batgrbproduct Analysis for Trigger=569022
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): Tue Sep 3 00:04:09 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger569022/batgroup_hand_proc
======================================================================
Trigger: 00569022 Segment: 000
BAT Trigger Time: 399719608 [s; MET]
Trigger Stop: 399719672 [s; MET]
UTC: 2013-09-01T09:13:17.020320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 263.611033810463 Dec: -30.4023922121824 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.41
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 18.41
Flight Position: [ source = BAT ]
RA: 263.611033810463 Dec: -30.4023922121824 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 263.61717258062 Dec: -30.3930057630471 [deg; J2000]
{ 17h 34m 28.1s , -30d 23' 34.8" }
+/- 1.43150087143591 [arcmin] (estimated 90% radius based on SNR)
+/- 0.497502295928536 [arcmin] (formal 1-sigma fit error)
SNR: 18.2204428148029
Angular difference between Flight and Ground position is 0.646613 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 95.2199999690056 +/- 11.3929943305649
Measured from: 3.31199997663498
to: 98.5319999456406 [s; relative to TRIGTIME]
T50: 36.9199999570847 +/- 6.65994380017381
Measured from: 33.3600000143051
to: 70.2799999713898 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 45.6000000238419
to: 46.6000000238419 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.46399998664856
to: 106.276000022888 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.299889 0.181645 0.059958 -0.036683
0.061417 0.053192 0.044983 0.038504 [error]
Peak 0.037811 0.007300 0.007908 0.002469
0.005997 0.005065 0.004339 0.003525 [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 6.95e-07 1.04e-07 7.09e-09 5.15e-10 8.06e-07 8.06e-07 erg/cm2
Error 7.20e-08 2.22e-08 3.62e-09 4.55e-10 7.71e-08 7.71e-08 erg/cm2
Peak flux Power-law 3.91e-01 7.37e-02 6.75e-03 6.71e-04 4.72e-01 4.72e-01 ph/cm2/s
Error 9.93e-02 5.38e-02 1.37e-02 3.40e-03 1.31e-01 1.31e-01 ph/cm2/s
Fluence Cutoff-PL 7.25e-07 6.02e-08 2.78e-11 1.09e-18 7.86e-07 7.86e-07 erg/cm2
Error 7.97e-08 2.77e-08 4.52e-10 1.55e-13 7.92e-08 7.92e-08 erg/cm2
Peak flux Cutoff-PL 3.92e-01 6.95e-02 5.92e-03 5.43e-04 4.66e-01 4.68e-01 ph/cm2/s
Error 9.87e-02 5.54e-02 1.35e-02 2.98e-03 1.29e-01 1.32e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.873 0.428 - - 6.53e-05 2.71e-05 53.310 57
CPL -3.780 0.000 12.1 0.0 7.86e+03 0.00e+00 45.520 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.447 1.431 - - 5.13e-04 7.82e-04 66.880 57
CPL 1.882 0.000 0.9 0.0 7.74e-02 0.00e+00 67.940 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 112.740 -6.464 106.276
T90 95.220 3.312 98.532
T50 36.920 33.360 70.280
Peak 1.000 45.600 46.600
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
263.6172 -30.3930 0.0106 18.0139 -138.6833 1.8402425 18.220 TRIG_00569022
Foreground time interval of the image:
-6.464 73.101 (delta_t = 79.565 [sec])
Background time interval of the image:
-239.000 -6.464 (delta_t = 232.536 [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 -6.464 sec. to 106.276 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.87321 ( -0.421444 0.435111 )
Norm@50keV : 6.52787E-05 ( -2.2783e-05 3.14712e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.31 using 59 PHA bins.
# Reduced chi-squared = 0.9352 for 57 degrees of freedom
# Null hypothesis probability = 6.144295e-01
Photon flux (15-150 keV) in 112.7 sec: 0.236605 ( -0.0235135 0.0235472 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.061e-07 ( -7.71161e-08 7.71321e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.464 sec. to 106.276 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.78027 ( )
Epeak [keV] : 12.0704 ( )
Norm@50keV : 7858.23 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.52 using 59 PHA bins.
# Reduced chi-squared = 0.8128 for 56 degrees of freedom
# Null hypothesis probability = 8.403449e-01
Photon flux (15-150 keV) in 112.7 sec: 0.236138 ( -0.025321 0.025182 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.8562e-07 ( -7.94952e-08 7.8819e-08 ) ergs/cm2
Band function
Time interval is from -6.464 sec. to 106.276 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.24606 ( 6.12786 8.24606 )
beta : -5.92271 ( -0.398615 0.462318 )
Epeak [keV] : 465.457 ( -465.457 -465.457 )
Norm@50keV : 8.44548E-03 ( -0.00284541 0.0045553 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.34 using 59 PHA bins.
# Reduced chi-squared = 0.9699 for 55 degrees of freedom
# Null hypothesis probability = 5.381029e-01
Photon flux (15-150 keV) in 112.7 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] : 2.57060 (-0.193715 0.219757)
R^2/D10^2 : 96.1786 (-45.2255 83.881)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.24 using 59 PHA bins.
# Reduced chi-squared = 0.7937 for 57 degrees of freedom
# Null hypothesis probability = 8.695343e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.262e-07 1.691e-07
25- 50 5.966e-08 1.592e-08
50-150 2.467e-11 1.812e-11
15-150 7.859e-07 1.552e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.58056 (-0.507771 0.611408)
Norm : 76.2554 (-30.9142 52.4692)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.20 using 59 PHA bins.
# Reduced chi-squared = 0.8105 for 57 degrees of freedom
# Null hypothesis probability = 8.462220e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.199e-07 1.398e-07
25- 50 7.411e-08 2.178e-08
50-150 2.422e-10 1.713e-10
15-150 7.942e-07 1.283e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.55707 (-0.199212 0.220664)
R1^2/D10^2 : 99.7115 (-47.3535 518.379)
kT2 [keV] : 26.5657 (-26.6754 -26.6754)
R2^2/D10^2 : 8.72121E-05 (-8.55807e-05 0.00982313)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.75 using 59 PHA bins.
# Reduced chi-squared = 0.8136 for 55 degrees of freedom
# Null hypothesis probability = 8.366827e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.263e-07 1.769e-07
25- 50 6.516e-08 1.808e-08
50-150 3.529e-08 3.137e-08
15-150 8.267e-07 1.527e-07
Peak spectrum fit
Power-law model
Time interval is from 45.600 sec. to 46.600 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.44742 ( -1.20937 1.65347 )
Norm@50keV : 5.13138E-04 ( -0.000512655 0.00105082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.88 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 57 degrees of freedom
# Null hypothesis probability = 1.739885e-01
Photon flux (15-150 keV) in 1 sec: 0.472184 ( -0.131206 0.131052 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.593e-08 ( -5.38386e-09 6.57444e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 45.600 sec. to 46.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88243 ( )
Epeak [keV] : 0.902455 ( )
Norm@50keV : 7.74234E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.94 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 56 degrees of freedom
# Null hypothesis probability = 1.315815e-01
Photon flux (15-150 keV) in 1 sec: 0.465632 ( -0.125217 0.133751 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.60575e-08 ( -5.5231e-09 5.9759e-09 ) ergs/cm2
Band function
Time interval is from 45.600 sec. to 46.600 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.90308 ( 9.90308 9.90308 )
beta : -4.44814 ( -1.65364 1.20945 )
Epeak [keV] : 1.61462 ( -1.61462 -1.61462 )
Norm@50keV : 6.96922E-02 ( -0.0696783 0.142822 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.88 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 55 degrees of freedom
# Null hypothesis probability = 1.307557e-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] : 2.84537 (-0.768492 1.05841)
R^2/D10^2 : 89.3435 (-89.534 719.965)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.74 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 57 degrees of freedom
# Null hypothesis probability = 1.371178e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.193e-08 6.765e-09
25- 50 1.440e-09 9.495e-10
50-150 1.492e-12 1.821e-12
15-150 1.337e-08 7.460e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.14535 (-2.4988 5.25439)
Norm : 52.8842 (-52.9233 275.743)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.06 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.498919e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.176e-08 6.625e-09
25- 50 2.293e-09 1.477e-09
50-150 3.054e-11 3.434e-11
15-150 1.408e-08 8.125e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.72165 (-0.744196 0.98267)
R1^2/D10^2 : 116.426 (-98.7318 416.225)
kT2 [keV] : 56.0118 (-42.7209 -56.0118)
R2^2/D10^2 : 4.77696E-04 (-0.000458077 0.0269855)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.70 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 55 degrees of freedom
# Null hypothesis probability = 2.219806e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.173e-08 6.620e-09
25- 50 2.293e-09 1.184e-09
50-150 1.502e-08 9.740e-09
15-150 2.905e-08 1.550e-08
Plot creation:
Tue Sep 3 02:14:30 EDT 2013