batgrbproduct Analysis for Trigger=503219
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): Fri Sep 16 04:03:39 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger503219/GCN5_download_cron
======================================================================
Trigger: 00503219 Segment: 000
BAT Trigger Time: 337785651.776 [s; MET]
Trigger Stop: 337785652.8 [s; MET]
UTC: 2011-09-15T13:20:44.408340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 310.850908926637 Dec: -0.709481126574814 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.14
Image Trigger?: NO
Rate S/N Ratio: 11.6189500386223 [ if not an image trigger ]
Image S/N Ratio: 7.14
Flight Position: [ source = BAT ]
RA: 310.850908926637 Dec: -0.709481126574814 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 310.830043141867 Dec: -0.712726351953069 [deg; J2000]
{ 20h 43m 19.2s , -00d 42' 45.8" }
+/- 1.18384439664244 [arcmin] (estimated 90% radius based on SNR)
+/- 0.485969316477068 [arcmin] (formal 1-sigma fit error)
SNR: 23.9007635729886
Angular difference between Flight and Ground position is 1.266903 arcmin
Partial Coding Fraction: 0.2578125 [ including projection effects ]
Duration
T90: 78.7599999308586 +/- 1.24921096784905
Measured from: 1.0320001244545
to: 79.7920000553131 [s; relative to TRIGTIME]
T50: 56.6639999747276 +/- 0.805779184317703
Measured from: 11.8280000686646
to: 68.4920000433922 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 68.039999961853
to: 69.039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.74000000953674
to: 92.0999999642372 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.089561 3.251497 2.766364 0.706347
0.077250 0.078789 0.070418 0.058310 [error]
Peak 0.091906 0.137096 0.133766 0.039475
0.006299 0.006862 0.006388 0.004912 [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 1.38e-06 2.07e-06 6.74e-06 5.83e-06 1.09e-05 erg/cm2
Error 4.09e-08 4.64e-08 7.07e-08 5.23e-07 1.76e-07 5.60e-07 erg/cm2
Peak flux Power-law 9.06e-01 1.05e+00 8.71e-01 1.22e+00 3.26e+00 4.04e+00 ph/cm2/s
Error 9.21e-02 6.40e-02 5.16e-02 1.55e-01 1.75e-01 2.13e-01 ph/cm2/s
Fluence Cutoff-PL 6.35e-07 1.42e-06 2.16e-06 3.79e-06 5.67e-06 8.01e-06 erg/cm2
Error 5.24e-08 5.11e-08 8.25e-08 9.63e-07 1.93e-07 9.68e-07 erg/cm2
Peak flux Cutoff-PL 8.66e-01 1.06e+00 8.89e-01 9.98e-01 3.23e+00 3.81e+00 ph/cm2/s
Error 1.16e-01 6.90e-02 6.20e-02 3.25e-01 1.83e-01 3.83e-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 1.413 0.052 - - 6.49e-03 1.86e-04 72.110 57
CPL 0.943 0.226 124.8 41.4 1.06e-02 2.47e-03 58.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.267 0.091 - - 2.75e-02 1.41e-03 56.210 57
CPL 1.078 0.304 270.7 0.0 3.36e-02 1.16e-02 55.360 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: 77.760000 sec.
T50 in the 50-300 keV band: 55.808000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 94.840 -2.740 92.100
T90 78.760 1.032 79.792
T50 56.664 11.828 68.492
Peak 1.000 68.040 69.040
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
310.8300 -0.7127 0.0081 33.0 81.8 2.2229 23.9 TRIG_00503219
------------------------------------------
Foreground time interval of the image:
-2.740 10.825 (delta_t = 13.565 [sec])
Background time interval of the image:
-239.776 -2.740 (delta_t = 237.036 [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
Multiple GTIs in the spectrum
tstart tstop
-2.740000 88.634000
90.224000 92.100000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41338 ( -0.0523755 0.0523092 )
Norm@50keV : 6.49121E-03 ( -0.00018565 0.000185645 )
------------------------------------------------------------
# Chi-Squared = 72.11 using 59 PHA bins.
# Reduced chi-squared = 1.265 for 57 degrees of freedom
# Null hypothesis probability = 8.571831e-02
Photon flux (15-150 keV) in 93.25 sec: 0.792942 ( -0.0248506 0.0249182 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.8331e-06 ( -1.75848e-07 1.76086e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-2.740000 88.634000
90.224000 92.100000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.942516 ( -0.231325 0.220036 )
Epeak [keV] : 124.844 ( -23.7364 59.0182 )
Norm@50keV : 1.06109E-02 ( -0.00212657 0.00281116 )
------------------------------------------------------------
# Chi-Squared = 58.07 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 56 degrees of freedom
# Null hypothesis probability = 3.989943e-01
Photon flux (15-150 keV) in 93.25 sec: 0.768335 ( -0.026972 0.027071 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.6736e-06 ( -1.93335e-07 1.92393e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-2.740000 88.634000
90.224000 92.100000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.951944 ( -0.210867 0.171983 )
beta : -9.32723 ( 9.66068 19.6607 )
Epeak [keV] : 126.578 ( -14.5817 42.0687 )
Norm@50keV : 1.04953E-02 ( -0.00029939 0.00238532 )
------------------------------------------------------------
# Chi-Squared = 58.08 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 55 degrees of freedom
# Null hypothesis probability = 3.626867e-01
Photon flux (15-150 keV) in 93.25 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] : 17.5724 ( )
R^2/D10^2 : 5.23026E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 242.97 using 59 PHA bins.
# Reduced chi-squared = 4.2626 for 57 degrees of freedom
# Null hypothesis probability = 8.248377e-25
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.038e-07 1.730e-08
25- 50 1.380e-06 5.502e-08
50-150 3.072e-06 1.604e-07
15-150 4.756e-06 1.534e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.989 ( )
Norm : 3.31542 (-3.31542 -3.31542)
------------------------------------------------------------
# Chi-Squared = 87.75 using 59 PHA bins.
# Reduced chi-squared = 1.540 for 57 degrees of freedom
# Null hypothesis probability = 5.515878e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.700e-07 3.905e-07
25- 50 1.481e-06 7.525e-07
50-150 3.249e-06 1.652e-06
15-150 5.500e-06 2.795e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.01280 (-0.998034 1.0883)
R1^2/D10^2 : 0.439694 (-0.141592 0.238117)
kT2 [keV] : 27.6270 (-2.75492 3.85544)
R2^2/D10^2 : 8.80624E-03 (-0.00336511 0.00429365)
------------------------------------------------------------
# Chi-Squared = 60.56 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 55 degrees of freedom
# Null hypothesis probability = 2.820619e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.796e-07 6.276e-08
25- 50 1.450e-06 9.838e-08
50-150 3.619e-06 3.502e-07
15-150 5.648e-06 4.453e-07
Peak spectrum fit
Power-law model
Time interval is from 68.040 sec. to 69.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26662 ( -0.0916169 0.0912545 )
Norm@50keV : 2.75236E-02 ( -0.00140716 0.00140714 )
------------------------------------------------------------
# Chi-Squared = 56.21 using 59 PHA bins.
# Reduced chi-squared = 0.9861 for 57 degrees of freedom
# Null hypothesis probability = 5.048461e-01
Photon flux (15-150 keV) in 1 sec: 3.26429 ( -0.174927 0.175242 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.74266e-07 ( -1.53173e-08 1.53639e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 68.040 sec. to 69.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07805 ( -0.375336 0.23206 )
Epeak [keV] : 270.664 ( -270.675 -270.675 )
Norm@50keV : 3.36475E-02 ( -0.00716156 0.0159779 )
------------------------------------------------------------
# Chi-Squared = 55.36 using 59 PHA bins.
# Reduced chi-squared = 0.9887 for 56 degrees of freedom
# Null hypothesis probability = 4.988590e-01
Photon flux (15-150 keV) in 1 sec: 3.23419 ( -0.18314 0.18327 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.71611e-07 ( -1.6344e-08 1.6237e-08 ) ergs/cm2
Band function
Time interval is from 68.040 sec. to 69.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.871919 ( 0.871134 5.50763 )
beta : -1.39507 ( 1.39614 0.197497 )
Epeak [keV] : 135.864 ( -139.503 -139.503 )
Norm@50keV : 4.37217E-02 ( -0.0161568 0 )
------------------------------------------------------------
# Chi-Squared = 55.00 using 59 PHA bins.
# Reduced chi-squared = 0.9999 for 55 degrees of freedom
# Null hypothesis probability = 4.747629e-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] : 18.4180 ( )
R^2/D10^2 : 0.192489 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 128.30 using 59 PHA bins.
# Reduced chi-squared = 2.2508 for 57 degrees of freedom
# Null hypothesis probability = 2.064539e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.298e-08 1.365e-09
25- 50 6.103e-08 4.910e-09
50-150 1.511e-07 1.325e-08
15-150 2.251e-07 1.450e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.994 ( )
Norm : 13.6460 (-13.646 -13.646)
------------------------------------------------------------
# Chi-Squared = 84.56 using 59 PHA bins.
# Reduced chi-squared = 1.483 for 57 degrees of freedom
# Null hypothesis probability = 1.034123e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.398e-08 1.752e-08
25- 50 6.537e-08 3.376e-08
50-150 1.434e-07 7.410e-08
15-150 2.427e-07 1.246e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.10046 (-2.25025 2.21551)
R1^2/D10^2 : 1.24078 (-0.554405 1.67676)
kT2 [keV] : 35.2048 (-8.28771 18.8743)
R2^2/D10^2 : 1.80945E-02 (-0.0128122 0.0273621)
------------------------------------------------------------
# Chi-Squared = 60.78 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 55 degrees of freedom
# Null hypothesis probability = 2.756006e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.328e-08 5.225e-09
25- 50 6.423e-08 1.157e-08
50-150 1.847e-07 5.843e-08
15-150 2.722e-07 7.635e-08
Plot creation:
Fri Sep 16 04:26:33 EDT 2011