batgrbproduct Analysis for Trigger=614094
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): Wed Oct 1 03:39:09 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger614094/GCN5_download_cron
======================================================================
Trigger: 00614094 Segment: 000
BAT Trigger Time: 433798914.624 [s; MET]
Trigger Stop: 433798915.136 [s; MET]
UTC: 2014-09-30T19:41:42.028940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 6.35470319330654 Dec: 24.2750518154783 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.73
Image Trigger?: NO
Rate S/N Ratio: 73.1300211951289 [ if not an image trigger ]
Image S/N Ratio: 9.73
Flight Position: [ source = BAT ]
RA: 6.35470319330654 Dec: 24.2750518154783 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 6.35984917711397 Dec: 24.2981502009492 [deg; J2000]
{ 00h 25m 26.4s , +24d 17' 53.3" }
+/- 1.55082144853169 [arcmin] (estimated 90% radius based on SNR)
+/- 0.690042031947739 [arcmin] (formal 1-sigma fit error)
SNR: 16.2512674924596
Angular difference between Flight and Ground position is 1.414190 arcmin
Partial Coding Fraction: 0.2480469 [ including projection effects ]
Duration
T90: 0.843999922275543 +/- 0.123693180911783
Measured from: -0.0639998912811279
to: 0.780000030994415 [s; relative to TRIGTIME]
T50: 0.383999943733215 +/- 0.098792724251903
Measured from: 0.0480000972747803
to: 0.432000041007996 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.118000030517578
to: 0.881999969482422 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0960000157356262
to: 0.860000014305115 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.067471 0.152474 0.210778 0.134073
0.013680 0.016550 0.017923 0.016548 [error]
Peak 0.066611 0.158487 0.212170 0.136927
0.013909 0.016732 0.018083 0.016687 [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 1.94e-08 6.07e-08 1.56e-07 1.15e-06 4.25e-07 1.39e-06 erg/cm2
Error 4.67e-09 8.61e-09 1.57e-08 2.92e-07 4.43e-08 2.96e-07 erg/cm2
Peak flux Power-law 6.28e-01 1.06e+00 1.35e+00 3.47e+00 4.00e+00 6.51e+00 ph/cm2/s
Error 1.52e-01 1.54e-01 1.33e-01 7.97e-01 4.01e-01 7.96e-01 ph/cm2/s
Fluence Cutoff-PL 1.98e-08 6.13e-08 1.56e-07 1.12e-06 4.23e-07 1.36e-06 erg/cm2
Error 4.75e-09 8.67e-09 1.59e-08 3.83e-07 4.45e-08 3.88e-07 erg/cm2
Peak flux Cutoff-PL 6.31e-01 1.06e+00 1.35e+00 3.43e+00 4.00e+00 6.47e+00 ph/cm2/s
Error 1.54e-01 1.54e-01 1.35e-01 9.93e-01 3.98e-01 9.63e-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 0.637 0.189 - - 3.54e-02 3.84e-03 65.430 57
CPL 0.628 0.331 9999.2 0.0 3.56e-02 9.33e-03 65.470 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.644 0.187 - - 3.44e-02 3.70e-03 66.430 57
CPL 0.636 0.332 9999.2 0.0 3.47e-02 9.23e-03 66.480 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: 0.896000 sec.
T50 in the 50-300 keV band: 0.448000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.956 -0.096 0.860
T90 0.844 -0.064 0.780
T50 0.384 0.048 0.432
Peak 1.000 -0.118 0.882
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
6.3598 +24.2982 0.0118 32.9 79.7 0.5569 16.3 TRIG_00614094
------------------------------------------
Foreground time interval of the image:
-0.096 0.860 (delta_t = 0.956 [sec])
Background time interval of the image:
-52.023 -0.096 (delta_t = 51.927 [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 -0.096 sec. to 0.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.637074 ( -0.194118 0.184173 )
Norm@50keV : 3.53607E-02 ( -0.00388221 0.00379037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.43 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 57 degrees of freedom
# Null hypothesis probability = 2.074969e-01
Photon flux (15-150 keV) in 0.956 sec: 4.11118 ( -0.414015 0.415354 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24756e-07 ( -4.42617e-08 4.44365e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.096 sec. to 0.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.628259 ( -0.389739 0.273204 )
Epeak [keV] : 9999.24 ( )
Norm@50keV : 3.56427E-02 ( -0.00357503 0.0150787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.47 using 59 PHA bins.
# Reduced chi-squared = 1.169 for 56 degrees of freedom
# Null hypothesis probability = 1.810784e-01
Photon flux (15-150 keV) in 0.956 sec: 4.11554 ( -0.20899 0.41004 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.23416e-07 ( -4.35888e-08 4.54167e-08 ) ergs/cm2
Band function
Time interval is from -0.096 sec. to 0.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.690400 ( 0.690212 0.690212 )
beta : -0.637074 ( -0.18424 0.194385 )
Epeak [keV] : 19.2764 ( -19.2806 -19.2806 )
Norm@50keV : 4.93686E-02 ( -0.0178287 607662 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.43 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Null hypothesis probability = 1.586216e-01
Photon flux (15-150 keV) in 0.956 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] : 31.7717 (-4.88545 6.65012)
R^2/D10^2 : 5.42348E-02 (-0.0216331 0.032412)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.99 using 59 PHA bins.
# Reduced chi-squared = 1.491 for 57 degrees of freedom
# Null hypothesis probability = 9.512489e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.899e-09 1.912e-09
25- 50 4.985e-08 8.561e-09
50-150 3.468e-07 5.287e-08
15-150 4.046e-07 5.731e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 15.4145 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 131.09 using 59 PHA bins.
# Reduced chi-squared = 2.2998 for 57 degrees of freedom
# Null hypothesis probability = 9.100945e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.669e-08 2.041e-08
25- 50 7.059e-08 3.878e-08
50-150 1.548e-07 8.556e-08
15-150 2.621e-07 1.438e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.90266 (-3.64557 3.74514)
R1^2/D10^2 : 1.16971 (-0.854163 5.8158)
kT2 [keV] : 55.2496 (-18.1008 -55.264)
R2^2/D10^2 : 1.17464E-02 (-0.00820569 0.0211528)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.90 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 55 degrees of freedom
# Null hypothesis probability = 1.697903e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.062e-08 1.105e-08
25- 50 6.139e-08 3.135e-08
50-150 3.556e-07 1.873e-07
15-150 4.376e-07 2.213e-07
Peak spectrum fit
Power-law model
Time interval is from -0.118 sec. to 0.882 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.644458 ( -0.192117 0.182536 )
Norm@50keV : 3.44071E-02 ( -0.00374409 0.00365922 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.43 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 57 degrees of freedom
# Null hypothesis probability = 1.838807e-01
Photon flux (15-150 keV) in 1 sec: 3.99728 ( -0.400247 0.401565 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.30826e-07 ( -4.46022e-08 4.47835e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.118 sec. to 0.882 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.635799 ( -0.391846 0.27148 )
Epeak [keV] : 9999.24 ( )
Norm@50keV : 3.46813E-02 ( -0.00345412 0.0149965 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.48 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 56 degrees of freedom
# Null hypothesis probability = 1.595427e-01
Photon flux (15-150 keV) in 1 sec: 3.99919 ( -0.39849 0.39821 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.29528e-07 ( -4.3045e-08 4.5658e-08 ) ergs/cm2
Band function
Time interval is from -0.118 sec. to 0.882 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.679410 ( 0.67941 0.67941 )
beta : -0.644509 ( -0.182308 0.19267 )
Epeak [keV] : 19.3557 ( -19.3557 -19.3557 )
Norm@50keV : 4.81063E-02 ( -0.0172346 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.43 using 59 PHA bins.
# Reduced chi-squared = 1.208 for 55 degrees of freedom
# Null hypothesis probability = 1.389180e-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] : 31.5020 (-4.81441 6.51347)
R^2/D10^2 : 5.38697E-02 (-0.0214074 0.0320943)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.31 using 59 PHA bins.
# Reduced chi-squared = 1.514 for 57 degrees of freedom
# Null hypothesis probability = 7.349269e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.112e-09 1.765e-09
25- 50 5.103e-08 1.030e-08
50-150 3.504e-07 5.700e-08
15-150 4.095e-07 5.670e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.360 ( )
Norm : 15.0303 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 132.21 using 59 PHA bins.
# Reduced chi-squared = 2.3194 for 57 degrees of freedom
# Null hypothesis probability = 6.534927e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.743e-08 2.063e-08
25- 50 7.200e-08 3.959e-08
50-150 1.579e-07 8.685e-08
15-150 2.673e-07 1.454e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.36003 (-3.71364 2.71267)
R1^2/D10^2 : 0.991036 (-0.700863 2.54175)
kT2 [keV] : 57.3872 (-19.6459 -57.3872)
R2^2/D10^2 : 1.03036E-02 (-0.00697077 0.0136674)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.85 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 55 degrees of freedom
# Null hypothesis probability = 1.501370e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.055e-08 1.106e-08
25- 50 6.360e-08 3.184e-08
50-150 3.589e-07 1.767e-07
15-150 4.430e-07 2.223e-07
Plot creation:
Wed Oct 1 03:41:30 EDT 2014