batgrbproduct Analysis for Trigger=685245
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): Sat May 7 03:36:44 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger685245/GCN5_download_cron
======================================================================
Trigger: 00685245 Segment: 000
BAT Trigger Time: 484198172.096 [s; MET]
Trigger Stop: 484198175.168 [s; MET]
UTC: 2016-05-06T03:29:15.868860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 265.773548793878 Dec: -46.1170075164307 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.19
Image Trigger?: NO
Rate S/N Ratio: 10.0995049383621 [ if not an image trigger ]
Image S/N Ratio: 7.19
Flight Position: [ source = BAT ]
RA: 265.773548793878 Dec: -46.1170075164307 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 265.85236379341 Dec: -46.1261546693323 [deg; J2000]
{ 17h 43m 24.6s , -46d 07' 34.2" }
+/- 1.58268655029237 [arcmin] (estimated 90% radius based on SNR)
+/- 0.583571080489535 [arcmin] (formal 1-sigma fit error)
SNR: 15.7858694224004
Angular difference between Flight and Ground position is 3.323375 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 260.67199999094 +/- 78.0070283669051
Measured from: -2.36799991130829
to: 258.304000079632 [s; relative to TRIGTIME]
T50: 124.835999965668 +/- 70.2583398541664
Measured from: 13.8400000929832
to: 138.676000058651 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 98.783999979496
to: 99.783999979496 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.09600001573563
to: 336.01599997282 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.359011 1.059897 0.693341 -0.074753
0.120131 0.111225 0.090980 0.076133 [error]
Peak 0.021375 0.010521 0.016894 0.012958
0.006617 0.006140 0.004974 0.004035 [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 3.81e-07 4.82e-07 4.45e-07 7.19e-07 1.55e-06 2.03e-06 erg/cm2
Error 6.15e-08 5.19e-08 9.10e-08 2.98e-07 2.00e-07 3.92e-07 erg/cm2
Peak flux Power-law 7.48e-02 1.10e-01 1.20e-01 2.45e-01 3.80e-01 5.49e-01 ph/cm2/s
Error 7.71e-02 8.52e-02 3.93e-02 2.78e-01 2.63e-01 2.29e-01 ph/cm2/s
Fluence Cutoff-PL 3.82e-07 4.82e-07 4.44e-07 7.07e-07 1.55e-06 2.02e-06 erg/cm2
Error 6.15e-08 5.25e-08 6.92e-08 3.89e-07 2.01e-07 4.62e-07 erg/cm2
Peak flux Cutoff-PL 8.13e-02 1.14e-01 1.19e-01 2.26e-01 3.86e-01 5.40e-01 ph/cm2/s
Error 8.45e-02 6.51e-02 3.94e-02 3.19e-01 1.39e-01 3.22e-01 ph/cm2/s
Fluence Band 7.47e-07 1.47e-06 1.57e-06 2.01e-06 4.55e-06 5.83e-06 erg/cm2
Error 1.49e-07 -------- -------- -------- -------- -------- 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 2.116 0.231 - - 4.83e-04 6.96e-05 56.270 57
CPL 2.405 0.000 155.1 0.0 3.50e-04 0.00e+00 55.860 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.875 0.934 - - 3.31e-03 1.39e-03 46.450 57
CPL 0.889 0.957 10000.0 0.0 3.35e-03 -8.63e-04 46.470 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: 24.384000 sec.
T50 in the 50-300 keV band: 11.520000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 345.112 -9.096 336.016
T90 260.672 -2.368 258.304
T50 124.836 13.840 138.676
Peak 1.000 98.784 99.784
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
265.8524 -46.1262 0.0122 17.2 -16.1 1.3943 15.8 TRIG_00685245
------------------------------------------
Foreground time interval of the image:
-9.096 43.005 (delta_t = 52.101 [sec])
Background time interval of the image:
-218.995 -9.096 (delta_t = 209.899 [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 -9.096 sec. to 336.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11597 ( -0.223471 0.239464 )
Norm@50keV : 4.83336E-04 ( -7.08996e-05 6.83265e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.27 using 59 PHA bins.
# Reduced chi-squared = 0.9872 for 57 degrees of freedom
# Null hypothesis probability = 5.024781e-01
Photon flux (15-150 keV) in 345.1 sec: 7.66461E-02 ( -0.00825475 0.00827226 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55222e-06 ( -1.97832e-07 2.02259e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.096 sec. to 336.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40510 ( )
Epeak [keV] : 155.091 ( )
Norm@50keV : 3.50252E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.86 using 59 PHA bins.
# Reduced chi-squared = 0.9975 for 56 degrees of freedom
# Null hypothesis probability = 4.801790e-01
Photon flux (15-150 keV) in 345.1 sec: 7.67267E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55008e-06 ( -1.97504e-07 2.04417e-07 ) ergs/cm2
Band function
Time interval is from -9.096 sec. to 336.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.30616 ( 2.30616 2.30616 )
beta : -2.11597 ( -0.239001 0.223286 )
Epeak [keV] : 13.1672 ( -13.1672 -13.1672 )
Norm@50keV : 6.56921E-02 ( -0.00963626 0.00928654 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.27 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.271777e-01
Photon flux (15-150 keV) in 345.1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.55494e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.70993 (-1.51333 1.84692)
R^2/D10^2 : 3.66729E-02 (-0.0176878 0.0344439)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.27 using 59 PHA bins.
# Reduced chi-squared = 1.601 for 57 degrees of freedom
# Null hypothesis probability = 2.664477e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.404e-07 4.876e-08
25- 50 5.730e-07 8.645e-08
50-150 2.745e-07 7.898e-08
15-150 1.088e-06 1.548e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 62.6207 (-18.7991 32.3514)
Norm : 0.383211 (-0.0700123 0.088352)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.94 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 57 degrees of freedom
# Null hypothesis probability = 3.360322e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.346e-07 4.928e-08
25- 50 5.158e-07 5.832e-08
50-150 6.078e-07 1.743e-07
15-150 1.458e-06 2.205e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.98914 (-1.10351 1.36013)
R1^2/D10^2 : 1.11750 (-0.819827 5.0891)
kT2 [keV] : 18.0431 (-3.9674 6.15712)
R2^2/D10^2 : 2.84050E-03 (-0.0019019 0.00467276)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.09 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.714058e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.100e-07 2.002e-07
25- 50 4.198e-07 1.534e-07
50-150 7.009e-07 2.839e-07
15-150 1.531e-06 5.494e-07
Peak spectrum fit
Power-law model
Time interval is from 98.784 sec. to 99.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.875180 ( -1.07605 0.79244 )
Norm@50keV : 3.30850E-03 ( -0.00159662 0.00119147 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.45 using 59 PHA bins.
# Reduced chi-squared = 0.8149 for 57 degrees of freedom
# Null hypothesis probability = 8.397130e-01
Photon flux (15-150 keV) in 1 sec: 0.379502 ( -0.379502 0.146976 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.75071e-08 ( -1.24411e-08 1.23117e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 98.784 sec. to 99.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.888648 ( -1.20908 0.70591 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 3.34530E-03 ( -0.00161738 -0.00334401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.47 using 59 PHA bins.
# Reduced chi-squared = 0.8299 for 56 degrees of freedom
# Null hypothesis probability = 8.141203e-01
Photon flux (15-150 keV) in 1 sec: 0.386010 ( -0.138389 0.140314 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.68074e-08 ( -1.18685e-08 1.31928e-08 ) ergs/cm2
Band function
Time interval is from 98.784 sec. to 99.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99999 ( 9.99999 9.99999 )
beta : -0.873956 ( -0.793709 1.07537 )
Epeak [keV] : 13.8240 ( -13.824 -13.824 )
Norm@50keV : 0.449522 ( -0.21692 0.162021 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.45 using 59 PHA bins.
# Reduced chi-squared = 0.8445 for 55 degrees of freedom
# Null hypothesis probability = 7.874006e-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] : 46.5392 (-22.8223 -46.7785)
R^2/D10^2 : 1.63827E-03 (-0.00161304 0.0083067)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.72 using 59 PHA bins.
# Reduced chi-squared = 0.8722 for 57 degrees of freedom
# Null hypothesis probability = 7.423134e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.758e-09 3.014e-09
25- 50 6.732e-09 4.191e-09
50-150 1.186e-09 1.094e-09
15-150 1.268e-08 8.485e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-108.456 -199.363)
Norm : 1.67852 (-0.558608 0.558641)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.61 using 59 PHA bins.
# Reduced chi-squared = 0.8704 for 57 degrees of freedom
# Null hypothesis probability = 7.457396e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.180e-09 2.638e-09
25- 50 8.040e-09 4.959e-09
50-150 1.763e-08 1.087e-08
15-150 2.985e-08 1.829e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.06335 (-1.99443 3.35445)
R1^2/D10^2 : 2.04081 (-1.83701 20.3196)
kT2 [keV] : 86.3636 (-56.0166 -88.7074)
R2^2/D10^2 : 4.11431E-04 (-0.000327832 0.00337359)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.14 using 59 PHA bins.
# Reduced chi-squared = 0.7480 for 55 degrees of freedom
# Null hypothesis probability = 9.173512e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.431e-09 3.618e-09
25- 50 5.202e-09 2.939e-09
50-150 3.094e-08 2.061e-08
15-150 4.157e-08 2.479e-08
Plot creation:
Sat May 7 03:42:54 EDT 2016