batgrbproduct Analysis for Trigger=556533
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): Sat May 25 03:23:51 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger556533/GCN5_download_cron
======================================================================
Trigger: 00556533 Segment: 000
BAT Trigger Time: 391061045.592 [s; MET]
Trigger Stop: 391061045.656 [s; MET]
UTC: 2013-05-24T04:03:55.001040 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 118.580165214582 Dec: -28.1344888419534 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.85
Image Trigger?: NO
Rate S/N Ratio: 9.16515138991168 [ if not an image trigger ]
Image S/N Ratio: 5.85
Flight Position: [ source = BAT ]
RA: 118.580165214582 Dec: -28.1344888419534 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 118.602870453884 Dec: -28.1418136801491 [deg; J2000]
{ 07h 54m 24.7s , -28d 08' 30.5" }
+/- 2.98103334664702 [arcmin] (estimated 90% radius based on SNR)
+/- 1.88178069561391 [arcmin] (formal 1-sigma fit error)
SNR: 6.3892734264666
Angular difference between Flight and Ground position is 1.279175 arcmin
Partial Coding Fraction: 0.2539062 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003711 0.005215 0.014660 0.014442
0.003787 0.003238 0.004113 0.004260 [error]
Peak 0.003711 0.005215 0.014660 0.014442
0.003787 0.003238 0.004113 0.004260 [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 1.03e-10 5.58e-10 2.61e-09 5.08e-08 8.15e-09 5.41e-08 erg/cm2
Error 2.11e-10 6.66e-10 2.39e-09 7.88e-08 6.79e-09 8.01e-08 erg/cm2
Peak flux Power-law 4.96e-02 1.44e-01 3.37e-01 2.15e+00 9.10e-01 2.70e+00 ph/cm2/s
Error 1.05e-01 1.76e-01 3.09e-01 3.03e+00 8.40e-01 3.24e+00 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 6.00e-04 7.15e-02 9.43e-01 5.58e-01 1.52e+00 1.57e+00 ph/cm2/s
Error 6.94e-03 1.05e-01 5.05e-01 7.82e-01 8.38e-01 0.00e+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 -0.206 0.609 - - 6.22e-03 6.36e-03 51.830 57
CPL -9.997 -2.062 100.7 27.2 2.92e+00 2.29e+00 45.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.206 0.609 - - 6.22e-03 6.36e-03 51.830 57
CPL -9.997 -2.062 100.7 27.2 2.92e+00 2.29e+00 45.070 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
118.6029 -28.1418 0.0299 49.0 -178.8 0.0467 6.4 TRIG_00556533
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-239.592 -5.592 (delta_t = 234.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.206187 ( 0.241748 1.46017 )
Norm@50keV : 6.22320E-03 ( -0.00619234 0.00653035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.83 using 59 PHA bins.
# Reduced chi-squared = 0.9093 for 57 degrees of freedom
# Null hypothesis probability = 6.687648e-01
Photon flux (15-150 keV) in 0.064 sec: 0.910225 ( -0.910225 0.769815 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.15142e-09 ( -6.78854e-09 6.78752e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99743 ( 9.99907 5.8754 )
Epeak [keV] : 100.705 ( -20.9743 33.4139 )
Norm@50keV : 2.92324 ( -2.90998 1.67201 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.07 using 59 PHA bins.
# Reduced chi-squared = 0.8049 for 56 degrees of freedom
# Null hypothesis probability = 8.518209e-01
Photon flux (15-150 keV) in 0.064 sec: 1.51612 ( -0.771655 0.79261 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.74221 -5 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 113.734 ( -27.5865 47.3655 )
Norm@50keV : 0.226457 ( -0.123072 0.622145 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.11 using 59 PHA bins.
# Reduced chi-squared = 0.8565 for 55 degrees of freedom
# Null hypothesis probability = 7.665140e-01
Photon flux (15-150 keV) in 0.064 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] : 48.7983 ( )
R^2/D10^2 : 5.78688E-03 (-0.00530307 0.0246769)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.8880 for 57 degrees of freedom
# Null hypothesis probability = 7.118680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.76 using 59 PHA bins.
# Reduced chi-squared = 0.9782 for 57 degrees of freedom
# Null hypothesis probability = 5.216836e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.00000 (-4 -4)
R1^2/D10^2 : 0.0 (0 0)
kT2 [keV] : 49.2169 (-26.646 -49.3457)
R2^2/D10^2 : 5.75119E-03 (-0.00557425 0.0241782)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.9202 for 55 degrees of freedom
# Null hypothesis probability = 6.428268e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.206187 ( 0.241748 1.46017 )
Norm@50keV : 6.22320E-03 ( -0.00619234 0.00653035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.83 using 59 PHA bins.
# Reduced chi-squared = 0.9093 for 57 degrees of freedom
# Null hypothesis probability = 6.687648e-01
Photon flux (15-150 keV) in 0.064 sec: 0.910225 ( -0.910225 0.769815 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.15142e-09 ( -6.78854e-09 6.78752e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99743 ( 9.99907 5.8754 )
Epeak [keV] : 100.705 ( -20.9743 33.4139 )
Norm@50keV : 2.92324 ( -2.90998 1.67203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.07 using 59 PHA bins.
# Reduced chi-squared = 0.8049 for 56 degrees of freedom
# Null hypothesis probability = 8.518209e-01
Photon flux (15-150 keV) in 0.064 sec: 1.51612 ( -0.771655 0.79261 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.74596 -5 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 113.734 ( -27.5865 47.3655 )
Norm@50keV : 0.226457 ( -0.123072 0.622145 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.11 using 59 PHA bins.
# Reduced chi-squared = 0.8565 for 55 degrees of freedom
# Null hypothesis probability = 7.665140e-01
Photon flux (15-150 keV) in 0.064 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] : 48.7983 ( )
R^2/D10^2 : 5.78688E-03 (-0.00530307 0.0246769)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.8880 for 57 degrees of freedom
# Null hypothesis probability = 7.118680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.00000 (-7 -7)
Norm : 0.0 (0 0)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.76 using 59 PHA bins.
# Reduced chi-squared = 0.9782 for 57 degrees of freedom
# Null hypothesis probability = 5.216836e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.00000 (-4 -4)
R1^2/D10^2 : 0.0 (0 0)
kT2 [keV] : 49.2169 (-26.6666 -49.3457)
R2^2/D10^2 : 5.75119E-03 (-0.00557425 0.0241782)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.9202 for 55 degrees of freedom
# Null hypothesis probability = 6.428268e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sat May 25 03:40:16 EDT 2013