batgrbproduct Analysis for Trigger=558828
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): Mon Jun 24 08:44:32 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger558828/GCN5_download_cron
======================================================================
Trigger: 00558828 Segment: 000
BAT Trigger Time: 393669680 [s; MET]
Trigger Stop: 393670384 [s; MET]
UTC: 2013-06-23T08:41:09.292600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 256.00732398678 Dec: -37.8244635882764 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.86
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.86
Flight Position: [ source = BAT ]
RA: 256.00732398678 Dec: -37.8244635882764 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 255.970151261927 Dec: -37.8313447107374 [deg; J2000]
{ 17h 03m 52.8s , -37d 49' 52.8" }
+/- 3.46310582178962 [arcmin] (estimated 90% radius based on SNR)
+/- 2.25013815903606 [arcmin] (formal 1-sigma fit error)
SNR: 5.1576635105728
Angular difference between Flight and Ground position is 1.809400 arcmin
Partial Coding Fraction: 0.71875 [ including projection effects ]
Duration
T90: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
T50: 704 +/-
Measured from: 0
to: 704 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 704 second)
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 704 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.858008 1.451345 0.577621 -0.090663
0.198943 0.193439 0.165491 0.143752 [error]
Peak 1.858008 1.451345 0.577621 -0.090663
0.198943 0.193439 0.165491 0.143752 [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 5.82e-07 5.92e-07 4.23e-07 4.84e-07 1.79e-06 2.08e-06 erg/cm2
Error 9.48e-08 9.36e-08 1.32e-07 2.78e-07 3.13e-07 4.76e-07 erg/cm2
Peak flux Power-law 2.72e-02 1.54e-02 5.52e-03 2.60e-03 4.96e-02 5.08e-02 ph/cm2/s
Error 4.53e-03 2.36e-03 1.66e-03 1.40e-03 6.74e-03 7.00e-03 ph/cm2/s
Fluence Cutoff-PL 5.60e-07 6.72e-07 3.37e-07 6.02e-08 1.62e-06 1.63e-06 erg/cm2
Error 1.02e-07 1.23e-07 1.71e-07 1.99e-07 3.11e-07 3.76e-07 erg/cm2
Peak flux Cutoff-PL 2.59e-02 1.75e-02 4.59e-03 4.35e-04 4.84e-02 4.84e-02 ph/cm2/s
Error 4.90e-03 3.12e-03 2.16e-03 1.14e-03 6.71e-03 6.76e-03 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 4.84e-02 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 2.483 0.292 - - 2.55e-04 5.86e-05 51.320 57
CPL 1.253 1.190 21.3 0.0 1.57e-03 0.00e+00 47.820 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.483 0.292 - - 2.55e-04 5.86e-05 51.320 57
CPL 1.253 1.190 21.3 0.0 1.57e-03 0.00e+00 47.820 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 704.000 0.000 704.000
T90 704.000 0.000 704.000
T50 704.000 0.000 704.000
Peak 704.000 0.000 704.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
255.9702 -37.8313 0.0370 19.5 62.3 3.3397 5.2 TRIG_00558828
------------------------------------------
Foreground time interval of the image:
0.000 704.000 (delta_t = 704.000 [sec])
Background time interval of the image:
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 704.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48273 ( -0.275466 0.308813 )
Norm@50keV : 2.54932E-04 ( -5.8558e-05 5.8635e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.32 using 59 PHA bins.
# Reduced chi-squared = 0.9003 for 57 degrees of freedom
# Null hypothesis probability = 6.871678e-01
Photon flux (15-150 keV) in 704 sec: 4.95553E-02 ( -0.00674035 0.00674257 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.78644e-06 ( -3.05352e-07 3.20228e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 704.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25292 ( -1.63762 0.742228 )
Epeak [keV] : 21.3223 ( )
Norm@50keV : 1.56844E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.82 using 59 PHA bins.
# Reduced chi-squared = 0.8539 for 56 degrees of freedom
# Null hypothesis probability = 7.735561e-01
Photon flux (15-150 keV) in 704 sec: 4.83816E-02 ( -0.006685 0.0067282 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6199e-06 ( -2.89985e-07 3.3145e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 704.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.24802 ( -0.741777 1.49242 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 21.3631 ( -14.5311 10.4414 )
Norm@50keV : 1.58020E-03 ( -0.00158019 0.0184453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.82 using 59 PHA bins.
# Reduced chi-squared = 0.8694 for 55 degrees of freedom
# Null hypothesis probability = 7.430634e-01
Photon flux (15-150 keV) in 704 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] : 7.05349 (-1.03574 1.22897)
R^2/D10^2 : 9.13098E-02 (-0.0442763 0.0861304)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.17 using 59 PHA bins.
# Reduced chi-squared = 0.9504 for 57 degrees of freedom
# Null hypothesis probability = 5.817637e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.178e-07 1.186e-07
25- 50 7.196e-07 1.649e-07
50-150 1.226e-07 5.431e-08
15-150 1.360e-06 3.013e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.1231 (-8.90104 13.4365)
Norm : 0.379972 (-0.0937776 0.135704)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.83 using 59 PHA bins.
# Reduced chi-squared = 0.8392 for 57 degrees of freedom
# Null hypothesis probability = 8.012688e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.629e-07 9.705e-08
25- 50 6.672e-07 1.257e-07
50-150 3.989e-07 1.933e-07
15-150 1.629e-06 3.411e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.77522 (-1.88794 1.62706)
R1^2/D10^2 : 0.330092 (-0.219074 2.16291)
kT2 [keV] : 13.3437 (-10.5104 8.32394)
R2^2/D10^2 : 3.96210E-03 (-0.00351498 0.0281815)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.92 using 59 PHA bins.
# Reduced chi-squared = 0.8531 for 55 degrees of freedom
# Null hypothesis probability = 7.726071e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.737e-07 3.180e-07
25- 50 6.454e-07 3.301e-07
50-150 4.347e-07 2.781e-07
15-150 1.654e-06 8.473e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 704.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48273 ( -0.275466 0.308813 )
Norm@50keV : 2.54932E-04 ( -5.8558e-05 5.8635e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.32 using 59 PHA bins.
# Reduced chi-squared = 0.9003 for 57 degrees of freedom
# Null hypothesis probability = 6.871678e-01
Photon flux (15-150 keV) in 704 sec: 4.95553E-02 ( -0.00674035 0.00674257 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.78644e-06 ( -3.05352e-07 3.20228e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 704.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25292 ( -1.63762 0.742228 )
Epeak [keV] : 21.3223 ( )
Norm@50keV : 1.56844E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.82 using 59 PHA bins.
# Reduced chi-squared = 0.8539 for 56 degrees of freedom
# Null hypothesis probability = 7.735561e-01
Photon flux (15-150 keV) in 704 sec: 4.83816E-02 ( -0.006685 0.0067282 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6199e-06 ( -2.89985e-07 3.3145e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 704.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.24802 ( -0.741777 1.49242 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 21.3631 ( -14.531 10.4414 )
Norm@50keV : 1.58020E-03 ( -0.00158019 0.0184453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.82 using 59 PHA bins.
# Reduced chi-squared = 0.8694 for 55 degrees of freedom
# Null hypothesis probability = 7.430634e-01
Photon flux (15-150 keV) in 704 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] : 7.05349 (-1.03574 1.22897)
R^2/D10^2 : 9.13098E-02 (-0.0442763 0.0861304)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.17 using 59 PHA bins.
# Reduced chi-squared = 0.9504 for 57 degrees of freedom
# Null hypothesis probability = 5.817637e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.178e-07 1.225e-07
25- 50 7.196e-07 1.658e-07
50-150 1.226e-07 5.672e-08
15-150 1.360e-06 2.636e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 32.1231 (-8.90104 13.4365)
Norm : 0.379972 (-0.0937776 0.135704)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.83 using 59 PHA bins.
# Reduced chi-squared = 0.8392 for 57 degrees of freedom
# Null hypothesis probability = 8.012688e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.629e-07 9.420e-08
25- 50 6.672e-07 1.255e-07
50-150 3.989e-07 1.817e-07
15-150 1.629e-06 3.154e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.77522 (-1.88794 1.62706)
R1^2/D10^2 : 0.330092 (-0.219074 2.16291)
kT2 [keV] : 13.3437 (-10.5104 8.32394)
R2^2/D10^2 : 3.96210E-03 (-0.00351498 0.0281815)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.92 using 59 PHA bins.
# Reduced chi-squared = 0.8531 for 55 degrees of freedom
# Null hypothesis probability = 7.726071e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.737e-07 3.144e-07
25- 50 6.454e-07 3.234e-07
50-150 4.347e-07 2.790e-07
15-150 1.654e-06 8.705e-07
Plot creation:
Mon Jun 24 08:59:30 EDT 2013