batgrbproduct Analysis for Trigger=555413
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): Thu May 9 09:55:35 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger555413/GCN5_download_cron
======================================================================
Trigger: 00555413 Segment: 000
BAT Trigger Time: 389725744 [s; MET]
Trigger Stop: 389725808 [s; MET]
UTC: 2013-05-08T17:08:53.468120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 305.312531851058 Dec: 34.9494108084652 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.58
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.58
Flight Position: [ source = BAT ]
RA: 305.312531851058 Dec: 34.9494108084652 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 305.352915013202 Dec: 34.9684549098811 [deg; J2000]
{ 20h 21m 24.7s , +34d 58' 06.4" }
+/- 1.8557171884548 [arcmin] (estimated 90% radius based on SNR)
+/- 0.830406776471952 [arcmin] (formal 1-sigma fit error)
SNR: 12.5756403352763
Angular difference between Flight and Ground position is 2.291072 arcmin
Partial Coding Fraction: 0.609375 [ including projection effects ]
Duration
T90: 42.2319999337196 +/- 9.26060907087535
Measured from: 11.0040001273155
to: 53.2360000610352 [s; relative to TRIGTIME]
T50: 21.8959999084473 +/- 5.08790605720503
Measured from: 14.9240001440048
to: 36.8200000524521 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.0680000185966
to: 12.0680000185966 [s; relative to TRIGTIME]
Total Fluence
Measured from: 9.62000000476837
to: 56.7519999742508 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.403288 0.485396 0.248719 0.051056
0.050679 0.052617 0.046863 0.044164 [error]
Peak 0.021091 0.031951 0.026765 0.011793
0.007401 0.007735 0.006923 0.006756 [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 1.22e-07 1.87e-07 2.14e-07 4.68e-07 6.62e-07 9.91e-07 erg/cm2
Error 2.22e-08 2.36e-08 4.48e-08 1.97e-07 1.04e-07 2.43e-07 erg/cm2
Peak flux Power-law 1.76e-01 2.09e-01 1.79e-01 2.60e-01 6.55e-01 8.23e-01 ph/cm2/s
Error 9.01e-02 6.44e-02 5.57e-02 1.84e-01 1.76e-01 2.31e-01 ph/cm2/s
Fluence Cutoff-PL 1.18e-07 1.98e-07 2.08e-07 1.99e-07 6.24e-07 7.24e-07 erg/cm2
Error 2.42e-08 3.35e-08 5.26e-08 3.27e-07 1.27e-07 3.51e-07 erg/cm2
Peak flux Cutoff-PL 1.78e-01 2.10e-01 1.78e-01 2.55e-01 6.57e-01 8.21e-01 ph/cm2/s
Error 9.05e-02 6.65e-02 5.68e-02 2.63e-01 1.76e-01 2.99e-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 1.804 0.233 - - 1.53e-03 2.33e-04 48.280 57
CPL 1.350 1.033 58.9 0.0 2.82e-03 0.00e+00 47.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.225 0.498 - - 5.56e-03 1.45e-03 39.160 57
CPL 1.221 0.501 9999.3 0.0 5.59e-03 1.56e-02 39.160 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: 7.808000 sec.
T50 in the 50-300 keV band: 4.480000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 47.132 9.620 56.752
T90 42.232 11.004 53.236
T50 21.896 14.924 36.820
Peak 1.000 11.068 12.068
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
305.3529 +34.9685 0.0153 21.0 85.9 1.3859 12.6 TRIG_00555413
------------------------------------------
Foreground time interval of the image:
9.620 56.752 (delta_t = 47.132 [sec])
Background time interval of the image:
-239.000 9.620 (delta_t = 248.620 [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 9.620 sec. to 56.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80436 ( -0.227076 0.238157 )
Norm@50keV : 1.52591E-03 ( -0.000236193 0.000230382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.28 using 59 PHA bins.
# Reduced chi-squared = 0.8470 for 57 degrees of freedom
# Null hypothesis probability = 7.878727e-01
Photon flux (15-150 keV) in 47.13 sec: 0.210624 ( -0.0265438 0.0265446 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.61964e-07 ( -1.02459e-07 1.05424e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.620 sec. to 56.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34959 ( -1.26184 0.803783 )
Epeak [keV] : 58.9119 ( )
Norm@50keV : 2.81810E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.66 using 59 PHA bins.
# Reduced chi-squared = 0.8511 for 56 degrees of freedom
# Null hypothesis probability = 7.783849e-01
Photon flux (15-150 keV) in 47.13 sec: 0.206833 ( -0.027805 0.027723 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.24232e-07 ( -1.24927e-07 1.29956e-07 ) ergs/cm2
Band function
Time interval is from 9.620 sec. to 56.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.38290 ( -1.39541 -1.39541 )
beta : -1.98434 ( -4.36128 0.334745 )
Epeak [keV] : 27.7414 ( -27.6649 50.4495 )
Norm@50keV : 0.329344 ( -0.359753 113.572 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.73 using 59 PHA bins.
# Reduced chi-squared = 0.8497 for 55 degrees of freedom
# Null hypothesis probability = 7.785404e-01
Photon flux (15-150 keV) in 47.13 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] : 10.3740 (-1.44086 1.71206)
R^2/D10^2 : 8.69476E-02 (-0.037945 0.0654691)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.61 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.526282e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.085e-08 1.897e-08
25- 50 2.377e-07 4.484e-08
50-150 1.378e-07 4.393e-08
15-150 4.664e-07 8.005e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 90.2416 (-33.1421 77.4799)
Norm : 0.957297 (-0.160825 0.208529)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.63 using 59 PHA bins.
# Reduced chi-squared = 0.8356 for 57 degrees of freedom
# Null hypothesis probability = 8.071912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.177e-07 2.010e-08
25- 50 1.992e-07 3.311e-08
50-150 3.039e-07 1.566e-07
15-150 6.209e-07 1.811e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.92006 (-3.91966 2.24419)
R1^2/D10^2 : 0.198590 (-0.111337 1.51517)
kT2 [keV] : 37.6601 (-24.8017 -37.9398)
R2^2/D10^2 : 5.45709E-04 (-0.000520571 0.0271035)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.56 using 59 PHA bins.
# Reduced chi-squared = 0.8648 for 55 degrees of freedom
# Null hypothesis probability = 7.515935e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.103e-07 4.424e-08
25- 50 2.141e-07 8.580e-08
50-150 3.373e-07 1.935e-07
15-150 6.617e-07 2.604e-07
Peak spectrum fit
Power-law model
Time interval is from 11.068 sec. to 12.068 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22537 ( -0.515733 0.479801 )
Norm@50keV : 5.56372E-03 ( -0.0014519 0.00145176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.16 using 59 PHA bins.
# Reduced chi-squared = 0.6869 for 57 degrees of freedom
# Null hypothesis probability = 9.658062e-01
Photon flux (15-150 keV) in 1 sec: 0.655495 ( -0.175553 0.17638 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.60506e-08 ( -1.63308e-08 1.67603e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.068 sec. to 12.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22134 ( -0.518897 0.482714 )
Epeak [keV] : 9999.26 ( -9999.35 -9999.35 )
Norm@50keV : 5.58896E-03 ( -0.00146091 0.0296513 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.16 using 59 PHA bins.
# Reduced chi-squared = 0.6993 for 56 degrees of freedom
# Null hypothesis probability = 9.574359e-01
Photon flux (15-150 keV) in 1 sec: 0.656645 ( -0.176588 0.174865 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.57619e-08 ( -1.68344e-08 1.67934e-08 ) ergs/cm2
Band function
Time interval is from 11.068 sec. to 12.068 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.94704 -4.94704 )
beta : -1.33730 ( -0.756957 0.580751 )
Epeak [keV] : 26.1029 ( -26.1029 65.0324 )
Norm@50keV : 373.028 ( -96.7299 2.78739e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.73 using 59 PHA bins.
# Reduced chi-squared = 0.7042 for 55 degrees of freedom
# Null hypothesis probability = 9.527414e-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] : 17.4700 (-6.04693 11.0894)
R^2/D10^2 : 4.47025E-02 (-0.044181 0.14303)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.05 using 59 PHA bins.
# Reduced chi-squared = 0.7729 for 57 degrees of freedom
# Null hypothesis probability = 8.952931e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.757e-09 1.639e-09
25- 50 1.246e-08 7.490e-09
50-150 2.739e-08 1.770e-08
15-150 4.261e-08 2.373e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-104.95 -199.362)
Norm : 2.70206 (-0.717053 0.718974)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.59 using 59 PHA bins.
# Reduced chi-squared = 0.7120 for 57 degrees of freedom
# Null hypothesis probability = 9.507294e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.728e-09 4.052e-09
25- 50 1.294e-08 7.785e-09
50-150 2.839e-08 1.690e-08
15-150 4.806e-08 2.904e-08
Double BB
R1^2/D10^2 : 0.273036 ( )
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 1.29842E-04 (-6.47058e-05 0.000787928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.79 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.38 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.34 using 59 PHA bins.
# Reduced chi-squared = 0.7053 for 55 degrees of freedom
# Reduced chi-squared = 0.6978 for 55 degrees of freedom
# Reduced chi-squared = 0.6971 for 55 degrees of freedom
# Null hypothesis probability = 9.520389e-01
# Null hypothesis probability = 9.567964e-01
# Null hypothesis probability = 9.572329e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.868e-09 3.553e-09
25- 50 1.201e-08 7.020e-09
50-150 3.692e-08 2.344e-08
15-150 5.480e-08 3.055e-08
Plot creation:
Thu May 9 10:27:24 EDT 2013