batgrbproduct Analysis for Trigger=650411
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 Jul 27 21:56:16 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger650411/GCN5_download_cron
======================================================================
Trigger: 00650411 Segment: 000
BAT Trigger Time: 459655136 [s; MET]
Trigger Stop: 459655200 [s; MET]
UTC: 2015-07-27T01:58:41.091340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 54.3521165119978 Dec: 53.2186671157837 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.54
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.54
Flight Position: [ source = BAT ]
RA: 54.3521165119978 Dec: 53.2186671157837 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 54.3787010127372 Dec: 53.1971926524779 [deg; J2000]
{ 03h 37m 30.9s , +53d 11' 49.9" }
+/- 2.40266972525266 [arcmin] (estimated 90% radius based on SNR)
+/- 1.37949667805527 [arcmin] (formal 1-sigma fit error)
SNR: 8.69500227230253
Angular difference between Flight and Ground position is 1.603983 arcmin
Partial Coding Fraction: 0.1601562 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.296417 0.413691 0.077743 0.014910
0.110245 0.108799 0.092521 0.081088 [error]
Peak 1.296417 0.413691 0.077743 0.014910
0.110245 0.108799 0.092521 0.081088 [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 4.82e-07 1.56e-07 2.81e-08 5.89e-09 6.70e-07 6.72e-07 erg/cm2
Error 8.14e-08 7.37e-08 3.25e-08 1.48e-08 1.40e-07 1.44e-07 erg/cm2
Peak flux Power-law 2.59e-01 4.81e-02 4.33e-03 4.23e-04 3.11e-01 3.11e-01 ph/cm2/s
Error 4.51e-02 2.14e-02 4.84e-03 9.93e-04 5.15e-02 5.15e-02 ph/cm2/s
Fluence Cutoff-PL 4.85e-07 1.43e-07 2.28e-08 4.26e-09 6.55e-07 6.54e-07 erg/cm2
Error 8.25e-08 7.50e-08 3.71e-08 1.50e-08 -------- 1.46e-07 erg/cm2
Peak flux Cutoff-PL 2.59e-01 4.77e-02 4.25e-03 4.08e-04 3.11e-01 3.11e-01 ph/cm2/s
Error -------- -------- -------- -------- 5.15e-02 5.15e-02 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.74e-01 2.88e-03 1.07e-05 3.92e-08 1.77e-01 1.77e-01 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 4.472 0.901 - - 3.31e-04 2.88e-04 80.310 57
CPL 1.830 0.000 1.2 0.0 6.35e-02 0.00e+00 84.230 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.472 0.901 - - 3.31e-04 2.88e-04 80.310 57
CPL 1.830 0.000 1.2 0.0 6.35e-02 0.00e+00 84.230 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
54.3787 +53.1972 0.0221 41.0 -119.5 1.8906 8.7 TRIG_00650411
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.47239 ( -0.818128 0.984438 )
Norm@50keV : 3.30643E-04 ( -0.000209814 0.000365674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.31 using 59 PHA bins.
# Reduced chi-squared = 1.409 for 57 degrees of freedom
# Null hypothesis probability = 2.265005e-02
Photon flux (15-150 keV) in 64 sec: 0.311309 ( -0.0514846 0.0515026 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70374e-07 ( -1.33058e-07 1.46586e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83025 ( )
Epeak [keV] : 1.21077 ( )
Norm@50keV : 6.34753E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.23 using 59 PHA bins.
# Reduced chi-squared = 1.504 for 56 degrees of freedom
# Null hypothesis probability = 8.705066e-03
Photon flux (15-150 keV) in 64 sec: 0.310905 ( -0.051315 0.051619 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.54835e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.53481 ( 6.53481 6.53481 )
beta : -4.47304 ( -0.985017 0.818585 )
Epeak [keV] : 12.2738 ( -12.2738 -12.2738 )
Norm@50keV : 4.49113E-02 ( -0.0284918 0.0497203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.31 using 59 PHA bins.
# Reduced chi-squared = 1.460 for 55 degrees of freedom
# Null hypothesis probability = 1.461483e-02
Photon flux (15-150 keV) in 64 sec: 0.176920 ( ) 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] : 2.70772 (-0.452343 0.610869)
R^2/D10^2 : 81.8591 (-81.8592 222.962)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.35 using 59 PHA bins.
# Reduced chi-squared = 1.515 for 57 degrees of freedom
# Null hypothesis probability = 7.298855e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.034e-07 2.741e-07
25- 50 5.055e-08 3.105e-08
50-150 3.385e-11 3.530e-11
15-150 5.540e-07 3.058e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.93120 (-1.71457 3.46838)
Norm : 38.6006 (-27.1504 89.2443)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.63 using 59 PHA bins.
# Reduced chi-squared = 1.485 for 57 degrees of freedom
# Null hypothesis probability = 1.020714e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.953e-07 2.345e-07
25- 50 9.004e-08 4.867e-08
50-150 1.033e-09 1.021e-09
15-150 5.864e-07 2.436e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.19760 (-0.488515 0.555373)
R1^2/D10^2 : 303.838 (-240.808 1889.63)
kT2 [keV] : 9.93483 (-3.58089 7.9542)
R2^2/D10^2 : 5.68633E-02 (-0.0523514 0.181087)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.92 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 55 degrees of freedom
# Null hypothesis probability = 3.829371e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.692e-07 2.540e-07
25- 50 1.966e-07 1.196e-07
50-150 9.208e-08 7.485e-08
15-150 7.578e-07 3.894e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.47239 ( -0.818128 0.984438 )
Norm@50keV : 3.30643E-04 ( -0.000209814 0.000365674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.31 using 59 PHA bins.
# Reduced chi-squared = 1.409 for 57 degrees of freedom
# Null hypothesis probability = 2.265005e-02
Photon flux (15-150 keV) in 64 sec: 0.311309 ( -0.0514846 0.0515026 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.70374e-07 ( -1.33058e-07 1.46586e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83025 ( )
Epeak [keV] : 1.21077 ( )
Norm@50keV : 6.34753E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.23 using 59 PHA bins.
# Reduced chi-squared = 1.504 for 56 degrees of freedom
# Null hypothesis probability = 8.705066e-03
Photon flux (15-150 keV) in 64 sec: 0.310905 ( -0.051315 0.051619 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.54835e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.53481 ( 6.53481 6.53481 )
beta : -4.47304 ( -0.985017 0.818585 )
Epeak [keV] : 12.2738 ( -12.2738 -12.2738 )
Norm@50keV : 4.49113E-02 ( -0.0284918 0.0497203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.31 using 59 PHA bins.
# Reduced chi-squared = 1.460 for 55 degrees of freedom
# Null hypothesis probability = 1.461483e-02
Photon flux (15-150 keV) in 64 sec: 0.176920 ( ) 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] : 2.70772 (-0.452343 0.610869)
R^2/D10^2 : 81.8591 (-81.8592 222.962)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.35 using 59 PHA bins.
# Reduced chi-squared = 1.515 for 57 degrees of freedom
# Null hypothesis probability = 7.298855e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.034e-07 2.785e-07
25- 50 5.055e-08 3.029e-08
50-150 3.385e-11 3.773e-11
15-150 5.540e-07 3.015e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.93120 (-1.71457 3.46838)
Norm : 38.6006 (-27.1504 89.2443)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.63 using 59 PHA bins.
# Reduced chi-squared = 1.485 for 57 degrees of freedom
# Null hypothesis probability = 1.020714e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.953e-07 1.988e-07
25- 50 9.004e-08 5.207e-08
50-150 1.033e-09 1.067e-09
15-150 5.864e-07 2.679e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.19760 (-0.488515 0.555373)
R1^2/D10^2 : 303.838 (-240.808 1889.63)
kT2 [keV] : 9.93483 (-3.58089 7.9542)
R2^2/D10^2 : 5.68633E-02 (-0.0523514 0.181087)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.92 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 55 degrees of freedom
# Null hypothesis probability = 3.829371e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.692e-07 2.516e-07
25- 50 1.966e-07 1.233e-07
50-150 9.208e-08 7.014e-08
15-150 7.578e-07 4.038e-07
Plot creation:
Mon Jul 27 22:00:19 EDT 2015