batgrbproduct Analysis for Trigger=552336
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): Wed Apr 3 17:24:49 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger552336/batgroup_hand_proc
======================================================================
Trigger: 00552336 Segment: 000
BAT Trigger Time: 386302952 [s; MET]
Trigger Stop: 386303072 [s; MET]
UTC: 2013-03-30T02:22:21.619100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 276.103791301682 Dec: -24.8745863068089 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.86
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.86
Flight Position: [ source = BAT ]
RA: 276.103791301682 Dec: -24.8745863068089 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 276.094919933755 Dec: -24.8637855970273 [deg; J2000]
{ 18h 24m 22.8s , -24d 51' 49.6" }
+/- 3.45885832239872 [arcmin] (estimated 90% radius based on SNR)
+/- 1.31409084083798 [arcmin] (formal 1-sigma fit error)
SNR: 5.16671395190109
Angular difference between Flight and Ground position is 0.808192 arcmin
Partial Coding Fraction: 0.8671875 [ including projection effects ]
Duration
T90: 120 +/-
Measured from: 0
to: 120 [s; relative to TRIGTIME]
T50: 120 +/-
Measured from: 0
to: 120 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 120 second)
Measured from: 0
to: 120 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 120 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.320697 0.175208 0.139082 0.102683
0.072927 0.066512 0.055366 0.046624 [error]
Peak 0.320697 0.175208 0.139082 0.102683
0.072927 0.066512 0.055366 0.046624 [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 6.68e-08 9.10e-08 9.15e-08 1.67e-07 3.03e-07 4.16e-07 erg/cm2
Error 3.05e-08 3.02e-08 5.15e-08 2.23e-07 1.21e-07 2.58e-07 erg/cm2
Peak flux Power-law 1.81e-02 1.37e-02 6.87e-03 4.94e-03 4.10e-02 4.36e-02 ph/cm2/s
Error 8.43e-03 4.49e-03 3.73e-03 6.14e-03 1.34e-02 1.44e-02 ph/cm2/s
Fluence Cutoff-PL 8.59e-08 7.36e-08 3.73e-10 1.95e-17 2.96e-07 1.60e-07 erg/cm2
Error 3.41e-08 5.36e-08 6.73e-08 0.00e+00 2.79e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.81e-02 1.37e-02 6.86e-03 4.89e-03 4.09e-02 4.29e-02 ph/cm2/s
Error 8.51e-03 4.49e-03 5.37e-03 4.90e-03 1.35e-02 1.54e-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 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 1.992 0.649 - - 2.74e-04 1.15e-04 0.000 57
CPL -10.000 0.000 24.3 3.6 4.63e+05 1.25e+06 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.992 0.649 - - 2.74e-04 1.15e-04 0.000 57
CPL -10.000 0.000 24.3 3.6 4.63e+05 1.25e+06 0.000 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 120.000 0.000 120.000
T90 120.000 0.000 120.000
T50 120.000 0.000 120.000
Peak 120.000 0.000 120.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
276.0949 -24.8638 0.0371 22.4944 19.3431 0.7696717 5.167 TRIG_00552336
Foreground time interval of the image:
0.000 120.000 (delta_t = 120.000 [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 120.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99223 ( -0.613119 0.684394 )
Norm@50keV : 2.73987E-04 ( -0.000117513 0.000111687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.22 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.303178e-01
Photon flux (15-150 keV) in 120 sec: 4.09519E-02 ( -0.0134421 0.0134483 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03078e-07 ( -1.16041e-07 1.24997e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 24.2814 ( -3.19364 3.96108 )
Norm@50keV : 4.63381E+05 ( -463324 2.0341e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.202895e-01
Photon flux (15-150 keV) in 120 sec: 4.09423E-02 ( -0.0134715 0.0134397 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29484e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.66229 ( -3.69865 0.96907 )
Epeak [keV] : 24.6002 ( -10.9048 6.40899 )
Norm@50keV : 59.6030 ( -18.5456 1975.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.49 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.561056e-01
Photon flux (15-150 keV) in 120 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] : 6.78993 (-1.90855 3.92855)
R^2/D10^2 : 8.72770E-02 (-0.0872552 0.26868)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.46 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.861677e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.507e-08 4.606e-08
25- 50 9.684e-08 6.138e-08
50-150 1.436e-08 1.235e-08
15-150 1.863e-07 1.198e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.6871 (-37.3119 -58.7287)
Norm : 0.216302 (-0.0966744 0.231928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.235050e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.500e-08 3.771e-08
25- 50 9.825e-08 5.993e-08
50-150 1.097e-07 9.222e-08
15-150 2.730e-07 1.781e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.84289 (-1.88092 2.78462)
R1^2/D10^2 : 0.146103 (-0.116736 0.506273)
kT2 [keV] : 42.3854 (-40.9182 -42.4282)
R2^2/D10^2 : 8.59664E-05 (-8.46748e-05 0.00280916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.567884e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.877e-08 4.915e-08
25- 50 8.784e-08 5.092e-08
50-150 1.688e-07 9.798e-08
15-150 3.354e-07 1.634e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99223 ( -0.613119 0.684394 )
Norm@50keV : 2.73987E-04 ( -0.000117513 0.000111687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.22 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.303178e-01
Photon flux (15-150 keV) in 120 sec: 4.09519E-02 ( -0.0134421 0.0134483 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.03078e-07 ( -1.16041e-07 1.24997e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 24.2814 ( -3.19364 3.96108 )
Norm@50keV : 4.63381E+05 ( -463324 2.0341e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.202895e-01
Photon flux (15-150 keV) in 120 sec: 4.09423E-02 ( -0.0134715 0.0134397 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29484e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.66229 ( -3.69865 0.96907 )
Epeak [keV] : 24.6002 ( -10.8346 6.40947 )
Norm@50keV : 59.6030 ( -18.5456 1975.07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.49 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.561056e-01
Photon flux (15-150 keV) in 120 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] : 6.78993 (-1.90855 3.92855)
R^2/D10^2 : 8.72770E-02 (-0.0872552 0.26868)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.46 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.861677e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.507e-08 4.532e-08
25- 50 9.684e-08 6.300e-08
50-150 1.436e-08 1.231e-08
15-150 1.863e-07 1.138e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.6871 (-37.3119 -58.7287)
Norm : 0.216302 (-0.0966744 0.231928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.235050e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.500e-08 4.184e-08
25- 50 9.825e-08 6.258e-08
50-150 1.097e-07 8.562e-08
15-150 2.730e-07 1.805e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.84289 (-1.88092 2.78462)
R1^2/D10^2 : 0.146103 (-0.116736 0.506273)
kT2 [keV] : 42.3854 (-30.9866 -42.4282)
R2^2/D10^2 : 8.59664E-05 (-8.46748e-05 0.00280916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.567884e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.877e-08 4.959e-08
25- 50 8.784e-08 5.197e-08
50-150 1.688e-07 1.090e-07
15-150 3.354e-07 1.703e-07
Plot creation:
Wed Apr 3 17:51:46 EDT 2013