batgrbproduct Analysis for Trigger=555163
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 5 22:29:58 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger555163/batgroup_hand_proc
======================================================================
Trigger: 00555163 Segment: 000
BAT Trigger Time: 389434958.912 [s; MET]
Trigger Stop: 389434959.936 [s; MET]
UTC: 2013-05-05T08:22:28.392980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 137.059762477099 Dec: 17.4850913390281 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.59
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 6.59
Flight Position: [ source = BAT ]
RA: 137.059762477099 Dec: 17.4850913390281 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 137.060 Dec: 17.485 [deg; J2000]
{ 09h 08m 14s , +17d 29' 06" }
+/- 1.5 [arcmin] (estimated 90% radius based on SNR)
+/- 1.5 [arcmin] (formal 1-sigma fit error)
SNR: 15.124
Angular difference between Flight and Ground position is 0.014656 arcmin
Partial Coding Fraction: 0.02636719 [ including projection effects ]
Duration
T90: 88.4800000190735 +/- 116.258229523501
Measured from: -1.14399999380112
to: 87.3360000252724 [s; relative to TRIGTIME]
T50: 13.0080000758171 +/- 2.34524195796188
Measured from: 0.663999974727631
to: 13.6720000505447 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.43599998950958
to: 2.43599998950958 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.03200000524521
to: 363.255999982357 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.790068 7.793293 10.139503 4.472458
0.285032 0.332948 0.358888 0.324488 [error]
Peak 0.499789 0.907532 1.583195 0.974356
0.078601 0.102992 0.130382 0.125933 [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 1.98e-06 4.44e-06 7.84e-06 3.24e-05 2.14e-05 4.67e-05 erg/cm2
Error 1.73e-07 2.31e-07 3.44e-07 3.28e-06 8.95e-07 3.42e-06 erg/cm2
Peak flux Power-law 5.63e+00 8.50e+00 9.62e+00 2.07e+01 3.00e+01 4.45e+01 ph/cm2/s
Error 1.23e+00 1.16e+00 9.65e-01 4.41e+00 3.10e+00 4.88e+00 ph/cm2/s
Fluence Cutoff-PL 1.90e-06 4.46e-06 8.00e-06 2.77e-05 2.14e-05 4.21e-05 erg/cm2
Error 2.11e-07 2.39e-07 4.62e-07 7.35e-06 9.05e-07 7.06e-06 erg/cm2
Peak flux Cutoff-PL 4.67e+00 8.53e+00 1.04e+01 1.40e+01 2.95e+01 3.76e+01 ph/cm2/s
Error 1.76e+00 1.23e+00 1.50e+00 5.37e+00 3.14e+00 8.50e+00 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 1.180 0.072 - - 5.72e-03 2.39e-04 47.820 57
CPL 1.036 0.266 421.8 0.0 6.55e-03 1.61e-03 47.190 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 0.822 0.169 - - 2.61e-01 2.74e-02 56.770 57
CPL 0.284 0.771 210.1 0.0 4.22e-01 0.00e+00 55.460 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: 34.624000 sec.
T50 in the 50-300 keV band: 5.568000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 366.288 -3.032 363.256
T90 88.480 -1.144 87.336
T50 13.008 0.664 13.672
Peak 1.000 1.436 2.436
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
137.0598 17.4851 0.0000 59.4380 -175.8716 21.7601112 15.124 TRIG_00555163
Foreground time interval of the image:
-3.032 13.789 (delta_t = 16.821 [sec])
Background time interval of the image:
-239.912 -3.032 (delta_t = 236.880 [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 -3.032 sec. to 363.256 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17973 ( -0.0725565 0.0722211 )
Norm@50keV : 5.72355E-03 ( -0.000239117 0.000238133 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.82 using 59 PHA bins.
# Reduced chi-squared = 0.8390 for 57 degrees of freedom
# Null hypothesis probability = 8.015322e-01
Photon flux (15-150 keV) in 366.3 sec: 0.669973 ( -0.0300555 0.030206 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13939e-05 ( -8.94409e-07 8.9486e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.032 sec. to 363.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03611 ( -0.320514 0.2109 )
Epeak [keV] : 421.763 ( -421.752 -421.752 )
Norm@50keV : 6.55181E-03 ( -0.000978543 0.00223656 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.19 using 59 PHA bins.
# Reduced chi-squared = 0.8426 for 56 degrees of freedom
# Null hypothesis probability = 7.930299e-01
Photon flux (15-150 keV) in 366.3 sec: 0.664725 ( -0.03179 0.031267 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13581e-05 ( -9.06153e-07 9.03406e-07 ) ergs/cm2
Band function
Time interval is from -3.032 sec. to 363.256 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06373 ( 0.930863 0.930863 )
beta : -8.94635 ( -0.0722171 0.0725665 )
Epeak [keV] : 514.030 ( -206.28 -514.03 )
Norm@50keV : 6.37186E-03 ( -0.000257407 0.00117853 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.21 using 59 PHA bins.
# Reduced chi-squared = 0.8584 for 55 degrees of freedom
# Null hypothesis probability = 7.630597e-01
Photon flux (15-150 keV) in 366.3 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] : 22.1275 ( )
R^2/D10^2 : 2.27026E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 147.86 using 59 PHA bins.
# Reduced chi-squared = 2.5940 for 57 degrees of freedom
# Null hypothesis probability = 5.289157e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.515e-07 6.410e-08
25- 50 3.988e-06 2.619e-07
50-150 1.459e-05 8.626e-07
15-150 1.933e-05 9.414e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 2.88936 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 137.84 using 59 PHA bins.
# Reduced chi-squared = 2.4182 for 57 degrees of freedom
# Null hypothesis probability = 1.201072e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.635e-06 1.141e-07
25- 50 5.070e-06 2.344e-07
50-150 1.112e-05 5.201e-07
15-150 1.882e-05 8.846e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.63903 (-1.31621 2.34372)
R1^2/D10^2 : 1.16165 (-0.82867 2.65406)
kT2 [keV] : 28.0440 (-2.54045 4.54438)
R2^2/D10^2 : 9.48266E-03 (-0.00390586 0.00372344)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.83 using 59 PHA bins.
# Reduced chi-squared = 0.9969 for 55 degrees of freedom
# Null hypothesis probability = 4.810536e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.081e-06 6.181e-07
25- 50 4.088e-06 6.236e-07
50-150 1.527e-05 1.123e-06
15-150 2.143e-05 1.819e-06
Peak spectrum fit
Power-law model
Time interval is from 1.436 sec. to 2.436 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.821554 ( -0.171511 0.167229 )
Norm@50keV : 0.260774 ( -0.0275296 0.0271985 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.77 using 59 PHA bins.
# Reduced chi-squared = 0.9960 for 57 degrees of freedom
# Null hypothesis probability = 4.836047e-01
Photon flux (15-150 keV) in 1 sec: 29.9514 ( -3.09119 3.09895 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02011e-06 ( -3.10905e-07 3.11086e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.436 sec. to 2.436 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.283623 ( -0.933931 0.607192 )
Epeak [keV] : 210.122 ( )
Norm@50keV : 0.422105 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.46 using 59 PHA bins.
# Reduced chi-squared = 0.9904 for 56 degrees of freedom
# Null hypothesis probability = 4.950680e-01
Photon flux (15-150 keV) in 1 sec: 29.5499 ( -3.1333 3.1474 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.02879e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 1.436 sec. to 2.436 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.758140 ( 0.75814 0.75814 )
beta : -0.821565 ( -0.16721 0.171506 )
Epeak [keV] : 18.7910 ( -18.7909 -18.7909 )
Norm@50keV : 0.360784 ( -0.138106 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.77 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.088118e-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] : 26.7356 (-3.03959 3.73124)
R^2/D10^2 : 0.651928 (-0.212886 0.290683)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.35 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 57 degrees of freedom
# Null hypothesis probability = 2.917632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.803e-08 1.539e-08
25- 50 4.575e-07 6.855e-08
50-150 2.395e-06 3.555e-07
15-150 2.930e-06 3.455e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 119.059 (-12.8383 12.8377)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.42 using 59 PHA bins.
# Reduced chi-squared = 1.8671 for 57 degrees of freedom
# Null hypothesis probability = 7.896296e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.963e-07 1.653e-07
25- 50 5.701e-07 3.112e-07
50-150 1.250e-06 6.775e-07
15-150 2.117e-06 1.145e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.57933 (-1.17754 2.83066)
R1^2/D10^2 : 2039.29 (-2005.24 306663)
kT2 [keV] : 28.8246 (-3.66731 4.98681)
R2^2/D10^2 : 0.504348 (-0.194481 0.262945)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.47 using 59 PHA bins.
# Reduced chi-squared = 0.9359 for 55 degrees of freedom
# Null hypothesis probability = 6.101578e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.071e-07 9.483e-08
25- 50 4.191e-07 7.240e-08
50-150 2.426e-06 3.785e-07
15-150 3.052e-06 4.800e-07
Plot creation:
Mon May 6 10:04:31 EDT 2013