batgrbproduct Analysis for Trigger=658045
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): Fri Oct 9 04:00:37 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger658045/GCN5_download_cron
======================================================================
Trigger: 00658045 Segment: 000
BAT Trigger Time: 465976082.496 [s; MET]
Trigger Stop: 465976083.52 [s; MET]
UTC: 2015-10-08T05:47:47.254140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 117.932480117515 Dec: -54.0504059997433 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.81
Image Trigger?: NO
Rate S/N Ratio: 28.7923600977759 [ if not an image trigger ]
Image S/N Ratio: 6.81
Flight Position: [ source = BAT ]
RA: 117.932480117515 Dec: -54.0504059997433 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 118.053166592299 Dec: -54.0070147002723 [deg; J2000]
{ 07h 52m 12.8s , -54d 00' 25.3" }
+/- 5.59031247397846 [arcmin] (estimated 90% radius based on SNR)
+/- 2.81951088135282 [arcmin] (formal 1-sigma fit error)
SNR: 2.6022711448314
Angular difference between Flight and Ground position is 4.986871 arcmin
Partial Coding Fraction: 0.7265625 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 2.98023223876953e-08
to: 1.02400001883507 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.009238 0.024999 0.005746 0.055622
0.012178 0.014663 0.013742 0.017049 [error]
Peak -0.009238 0.024999 0.005746 0.055622
0.012178 0.014663 0.013742 0.017049 [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 7.68e-107.54e-12 3.60e-091.47e-10 1.43e-082.78e-09 2.15e-075.33e-07 4.26e-081.47e-08 2.33e-075.36e-07 erg/cm2
Error 2.46e-09 5.41e-09 1.37e-08 6.57e-07 3.75e-08 6.63e-07 erg/cm2
Peak flux Power-law 2.34e-022.21e-04 5.85e-022.20e-03 1.17e-014.90e-03 5.83e-011.21e+00 3.15e-017.88e-02 7.79e-011.24e+00 ph/cm2/s
Error 7.71e-02 9.16e-02 1.12e-01 1.53e+00 3.18e-01 1.58e+00 ph/cm2/s
Fluence Cutoff-PL 6.95e-10 3.61e-09 1.47e-08 1.38e-07 4.24e-08 1.41e-07 erg/cm2
Error 2.45e-09 9.96e-09 -------- 9.43e-07 2.84e-08 4.16e-06 erg/cm2
Peak flux Cutoff-PL 2.47e-02 6.03e-02 1.17e-01 5.59e-01 3.17e-01 7.64e-01 ph/cm2/s
Error 7.67e-02 9.65e-02 1.24e-01 3.06e+01 3.10e-01 -------- 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 -2.146 0.913 - - 1.56e-04 2.68e-03 46.400 57
CPL -0.018 0.000 10000.0 0.0 2.35e-03 0.00e+00 46.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.146 0.913 - - 1.56e-04 2.68e-03 46.400 57
CPL -0.018 0.000 10000.0 0.0 2.35e-03 0.00e+00 46.660 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
118.0532 -54.0070 0.0744 32.1 -151.5 0.0747 2.6 TRIG_00658045
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-35.295 -10.496 (delta_t = 24.799 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14582 ( 2.13942 3.96602 )
Norm@50keV : 1.55686E-04 ( -0.000162443 0.00520016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 59 PHA bins.
# Reduced chi-squared = 0.8140 for 57 degrees of freedom
# Null hypothesis probability = 8.409716e-01
Photon flux (15-150 keV) in 1.024 sec: 0.314985 7.88258E-02 ( -0.31224 0.322927 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97846e-16 ( -3.73707e-08 3.76862e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.80082E-02 ( 0.112682 0.112682 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.35259E-03 ( -0.00235456 -0.00235456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8333 for 56 degrees of freedom
# Null hypothesis probability = 8.085513e-01
Photon flux (15-150 keV) in 1.024 sec: 0.317189 9.17935E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2358e-08 ( -1.89548e-08 3.7821e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.185001 ( 0.185001 0.185001 )
beta : -2.86975E-03 ( 0.00286977 0.00286977 )
Epeak [keV] : 28.3943 ( -28.3943 -28.3943 )
Norm@50keV : 3.19772E-03 ( -0.00319774 16127.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8484 for 55 degrees of freedom
# Null hypothesis probability = 7.807197e-01
Photon flux (15-150 keV) in 1.024 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] : 196.409 (-196.307 -196.307)
R^2/D10^2 : 1.50885E-04 (-0.000151088 0.204051)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.87 using 59 PHA bins.
# Reduced chi-squared = 0.8224 for 57 degrees of freedom
# Null hypothesis probability = 8.283589e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.20 using 59 PHA bins.
# Reduced chi-squared = 0.8808 for 57 degrees of freedom
# Null hypothesis probability = 7.259806e-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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.2418 (-13.2094 -13.2094)
R1^2/D10^2 : 3.07219E-02 (-0.0299288 -0.0299288)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 1.14757E-04 (-0.00011899 0.142581)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.84 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8516 for 55 degrees of freedom
# Reduced chi-squared = 0.8440 for 55 degrees of freedom
# Null hypothesis probability = 7.752457e-01
# Null hypothesis probability = 7.883421e-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
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14582 ( 2.13942 3.96602 )
Norm@50keV : 1.55686E-04 ( -0.000162443 0.00520016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 59 PHA bins.
# Reduced chi-squared = 0.8140 for 57 degrees of freedom
# Null hypothesis probability = 8.409716e-01
Photon flux (15-150 keV) in 1.024 sec: 0.314985 7.88258E-02 ( -0.31224 0.322927 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97846e-16 ( -3.73707e-08 3.76862e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.80082E-02 ( 0.112682 0.112682 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.35259E-03 ( -0.00235456 -0.00235456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8333 for 56 degrees of freedom
# Null hypothesis probability = 8.085513e-01
Photon flux (15-150 keV) in 1.024 sec: 0.317189 9.17935E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2358e-08 ( -1.89548e-08 3.7821e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.185001 ( 0.185001 0.185001 )
beta : -2.86975E-03 ( 0.00286977 0.00286977 )
Epeak [keV] : 28.3943 ( -28.3943 -28.3943 )
Norm@50keV : 3.19772E-03 ( -0.00319774 16127.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.66 using 59 PHA bins.
# Reduced chi-squared = 0.8484 for 55 degrees of freedom
# Null hypothesis probability = 7.807197e-01
Photon flux (15-150 keV) in 1.024 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] : 196.409 (-196.307 -196.307)
R^2/D10^2 : 1.50885E-04 (-0.000151088 0.204051)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.87 using 59 PHA bins.
# Reduced chi-squared = 0.8224 for 57 degrees of freedom
# Null hypothesis probability = 8.283589e-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
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.20 using 59 PHA bins.
# Reduced chi-squared = 0.8808 for 57 degrees of freedom
# Null hypothesis probability = 7.259806e-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
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 13.2418 (-13.2094 -13.2094)
R1^2/D10^2 : 3.07219E-02 (-0.0299288 -0.0299288)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 1.14757E-04 (-0.00011899 0.142581)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.84 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8516 for 55 degrees of freedom
# Reduced chi-squared = 0.8440 for 55 degrees of freedom
# Null hypothesis probability = 7.752457e-01
# Null hypothesis probability = 7.883421e-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:
Fri Oct 9 04:04:30 EDT 2015