batgrbproduct Analysis for Trigger=639636
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 May 3 04:56:27 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger639636/GCN5_download_cron
======================================================================
Trigger: 00639636 Segment: 000
BAT Trigger Time: 452259056 [s; MET]
Trigger Stop: 452259120 [s; MET]
UTC: 2015-05-02T11:30:42.475220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 350.78766874796 Dec: 7.8971282821733 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.38
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.38
Flight Position: [ source = BAT ]
RA: 350.78766874796 Dec: 7.8971282821733 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 350.815707851611 Dec: 7.89998977497587 [deg; J2000]
{ 23h 23m 15.8s , +07d 54' 00.0" }
+/- 4.09717749477814 [arcmin] (estimated 90% radius based on SNR)
+/- 2.57169773383123 [arcmin] (formal 1-sigma fit error)
SNR: 4.05639393723656
Angular difference between Flight and Ground position is 1.675207 arcmin
Partial Coding Fraction: 0.8046875 [ 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 0.186944 0.225216 0.098358 -0.046753
0.053254 0.055863 0.049735 0.044445 [error]
Peak 0.186944 0.225216 0.098358 -0.046753
0.053254 0.055863 0.049735 0.044445 [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 6.34e-08 8.56e-08 8.51e-08 1.52e-07 2.84e-07 3.86e-07 erg/cm2
Error 2.38e-08 2.57e-08 4.41e-08 1.81e-07 1.04e-07 2.12e-07 erg/cm2
Peak flux Power-law 3.23e-02 2.41e-02 1.20e-02 8.49e-03 7.23e-02 7.68e-02 ph/cm2/s
Error 1.23e-02 7.11e-03 6.01e-03 9.49e-03 2.10e-02 2.29e-02 ph/cm2/s
Fluence Cutoff-PL 5.81e-08 1.03e-07 7.05e-08 1.35e-08 2.44e-07 2.46e-07 erg/cm2
Error 2.72e-08 3.90e-08 5.48e-08 1.51e-07 1.06e-07 2.05e-07 erg/cm2
Peak flux Cutoff-PL 2.91e-02 2.89e-02 1.05e-02 1.08e-03 6.94e-02 6.96e-02 ph/cm2/s
Error 1.42e-02 1.07e-02 7.55e-03 8.01e-03 2.10e-02 2.29e-02 ph/cm2/s
Fluence Band 5.79e-08 1.02e-07 7.06e-08 4.25e-08 2.54e-07 2.78e-07 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 2.009 0.552 - - 4.80e-04 1.86e-04 56.780 57
CPL 0.376 3.119 38.0 0.0 4.75e-03 1.48e+00 55.700 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.009 0.552 - - 4.80e-04 1.86e-04 56.780 57
CPL 0.376 3.124 38.0 0.0 4.75e-03 1.48e+00 55.700 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 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
350.8157 +7.9000 0.0474 31.3 -163.3 0.4694 4.1 TRIG_00639636
------------------------------------------
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: 2.00894 ( -0.504691 0.600025 )
Norm@50keV : 4.80233E-04 ( -0.000190574 0.000182052 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.78 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 57 degrees of freedom
# Null hypothesis probability = 4.834723e-01
Photon flux (15-150 keV) in 64 sec: 7.23329E-02 ( -0.0209466 0.020954 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.83579e-07 ( -1.00155e-07 1.07918e-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: 0.376116 ( -4.47655 1.76219 )
Epeak [keV] : 37.9987 ( -37.9905 -37.9905 )
Norm@50keV : 4.74559E-03 ( -0.00491517 2.95319 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 0.9947 for 56 degrees of freedom
# Null hypothesis probability = 4.861186e-01
Photon flux (15-150 keV) in 64 sec: 6.94414E-02 ( -0.0208326 0.0212466 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43627e-07 ( -8.6768e-08 1.24685e-07 ) 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 : -0.566977 ( 0.96952 0.96952 )
beta : -4.17828 ( 4.4382 13.9615 )
Epeak [keV] : 37.2821 ( -38.1272 25.8298 )
Norm@50keV : 3.71834E-03 ( -0.00252237 66.3883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.482095e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.54037e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.54617 (-2.57709 3.43478)
R^2/D10^2 : 4.24058E-02 (-0.0424012 0.0974781)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.43 using 59 PHA bins.
# Reduced chi-squared = 0.9900 for 57 degrees of freedom
# Null hypothesis probability = 4.964896e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.949e-08 2.947e-08
25- 50 1.151e-07 6.682e-08
50-150 5.241e-08 3.971e-08
15-150 2.170e-07 1.321e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.4581 (-31.4393 135.3)
Norm : 0.389283 (-0.147384 0.251655)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.00 using 59 PHA bins.
# Reduced chi-squared = 0.9825 for 57 degrees of freedom
# Null hypothesis probability = 5.124717e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.234e-08 3.588e-08
25- 50 9.412e-08 5.634e-08
50-150 1.048e-07 8.163e-08
15-150 2.613e-07 1.656e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.71240 (-3.7124 -3.7124)
R1^2/D10^2 : 0.642479 (-0.642479 -0.642479)
kT2 [keV] : 11.3781 (-11.3781 -11.3781)
R2^2/D10^2 : 1.86955E-02 (-0.0186955 0.0945513)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.61 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.518119e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.830e-08 3.081e-08
25- 50 1.036e-07 6.349e-08
50-150 7.212e-08 4.659e-08
15-150 2.340e-07 1.445e-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: 2.00894 ( -0.504691 0.600025 )
Norm@50keV : 4.80233E-04 ( -0.000190574 0.000182052 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.78 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 57 degrees of freedom
# Null hypothesis probability = 4.834723e-01
Photon flux (15-150 keV) in 64 sec: 7.23329E-02 ( -0.0209466 0.020954 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.83579e-07 ( -1.00155e-07 1.07918e-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: 0.376116 ( -4.47655 1.77122 )
Epeak [keV] : 37.9987 ( -37.9905 -37.9905 )
Norm@50keV : 4.74559E-03 ( -0.00491517 2.95319 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 0.9947 for 56 degrees of freedom
# Null hypothesis probability = 4.861186e-01
Photon flux (15-150 keV) in 64 sec: 6.94414E-02 ( -0.0208326 0.0212466 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43627e-07 ( -8.6768e-08 1.24685e-07 ) 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 : -0.566977 ( 0.96952 0.96952 )
beta : -4.17828 ( 4.4382 13.9615 )
Epeak [keV] : 37.2821 ( -38.1272 25.8298 )
Norm@50keV : 3.71834E-03 ( -0.00252237 66.3883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.482095e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.54037e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.54617 (-2.57709 3.43478)
R^2/D10^2 : 4.24058E-02 (-0.0424012 0.0974781)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.43 using 59 PHA bins.
# Reduced chi-squared = 0.9900 for 57 degrees of freedom
# Null hypothesis probability = 4.964896e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.949e-08 2.990e-08
25- 50 1.151e-07 6.947e-08
50-150 5.241e-08 4.106e-08
15-150 2.170e-07 1.375e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.4581 (-31.4393 135.3)
Norm : 0.389283 (-0.147384 0.251655)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.00 using 59 PHA bins.
# Reduced chi-squared = 0.9825 for 57 degrees of freedom
# Null hypothesis probability = 5.124717e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.234e-08 3.207e-08
25- 50 9.412e-08 5.633e-08
50-150 1.048e-07 8.361e-08
15-150 2.613e-07 1.704e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.71240 (-3.7124 -3.7124)
R1^2/D10^2 : 0.642479 (-0.642479 -0.642479)
kT2 [keV] : 11.3781 (-11.3781 -11.3781)
R2^2/D10^2 : 1.86955E-02 (-0.0186955 0.0945513)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.61 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.518119e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.830e-08 2.645e-08
25- 50 1.036e-07 6.160e-08
50-150 7.212e-08 4.717e-08
15-150 2.340e-07 1.304e-07
Plot creation:
Sun May 3 05:01:45 EDT 2015