batgrbproduct Analysis for Trigger=552380
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 13:19:42 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger552380/batgroup_hand_proc
======================================================================
Trigger: 00552380 Segment: 000
BAT Trigger Time: 386357832 [s; MET]
Trigger Stop: 386357896 [s; MET]
UTC: 2013-03-30T17:37:01.616700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.5884838122774 Dec: 21.4637415244399 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.88
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.88
Flight Position: [ source = BAT ]
RA: 83.5884838122774 Dec: 21.4637415244399 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.579826618083 Dec: 21.475578894412 [deg; J2000]
{ 05h 34m 19.2s , +21d 28' 32.1" }
+/- 1.70587785505921 [arcmin] (estimated 90% radius based on SNR)
+/- 0.870683042012456 [arcmin] (formal 1-sigma fit error)
SNR: 14.182872288249
Angular difference between Flight and Ground position is 0.859133 arcmin
Partial Coding Fraction: 0.3125 [ including projection effects ]
Duration
T90: 109.035999953747 +/- 26.3569424536146
Measured from: -35.244000017643
to: 73.7919999361038 [s; relative to TRIGTIME]
T50: 55.1479999423027 +/- 22.2341291192385
Measured from: -14.1439999938011
to: 41.0039999485016 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 51.8199999928474
to: 52.8199999928474 [s; relative to TRIGTIME]
Total Fluence
Measured from: -38.9959999918938
to: 95.4879999756813 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.997249 1.952967 0.745735 0.246122
0.126254 0.127241 0.115765 0.111131 [error]
Peak 0.050086 0.007084 0.025527 0.035097
0.010812 0.010650 0.010136 0.009031 [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 7.13e-07 8.23e-07 6.84e-07 9.55e-07 2.56e-06 3.17e-06 erg/cm2
Error 7.93e-08 6.75e-08 1.10e-07 2.99e-07 2.46e-07 4.29e-07 erg/cm2
Peak flux Power-law 3.35e-01 2.62e-01 1.35e-01 1.01e-01 7.82e-01 8.42e-01 ph/cm2/s
Error 2.93e-01 1.21e-01 1.28e-01 2.90e-01 2.74e-01 3.33e-01 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 4.17e-01 2.36e-01 8.58e-02 4.11e-02 1.03e-01 7.54e-01 ph/cm2/s
Error 2.59e-01 1.77e-01 1.27e-01 2.88e-01 3.37e-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 2.268 0.170 - - 2.01e-03 2.30e-04 0.000 57
CPL 1.862 0.445 13.5 0.0 3.49e-03 0.00e+00 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.891 1.656 - - 5.46e-03 3.53e-03 0.000 57
CPL 2.164 0.000 63.6 0.0 3.25e-03 0.00e+00 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 134.484 -38.996 95.488
T90 109.036 -35.244 73.792
T50 55.148 -14.144 41.004
Peak 1.000 51.820 52.820
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.5798 21.4756 0.0136 34.3014 47.6848 3.2896927 14.183 TRIG_00552380
Foreground time interval of the image:
-13.899 72.301 (delta_t = 86.200 [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 -38.996 sec. to 95.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26846 ( -0.165588 0.175019 )
Norm@50keV : 2.00641E-03 ( -0.000232338 0.000228191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.83 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 57 degrees of freedom
# Null hypothesis probability = 1.978435e-01
Photon flux (15-150 keV) in 134.5 sec: 0.344591 ( -0.027309 0.0273238 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56446e-06 ( -2.42887e-07 2.48115e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -38.996 sec. to 95.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86168 ( -0.744406 0.146221 )
Epeak [keV] : 13.5098 ( )
Norm@50keV : 3.49018E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 56 degrees of freedom
# Null hypothesis probability = 1.999689e-01
Photon flux (15-150 keV) in 134.5 sec: 0.337878 ( -0.028499 0.029133 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -38.996 sec. to 95.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.88225 ( -5.25092 1.93709 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 12.1240 ( -7.49421 19.6212 )
Norm@50keV : 3.39240E-03 ( -0.000872329 0.0062392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.66 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 55 degrees of freedom
# Null hypothesis probability = 1.749209e-01
Photon flux (15-150 keV) in 134.5 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] : 8.48518 (-0.826578 0.915179)
R^2/D10^2 : 0.284367 (-0.0953749 0.145764)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.00 using 59 PHA bins.
# Reduced chi-squared = 1.684 for 57 degrees of freedom
# Null hypothesis probability = 9.452526e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.184e-07 7.223e-08
25- 50 1.002e-06 1.090e-07
50-150 3.183e-07 8.601e-08
15-150 1.839e-06 1.849e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 44.9216 (-9.08887 12.7932)
Norm : 2.03678 (-0.301657 0.377202)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.14 using 59 PHA bins.
# Reduced chi-squared = 1.160 for 57 degrees of freedom
# Null hypothesis probability = 1.904643e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.519e-07 7.189e-08
25- 50 8.995e-07 8.400e-08
50-150 7.865e-07 2.046e-07
15-150 2.338e-06 2.677e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.97652 (-1.32004 1.29219)
R1^2/D10^2 : 1.78908 (-1.0396 3.02977)
kT2 [keV] : 16.1291 (-3.92631 6.67824)
R2^2/D10^2 : 1.52372E-02 (-0.0116533 0.0372122)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.84 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 55 degrees of freedom
# Null hypothesis probability = 1.502498e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.843e-07 2.376e-07
25- 50 8.369e-07 2.985e-07
50-150 8.651e-07 4.860e-07
15-150 2.386e-06 8.763e-07
Peak spectrum fit
Power-law model
Time interval is from 51.820 sec. to 52.820 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89113 ( -1.33181 1.97954 )
Norm@50keV : 5.46397E-03 ( -0.0043679 0.00268949 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.97 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.450941e-01
Photon flux (15-150 keV) in 1 sec: 0.781676 ( -0.273677 0.273674 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.90265e-08 ( -2.91388e-08 3.10671e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 51.820 sec. to 52.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16406 ( )
Epeak [keV] : 63.6459 ( )
Norm@50keV : 3.25169E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.51 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 56 degrees of freedom
# Null hypothesis probability = 2.561411e-01
Photon flux (15-150 keV) in 1 sec: 0.754226 ( -0.270053 0.305424 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.33073e-08 ( -3.37131e-08 1.87125e-08 ) ergs/cm2
Band function
Time interval is from 51.820 sec. to 52.820 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99887 ( 9.99887 9.99887 )
beta : -1.91142 ( -1.94556 1.3632 )
Epeak [keV] : 22.6465 ( -22.6465 -22.6465 )
Norm@50keV : 0.736489 ( -0.5842 0.375486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.97 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 55 degrees of freedom
# Null hypothesis probability = 1.906541e-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] : 3.92966 (-1.11716 1.5498)
R^2/D10^2 : 18.5353 (-18.5397 93.9698)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.61 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 57 degrees of freedom
# Null hypothesis probability = 2.030047e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.546e-08 8.980e-09
25- 50 5.305e-09 3.857e-09
50-150 5.787e-11 7.320e-11
15-150 2.082e-08 1.315e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.305 ( )
Norm : 2.97068 (-1.09502 1.09483)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.71 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 2.007019e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.438e-08 8.785e-09
25- 50 6.854e-09 4.679e-09
50-150 5.777e-10 6.885e-10
15-150 2.181e-08 1.374e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.71248 (-1.08355 1.3765)
R1^2/D10^2 : 23.4527 (-18.8893 138.617)
kT2 [keV] : 94.0536 (-61.6885 -93.8488)
R2^2/D10^2 : 5.96375E-04 (-0.000494932 0.00574622)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.76 using 59 PHA bins.
# Reduced chi-squared = 0.9410 for 55 degrees of freedom
# Null hypothesis probability = 5.993811e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.503e-08 8.660e-09
25- 50 6.981e-09 4.019e-09
50-150 5.182e-08 4.880e-08
15-150 7.383e-08 4.531e-08
Plot creation:
Wed Apr 3 13:45:07 EDT 2013