batgrbproduct Analysis for Trigger=424716
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Jun 15 16:32:36 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger424716/GCN5_download_cron
======================================================================
Trigger: 00424716 Segment: 000
BAT Trigger Time: 298244312 [s; MET]
Trigger Stop: 298244376 [s; MET]
UTC: 2010-06-14T21:38:26.107200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 263.519270851498 Dec: 49.2267444131814 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.39
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 14.39
Flight Position: [ source = BAT ]
RA: 263.519270851498 Dec: 49.2267444131814 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 263.534082538465 Dec: 49.2323223830998 [deg; J2000]
{ 17h 34m 08.2s , +49d 13' 56.4" }
+/- 1.63048454952003 [arcmin] (estimated 90% radius based on SNR)
+/- 0.623166504191694 [arcmin] (formal 1-sigma fit error)
SNR: 15.1289513389692
Angular difference between Flight and Ground position is 0.669936 arcmin
Partial Coding Fraction: 0.5625 [ including projection effects ]
Duration
T90: 225 +/- 55.7314991723711
Measured from: 1.19209289550781e-07
to: 225.000000119209 [s; relative to TRIGTIME]
T50: 79 +/- 20.6155281280883
Measured from: 30.0000001192093
to: 109.000000119209 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 31
to: 32 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9
to: 282 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.712221 1.787818 1.069225 0.224191
0.110247 0.115863 0.108781 0.112821 [error]
Peak 0.024377 0.012900 0.041390 0.007027
0.007787 0.008550 0.007889 0.008108 [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 5.41e-07 7.87e-07 8.53e-07 1.73e-06 2.71e-06 3.91e-06 erg/cm2
Error 6.12e-08 5.78e-08 1.09e-07 4.50e-07 2.45e-07 5.55e-07 erg/cm2
Peak flux Power-law 1.71e-01 2.14e-01 1.95e-01 3.10e-01 6.86e-01 8.90e-01 ph/cm2/s
Error 9.86e-02 7.38e-02 6.52e-02 2.37e-01 2.00e-01 2.80e-01 ph/cm2/s
Fluence Cutoff-PL 5.34e-07 7.99e-07 8.50e-07 1.34e-06 2.67e-06 3.52e-06 erg/cm2
Error 6.75e-08 7.10e-08 8.29e-08 7.08e-07 2.82e-07 9.19e-07 erg/cm2
Peak flux Cutoff-PL 1.81e-01 2.19e-01 1.91e-01 3.09e-01 6.86e-01 8.74e-01 ph/cm2/s
Error 1.40e-01 9.22e-02 5.79e-02 2.36e-01 2.00e-01 3.59e-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 7.97e-01 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 1.884 0.147 - - 1.01e-03 9.16e-05 72.410 57
CPL 1.718 0.000 73.8 0.0 1.25e-03 0.00e+00 72.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.132 0.555 - - 5.90e-03 1.67e-03 73.690 57
CPL 0.935 0.000 344.8 0.0 7.06e-03 0.00e+00 73.680 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: 143.808000 sec.
T50 in the 50-300 keV band: 56.768000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 291.000 -9.000 282.000
T90 225.000 0.000 225.000
T50 79.000 30.000 109.000
Peak 1.000 31.000 32.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
263.5341 +49.2323 0.0127 28.3 42.3 2.5387 15.1 TRIG_00424716
------------------------------------------
Foreground time interval of the image:
-9.000 71.501 (delta_t = 80.501 [sec])
Background time interval of the image:
-239.000 -200.210 (delta_t = 38.790 [sec])
-199.000 -9.000 (delta_t = 190.000 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 -9.000 sec. to 282.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88406 ( -0.145077 0.14952 )
Norm@50keV : 1.01427E-03 ( -9.24315e-05 9.08196e-05 )
------------------------------------------------------------
# Chi-Squared = 72.41 using 59 PHA bins.
# Reduced chi-squared = 1.270 for 57 degrees of freedom
# Null hypothesis probability = 8.202497e-02
Photon flux (15-150 keV) in 291 sec: 0.144583 ( -0.0106757 0.0106827 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.71332e-06 ( -2.42325e-07 2.46786e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.000 sec. to 282.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71802 ( )
Epeak [keV] : 73.8375 ( )
Norm@50keV : 1.25329E-03 ( )
------------------------------------------------------------
# Chi-Squared = 72.24 using 59 PHA bins.
# Reduced chi-squared = 1.290 for 56 degrees of freedom
# Null hypothesis probability = 7.098571e-02
Photon flux (15-150 keV) in 291 sec: 0.143513 ( -0.010956 0.01242 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67015e-06 ( -2.94501e-07 2.69824e-07 ) ergs/cm2
Band function
Time interval is from -9.000 sec. to 282.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.501833 ( 0.499951 0.499951 )
beta : -1.92117 ( 1.92116 0.173419 )
Epeak [keV] : 25.7322 ( -25.7057 398.721 )
Norm@50keV : 1.16276E-02 ( -0.0117963 213.821 )
------------------------------------------------------------
# Chi-Squared = 72.10 using 59 PHA bins.
# Reduced chi-squared = 1.311 for 55 degrees of freedom
# Null hypothesis probability = 6.074512e-02
Photon flux (15-150 keV) in 291 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] : 10.4733 ( )
R^2/D10^2 : 5.44927E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 117.83 using 59 PHA bins.
# Reduced chi-squared = 2.0671 for 57 degrees of freedom
# Null hypothesis probability = 3.971993e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.593e-07 4.627e-08
25- 50 9.523e-07 9.166e-08
50-150 5.673e-07 1.106e-07
15-150 1.879e-06 1.750e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.8597 (-20.5081 32.8035)
Norm : 0.661279 (-0.0718868 0.0885627)
------------------------------------------------------------
# Chi-Squared = 73.94 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 57 degrees of freedom
# Null hypothesis probability = 6.516028e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.007e-07 5.587e-08
25- 50 8.335e-07 6.868e-08
50-150 1.214e-06 4.493e-07
15-150 2.548e-06 4.736e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.82805 (-1.03755 1.5329)
R1^2/D10^2 : 0.366375 (-0.256584 0.564396)
kT2 [keV] : 22.1188 (-4.08244 9.36104)
R2^2/D10^2 : 2.55991E-03 ( )
------------------------------------------------------------
# Chi-Squared = 72.93 using 59 PHA bins.
# Chi-Squared = 72.89 using 59 PHA bins.
# Reduced chi-squared = 1.326 for 55 degrees of freedom
# Reduced chi-squared = 1.325 for 55 degrees of freedom
# Null hypothesis probability = 5.318835e-02
# Null hypothesis probability = 5.356587e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.356e-07 1.619e-07
25- 50 7.773e-07 2.341e-07
50-150 1.282e-06 7.022e-07
15-150 2.595e-06 1.056e-06
Peak spectrum fit
Power-law model
Time interval is from 31.000 sec. to 32.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13242 ( -0.557836 0.552249 )
Norm@50keV : 5.89530E-03 ( -0.00167144 0.0016708 )
------------------------------------------------------------
# Chi-Squared = 73.69 using 59 PHA bins.
# Reduced chi-squared = 1.293 for 57 degrees of freedom
# Null hypothesis probability = 6.764586e-02
Photon flux (15-150 keV) in 1 sec: 0.686130 ( -0.199262 0.200232 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.10114e-08 ( -1.95031e-08 1.98347e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 31.000 sec. to 32.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.935113 ( )
Epeak [keV] : 344.806 ( )
Norm@50keV : 7.06435E-03 ( )
------------------------------------------------------------
# Chi-Squared = 73.68 using 59 PHA bins.
# Reduced chi-squared = 1.316 for 56 degrees of freedom
# Null hypothesis probability = 5.670114e-02
Photon flux (15-150 keV) in 1 sec: 0.685849 ( -0.199195 0.200177 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.09263e-08 ( -1.95415e-08 1.94829e-08 ) ergs/cm2
Band function
Time interval is from 31.000 sec. to 32.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.91078 ( 3.28998 2.91078 )
beta : -1.13241 ( -0.552076 0.557776 )
Epeak [keV] : 204.174 ( -204.174 -204.174 )
Norm@50keV : 0.801254 ( -0.226836 0.227092 )
------------------------------------------------------------
# Chi-Squared = 73.69 using 59 PHA bins.
# Reduced chi-squared = 1.340 for 55 degrees of freedom
# Null hypothesis probability = 4.698738e-02
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] : 24.8669 (-7.14378 12.2242)
R^2/D10^2 : 1.65605E-02 (-0.0165618 0.0310754)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 74.93 using 59 PHA bins.
# Reduced chi-squared = 1.315 for 57 degrees of freedom
# Null hypothesis probability = 5.580936e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.784e-09 1.119e-09
25- 50 1.009e-08 6.165e-09
50-150 4.632e-08 2.897e-08
15-150 5.819e-08 3.502e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.349 (-100.898 -199.9)
Norm : 2.79741 (-0.818371 0.818346)
------------------------------------------------------------
# Chi-Squared = 75.73 using 59 PHA bins.
# Reduced chi-squared = 1.329 for 57 degrees of freedom
# Null hypothesis probability = 4.913828e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.966e-09 4.089e-09
25- 50 1.340e-08 7.890e-09
50-150 2.939e-08 1.756e-08
15-150 4.975e-08 2.948e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.03947 (-1.85805 2.74218)
R1^2/D10^2 : 27.7607 (-27.3525 70639.6)
kT2 [keV] : 28.4609 (-8.43746 17.2647)
R2^2/D10^2 : 1.03748E-02 (-0.00772044 0.0225308)
------------------------------------------------------------
# Chi-Squared = 68.69 using 59 PHA bins.
# Reduced chi-squared = 1.249 for 55 degrees of freedom
# Null hypothesis probability = 1.015265e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.983e-09 4.027e-09
25- 50 9.045e-09 5.300e-09
50-150 4.773e-08 2.967e-08
15-150 6.376e-08 3.490e-08
Plot creation:
Tue Jun 15 16:59:32 EDT 2010