batgrbproduct Analysis for Trigger=514586
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): Sun Feb 12 00:24:34 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger514586/GCN5_download_cron
======================================================================
Trigger: 00514586 Segment: 000
BAT Trigger Time: 350654315.968 [s; MET]
Trigger Stop: 350654324.16 [s; MET]
UTC: 2012-02-11T11:58:28.088540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 87.751188537819 Dec: -24.7591984547618 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.93
Image Trigger?: NO
Rate S/N Ratio: 8.24621125123532 [ if not an image trigger ]
Image S/N Ratio: 7.93
Flight Position: [ source = BAT ]
RA: 87.751188537819 Dec: -24.7591984547618 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 87.7813543741072 Dec: -24.79543917199 [deg; J2000]
{ 05h 51m 07.5s , -24d 47' 43.6" }
+/- 2.13417200322076 [arcmin] (estimated 90% radius based on SNR)
+/- 1.26928140611042 [arcmin] (formal 1-sigma fit error)
SNR: 10.2988952137709
Angular difference between Flight and Ground position is 2.725572 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 58.2879999876022 +/- 6.15509932974362
Measured from: 3.66400015354156
to: 61.9520001411438 [s; relative to TRIGTIME]
T50: 21.5519999861717 +/- 15.4027841365273
Measured from: 7.84000015258789
to: 29.3920001387596 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 41.0120000243187
to: 42.0120000243187 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.33599996566772
to: 65.2319999933243 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.331809 0.426943 0.391786 0.124851
0.053727 0.055632 0.050424 0.048772 [error]
Peak 0.020824 0.011586 0.022640 0.005888
0.006666 0.006754 0.006200 0.005987 [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 1.07e-07 2.02e-07 2.92e-07 9.01e-07 8.30e-07 1.50e-06 erg/cm2
Error 2.28e-08 2.68e-08 4.96e-08 3.25e-07 1.21e-07 3.65e-07 erg/cm2
Peak flux Power-law 1.53e-01 1.55e-01 1.11e-01 1.26e-01 4.68e-01 5.44e-01 ph/cm2/s
Error 9.20e-02 5.87e-02 5.20e-02 1.29e-01 1.68e-01 2.00e-01 ph/cm2/s
Fluence Cutoff-PL 9.56e-08 2.27e-07 2.98e-07 2.26e-07 8.46e-07 0.00e+00 erg/cm2
Error 2.83e-08 3.63e-08 5.75e-08 4.32e-07 4.18e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.54e-01 1.55e-01 1.10e-01 1.25e-01 4.68e-01 5.45e-01 ph/cm2/s
Error 1.26e-01 6.47e-02 5.73e-02 1.47e-01 1.68e-01 2.34e-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 1.465 0.219 - - 1.29e-03 1.69e-04 52.210 57
CPL 0.463 1.140 74.7 390.9 4.20e-03 9.07e-03 49.300 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.487 0.678 - - 3.76e-03 1.41e-03 53.360 57
CPL 1.484 1.932 9985.8 0.0 3.77e-03 3.51e-02 53.360 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: 53.952000 sec.
T50 in the 50-300 keV band: 23.424000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 67.568 -2.336 65.232
T90 58.288 3.664 61.952
T50 21.552 7.840 29.392
Peak 1.000 41.012 42.012
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
87.7814 -24.7954 0.0187 32.2 -141.8 0.9819 10.3 TRIG_00514586
------------------------------------------
Foreground time interval of the image:
-2.336 49.733 (delta_t = 52.069 [sec])
Background time interval of the image:
-239.968 -165.268 (delta_t = 74.700 [sec])
-163.968 -154.808 (delta_t = 9.160 [sec])
-153.968 -116.608 (delta_t = 37.360 [sec])
-114.968 -2.336 (delta_t = 112.632 [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 -2.336 sec. to 65.232 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46488 ( -0.217603 0.219934 )
Norm@50keV : 1.28693E-03 ( -0.000169931 0.00016879 )
------------------------------------------------------------
# Chi-Squared = 52.21 using 59 PHA bins.
# Reduced chi-squared = 0.9160 for 57 degrees of freedom
# Null hypothesis probability = 6.549273e-01
Photon flux (15-150 keV) in 67.57 sec: 0.159190 ( -0.0205741 0.0206043 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.29888e-07 ( -1.20143e-07 1.22001e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.336 sec. to 65.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.462719 ( -1.28498 0.995397 )
Epeak [keV] : 74.7294 ( -19.3038 762.582 )
Norm@50keV : 4.19769E-03 ( -0.00419772 0.0139435 )
------------------------------------------------------------
# Chi-Squared = 49.30 using 59 PHA bins.
# Reduced chi-squared = 0.8803 for 56 degrees of freedom
# Null hypothesis probability = 7.246870e-01
Photon flux (15-150 keV) in 67.57 sec: 0.152228 ( -0.021978 0.021833 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.46456e-07 ( -2.05817e-07 6.30928e-07 ) ergs/cm2
Band function
Time interval is from -2.336 sec. to 65.232 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.391579 ( -0.786547 0.639433 )
beta : -2.36240 ( 2.25833 2.69018 )
Epeak [keV] : 72.3456 ( -38.1355 471.603 )
Norm@50keV : 4.57753E-03 ( -0.00324302 41.6036 )
------------------------------------------------------------
# Chi-Squared = 49.08 using 59 PHA bins.
# Reduced chi-squared = 0.8924 for 55 degrees of freedom
# Null hypothesis probability = 6.990424e-01
Photon flux (15-150 keV) in 67.57 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] : 15.0071 (-1.99595 2.37137)
R^2/D10^2 : 1.86073E-02 (-0.00752891 0.0121446)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 54.52 using 59 PHA bins.
# Reduced chi-squared = 0.9565 for 57 degrees of freedom
# Null hypothesis probability = 5.686777e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.928e-08 1.528e-08
25- 50 2.356e-07 4.743e-08
50-150 3.612e-07 9.325e-08
15-150 6.562e-07 1.199e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.360 (-79.5988 -199.754)
Norm : 0.655059 (-0.0831236 0.0832386)
------------------------------------------------------------
# Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.8964 for 57 degrees of freedom
# Null hypothesis probability = 6.950218e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.102e-07 5.973e-08
25- 50 2.120e-07 1.146e-07
50-150 4.650e-07 2.526e-07
15-150 7.873e-07 4.243e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.55823 (-2.80902 5.86708)
R1^2/D10^2 : 0.501710 (-0.463635 124.161)
kT2 [keV] : 17.7240 (-3.23861 10.451)
R2^2/D10^2 : 9.41171E-03 (-0.008199 0.0107764)
------------------------------------------------------------
# Chi-Squared = 48.66 using 59 PHA bins.
# Reduced chi-squared = 0.8848 for 55 degrees of freedom
# Null hypothesis probability = 7.138799e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.629e-08 4.869e-08
25- 50 2.127e-07 8.683e-08
50-150 4.180e-07 2.035e-07
15-150 7.269e-07 2.906e-07
Peak spectrum fit
Power-law model
Time interval is from 41.012 sec. to 42.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48663 ( -0.672925 0.683115 )
Norm@50keV : 3.75895E-03 ( -0.00143595 0.00138012 )
------------------------------------------------------------
# Chi-Squared = 53.36 using 59 PHA bins.
# Reduced chi-squared = 0.9362 for 57 degrees of freedom
# Null hypothesis probability = 6.123661e-01
Photon flux (15-150 keV) in 1 sec: 0.467598 ( -0.167737 0.168318 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57384e-08 ( -1.43632e-08 1.50977e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.012 sec. to 42.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48412 ( -2.44754 1.4172 )
Epeak [keV] : 9985.84 ( )
Norm@50keV : 3.77054E-03 ( -0.00377055 0.0665004 )
------------------------------------------------------------
# Chi-Squared = 53.36 using 59 PHA bins.
# Reduced chi-squared = 0.9529 for 56 degrees of freedom
# Null hypothesis probability = 5.753672e-01
Photon flux (15-150 keV) in 1 sec: 0.467922 ( -0.168077 0.167678 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.35303e-08 ( -6.35303e-08 5.93447e-08 ) ergs/cm2
Band function
Time interval is from 41.012 sec. to 42.012 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94210 ( -34.9779 -34.9779 )
beta : -1.70440 ( -1.2116 0.783083 )
Epeak [keV] : 25.7121 ( -25.696 12.0366 )
Norm@50keV : 324.653 ( -332.128 211.416 )
------------------------------------------------------------
# Chi-Squared = 52.51 using 59 PHA bins.
# Reduced chi-squared = 0.9547 for 55 degrees of freedom
# Null hypothesis probability = 5.704746e-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] : 17.4665 (-10.2351 13.5396)
R^2/D10^2 : 3.04693E-02 (-0.0301695 0.650948)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 56.52 using 59 PHA bins.
# Reduced chi-squared = 0.9916 for 57 degrees of freedom
# Null hypothesis probability = 4.930201e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.879e-09 1.251e-09
25- 50 8.491e-09 5.475e-09
50-150 1.865e-08 1.297e-08
15-150 2.902e-08 1.911e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.998 -199.998)
Norm : 1.90975 (-0.678231 0.9387)
------------------------------------------------------------
# Chi-Squared = 53.44 using 59 PHA bins.
# Reduced chi-squared = 0.9375 for 57 degrees of freedom
# Null hypothesis probability = 6.094299e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.755e-09 2.983e-09
25- 50 9.148e-09 5.680e-09
50-150 2.006e-08 1.253e-08
15-150 3.397e-08 2.101e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.48368 (-2.4672 2.3228)
R1^2/D10^2 : 1.42516 (-1.27646 11.6311)
kT2 [keV] : 27.8659 (-25.066 -28.116)
R2^2/D10^2 : 5.36761E-03 (-0.00519008 0.0366776)
------------------------------------------------------------
# Chi-Squared = 51.77 using 59 PHA bins.
# Reduced chi-squared = 0.9412 for 55 degrees of freedom
# Null hypothesis probability = 5.989656e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.627e-09 3.465e-09
25- 50 8.101e-09 4.493e-09
50-150 2.316e-08 1.471e-08
15-150 3.689e-08 2.012e-08
Plot creation:
Sun Feb 12 00:50:05 EST 2012