batgrbproduct Analysis for Trigger=664624
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 Nov 23 00:17:27 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger664624/GCN5_download_cron
======================================================================
Trigger: 00664624 Segment: 000
BAT Trigger Time: 469886993.616 [s; MET]
Trigger Stop: 469886993.648 [s; MET]
UTC: 2015-11-22T12:09:38.165820 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 274.741929928568 Dec: -15.978148313293 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.88
Image Trigger?: NO
Rate S/N Ratio: 21.6333076527839 [ if not an image trigger ]
Image S/N Ratio: 7.88
Flight Position: [ source = BAT ]
RA: 274.741929928568 Dec: -15.978148313293 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 274.714776906677 Dec: -15.9812444598588 [deg; J2000]
{ 18h 18m 51.5s , -15d 58' 52.5" }
+/- 2.50567593728292 [arcmin] (estimated 90% radius based on SNR)
+/- 1.13106616318943 [arcmin] (formal 1-sigma fit error)
SNR: 8.18890178464485
Angular difference between Flight and Ground position is 1.577207 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 0.0320000052452087 +/- 0.143108374017273
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
T50: 0.0320000052452087 +/- 0.064
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0320000052452087 second)
Measured from: -2.98023223876953e-08
to: 0.0319999754428864 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003115 0.008718 0.009718 0.001853
0.001554 0.001992 0.001878 0.001107 [error]
Peak 0.003115 0.008718 0.009718 0.001853
0.001554 0.001992 0.001878 0.001107 [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 9.97e-10 2.61e-09 5.49e-09 2.97e-08 1.48e-08 3.88e-08 erg/cm2
Error 4.61e-10 7.76e-10 1.45e-09 1.66e-08 3.88e-09 1.75e-08 erg/cm2
Peak flux Power-law 9.91e-01 1.41e+00 1.48e+00 2.88e+00 4.78e+00 6.75e+00 ph/cm2/s
Error 4.65e-01 4.30e-01 3.84e-01 1.48e+00 1.21e+00 1.82e+00 ph/cm2/s
Fluence Cutoff-PL 7.35e-10 2.95e-09 6.51e-09 7.69e-09 1.44e-08 1.79e-08 erg/cm2
Error 5.17e-10 9.94e-10 1.95e-09 1.49e-08 4.05e-09 1.80e-08 erg/cm2
Peak flux Cutoff-PL 7.16e-01 1.56e+00 1.78e+00 1.03e+00 4.73e+00 5.09e+00 ph/cm2/s
Error 3.96e-01 5.29e-01 5.36e-01 1.75e+00 1.21e+00 1.53e+00 ph/cm2/s
Fluence Band 6.08e-10 3.49e-09 5.59e-09 1.36e-08 1.36e-08 2.34e-08 erg/cm2
Error 5.34e-10 -------- 1.93e-09 -------- 3.64e-09 -------- erg/cm2
Peak flux Band 5.34e-01 1.78e+00 1.66e+00 1.81e+00 4.70e+00 5.78e+00 ph/cm2/s
Error -------- -------- 4.85e-01 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.926 0.384 - - 4.16e-02 1.05e-02 46.150 57
CPL -0.461 2.000 100.9 -32.9 1.76e-01 1.01e+00 44.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.926 0.384 - - 4.16e-02 1.05e-02 46.150 57
CPL -0.461 2.000 100.9 -32.9 1.76e-01 1.01e+00 44.170 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 0.032 0.000 0.032
T90 0.032 0.000 0.032
T50 0.032 0.000 0.032
Peak 0.032 -0.000 0.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.7148 -15.9812 0.0234 16.1 -116.6 0.0264 8.2 TRIG_00664624
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-106.715 -86.626 (delta_t = 20.089 [sec])
-85.616 -1.616 (delta_t = 84.000 [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 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.926139 ( -0.397465 0.37006 )
Norm@50keV : 4.16339E-02 ( -0.0105702 0.0104788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.15 using 59 PHA bins.
# Reduced chi-squared = 0.8097 for 57 degrees of freedom
# Null hypothesis probability = 8.473545e-01
Photon flux (15-150 keV) in 0.032 sec: 4.78042 ( -1.21208 1.21548 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48028e-08 ( -3.87014e-09 3.89542e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.460877 ( -2.44017 1.55902 )
Epeak [keV] : 100.932 ( -35.6206 -101.426 )
Norm@50keV : 0.175819 ( -0.177252 1.84146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.17 using 59 PHA bins.
# Reduced chi-squared = 0.7888 for 56 degrees of freedom
# Null hypothesis probability = 8.736112e-01
Photon flux (15-150 keV) in 0.032 sec: 4.73443 ( -1.20881 1.21566 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44029e-08 ( -4.0551e-09 4.04026e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.28641 ( -1.57293 1.7748 )
beta : -1.53359 ( 9.37167 19.3717 )
Epeak [keV] : 53.7710 ( -101.326 224.43 )
Norm@50keV : 7.80454 ( -7.71896 38.1906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7940 for 55 degrees of freedom
# Null hypothesis probability = 8.642943e-01
Photon flux (15-150 keV) in 0.032 sec: 4.69574 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35698e-08 ( -1.35696e-08 -3.6272e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7356 (-5.19627 7.92438)
R^2/D10^2 : 0.197519 (-0.125128 0.275749)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.78 using 59 PHA bins.
# Reduced chi-squared = 0.7856 for 57 degrees of freedom
# Null hypothesis probability = 8.799193e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.556e-10 2.889e-10
25- 50 2.917e-09 1.329e-09
50-150 1.029e-08 4.958e-09
15-150 1.377e-08 6.603e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-67.8955 -200)
Norm : 18.6648 (-5.00128 5.00128)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335204e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.487e-09 9.243e-10
25- 50 2.861e-09 1.714e-09
50-150 6.274e-09 3.835e-09
15-150 1.062e-08 6.558e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.3729 (-12.4938 -12.4938)
R1^2/D10^2 : 0.497659 (-0.49165 -0.49165)
kT2 [keV] : 30.9913 (-31.9472 -31.9472)
R2^2/D10^2 : 4.63497E-02 (-0.04029 0.370265)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7991 for 55 degrees of freedom
# Null hypothesis probability = 8.574203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.350e-10 6.459e-10
25- 50 3.050e-09 3.006e-09
50-150 1.072e-08 7.818e-09
15-150 1.450e-08 1.084e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.926139 ( -0.397465 0.37006 )
Norm@50keV : 4.16339E-02 ( -0.0105702 0.0104788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.15 using 59 PHA bins.
# Reduced chi-squared = 0.8097 for 57 degrees of freedom
# Null hypothesis probability = 8.473545e-01
Photon flux (15-150 keV) in 0.032 sec: 4.78042 ( -1.21208 1.21548 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48028e-08 ( -3.87014e-09 3.89542e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.460877 ( -2.44017 1.55902 )
Epeak [keV] : 100.932 ( -35.6206 -101.426 )
Norm@50keV : 0.175819 ( -0.177252 1.84146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.17 using 59 PHA bins.
# Reduced chi-squared = 0.7888 for 56 degrees of freedom
# Null hypothesis probability = 8.736112e-01
Photon flux (15-150 keV) in 0.032 sec: 4.73443 ( -1.20881 1.21566 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44029e-08 ( -4.0551e-09 4.04026e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.28641 ( -1.57293 1.7748 )
beta : -1.53359 ( 9.37167 19.3717 )
Epeak [keV] : 53.7710 ( -101.326 224.43 )
Norm@50keV : 7.80454 ( -7.71896 38.1906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.67 using 59 PHA bins.
# Reduced chi-squared = 0.7940 for 55 degrees of freedom
# Null hypothesis probability = 8.642943e-01
Photon flux (15-150 keV) in 0.032 sec: 4.69574 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35698e-08 ( -1.35696e-08 -3.6272e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7356 (-5.19627 7.92438)
R^2/D10^2 : 0.197519 (-0.125128 0.275749)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.78 using 59 PHA bins.
# Reduced chi-squared = 0.7856 for 57 degrees of freedom
# Null hypothesis probability = 8.799193e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.556e-10 2.462e-10
25- 50 2.917e-09 1.317e-09
50-150 1.029e-08 5.405e-09
15-150 1.377e-08 6.547e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-67.8955 -200)
Norm : 18.6648 (-5.00128 5.00128)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9262 for 57 degrees of freedom
# Null hypothesis probability = 6.335204e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.487e-09 9.315e-10
25- 50 2.861e-09 1.755e-09
50-150 6.274e-09 3.917e-09
15-150 1.062e-08 6.411e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.3729 (-12.4938 -12.4938)
R1^2/D10^2 : 0.497659 (-0.49165 -0.49165)
kT2 [keV] : 30.9913 (-31.9472 -31.9472)
R2^2/D10^2 : 4.63497E-02 (-0.04029 0.370265)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7991 for 55 degrees of freedom
# Null hypothesis probability = 8.574203e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.350e-10 5.080e-10
25- 50 3.050e-09 2.912e-09
50-150 1.072e-08 8.221e-09
15-150 1.450e-08 1.230e-08
Plot creation:
Mon Nov 23 00:27:08 EST 2015