e-08 ( -1.71176e-08 1.99281e-08 ) ergs/cm2
Band function
Time interval is from 25.168 sec. to 26.168 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20158 ( -0.79742 3.35282 )
beta : -9.37166 ( 9.37167 19.3717 )
Epeak [keV] : 33.2644 ( -23.2008 -33.1925 )
Norm@50keV : 1.89784E-02 ( -0.0189216 3.27801e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.71 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 55 degrees of freedom
# Null hypothesis probability = 1.529667e-01
Photon flux (15-150 keV) in 1 sec: 0.809610 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.34732e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.3815 (-3.58315 4.51806)
R^2/D10^2 : 0.334811 (-0.334811 1.37644)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.13 using 59 PHA bins.
# Reduced chi-squared = 1.178 for 57 degrees of freedom
# Null hypothesis probability = 1.686978e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.435e-09 4.609e-09
25- 50 1.947e-08 1.189e-08
50-150 1.132e-08 8.385e-09
15-150 3.822e-08 2.531e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.6547 (-26.7042 99.3819)
Norm : 4.85385 (-2.23563 4.65991)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.72 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 2.003406e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.173e-08 6.863e-09
25- 50 1.656e-08 1.053e-08
50-150 1.535e-08 1.176e-08
15-150 4.364e-08 2.874e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.90961 (-2.83569 6.23667)
R1^2/D10^2 : 49.5878 (-49.7426 -49.8515)
kT2 [keV] : 12.7797 (-4.4192 9.04234)
R2^2/D10^2 : 0.127418 (-0.115976 0.358393)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.32 using 59 PHA bins.
# Reduced chi-squared = 1.169 for 55 degrees of freedom
# Null hypothesis probability = 1.825382e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.206e-08 6.435e-09
25- 50 1.592e-08 9.510e-09
50-150 1.525e-08 1.211e-08
15-150 4.324e-08 2.297e-08
Plot creation:
Wed Mar 8 21:53:19 EST 2017