batgrbproduct Analysis for Trigger=614415
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): Sun Oct 5 20:08:22 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger614415/GCN5_download_cron
======================================================================
Trigger: 00614415 Segment: 000
BAT Trigger Time: 434178799.168 [s; MET]
Trigger Stop: 434178800.576 [s; MET]
UTC: 2014-10-05T05:13:06.554120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 291.108221254116 Dec: 36.0694836240141 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.95
Image Trigger?: NO
Rate S/N Ratio: 26.6082693913001 [ if not an image trigger ]
Image S/N Ratio: 7.95
Flight Position: [ source = BAT ]
RA: 291.108221254116 Dec: 36.0694836240141 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 291.106149275064 Dec: 36.0961092511864 [deg; J2000]
{ 19h 24m 25.5s , +36d 05' 46.0" }
+/- 1.67179139461535 [arcmin] (estimated 90% radius based on SNR)
+/- 0.812696912284571 [arcmin] (formal 1-sigma fit error)
SNR: 14.5977805106792
Angular difference between Flight and Ground position is 1.600694 arcmin
Partial Coding Fraction: 0.06347656 [ including projection effects ]
Duration
T90: 3.47200006246567 +/- 0.590267725173062
Measured from: 0.416000127792358
to: 3.88800019025803 [s; relative to TRIGTIME]
T50: 1.63200002908707 +/- 0.368347680815004
Measured from: 1.08800011873245
to: 2.72000014781952 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.675999999046326
to: 1.67599999904633 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.192000031471252
to: 4.36800003051758 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.346885 0.594906 0.484366 0.246074
0.051130 0.062261 0.057145 0.043461 [error]
Peak 0.067447 0.207758 0.214936 0.100323
0.026452 0.033052 0.033428 0.025446 [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 1.08e-07 2.34e-07 3.96e-07 1.54e-06 1.09e-06 2.28e-06 erg/cm2
Error 2.15e-08 2.92e-08 5.06e-08 4.19e-07 1.30e-07 4.53e-07 erg/cm2
Peak flux Power-law 8.99e-01 1.24e+00 1.27e+00 2.36e+00 4.16e+00 5.77e+00 ph/cm2/s
Error 3.19e-01 2.77e-01 2.35e-01 9.05e-01 7.60e-01 1.10e+00 ph/cm2/s
Fluence Cutoff-PL 1.01e-07 2.44e-07 4.15e-07 9.46e-07 1.08e-06 1.71e-06 erg/cm2
Error 2.48e-08 3.46e-08 4.55e-08 6.41e-07 1.33e-07 6.48e-07 erg/cm2
Peak flux Cutoff-PL 7.48e-01 1.30e+00 1.40e+00 1.27e+00 4.10e+00 4.71e+00 ph/cm2/s
Error 3.78e-01 3.12e-01 3.11e-01 1.26e+00 7.65e-01 1.49e+00 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 1.239 0.177 - - 2.60e-02 2.87e-03 58.860 57
CPL 0.870 0.595 166.8 0.0 3.91e-02 0.00e+00 57.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.970 0.289 - - 3.62e-02 6.52e-03 49.550 57
CPL 0.248 1.148 141.0 -40.5 7.60e-02 1.34e-01 48.370 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: 2.432000 sec.
T50 in the 50-300 keV band: 1.152000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 4.176 0.192 4.368
T90 3.472 0.416 3.888
T50 1.632 1.088 2.720
Peak 1.000 0.676 1.676
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
291.1061 +36.0961 0.0132 38.6 92.4 1.8202 14.6 TRIG_00614415
------------------------------------------
Foreground time interval of the image:
0.192 4.368 (delta_t = 4.176 [sec])
Background time interval of the image:
-239.168 0.192 (delta_t = 239.360 [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 0.192 sec. to 4.368 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23884 ( -0.177931 0.175486 )
Norm@50keV : 2.59556E-02 ( -0.00287056 0.00287032 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.86 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.072907e-01
Photon flux (15-150 keV) in 4.176 sec: 3.06438 ( -0.350703 0.351136 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08799e-06 ( -1.29561e-07 1.29962e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.192 sec. to 4.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.870071 ( -0.73139 0.459444 )
Epeak [keV] : 166.802 ( -166.802 -166.802 )
Norm@50keV : 3.90827E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.91 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.047653e-01
Photon flux (15-150 keV) in 4.176 sec: 3.04577 ( -0.35219 0.35262 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07654e-06 ( -1.33916e-07 1.32955e-07 ) ergs/cm2
Band function
Time interval is from 0.192 sec. to 4.368 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.90656 ( -5.44693 -4.90656 )
beta : -1.37586 ( -0.276339 0.211817 )
Epeak [keV] : 29.0335 ( -7.00662 18.0299 )
Norm@50keV : 805.861 ( -88.457 8715.67 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.62 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.512173e-01
Photon flux (15-150 keV) in 4.176 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] : 18.4319 (-2.6852 3.23025)
R^2/D10^2 : 0.188100 (-0.0788909 0.131774)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.04 using 59 PHA bins.
# Reduced chi-squared = 1.352 for 57 degrees of freedom
# Null hypothesis probability = 3.969373e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.301e-08 1.221e-08
25- 50 2.495e-07 4.671e-08
50-150 6.189e-07 1.178e-07
15-150 9.214e-07 1.449e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 12.7916 (-1.44062 1.44054)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.75 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 57 degrees of freedom
# Null hypothesis probability = 1.767800e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.330e-07 4.335e-08
25- 50 2.558e-07 1.407e-07
50-150 5.611e-07 3.086e-07
15-150 9.499e-07 5.189e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.13391 (-2.32658 2.8518)
R1^2/D10^2 : 1.27003 (-0.705024 1.12539)
kT2 [keV] : 37.3943 (-11.1389 42.46)
R2^2/D10^2 : 1.41820E-02 (-0.0123436 0.0330495)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.81 using 59 PHA bins.
# Reduced chi-squared = 0.9965 for 55 degrees of freedom
# Null hypothesis probability = 4.820287e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.800e-08 4.965e-08
25- 50 2.636e-07 1.259e-07
50-150 7.323e-07 3.917e-07
15-150 1.094e-06 5.240e-07
Peak spectrum fit
Power-law model
Time interval is from 0.676 sec. to 1.676 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.969879 ( -0.297002 0.281924 )
Norm@50keV : 3.62178E-02 ( -0.00654524 0.00649188 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.55 using 59 PHA bins.
# Reduced chi-squared = 0.8693 for 57 degrees of freedom
# Null hypothesis probability = 7.477881e-01
Photon flux (15-150 keV) in 1 sec: 4.16390 ( -0.758497 0.761679 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95902e-07 ( -7.36199e-08 7.40086e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.676 sec. to 1.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.248422 ( -1.43997 0.856495 )
Epeak [keV] : 140.985 ( -59.8907 -140.984 )
Norm@50keV : 7.59934E-02 ( -0.0443503 0.223971 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.37 using 59 PHA bins.
# Reduced chi-squared = 0.8637 for 56 degrees of freedom
# Null hypothesis probability = 7.557928e-01
Photon flux (15-150 keV) in 1 sec: 4.09793 ( -0.76226 0.76699 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.88358e-07 ( -7.7145e-08 7.6339e-08 ) ergs/cm2
Band function
Time interval is from 0.676 sec. to 1.676 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.17504 ( -0.428949 0.359539 )
Epeak [keV] : 34.6334 ( -15.7627 10.9383 )
Norm@50keV : 398.458 ( -68.4698 11574.4 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.75 using 59 PHA bins.
# Reduced chi-squared = 0.8499 for 55 degrees of freedom
# Null hypothesis probability = 7.780755e-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] : 22.5121 (-4.42244 6.05876)
R^2/D10^2 : 0.145467 (-0.0770974 0.145965)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.77 using 59 PHA bins.
# Reduced chi-squared = 0.9082 for 57 degrees of freedom
# Null hypothesis probability = 6.711317e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.350e-08 5.140e-09
25- 50 7.234e-08 2.002e-08
50-150 2.740e-07 9.145e-08
15-150 3.598e-07 1.004e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 16.8785 (-3.15379 3.1536)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.02 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 57 degrees of freedom
# Null hypothesis probability = 3.667426e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.203e-08 2.481e-08
25- 50 8.084e-08 4.641e-08
50-150 1.773e-07 1.025e-07
15-150 3.002e-07 1.758e-07
Double BB
R1^2/D10^2 : 1.07852 ( )
kT2 [keV] : 33.9101 (-29.0134 -33.8507)
R2^2/D10^2 : 3.29030E-02 (-0.0298745 0.0827411)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.77 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.89 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.63 using 59 PHA bins.
# Reduced chi-squared = 0.9412 for 55 degrees of freedom
# Reduced chi-squared = 0.8707 for 55 degrees of freedom
# Reduced chi-squared = 0.8660 for 55 degrees of freedom
# Null hypothesis probability = 5.989477e-01
# Null hypothesis probability = 7.406024e-01
# Null hypothesis probability = 7.493708e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun Oct 5 20:12:09 EDT 2014