batgrbproduct Analysis for Trigger=592544
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): Thu Mar 20 17:45:54 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger592544/GCN5_download_cron
======================================================================
Trigger: 00592544 Segment: 000
BAT Trigger Time: 416974377.728 [s; MET]
Trigger Stop: 416974377.984 [s; MET]
UTC: 2014-03-20T02:12:45.946760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 281.856830560698 Dec: -11.172835071369 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.8
Image Trigger?: NO
Rate S/N Ratio: 19.5959179422654 [ if not an image trigger ]
Image S/N Ratio: 6.8
Flight Position: [ source = BAT ]
RA: 281.856830560698 Dec: -11.172835071369 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 281.843429099677 Dec: -11.1884646114826 [deg; J2000]
{ 18h 47m 22.4s , -11d 11' 18.5" }
+/- 2.43036970542057 [arcmin] (estimated 90% radius based on SNR)
+/- 1.25269695804102 [arcmin] (formal 1-sigma fit error)
SNR: 8.5537763309799
Angular difference between Flight and Ground position is 1.225424 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 0.451999962329865 +/- 0.0716938014300129
Measured from: -0.0479998588562012
to: 0.404000103473663 [s; relative to TRIGTIME]
T50: 0.247999966144562 +/- 0.105603056882199
Measured from: 0.0280001163482666
to: 0.276000082492828 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.319999992847443
to: 0.680000007152557 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0759999752044678
to: 0.435999989509583 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.020245 0.020481 0.030905 0.009885
0.004753 0.004711 0.004400 0.003634 [error]
Peak 0.022404 0.021128 0.030520 0.006732
0.006577 0.006337 0.005613 0.004737 [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 4.93e-09 1.06e-08 1.80e-08 7.00e-08 4.94e-08 1.04e-07 erg/cm2
Error 1.85e-09 2.32e-09 4.11e-09 3.79e-08 1.03e-08 4.01e-08 erg/cm2
Peak flux Power-law 1.94e-01 2.07e-01 1.57e-01 1.94e-01 6.32e-01 7.52e-01 ph/cm2/s
Error 8.83e-02 5.55e-02 4.66e-02 1.28e-01 1.54e-01 1.81e-01 ph/cm2/s
Fluence Cutoff-PL 4.97e-09 1.07e-08 1.80e-08 6.90e-08 4.93e-08 1.03e-07 erg/cm2
Error 2.58e-09 2.35e-09 4.38e-09 4.63e-08 1.02e-08 5.49e-08 erg/cm2
Peak flux Cutoff-PL 1.96e-01 2.08e-01 1.56e-01 1.91e-01 6.33e-01 7.50e-01 ph/cm2/s
Error 1.43e-01 4.25e-02 4.98e-02 1.71e-01 1.56e-01 2.08e-01 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 1.240 0.359 - - 9.62e-03 1.79e-03 74.940 57
CPL 2.410 0.000 137.5 0.0 2.28e-03 0.00e+00 74.900 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.400 0.462 - - 5.19e-03 1.23e-03 59.120 57
CPL 1.410 0.733 9999.4 0.0 5.18e-03 9.97e-03 59.120 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: 0.384000 sec.
T50 in the 50-300 keV band: 0.128000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.512 -0.076 0.436
T90 0.452 -0.048 0.404
T50 0.248 0.028 0.276
Peak 1.000 -0.320 0.680
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
281.8434 -11.1885 0.0226 26.8 -172.9 0.0790 8.6 TRIG_00592544
------------------------------------------
Foreground time interval of the image:
-0.076 0.436 (delta_t = 0.512 [sec])
Background time interval of the image:
-239.728 -57.660 (delta_t = 182.068 [sec])
-56.728 -0.076 (delta_t = 56.652 [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 -0.076 sec. to 0.436 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23954 ( -0.359583 0.357419 )
Norm@50keV : 9.61771E-03 ( -0.00179002 0.00178999 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.94 using 59 PHA bins.
# Reduced chi-squared = 1.315 for 57 degrees of freedom
# Null hypothesis probability = 5.570335e-02
Photon flux (15-150 keV) in 0.512 sec: 1.13561 ( -0.220355 0.221411 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.94192e-08 ( -1.02145e-08 1.03216e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.076 sec. to 0.436 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.41030 ( )
Epeak [keV] : 137.481 ( )
Norm@50keV : 2.27616E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.90 using 59 PHA bins.
# Reduced chi-squared = 1.338 for 56 degrees of freedom
# Null hypothesis probability = 4.659067e-02
Photon flux (15-150 keV) in 0.512 sec: 1.13700 ( -0.223361 0.21931 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.92907e-08 ( -1.00713e-08 1.03988e-08 ) ergs/cm2
Band function
Time interval is from -0.076 sec. to 0.436 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23508 ( -0.406832 0.405416 )
beta : -9.37162 ( 5.95203 9.37162 )
Epeak [keV] : 1.00000E+04 ( 0 -10000 )
Norm@50keV : 9.65999E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.95 using 59 PHA bins.
# Reduced chi-squared = 1.363 for 55 degrees of freedom
# Null hypothesis probability = 3.812753e-02
Photon flux (15-150 keV) in 0.512 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] : 23.2676 (-5.09679 7.00787)
R^2/D10^2 : 3.17047E-02 (-0.0177445 0.0379597)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.66 using 59 PHA bins.
# Reduced chi-squared = 1.433 for 57 degrees of freedom
# Null hypothesis probability = 1.776163e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.584e-09 6.884e-10
25- 50 8.648e-09 2.899e-09
50-150 3.496e-08 1.316e-08
15-150 4.519e-08 1.596e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 4.70935 (-0.89426 0.894164)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.94 using 59 PHA bins.
# Reduced chi-squared = 1.367 for 57 degrees of freedom
# Null hypothesis probability = 3.415573e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.004e-09 3.502e-09
25- 50 1.155e-08 6.720e-09
50-150 2.533e-08 1.445e-08
15-150 4.289e-08 2.448e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.18913 (-1.86439 2.49822)
R1^2/D10^2 : 9.04130 (-7.95061 227.092)
kT2 [keV] : 28.3449 (-6.7974 12.0241)
R2^2/D10^2 : 1.58087E-02 (-0.0103057 0.0215561)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.28 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 55 degrees of freedom
# Null hypothesis probability = 8.039600e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.296e-09 3.458e-09
25- 50 8.495e-09 4.194e-09
50-150 3.674e-08 2.154e-08
15-150 5.153e-08 2.395e-08
Peak spectrum fit
Power-law model
Time interval is from -0.320 sec. to 0.680 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40045 ( -0.456248 0.46833 )
Norm@50keV : 5.18573E-03 ( -0.00123245 0.00122163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.12 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.981053e-01
Photon flux (15-150 keV) in 1 sec: 0.631589 ( -0.153126 0.153986 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.01037e-08 ( -1.31519e-08 1.33751e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.320 sec. to 0.680 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41046 ( -1.00325 0.462487 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 5.18475E-03 ( -0.00120887 0.0187297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.12 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 56 degrees of freedom
# Null hypothesis probability = 3.622388e-01
Photon flux (15-150 keV) in 1 sec: 0.632700 ( -0.158875 0.152607 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98975e-08 ( -1.30051e-08 1.35074e-08 ) ergs/cm2
Band function
Time interval is from -0.320 sec. to 0.680 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.39511 ( -0.742 1.26588 )
beta : -10.00000 ( 10 10 )
Epeak [keV] : 9999.36 ( -9932.46 -9999.36 )
Norm@50keV : 5.19731E-03 ( -0.00123012 0.0187561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.12 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 55 degrees of freedom
# Null hypothesis probability = 3.275696e-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] : 21.0951 (-5.84986 8.43199)
R^2/D10^2 : 2.27942E-02 (-0.0150226 0.0436785)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.25 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 57 degrees of freedom
# Null hypothesis probability = 2.376302e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.913e-09 1.084e-09
25- 50 9.859e-09 5.222e-09
50-150 3.271e-08 2.000e-08
15-150 4.448e-08 2.259e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.360 (-104.749 -199.362)
Norm : 2.59779 (-0.611359 0.612836)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.700306e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.469e-09 3.829e-09
25- 50 1.244e-08 7.370e-09
50-150 2.729e-08 1.618e-08
15-150 4.620e-08 2.670e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.84906 (-1.9985 3.83721)
R1^2/D10^2 : 44.2641 (-46.9899 63175.3)
kT2 [keV] : 24.6851 (-6.9848 13.8922)
R2^2/D10^2 : 1.29481E-02 (-0.00988922 0.0162932)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.75 using 59 PHA bins.
# Reduced chi-squared = 1.014 for 55 degrees of freedom
# Null hypothesis probability = 4.465040e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.341e-09 4.104e-09
25- 50 8.500e-09 4.717e-09
50-150 3.520e-08 2.152e-08
15-150 5.104e-08 2.820e-08
Plot creation:
Thu Mar 20 18:33:47 EDT 2014