batgrbproduct Analysis for Trigger=509543
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 Dec 12 16:14:08 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger509543/GCN5_download_cron
======================================================================
Trigger: 00509543 Segment: 000
BAT Trigger Time: 345374594.752 [s; MET]
Trigger Stop: 345374602.944 [s; MET]
UTC: 2011-12-12T09:23:07.084300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 310.404448660982 Dec: -68.6171052622876 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.09
Image Trigger?: NO
Rate S/N Ratio: 8.48528137423857 [ if not an image trigger ]
Image S/N Ratio: 8.09
Flight Position: [ source = BAT ]
RA: 310.404448660982 Dec: -68.6171052622876 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 310.441986523505 Dec: -68.5845812230042 [deg; J2000]
{ 20h 41m 46.1s , -68d 35' 04.5" }
+/- 1.75176756418004 [arcmin] (estimated 90% radius based on SNR)
+/- 0.794818192565792 [arcmin] (formal 1-sigma fit error)
SNR: 13.6550984669123
Angular difference between Flight and Ground position is 2.117412 arcmin
Partial Coding Fraction: 0.359375 [ including projection effects ]
Duration
T90: 59.8400000333786 +/- 9.90246842182212
Measured from: -1.7519998550415
to: 58.0880001783371 [s; relative to TRIGTIME]
T50: 27.8560000658035 +/- 7.89317475157815
Measured from: 6.9520001411438
to: 34.8080002069473 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.76399999856949
to: 5.76399999856949 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.76799994707108
to: 62.744000017643 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.583429 0.903486 0.603298 0.111671
0.081426 0.081749 0.070921 0.060638 [error]
Peak 0.031678 0.038937 0.025113 0.020851
0.010421 0.010272 0.008926 0.007818 [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 2.25e-07 3.74e-07 4.71e-07 1.19e-06 1.40e-06 2.25e-06 erg/cm2
Error 3.85e-08 4.04e-08 6.97e-08 3.66e-07 1.67e-07 4.26e-07 erg/cm2
Peak flux Power-law 2.97e-01 2.76e-01 1.77e-01 1.75e-01 8.23e-01 9.26e-01 ph/cm2/s
Error 1.55e-01 8.95e-02 7.55e-02 1.61e-01 2.59e-01 2.88e-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 2.98e-01 2.76e-01 1.77e-01 1.74e-01 8.23e-01 9.26e-01 ph/cm2/s
Error 1.18e-01 9.41e-02 7.55e-02 1.89e-01 2.55e-01 3.05e-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 1.665 0.185 - - 2.20e-03 2.47e-04 48.480 57
CPL 1.040 0.823 73.0 -27.1 4.69e-03 6.24e-03 46.610 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.638 0.601 - - 6.33e-03 2.11e-03 58.160 57
CPL 2.168 0.000 65.0 0.0 3.27e-03 0.00e+00 58.140 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 68.512 -5.768 62.744
T90 59.840 -1.752 58.088
T50 27.856 6.952 34.808
Peak 1.000 4.764 5.764
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
310.4420 -68.5846 0.0141 36.2 -58.9 2.0863 13.7 TRIG_00509543
------------------------------------------
Foreground time interval of the image:
-5.768 46.849 (delta_t = 52.617 [sec])
Background time interval of the image:
-239.752 -5.768 (delta_t = 233.984 [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 -5.768 sec. to 62.744 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66515 ( -0.183005 0.187137 )
Norm@50keV : 2.20076E-03 ( -0.00024809 0.000245574 )
------------------------------------------------------------
# Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8506 for 57 degrees of freedom
# Null hypothesis probability = 7.817027e-01
Photon flux (15-150 keV) in 68.51 sec: 0.288817 ( -0.0312247 0.0312817 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40019e-06 ( -1.65663e-07 1.67445e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.768 sec. to 62.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03974 ( -0.941827 0.703503 )
Epeak [keV] : 73.0200 ( -18.7533 -73.0206 )
Norm@50keV : 4.69054E-03 ( -0.0026242 0.00985001 )
------------------------------------------------------------
# Chi-Squared = 46.61 using 59 PHA bins.
# Reduced chi-squared = 0.8323 for 56 degrees of freedom
# Null hypothesis probability = 8.102172e-01
Photon flux (15-150 keV) in 68.51 sec: 0.281075 ( -0.032818 0.032691 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -5.768 sec. to 62.744 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.687706 ( 0.687031 5.66614 )
beta : -2.08660 ( 2.0769 0.486157 )
Epeak [keV] : 57.9267 ( -57.3639 292.911 )
Norm@50keV : 7.63481E-03 ( -0.00773198 46.2556 )
------------------------------------------------------------
# Chi-Squared = 46.19 using 59 PHA bins.
# Reduced chi-squared = 0.8399 for 55 degrees of freedom
# Null hypothesis probability = 7.952202e-01
Photon flux (15-150 keV) in 68.51 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] : 13.0016 (-1.54544 1.80038)
R^2/D10^2 : 5.32658E-02 (-0.0201847 0.0314842)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 60.56 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 57 degrees of freedom
# Null hypothesis probability = 3.487506e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.308e-07 2.692e-08
25- 50 4.507e-07 6.351e-08
50-150 4.817e-07 1.066e-07
15-150 1.063e-06 1.480e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 138.074 (-11.3571 -100.69)
Norm : 1.20928 (-0.149313 0.179955)
------------------------------------------------------------
# Chi-Squared = 46.82 using 59 PHA bins.
# Reduced chi-squared = 0.8214 for 57 degrees of freedom
# Null hypothesis probability = 8.298611e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.141e-07 3.086e-08
25- 50 3.920e-07 4.611e-08
50-150 7.469e-07 1.274e-07
15-150 1.353e-06 1.535e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.30668 (-3.40118 2.94127)
R1^2/D10^2 : 0.187485 (-0.109028 0.344026)
kT2 [keV] : 27.3050 (-10.9577 128.564)
R2^2/D10^2 : 2.35502E-03 (-0.00224521 0.0163512)
------------------------------------------------------------
# Chi-Squared = 47.14 using 59 PHA bins.
# Reduced chi-squared = 0.8570 for 55 degrees of freedom
# Null hypothesis probability = 7.655533e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.845e-07 8.326e-08
25- 50 4.250e-07 2.016e-07
50-150 7.311e-07 4.016e-07
15-150 1.341e-06 6.312e-07
Peak spectrum fit
Power-law model
Time interval is from 4.764 sec. to 5.764 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63754 ( -0.594778 0.606286 )
Norm@50keV : 6.32717E-03 ( -0.00215943 0.0020554 )
------------------------------------------------------------
# Chi-Squared = 58.16 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.323067e-01
Photon flux (15-150 keV) in 1 sec: 0.822810 ( -0.2589 0.25971 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.89205e-08 ( -2.04757e-08 2.11958e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.764 sec. to 5.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16812 ( )
Epeak [keV] : 64.9838 ( )
Norm@50keV : 3.26943E-03 ( )
------------------------------------------------------------
# Chi-Squared = 58.14 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 56 degrees of freedom
# Null hypothesis probability = 3.965683e-01
Photon flux (15-150 keV) in 1 sec: 0.822860 ( -0.256128 0.25341 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.9041e-08 ( -2.10477e-08 2.11047e-08 ) ergs/cm2
Band function
Time interval is from 4.764 sec. to 5.764 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.82844 ( -13.1025 -13.1025 )
beta : -1.84539 ( -1.02989 0.722244 )
Epeak [keV] : 25.8991 ( -25.9282 11.6879 )
Norm@50keV : 481.404 ( -476.896 370.386 )
------------------------------------------------------------
# Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.739477e-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] : 10.2020 (-3.57641 9.20073)
R^2/D10^2 : 0.349544 (-0.345868 1.47021)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 62.64 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.831601e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.458e-09 4.791e-09
25- 50 1.907e-08 1.189e-08
50-150 1.054e-08 7.980e-09
15-150 3.707e-08 2.294e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 170.930 (-102.036 -102.036)
Norm : 3.33301 (-1.06021 1.93956)
------------------------------------------------------------
# Chi-Squared = 58.55 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.182280e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.454e-09 3.553e-09
25- 50 1.595e-08 5.637e-09
50-150 3.315e-08 1.081e-08
15-150 5.756e-08 1.827e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.34579 (-2.98992 4.12437)
R1^2/D10^2 : 1.04908 (-0.863379 3.71523)
kT2 [keV] : 71.1086 (-54.9456 -71.8703)
R2^2/D10^2 : 6.79506E-04 (-0.000617089 0.0039013)
------------------------------------------------------------
# Chi-Squared = 56.54 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 55 degrees of freedom
# Null hypothesis probability = 4.172456e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.816e-09 6.195e-09
25- 50 1.649e-08 9.745e-09
50-150 3.816e-08 2.119e-08
15-150 6.446e-08 3.139e-08
Plot creation:
Mon Dec 12 16:52:17 EST 2011