batgrbproduct Analysis for Trigger=557589
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 Jun 7 18:34:07 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557589/GCN5_download_cron
======================================================================
Trigger: 00557589 Segment: 000
BAT Trigger Time: 392245489.664 [s; MET]
Trigger Stop: 392245490.688 [s; MET]
UTC: 2013-06-06T21:04:39.020180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 249.403240279661 Dec: 29.7909669508947 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.14
Image Trigger?: NO
Rate S/N Ratio: 15.0996688705415 [ if not an image trigger ]
Image S/N Ratio: 8.14
Flight Position: [ source = BAT ]
RA: 249.403240279661 Dec: 29.7909669508947 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 249.389876749319 Dec: 29.7956977285804 [deg; J2000]
{ 16h 37m 33.6s , +29d 47' 44.5" }
+/- 2.00266205357038 [arcmin] (estimated 90% radius based on SNR)
+/- 0.719731153727395 [arcmin] (formal 1-sigma fit error)
SNR: 11.2784724122565
Angular difference between Flight and Ground position is 0.751498 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 276.576000034809 +/- 19.3109676637375
Measured from: 0.528000116348267
to: 277.104000151157 [s; relative to TRIGTIME]
T50: 57.0080000162125 +/- 12.4515187985018
Measured from: 105.808000147343
to: 162.816000163555 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 160.356000006199
to: 161.356000006199 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.34399998188019
to: 296.912000000477 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.322370 1.742493 1.296760 0.359367
0.101064 0.103767 0.092046 0.084442 [error]
Peak 0.066027 0.116491 0.114294 0.044767
0.006622 0.007963 0.007868 0.006121 [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 3.94e-07 7.13e-07 9.92e-07 2.88e-06 2.85e-06 4.98e-06 erg/cm2
Error 4.52e-08 4.93e-08 9.12e-08 5.72e-07 2.18e-07 6.42e-07 erg/cm2
Peak flux Power-law 5.87e-01 7.85e-01 7.72e-01 1.36e+00 2.59e+00 3.51e+00 ph/cm2/s
Error 8.42e-02 6.77e-02 6.14e-02 2.37e-01 1.86e-01 2.80e-01 ph/cm2/s
Fluence Cutoff-PL 3.80e-07 7.31e-07 1.00e-06 1.97e-06 2.79e-06 4.09e-06 erg/cm2
Error 5.26e-08 6.00e-08 9.59e-08 1.18e-06 2.45e-07 1.22e-06 erg/cm2
Peak flux Cutoff-PL 5.69e-01 7.91e-01 7.84e-01 1.20e+00 2.58e+00 3.34e+00 ph/cm2/s
Error 1.02e-01 7.18e-02 7.30e-02 4.25e-01 1.91e-01 4.60e-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 1.523 0.121 - - 1.01e-03 6.98e-05 51.640 57
CPL 1.292 0.395 149.2 0.0 1.33e-03 0.00e+00 50.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.024 0.126 - - 2.25e-02 1.59e-03 63.670 57
CPL 0.903 0.337 519.6 0.0 2.55e-02 1.17e-02 63.460 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: 162.944000 sec.
T50 in the 50-300 keV band: 55.872000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 298.256 -1.344 296.912
T90 276.576 0.528 277.104
T50 57.008 105.808 162.816
Peak 1.000 160.356 161.356
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
249.3899 +29.7957 0.0171 22.7 -158.8 0.5915 11.3 TRIG_00557589
------------------------------------------
Foreground time interval of the image:
-1.344 16.737 (delta_t = 18.081 [sec])
Background time interval of the image:
-190.763 -1.344 (delta_t = 189.419 [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 -1.344 sec. to 296.912 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52344 ( -0.120785 0.121574 )
Norm@50keV : 1.01112E-03 ( -7.00176e-05 6.96599e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.64 using 59 PHA bins.
# Reduced chi-squared = 0.9059 for 57 degrees of freedom
# Null hypothesis probability = 6.757784e-01
Photon flux (15-150 keV) in 298.3 sec: 0.127040 ( -0.00859336 0.00860249 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85067e-06 ( -2.16897e-07 2.18837e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.344 sec. to 296.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29187 ( -0.495543 0.294968 )
Epeak [keV] : 149.197 ( )
Norm@50keV : 1.33037E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.9085 for 56 degrees of freedom
# Null hypothesis probability = 6.687454e-01
Photon flux (15-150 keV) in 298.3 sec: 0.125510 ( -0.009089 0.00907 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79079e-06 ( -2.4803e-07 2.42682e-07 ) ergs/cm2
Band function
Time interval is from -1.344 sec. to 296.912 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.82317 ( -1.17883 -1.17883 )
beta : -1.57996 ( 1.58391 0.151101 )
Epeak [keV] : 25.2063 ( -28.9277 60.0057 )
Norm@50keV : 2.54274 ( -2.54273 56.598 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.9134 for 55 degrees of freedom
# Null hypothesis probability = 6.568059e-01
Photon flux (15-150 keV) in 298.3 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] : 14.5396 (-1.26012 1.40825)
R^2/D10^2 : 1.56488E-02 (-0.00433563 0.00592565)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 100.86 using 59 PHA bins.
# Reduced chi-squared = 1.7694 for 57 degrees of freedom
# Null hypothesis probability = 3.072113e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.076e-07 2.958e-08
25- 50 8.009e-07 7.592e-08
50-150 1.136e-06 1.639e-07
15-150 2.144e-06 1.863e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 0.517406 (-0.0342408 0.0342398)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.06 using 59 PHA bins.
# Reduced chi-squared = 0.8957 for 57 degrees of freedom
# Null hypothesis probability = 6.964135e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.844e-07 2.729e-08
25- 50 7.394e-07 6.503e-08
50-150 1.622e-06 3.921e-07
15-150 2.745e-06 4.737e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.18619 (-1.32856 1.70331)
R1^2/D10^2 : 0.198333 (-0.109933 0.288598)
kT2 [keV] : 23.7053 (-4.12469 7.53444)
R2^2/D10^2 : 2.31778E-03 (-0.00145006 0.00239164)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 55 degrees of freedom
# Null hypothesis probability = 6.182439e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.833e-07 1.188e-07
25- 50 7.171e-07 1.648e-07
50-150 1.638e-06 5.448e-07
15-150 2.739e-06 6.552e-07
Peak spectrum fit
Power-law model
Time interval is from 160.356 sec. to 161.356 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02359 ( -0.126417 0.125073 )
Norm@50keV : 2.24633E-02 ( -0.00158901 0.0015872 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.67 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 57 degrees of freedom
# Null hypothesis probability = 2.535007e-01
Photon flux (15-150 keV) in 1 sec: 2.58974 ( -0.18575 0.186129 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.409e-07 ( -1.91147e-08 1.92263e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 160.356 sec. to 161.356 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.902773 ( -0.493349 0.18114 )
Epeak [keV] : 519.627 ( -519.627 -519.627 )
Norm@50keV : 2.54635E-02 ( -0.00715605 0.0162219 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.46 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 56 degrees of freedom
# Null hypothesis probability = 2.300944e-01
Photon flux (15-150 keV) in 1 sec: 2.57754 ( -0.19124 0.19103 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39681e-07 ( -2.0019e-08 1.9859e-08 ) ergs/cm2
Band function
Time interval is from 160.356 sec. to 161.356 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.938273 ( 1.15587 6.15586 )
beta : -2.65614 ( 1.12032 11.1203 )
Epeak [keV] : 701.730 ( -701.73 -701.73 )
Norm@50keV : 2.45773E-02 ( -0.00172987 0.0215027 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.48 using 59 PHA bins.
# Reduced chi-squared = 1.154 for 55 degrees of freedom
# Null hypothesis probability = 2.023639e-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] : 21.8532 (-2.19898 2.52087)
R^2/D10^2 : 9.38163E-02 (-0.0268706 0.0368141)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.63 using 59 PHA bins.
# Reduced chi-squared = 1.7830 for 57 degrees of freedom
# Null hypothesis probability = 2.555240e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.317e-09 1.184e-09
25- 50 4.380e-08 4.735e-09
50-150 1.563e-07 1.945e-08
15-150 2.084e-07 1.965e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 10.3689 (-0.763431 0.763401)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.27 using 59 PHA bins.
# Reduced chi-squared = 1.9346 for 57 degrees of freedom
# Null hypothesis probability = 2.962514e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.582e-08 2.440e-09
25- 50 4.967e-08 1.093e-08
50-150 1.089e-07 4.411e-08
15-150 1.844e-07 4.946e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.64061 (-2.35664 2.66674)
R1^2/D10^2 : 0.972591 (-0.52017 1.66771)
kT2 [keV] : 37.0155 (-8.17507 18.4694)
R2^2/D10^2 : 1.57573E-02 (-0.0107641 0.0192222)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.57 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 55 degrees of freedom
# Null hypothesis probability = 2.000571e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.677e-08 6.292e-09
25- 50 4.713e-08 1.478e-08
50-150 1.789e-07 8.130e-08
15-150 2.428e-07 8.590e-08
Plot creation:
Fri Jun 7 18:49:55 EDT 2013