batgrbproduct Analysis for Trigger=526642
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 Jul 15 16:41:27 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger526642/GCN5_download_cron
======================================================================
Trigger: 00526642 Segment: 000
BAT Trigger Time: 363993536 [s; MET]
Trigger Stop: 363993600 [s; MET]
UTC: 2012-07-14T21:18:46.573920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 355.432702280664 Dec: -46.1858043791775 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.3
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.3
Flight Position: [ source = BAT ]
RA: 355.432702280664 Dec: -46.1858043791775 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 355.41199957721 Dec: -46.1964637936678 [deg; J2000]
{ 23h 41m 38.9s , -46d 11' 47.3" }
+/- 2.5827265387161 [arcmin] (estimated 90% radius based on SNR)
+/- 1.09359332099179 [arcmin] (formal 1-sigma fit error)
SNR: 7.84214585645284
Angular difference between Flight and Ground position is 1.071662 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 159.183999896049 +/- 33.771481782035
Measured from: -20.015999853611
to: 139.168000042439 [s; relative to TRIGTIME]
T50: 54.5799999833107 +/- 51.4724829508665
Measured from: -4.47599989175797
to: 50.1040000915527 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -21.7080000042915
to: -20.7080000042915 [s; relative to TRIGTIME]
Total Fluence
Measured from: -23.0080000162125
to: 153.991999983788 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.571732 0.873053 0.566890 0.020624
0.069056 0.071234 0.062204 0.053052 [error]
Peak 0.018588 0.016136 0.010801 0.001929
0.005267 0.005410 0.004733 0.004130 [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 1.70e-07 3.09e-07 4.30e-07 1.25e-06 1.24e-06 2.16e-06 erg/cm2
Error 2.64e-08 3.07e-08 5.84e-08 3.52e-07 1.41e-07 4.03e-07 erg/cm2
Peak flux Power-law 1.52e-01 1.22e-01 6.66e-02 5.30e-02 3.65e-01 3.94e-01 ph/cm2/s
Error 7.19e-02 4.07e-02 3.94e-02 7.12e-02 1.20e-01 1.37e-01 ph/cm2/s
Fluence Cutoff-PL 1.54e-07 3.41e-07 4.37e-07 3.70e-07 1.30e-06 0.00e+00 erg/cm2
Error 3.01e-08 4.12e-08 6.65e-08 4.39e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.52e-01 1.22e-01 6.65e-02 5.24e-02 3.65e-01 3.93e-01 ph/cm2/s
Error 7.17e-02 4.47e-02 5.36e-02 7.07e-02 1.20e-01 1.05e-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 1.522 0.166 - - 7.46e-04 7.71e-05 52.650 57
CPL 0.686 0.759 72.5 64.5 2.10e-03 2.47e-03 48.200 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.878 0.723 - - 2.57e-03 1.15e-03 46.700 57
CPL 1.890 1.250 9999.3 0.0 2.55e-03 0.00e+00 46.700 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: 32.768000 sec.
T50 in the 50-300 keV band: 20.672000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 177.000 -23.008 153.992
T90 159.184 -20.016 139.168
T50 54.580 -4.476 50.104
Peak 1.000 -21.708 -20.708
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
355.4120 -46.1965 0.0245 10.8 106.8 1.4115 7.8 TRIG_00526642
------------------------------------------
Foreground time interval of the image:
-23.008 71.601 (delta_t = 94.609 [sec])
Background time interval of the image:
-60.000 -23.008 (delta_t = 36.992 [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
-23.008000 116.160000
118.000000 153.992000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52212 ( -0.164762 0.167059 )
Norm@50keV : 7.45707E-04 ( -7.74586e-05 7.68165e-05 )
------------------------------------------------------------
# Chi-Squared = 52.65 using 59 PHA bins.
# Reduced chi-squared = 0.9237 for 57 degrees of freedom
# Null hypothesis probability = 6.388445e-01
Photon flux (15-150 keV) in 175.2 sec: 9.36581E-02 ( -0.00919326 0.00919778 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23504e-06 ( -1.40218e-07 1.42248e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-23.008000 116.160000
118.000000 153.992000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.685890 ( -0.830574 0.688128 )
Epeak [keV] : 72.5243 ( -17.6746 111.364 )
Norm@50keV : 2.10251E-03 ( -0.00118854 0.00374845 )
------------------------------------------------------------
# Chi-Squared = 48.20 using 59 PHA bins.
# Reduced chi-squared = 0.8606 for 56 degrees of freedom
# Null hypothesis probability = 7.614396e-01
Photon flux (15-150 keV) in 175.2 sec: 9.06299E-02 ( -0.0095219 0.0095201 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30066e-06 ( -2.73305e-07 6.05572e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-23.008000 116.160000
118.000000 153.992000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.685872 ( -0.614895 0.711732 )
beta : -10.00000 ( 4.70238e+11 4.70238e+11 )
Epeak [keV] : 72.5105 ( -17.673 111.349 )
Norm@50keV : 2.10256E-03 ( -0.00118922 0.00375203 )
------------------------------------------------------------
# Chi-Squared = 48.20 using 59 PHA bins.
# Reduced chi-squared = 0.8763 for 55 degrees of freedom
# Null hypothesis probability = 7.301679e-01
Photon flux (15-150 keV) in 175.2 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] : 13.2897 (-1.52727 1.78092)
R^2/D10^2 : 1.64500E-02 (-0.00594148 0.0089875)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 62.23 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 57 degrees of freedom
# Null hypothesis probability = 2.955236e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.079e-07 1.905e-08
25- 50 3.804e-07 5.019e-08
50-150 4.302e-07 9.014e-08
15-150 9.186e-07 1.215e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 194.560 (5.66534 -111.724)
Norm : 0.384208 (-0.0376183 0.0410665)
------------------------------------------------------------
# Chi-Squared = 49.97 using 59 PHA bins.
# Reduced chi-squared = 0.8767 for 57 degrees of freedom
# Null hypothesis probability = 7.338510e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.681e-07 9.110e-08
25- 50 3.225e-07 1.725e-07
50-150 7.016e-07 3.742e-07
15-150 1.192e-06 6.366e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.03744 (-2.2804 2.46616)
R1^2/D10^2 : 6.29003E-02 (-0.0338912 0.0589313)
kT2 [keV] : 25.7112 (-7.77756 25.1375)
R2^2/D10^2 : 1.07333E-03 (-0.000941478 0.00342957)
------------------------------------------------------------
# Chi-Squared = 46.32 using 59 PHA bins.
# Reduced chi-squared = 0.8421 for 55 degrees of freedom
# Null hypothesis probability = 7.915099e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.505e-07 7.937e-08
25- 50 3.503e-07 1.626e-07
50-150 6.580e-07 3.603e-07
15-150 1.159e-06 6.049e-07
Peak spectrum fit
Power-law model
Time interval is from -21.708 sec. to -20.708 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87820 ( -0.655611 0.791065 )
Norm@50keV : 2.56649E-03 ( -0.00121045 0.00109301 )
------------------------------------------------------------
# Chi-Squared = 46.70 using 59 PHA bins.
# Reduced chi-squared = 0.8192 for 57 degrees of freedom
# Null hypothesis probability = 8.331593e-01
Photon flux (15-150 keV) in 1 sec: 0.364956 ( -0.11973 0.119792 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35936e-08 ( -9.94631e-09 1.09275e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.708 sec. to -20.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88994 ( -1.71781 0.782973 )
Epeak [keV] : 9999.29 ( )
Norm@50keV : 2.55302E-03 ( )
------------------------------------------------------------
# Chi-Squared = 46.70 using 59 PHA bins.
# Reduced chi-squared = 0.8339 for 56 degrees of freedom
# Null hypothesis probability = 8.075904e-01
Photon flux (15-150 keV) in 1 sec: 0.364747 ( -0.119457 0.119803 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.39326e-08 ( -1.81865e-08 3.12718e-08 ) ergs/cm2
Band function
Time interval is from -21.708 sec. to -20.708 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.00925 ( 1.13513 1.13513 )
beta : -1.94268 ( 1.89442 0.669134 )
Epeak [keV] : 19.6295 ( -25.7081 -25.7081 )
Norm@50keV : 270.737 ( -279.431 495.51 )
------------------------------------------------------------
# Chi-Squared = 46.61 using 59 PHA bins.
# Reduced chi-squared = 0.8475 for 55 degrees of freedom
# Null hypothesis probability = 7.823251e-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] : 8.30796 (-3.49146 6.67831)
R^2/D10^2 : 0.327251 (-0.322545 2.51293)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.62 using 59 PHA bins.
# Reduced chi-squared = 0.8880 for 57 degrees of freedom
# Null hypothesis probability = 7.118198e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.195e-09 2.594e-09
25- 50 7.831e-09 5.020e-09
50-150 2.325e-09 1.774e-09
15-150 1.435e-08 9.650e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 85.9600 (-86.1069 -86.1069)
Norm : 1.66357 (-0.650673 1.66542)
------------------------------------------------------------
# Chi-Squared = 47.33 using 59 PHA bins.
# Reduced chi-squared = 0.8303 for 57 degrees of freedom
# Null hypothesis probability = 8.158714e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.333e-09 2.661e-09
25- 50 7.254e-09 4.665e-09
50-150 1.073e-08 9.065e-09
15-150 2.232e-08 1.552e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.53432 (-2.86763 4.54211)
R1^2/D10^2 : 1.37827 (-1.24105 32.0079)
kT2 [keV] : 39.2081 (-38.9108 -39.2579)
R2^2/D10^2 : 1.23946E-03 (-0.00121761 0.0988078)
------------------------------------------------------------
# Chi-Squared = 46.06 using 59 PHA bins.
# Reduced chi-squared = 0.8375 for 55 degrees of freedom
# Null hypothesis probability = 7.992000e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.197e-09 3.358e-09
25- 50 5.808e-09 3.268e-09
50-150 1.604e-08 1.023e-08
15-150 2.704e-08 1.370e-08
Plot creation:
Sun Jul 15 16:48:28 EDT 2012