batgrbproduct Analysis for Trigger=559075
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 Jun 27 11:07:41 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger559075/batgroup_hand_proc
======================================================================
Trigger: 00559075 Segment: 000
BAT Trigger Time: 393936674.496 [s; MET]
Trigger Stop: 393936674.56 [s; MET]
UTC: 2013-06-26T10:51:03.776680 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 273.130048097431 Dec: -9.5308586993301 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.33
Image Trigger?: NO
Rate S/N Ratio: 26 [ if not an image trigger ]
Image S/N Ratio: 9.33
Flight Position: [ source = BAT ]
RA: 273.130048097431 Dec: -9.5308586993301 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 273.127552047332 Dec: -9.52498170277618 [deg; J2000]
{ 18h 12m 30.6s , -09d 31' 29.9" }
+/- 1.75903672092256 [arcmin] (estimated 90% radius based on SNR)
+/- 0.631150223343429 [arcmin] (formal 1-sigma fit error)
SNR: 13.5745567524287
Angular difference between Flight and Ground position is 0.382302 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.163999974727631 +/- 0.026832816796251
Measured from: -0.00400000810623169
to: 0.159999966621399 [s; relative to TRIGTIME]
T50: 0.0879999995231628 +/- 0.0291204412600908
Measured from: 0.0199999809265137
to: 0.107999980449677 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.413999974727631
to: 0.586000025272369 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0119999647140503
to: 0.180000007152557 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.022420 0.033199 0.032466 0.004804
0.004020 0.003881 0.003584 0.002619 [error]
Peak 0.029584 0.036114 0.042250 0.007690
0.007593 0.006984 0.005826 0.004789 [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 6.05e-09 1.26e-08 2.04e-08 7.44e-08 5.64e-08 1.13e-07 erg/cm2
Error 1.34e-09 1.74e-09 3.22e-09 2.49e-08 8.10e-09 2.73e-08 erg/cm2
Peak flux Power-law 2.47e-01 2.77e-01 2.22e-01 2.95e-01 8.54e-01 1.04e+00 ph/cm2/s
Error 8.43e-02 5.76e-02 4.65e-02 1.32e-01 1.59e-01 1.90e-01 ph/cm2/s
Fluence Cutoff-PL 4.04e-09 1.43e-08 2.34e-08 1.40e-08 5.16e-08 5.58e-08 erg/cm2
Error 1.77e-09 2.21e-09 4.12e-09 1.46e-08 8.43e-09 1.62e-08 erg/cm2
Peak flux Cutoff-PL 2.11e-01 2.86e-01 2.37e-01 1.68e-01 8.26e-01 9.02e-01 ph/cm2/s
Error 1.10e-01 6.41e-02 5.77e-02 1.77e-01 1.71e-01 2.60e-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 1.301 0.210 - - 2.97e-02 3.84e-03 62.400 57
CPL -0.526 1.386 74.5 25.6 2.11e-01 5.13e-01 54.400 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 1.320 0.318 - - 7.13e-03 1.27e-03 41.010 57
CPL 0.693 1.324 115.8 0.0 1.38e-02 3.38e-02 40.360 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.192 -0.012 0.180
T90 0.164 -0.004 0.160
T50 0.088 0.020 0.108
Peak 1.000 -0.414 0.586
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
273.1276 -9.5250 0.0142 14.5596 -147.7482 0.0975726 13.575 TRIG_00559075
Foreground time interval of the image:
-0.012 0.180 (delta_t = 0.192 [sec])
Background time interval of the image:
-119.496 -110.851 (delta_t = 8.645 [sec])
-60.496 -0.012 (delta_t = 60.484 [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 -0.012 sec. to 0.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30105 ( -0.209428 0.210483 )
Norm@50keV : 2.97342E-02 ( -0.00384249 0.00383748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.40 using 59 PHA bins.
# Reduced chi-squared = 1.095 for 57 degrees of freedom
# Null hypothesis probability = 2.903726e-01
Photon flux (15-150 keV) in 0.192 sec: 3.54807 ( -0.463289 0.464092 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.63992e-08 ( -8.05538e-09 8.14554e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.012 sec. to 0.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.525652 ( -1.59895 1.17395 )
Epeak [keV] : 74.4938 ( -12.7982 38.3104 )
Norm@50keV : 0.210909 ( -0.210972 0.815223 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9715 for 56 degrees of freedom
# Null hypothesis probability = 5.355773e-01
Photon flux (15-150 keV) in 0.192 sec: 3.28987 ( -0.49786 0.49591 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.15676e-08 ( -8.25101e-09 8.61619e-09 ) ergs/cm2
Band function
Time interval is from -0.012 sec. to 0.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.523163 ( -0.776506 1.26256 )
beta : -10.00000 ( 10 3.96618e-06 )
Epeak [keV] : 74.4896 ( -11.158 38.2573 )
Norm@50keV : 0.210519 ( -0.0263916 0.804865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.40 using 59 PHA bins.
# Reduced chi-squared = 0.9891 for 55 degrees of freedom
# Null hypothesis probability = 4.974207e-01
Photon flux (15-150 keV) in 0.192 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] : 17.5691 (-2.13323 2.50486)
R^2/D10^2 : 0.261844 (-0.0960295 0.144354)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 0.9651 for 57 degrees of freedom
# Null hypothesis probability = 5.500250e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.131e-09 7.853e-10
25- 50 1.421e-08 2.640e-09
50-150 3.164e-08 7.622e-09
15-150 4.898e-08 8.592e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 14.7046 (-1.89721 1.89708)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.92 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.466272e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.030e-09 3.987e-09
25- 50 1.352e-08 7.445e-09
50-150 2.966e-08 1.649e-08
15-150 5.022e-08 2.809e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.99309 (-2.12733 3.95583)
R1^2/D10^2 : 63.9681 (-62.0754 1026.69)
kT2 [keV] : 18.6819 (-2.51218 3.24886)
R2^2/D10^2 : 0.204972 (-0.0903478 0.119251)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.94 using 59 PHA bins.
# Reduced chi-squared = 0.9261 for 55 degrees of freedom
# Null hypothesis probability = 6.305873e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.979e-09 1.976e-09
25- 50 1.324e-08 3.551e-09
50-150 3.299e-08 9.550e-09
15-150 5.121e-08 1.234e-08
Peak spectrum fit
Power-law model
Time interval is from -0.414 sec. to 0.586 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31982 ( -0.319369 0.315747 )
Norm@50keV : 7.12849E-03 ( -0.0012737 0.00127298 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.01 using 59 PHA bins.
# Reduced chi-squared = 0.7195 for 57 degrees of freedom
# Null hypothesis probability = 9.454373e-01
Photon flux (15-150 keV) in 1 sec: 0.853628 ( -0.158864 0.159793 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.0108e-08 ( -1.36023e-08 1.37613e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.414 sec. to 0.586 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.692744 ( -1.74888 0.899481 )
Epeak [keV] : 115.850 ( -115.838 -115.838 )
Norm@50keV : 1.37898E-02 ( -0.00773504 0.0597859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.36 using 59 PHA bins.
# Reduced chi-squared = 0.7206 for 56 degrees of freedom
# Null hypothesis probability = 9.428612e-01
Photon flux (15-150 keV) in 1 sec: 0.826006 ( -0.171796 0.169802 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.79128e-08 ( -1.43347e-08 1.45438e-08 ) ergs/cm2
Band function
Time interval is from -0.414 sec. to 0.586 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.704485 ( -0.56412 0.78577 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 116.155 ( -45.5517 -116.155 )
Norm@50keV : 1.36852E-02 ( -0.00762645 0.059861 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.36 using 59 PHA bins.
# Reduced chi-squared = 0.7337 for 55 degrees of freedom
# Null hypothesis probability = 9.303939e-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] : 19.0888 (-3.5555 4.65073)
R^2/D10^2 : 4.50451E-02 (-0.0235061 0.0456029)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.73 using 59 PHA bins.
# Reduced chi-squared = 0.7672 for 57 degrees of freedom
# Null hypothesis probability = 9.017096e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.221e-09 1.161e-09
25- 50 1.554e-08 5.793e-09
50-150 4.166e-08 1.397e-08
15-150 6.042e-08 1.852e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.56610 (-0.641824 0.64175)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.31 using 59 PHA bins.
# Reduced chi-squared = 0.7424 for 57 degrees of freedom
# Null hypothesis probability = 9.266540e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.881e-09 5.170e-09
25- 50 1.708e-08 9.715e-09
50-150 3.747e-08 2.142e-08
15-150 6.343e-08 3.634e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.49575 (-2.70633 4.04619)
R1^2/D10^2 : 3.64231 (-3.45628 25.2919)
kT2 [keV] : 22.5085 (-4.92527 8.63453)
R2^2/D10^2 : 2.37866E-02 (-0.0161223 0.0329835)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.07 using 59 PHA bins.
# Reduced chi-squared = 0.6922 for 55 degrees of freedom
# Null hypothesis probability = 9.601422e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.882e-09 4.733e-09
25- 50 1.465e-08 7.841e-09
50-150 4.484e-08 2.619e-08
15-150 6.737e-08 3.044e-08
Plot creation:
Thu Jun 27 11:30:35 EDT 2013