batgrbproduct Analysis for Trigger=507342
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): Wed Nov 9 09:32:20 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger507342/GCN5_download_cron
======================================================================
Trigger: 00507342 Segment: 000
BAT Trigger Time: 342500273.6 [s; MET]
Trigger Stop: 342500277.696 [s; MET]
UTC: 2011-11-09T02:57:46.046320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 118.196067983082 Dec: -41.5986755526321 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.62
Image Trigger?: NO
Rate S/N Ratio: 13.856406460551 [ if not an image trigger ]
Image S/N Ratio: 8.62
Flight Position: [ source = BAT ]
RA: 118.196067983082 Dec: -41.5986755526321 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 118.247736079766 Dec: -41.5883610563832 [deg; J2000]
{ 07h 52m 59.5s , -41d 35' 18.1" }
+/- 1.92549682762997 [arcmin] (estimated 90% radius based on SNR)
+/- 0.822324613027445 [arcmin] (formal 1-sigma fit error)
SNR: 11.9296761737495
Angular difference between Flight and Ground position is 2.399647 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 13 +/- 3.16227766016838
Measured from: -5.59999990463257
to: 7.40000009536743 [s; relative to TRIGTIME]
T50: 6 +/- 2.82842712474619
Measured from: -3.59999990463257
to: 2.40000009536743 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.39999997615814
to: 2.39999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.60000002384186
to: 8.39999997615814 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.158021 0.196036 0.093795 0.007082
0.021959 0.022118 0.019459 0.017838 [error]
Peak 0.027623 0.024263 0.014827 0.003368
0.006098 0.006115 0.005396 0.004870 [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 4.72e-08 6.99e-08 7.74e-08 1.61e-07 2.44e-07 3.56e-07 erg/cm2
Error 9.22e-09 9.76e-09 1.82e-08 7.58e-08 4.23e-08 9.54e-08 erg/cm2
Peak flux Power-law 2.28e-01 1.81e-01 9.64e-02 7.48e-02 5.39e-01 5.80e-01 ph/cm2/s
Error 8.09e-02 4.72e-02 4.28e-02 6.45e-02 1.40e-01 1.57e-01 ph/cm2/s
Fluence Cutoff-PL 4.50e-08 7.65e-08 7.32e-08 4.50e-08 2.22e-07 2.40e-07 erg/cm2
Error 1.01e-08 1.40e-08 2.25e-08 9.58e-08 4.99e-08 1.26e-07 erg/cm2
Peak flux Cutoff-PL 2.24e-01 1.89e-01 9.49e-02 4.33e-02 5.34e-01 5.51e-01 ph/cm2/s
Error 8.55e-02 6.04e-02 5.09e-02 7.67e-02 1.42e-01 1.67e-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 2.24e-01 1.88e-01 5.60e-01 5.53e-01 0.00e+00 0.00e+00 ph/cm2/s
Error 8.55e-02 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 1.854 0.257 - - 1.89e-03 3.26e-04 50.330 57
CPL 1.130 1.230 48.3 0.0 5.09e-03 0.00e+00 49.090 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.907 0.499 - - 3.75e-03 1.27e-03 78.280 57
CPL 1.569 1.589 50.7 0.0 6.00e-03 0.00e+00 78.160 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 14.000 -5.600 8.400
T90 13.000 -5.600 7.400
T50 6.000 -3.600 2.400
Peak 1.000 1.400 2.400
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
118.2477 -41.5884 0.0162 17.0 34.9 0.5020 11.9 TRIG_00507342
------------------------------------------
Foreground time interval of the image:
-5.600 8.400 (delta_t = 14.000 [sec])
Background time interval of the image:
-239.600 -109.180 (delta_t = 130.420 [sec])
-107.600 -5.600 (delta_t = 102.000 [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 -5.600 sec. to 8.400 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85398 ( -0.249713 0.264211 )
Norm@50keV : 1.89176E-03 ( -0.000330348 0.000321697 )
------------------------------------------------------------
# Chi-Squared = 50.33 using 59 PHA bins.
# Reduced chi-squared = 0.8830 for 57 degrees of freedom
# Null hypothesis probability = 7.215242e-01
Photon flux (15-150 keV) in 14 sec: 0.266338 ( -0.0368874 0.0368879 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.4351e-07 ( -4.15646e-08 4.30352e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.600 sec. to 8.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12965 ( -1.42768 1.03234 )
Epeak [keV] : 48.2889 ( )
Norm@50keV : 5.08846E-03 ( )
------------------------------------------------------------
# Chi-Squared = 49.09 using 59 PHA bins.
# Reduced chi-squared = 0.8765 for 56 degrees of freedom
# Null hypothesis probability = 7.318956e-01
Photon flux (15-150 keV) in 14 sec: 0.259042 ( -0.03716 0.038396 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22298e-07 ( -4.66788e-08 5.31076e-08 ) ergs/cm2
Band function
Time interval is from -5.600 sec. to 8.400 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.07266 ( -1.6774 -1.6774 )
beta : -2.09606 ( -1.97005 0.402929 )
Epeak [keV] : 28.9246 ( -27.7644 47.2034 )
Norm@50keV : 0.232804 ( -0.23482 156.198 )
------------------------------------------------------------
# Chi-Squared = 48.56 using 59 PHA bins.
# Reduced chi-squared = 0.8830 for 55 degrees of freedom
# Null hypothesis probability = 7.174412e-01
Photon flux (15-150 keV) in 14 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] : 10.1172 (-1.5516 1.87483)
R^2/D10^2 : 0.121024 (-0.0572794 0.106104)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 56.65 using 59 PHA bins.
# Reduced chi-squared = 0.9938 for 57 degrees of freedom
# Null hypothesis probability = 4.883171e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.546e-08 9.149e-09
25- 50 8.961e-08 1.713e-08
50-150 4.837e-08 1.819e-08
15-150 1.734e-07 3.665e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.5771 (-29.8378 69.0067)
Norm : 1.25841 (-0.239597 0.306354)
------------------------------------------------------------
# Chi-Squared = 49.12 using 59 PHA bins.
# Reduced chi-squared = 0.8617 for 57 degrees of freedom
# Null hypothesis probability = 7.617548e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.570e-08 8.967e-09
25- 50 7.513e-08 1.543e-08
50-150 1.057e-07 5.981e-08
15-150 2.265e-07 7.266e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.98387 (-2.69292 3.41778)
R1^2/D10^2 : 0.564342 (-0.416706 4.44712)
kT2 [keV] : 18.3868 (-6.78574 -18.3868)
R2^2/D10^2 : 8.74609E-03 (-0.00872834 0.0538435)
------------------------------------------------------------
# Chi-Squared = 48.88 using 59 PHA bins.
# Reduced chi-squared = 0.8888 for 55 degrees of freedom
# Null hypothesis probability = 7.060917e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.567e-08 2.561e-08
25- 50 7.579e-08 3.788e-08
50-150 9.875e-08 5.818e-08
15-150 2.202e-07 1.135e-07
Peak spectrum fit
Power-law model
Time interval is from 1.400 sec. to 2.400 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90666 ( -0.46685 0.530875 )
Norm@50keV : 3.74803E-03 ( -0.00130525 0.00123842 )
------------------------------------------------------------
# Chi-Squared = 78.28 using 59 PHA bins.
# Reduced chi-squared = 1.373 for 57 degrees of freedom
# Null hypothesis probability = 3.226757e-02
Photon flux (15-150 keV) in 1 sec: 0.539408 ( -0.139519 0.139548 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44607e-08 ( -1.11073e-08 1.18641e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.400 sec. to 2.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56884 ( -2.58205 0.596945 )
Epeak [keV] : 50.7137 ( )
Norm@50keV : 5.99569E-03 ( )
------------------------------------------------------------
# Chi-Squared = 78.16 using 59 PHA bins.
# Reduced chi-squared = 1.396 for 56 degrees of freedom
# Null hypothesis probability = 2.685350e-02
Photon flux (15-150 keV) in 1 sec: 0.533685 ( -0.141465 0.14195 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2978e-08 ( -1.22075e-08 1.3065e-08 ) ergs/cm2
Band function
Time interval is from 1.400 sec. to 2.400 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.936007 ( -1.58692 1.82306 )
beta : 10.00000 ( -1.97895e+15 -1.97895e+15 )
Epeak [keV] : 2.70794 ( -2.70794 -2.70794 )
Norm@50keV : 2.09185E-19 ( -2.09185e-19 -2.09185e-19 )
------------------------------------------------------------
# Chi-Squared = 93.64 using 59 PHA bins.
# Reduced chi-squared = 1.703 for 55 degrees of freedom
# Null hypothesis probability = 8.974616e-04
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] : 8.91839 (-2.62592 4.15031)
R^2/D10^2 : 0.389229 (-0.295869 1.0974)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 81.73 using 59 PHA bins.
# Reduced chi-squared = 1.434 for 57 degrees of freedom
# Null hypothesis probability = 1.755048e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.999e-09 3.434e-09
25- 50 1.257e-08 7.497e-09
50-150 4.663e-09 3.451e-09
15-150 2.323e-08 1.265e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 73.0460 (-41.1091 -73.0456)
Norm : 2.62585 (-0.825581 1.4908)
------------------------------------------------------------
# Chi-Squared = 78.21 using 59 PHA bins.
# Reduced chi-squared = 1.372 for 57 degrees of freedom
# Null hypothesis probability = 3.264709e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.765e-09 3.277e-09
25- 50 1.089e-08 6.530e-09
50-150 1.443e-08 1.253e-08
15-150 3.208e-08 2.205e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.71932 (-2.71823 3.63468)
R1^2/D10^2 : 1.61510 (-1.351 18.9016)
kT2 [keV] : 22.3533 (-19.2752 -22.2545)
R2^2/D10^2 : 8.66653E-03 (-0.00881702 0.176188)
------------------------------------------------------------
# Chi-Squared = 77.40 using 59 PHA bins.
# Reduced chi-squared = 1.407 for 55 degrees of freedom
# Null hypothesis probability = 2.491642e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.327e-09 4.328e-09
25- 50 1.010e-08 5.905e-09
50-150 1.629e-08 1.119e-08
15-150 3.372e-08 1.875e-08
Plot creation:
Wed Nov 9 10:26:28 EST 2011