batgrbproduct Analysis for Trigger=682269
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): Mon Apr 11 04:59:21 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger682269/GCN5_download_cron
======================================================================
Trigger: 00682269 Segment: 000
BAT Trigger Time: 481957804.16 [s; MET]
Trigger Stop: 481957804.416 [s; MET]
UTC: 2016-04-10T05:09:48.056060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 150.68072928178 Dec: 3.44358286327285 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.07
Image Trigger?: NO
Rate S/N Ratio: 55.0726792520575 [ if not an image trigger ]
Image S/N Ratio: 9.07
Flight Position: [ source = BAT ]
RA: 150.68072928178 Dec: 3.44358286327285 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 150.693382971605 Dec: 3.45774751952669 [deg; J2000]
{ 10h 02m 46.4s , +03d 27' 27.9" }
+/- 1.47877460992566 [arcmin] (estimated 90% radius based on SNR)
+/- 0.729531091887874 [arcmin] (formal 1-sigma fit error)
SNR: 17.3940717891231
Angular difference between Flight and Ground position is 1.138694 arcmin
Partial Coding Fraction: 0.3789062 [ including projection effects ]
Duration
T90: 319.195999920368 +/- 40.5299244246392
Measured from: 0.344000101089478
to: 319.540000021458 [s; relative to TRIGTIME]
T50: 219.412000000477 +/- 28.0467102634124
Measured from: 7.94400006532669
to: 227.356000065804 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.043999969959259
to: 1.04399996995926 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.043999969959259
to: 374.307999968529 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.111555 0.138881 0.587956 0.055981
0.114537 0.122214 0.107298 0.103162 [error]
Peak 0.052180 0.148773 0.172376 0.097570
0.011225 0.013633 0.014691 0.013744 [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 3.65e-08 1.15e-07 2.96e-07 2.20e-06 8.07e-07 2.66e-06 erg/cm2
Error 2.97e-08 5.79e-08 9.94e-08 1.70e-06 2.73e-07 1.71e-06 erg/cm2
Peak flux Power-law 6.59e-01 9.98e-01 1.13e+00 2.45e+00 3.52e+00 5.23e+00 ph/cm2/s
Error 1.40e-01 1.28e-01 1.14e-01 5.50e-01 3.45e-01 5.93e-01 ph/cm2/s
Fluence Cutoff-PL 1.67e-09 6.58e-08 4.53e-07 2.36e-07 7.28e-07 7.56e-07 erg/cm2
Error 1.17e-08 7.38e-08 1.46e-07 4.14e-07 2.68e-07 4.30e-07 erg/cm2
Peak flux Cutoff-PL 6.22e-01 1.01e+00 1.16e+00 2.01e+00 3.50e+00 4.80e+00 ph/cm2/s
Error 1.76e-01 1.34e-01 1.43e-01 8.10e-01 3.54e-01 9.98e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.634 0.606 - - 1.71e-04 6.85e-05 74.910 57
CPL -5.734 -0.487 88.8 32.0 1.50e-02 1.87e-01 68.850 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.819 0.173 - - 3.06e-02 3.04e-03 67.130 57
CPL 0.620 0.556 419.5 0.0 3.72e-02 2.39e-02 66.890 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: 352.640000 sec.
T50 in the 50-300 keV band: 263.040000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 374.264 0.044 374.308
T90 319.196 0.344 319.540
T50 219.412 7.944 227.356
Peak 1.000 0.044 1.044
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
150.6934 +3.4577 0.0110 36.7 148.9 1.0399 17.4 TRIG_00682269
------------------------------------------
Foreground time interval of the image:
0.044 9.241 (delta_t = 9.197 [sec])
Background time interval of the image:
-239.160 -11.940 (delta_t = 227.220 [sec])
-11.160 0.044 (delta_t = 11.204 [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 0.044 sec. to 374.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.633953 ( -0.65037 0.561037 )
Norm@50keV : 1.71212E-04 ( -6.94868e-05 6.75026e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.91 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.596093e-02
Photon flux (15-150 keV) in 374.3 sec: 1.99007E-02 ( -0.00716354 0.007494 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.06587e-07 ( -2.72472e-07 2.73965e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.044 sec. to 374.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.73364 ( 5.83166 4.8573 )
Epeak [keV] : 88.8047 ( -17.2751 46.7299 )
Norm@50keV : 1.50404E-02 ( -0.0174871 0.35572 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.85 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 56 degrees of freedom
# Null hypothesis probability = 1.162269e-01
Photon flux (15-150 keV) in 374.3 sec: 1.60673E-02 ( -0.0054026 0.0065335 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.27527e-07 ( -2.55362e-07 2.80392e-07 ) ergs/cm2
Band function
Time interval is from 0.044 sec. to 374.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.27757 ( -3.3565 -4.17185 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 92.8398 ( -18.9265 48.6696 )
Norm@50keV : 5.95816E-03 ( -0.00595973 0.0156715 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.09 using 59 PHA bins.
# Reduced chi-squared = 1.256 for 55 degrees of freedom
# Null hypothesis probability = 9.589202e-02
Photon flux (15-150 keV) in 374.3 sec: 1.69781E-02 ( ) 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] : 28.4277 (-7.96126 15.674)
R^2/D10^2 : 3.90695E-04 (-0.000388328 0.000668275)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.01 using 59 PHA bins.
# Reduced chi-squared = 1.246 for 57 degrees of freedom
# Null hypothesis probability = 1.003937e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.910e-08 1.200e-08
25- 50 1.152e-07 7.035e-08
50-150 6.700e-07 4.218e-07
15-150 8.043e-07 4.800e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-85.5298 -200)
Norm : 8.21221E-02 (-0.0326368 0.0326368)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.84 using 59 PHA bins.
# Reduced chi-squared = 1.436 for 57 degrees of freedom
# Null hypothesis probability = 1.720236e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.666e-08 4.954e-08
25- 50 1.475e-07 9.447e-08
50-150 3.234e-07 2.139e-07
15-150 5.475e-07 3.608e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.09124 (-2.0759 8.19978)
R1^2/D10^2 : 3.14577 (-3.51794 21069.2)
kT2 [keV] : 28.7984 (-8.15681 15.0814)
R2^2/D10^2 : 3.73338E-04 (-0.000265386 0.000626867)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.71 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 55 degrees of freedom
# Null hypothesis probability = 7.535592e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.449e-08 1.877e-08
25- 50 1.132e-07 7.185e-08
50-150 6.701e-07 4.087e-07
15-150 8.178e-07 4.986e-07
Peak spectrum fit
Power-law model
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.818530 ( -0.175523 0.169951 )
Norm@50keV : 3.06487E-02 ( -0.00305201 0.00302594 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.13 using 59 PHA bins.
# Reduced chi-squared = 1.178 for 57 degrees of freedom
# Null hypothesis probability = 1.686172e-01
Photon flux (15-150 keV) in 1 sec: 3.52037 ( -0.344103 0.345016 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.55403e-07 ( -3.69952e-08 3.71588e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.619698 ( -0.764365 0.348155 )
Epeak [keV] : 419.489 ( -419.489 -419.489 )
Norm@50keV : 3.72236E-02 ( -0.00899854 0.0387994 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.89 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 56 degrees of freedom
# Null hypothesis probability = 1.513272e-01
Photon flux (15-150 keV) in 1 sec: 3.49598 ( -0.35436 0.35318 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.53155e-07 ( -3.864e-08 3.8181e-08 ) ergs/cm2
Band function
Time interval is from 0.044 sec. to 1.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.935891 ( 0.935891 0.935891 )
beta : -0.818474 ( -0.169946 0.175735 )
Epeak [keV] : 12.4727 ( -12.4727 -12.4727 )
Norm@50keV : 4.66023E-02 ( -0.0189328 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.13 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.263469e-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] : 25.2308 (-3.27049 4.07997)
R^2/D10^2 : 8.68232E-02 (-0.0310207 0.0450936)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.46 using 59 PHA bins.
# Reduced chi-squared = 1.412 for 57 degrees of freedom
# Null hypothesis probability = 2.206572e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.555e-09 1.897e-09
25- 50 5.446e-08 9.190e-09
50-150 2.567e-07 4.080e-08
15-150 3.207e-07 4.465e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 13.6751 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 115.06 using 59 PHA bins.
# Reduced chi-squared = 2.0186 for 57 degrees of freedom
# Null hypothesis probability = 8.398856e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.405e-08 1.894e-08
25- 50 6.550e-08 2.755e-08
50-150 1.437e-07 7.683e-08
15-150 2.432e-07 1.329e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.75 using 59 PHA bins.
#Fit statistic : Chi-Squared = 70.73 using 59 PHA bins.
#Fit statistic : Chi-Squared = 70.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 67.34 using 59 PHA bins.
# Reduced chi-squared = 1.286 for 55 degrees of freedom
# Reduced chi-squared = 1.286 for 55 degrees of freedom
# Reduced chi-squared = 1.286 for 55 degrees of freedom
# Reduced chi-squared = 1.224 for 55 degrees of freedom
# Null hypothesis probability = 7.481231e-02
# Null hypothesis probability = 7.506375e-02
# Null hypothesis probability = 7.525840e-02
# Null hypothesis probability = 1.228026e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.439e-08 3.886e-09
25- 50 5.158e-08 8.915e-09
50-150 2.622e-07 3.800e-08
15-150 3.282e-07 4.775e-08
Plot creation:
Mon Apr 11 05:04:45 EDT 2016