batgrbproduct Analysis for Trigger=553930
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 Apr 20 11:56:57 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger553930/GCN5_download_cron
======================================================================
Trigger: 00553930 Segment: 000
BAT Trigger Time: 388085088 [s; MET]
Trigger Stop: 388085152 [s; MET]
UTC: 2013-04-19T17:24:37.540660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 203.650572425903 Dec: 37.2388595413565 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.99
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.99
Flight Position: [ source = BAT ]
RA: 203.650572425903 Dec: 37.2388595413565 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 203.598780238494 Dec: 37.2892906545766 [deg; J2000]
{ 13h 34m 23.7s , +37d 17' 21.4" }
+/- 6.20107158147715 [arcmin] (estimated 90% radius based on SNR)
+/- 4.67863470868222 [arcmin] (formal 1-sigma fit error)
SNR: 2.24400091949785
Angular difference between Flight and Ground position is 3.907977 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.219614 0.115482 0.015873 -0.003144
0.043544 0.044153 0.038995 0.035224 [error]
Peak 0.219614 0.115482 0.015873 -0.003144
0.043544 0.044153 0.038995 0.035224 [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 4.39e-08 5.04e-08 4.15e-08 5.74e-08 1.57e-07 1.92e-07 erg/cm2
Error 1.70e-08 1.93e-08 2.74e-08 7.98e-08 6.87e-08 1.15e-07 erg/cm2
Peak flux Power-law 2.25e-02 1.43e-02 5.91e-03 3.31e-03 4.44e-02 4.61e-02 ph/cm2/s
Error 8.85e-03 5.35e-03 3.78e-03 4.30e-03 1.53e-02 1.64e-02 ph/cm2/s
Fluence Cutoff-PL 4.23e-08 7.01e-08 2.19e-08 5.55e-10 1.35e-07 1.35e-07 erg/cm2
Error 1.95e-08 2.82e-08 3.04e-08 1.58e-08 5.59e-08 5.69e-08 erg/cm2
Peak flux Cutoff-PL 2.10e-02 2.00e-02 3.48e-03 4.87e-05 4.46e-02 4.46e-02 ph/cm2/s
Error 9.98e-03 7.72e-03 4.46e-03 1.09e-03 1.45e-02 1.45e-02 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 4.49e-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 2.267 0.627 - - 2.59e-04 1.30e-04 63.860 57
CPL -0.732 3.644 30.9 0.0 2.40e-02 0.00e+00 60.020 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.267 0.627 - - 2.59e-04 1.30e-04 63.860 57
CPL -0.732 3.644 30.9 0.0 2.40e-02 0.00e+00 60.020 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
203.5988 +37.2893 0.0856 15.3 -131.6 0.2183 2.2 TRIG_00553930
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26709 ( -0.564726 0.689237 )
Norm@50keV : 2.59006E-04 ( -0.00012825 0.000131873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.86 using 59 PHA bins.
# Reduced chi-squared = 1.120 for 57 degrees of freedom
# Null hypothesis probability = 2.482950e-01
Photon flux (15-150 keV) in 64 sec: 4.44025E-02 ( -0.0151998 0.0154259 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56604e-07 ( -6.44454e-08 7.29901e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.731554 ( -4.59289 2.69572 )
Epeak [keV] : 30.9464 ( )
Norm@50keV : 2.40475E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.02 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 56 degrees of freedom
# Null hypothesis probability = 3.321306e-01
Photon flux (15-150 keV) in 64 sec: 4.45637E-02 ( -0.0143906 0.0145956 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34569e-07 ( -5.04698e-08 6.12333e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98308 ( -6.81937 -4.98308 )
beta : -3.13580 ( 3.1358 1.00167 )
Epeak [keV] : 24.6625 ( -6.86092 7.47439 )
Norm@50keV : 68.9826 ( -21.7824 535.821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.81 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 55 degrees of freedom
# Null hypothesis probability = 3.053098e-01
Photon flux (15-150 keV) in 64 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] : 7.94275 (-2.27759 3.04187)
R^2/D10^2 : 5.69370E-02 (-0.0569328 0.159368)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.12 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.632896e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.135e-08 2.566e-08
25- 50 7.147e-08 4.253e-08
50-150 1.833e-08 1.481e-08
15-150 1.311e-07 7.894e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.6628 (-18.3806 51.211)
Norm : 0.320486 (-0.140335 0.263603)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.56 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 57 degrees of freedom
# Null hypothesis probability = 3.162069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.565e-08 2.781e-08
25- 50 5.775e-08 3.648e-08
50-150 4.050e-08 3.466e-08
15-150 1.439e-07 9.437e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.54056 (-5.54634 -5.54634)
R1^2/D10^2 : 0.103749 (-0.103828 -0.103828)
kT2 [keV] : 9.98849 (-10.0135 65.6846)
R2^2/D10^2 : 1.49327E-02 (-0.0147096 0.190364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 55 degrees of freedom
# Null hypothesis probability = 3.016693e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.335e-08 1.089e-07
25- 50 6.815e-08 2.767e-07
50-150 2.637e-08 1.638e-07
15-150 1.379e-07 4.605e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26709 ( -0.564726 0.689237 )
Norm@50keV : 2.59006E-04 ( -0.00012825 0.000131873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.86 using 59 PHA bins.
# Reduced chi-squared = 1.120 for 57 degrees of freedom
# Null hypothesis probability = 2.482950e-01
Photon flux (15-150 keV) in 64 sec: 4.44025E-02 ( -0.0151998 0.0154259 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56604e-07 ( -6.44454e-08 7.29901e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.731554 ( -4.59289 2.69572 )
Epeak [keV] : 30.9464 ( )
Norm@50keV : 2.40475E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.02 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 56 degrees of freedom
# Null hypothesis probability = 3.321306e-01
Photon flux (15-150 keV) in 64 sec: 4.45637E-02 ( -0.0143906 0.0145956 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34569e-07 ( -5.04698e-08 6.12333e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98308 ( -6.81995 -4.98308 )
beta : -3.13580 ( 3.1358 1.00167 )
Epeak [keV] : 24.6625 ( -6.86092 7.47439 )
Norm@50keV : 68.9826 ( -21.7824 535.821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.81 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 55 degrees of freedom
# Null hypothesis probability = 3.053098e-01
Photon flux (15-150 keV) in 64 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] : 7.94275 (-2.27759 3.04187)
R^2/D10^2 : 5.69370E-02 (-0.0569328 0.159368)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.12 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 57 degrees of freedom
# Null hypothesis probability = 3.632896e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.135e-08 2.510e-08
25- 50 7.147e-08 4.362e-08
50-150 1.833e-08 1.514e-08
15-150 1.311e-07 8.240e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.6628 (-18.3806 51.211)
Norm : 0.320486 (-0.140335 0.263603)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.56 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 57 degrees of freedom
# Null hypothesis probability = 3.162069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.565e-08 2.851e-08
25- 50 5.775e-08 3.526e-08
50-150 4.050e-08 3.488e-08
15-150 1.439e-07 9.549e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.54056 (-5.54634 -5.54634)
R1^2/D10^2 : 0.103749 (-0.103828 -0.103828)
kT2 [keV] : 9.98849 (-10.0135 65.6846)
R2^2/D10^2 : 1.49327E-02 (-0.0147096 0.190364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 55 degrees of freedom
# Null hypothesis probability = 3.016693e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.335e-08 8.653e-08
25- 50 6.815e-08 1.954e-07
50-150 2.637e-08 1.624e-07
15-150 1.379e-07 4.269e-07
Plot creation:
Sat Apr 20 12:18:10 EDT 2013