batgrbproduct Analysis for Trigger=526593
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 13:13:03 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger526593/GCN5_download_cron
======================================================================
Trigger: 00526593 Segment: 000
BAT Trigger Time: 363944816.192 [s; MET]
Trigger Stop: 363944818.24 [s; MET]
UTC: 2012-07-14T07:46:46.767960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 167.96954977866 Dec: -30.6319671895596 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.2
Image Trigger?: NO
Rate S/N Ratio: 15.2315462117278 [ if not an image trigger ]
Image S/N Ratio: 10.2
Flight Position: [ source = BAT ]
RA: 167.96954977866 Dec: -30.6319671895596 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 167.975347611889 Dec: -30.6249381166421 [deg; J2000]
{ 11h 11m 54.1s , -30d 37' 29.8" }
+/- 1.63374209005486 [arcmin] (estimated 90% radius based on SNR)
+/- 0.509611837205534 [arcmin] (formal 1-sigma fit error)
SNR: 15.0858757279447
Angular difference between Flight and Ground position is 0.517177 arcmin
Partial Coding Fraction: 0.4023438 [ including projection effects ]
Duration
T90: 16.1959999203682 +/- 2.9978425836007
Measured from: -0.191999852657318
to: 16.0040000677109 [s; relative to TRIGTIME]
T50: 5.85999995470047 +/- 1.39281727207283
Measured from: 1.77600014209747
to: 7.63600009679794 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.58000004291534
to: 4.58000004291534 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.736000001430511
to: 17.7840000391006 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.342216 0.518181 0.351536 0.044780
0.039955 0.041671 0.036732 0.031836 [error]
Peak 0.042500 0.067825 0.045437 0.015632
0.009956 0.010290 0.009312 0.007772 [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 1.26e-07 2.15e-07 2.79e-07 7.31e-07 8.19e-07 1.35e-06 erg/cm2
Error 1.90e-08 2.06e-08 3.60e-08 1.96e-07 8.65e-08 2.27e-07 erg/cm2
Peak flux Power-law 5.39e-01 4.87e-01 3.03e-01 2.88e-01 1.45e+00 1.62e+00 ph/cm2/s
Error 1.55e-01 8.99e-02 6.97e-02 1.30e-01 2.64e-01 2.85e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 5.39e-01 4.87e-01 3.03e-01 1.04e-01 1.45e+00 1.62e+00 ph/cm2/s
Error 1.66e-01 9.10e-02 1.86e-01 2.64e-01 3.11e-01 0.00e+00 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 4.32e-01 1.39e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 3.08e-01 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 1.624 0.160 - - 5.09e-03 5.02e-04 62.210 57
CPL 1.001 0.661 77.2 273.6 1.08e-02 9.81e-03 59.160 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.682 0.298 - - 1.10e-02 2.03e-03 45.920 57
CPL 1.622 1.345 330.9 0.0 1.18e-02 0.00e+00 45.930 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: 8.384000 sec.
T50 in the 50-300 keV band: 4.544000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.520 -0.736 17.784
T90 16.196 -0.192 16.004
T50 5.860 1.776 7.636
Peak 1.000 3.580 4.580
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
167.9753 -30.6249 0.0127 37.5 -51.2 1.3810 15.1 TRIG_00526593
------------------------------------------
Foreground time interval of the image:
-0.736 11.558 (delta_t = 12.294 [sec])
12.808 17.784 (delta_t = 4.976 [sec])
Background time interval of the image:
-60.192 -57.471 (delta_t = 2.721 [sec])
-56.192 -0.736 (delta_t = 55.456 [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
-0.736000 11.558000
12.808000 17.784000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62357 ( -0.158959 0.161564 )
Norm@50keV : 5.08546E-03 ( -0.000503812 0.000499859 )
------------------------------------------------------------
# Chi-Squared = 62.21 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.959876e-01
Photon flux (15-150 keV) in 17.27 sec: 0.658367 ( -0.0628426 0.0629234 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.19104e-07 ( -8.60996e-08 8.6918e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.736000 11.558000
12.808000 17.784000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00109 ( -0.711783 0.611026 )
Epeak [keV] : 77.1794 ( -20.5982 526.645 )
Norm@50keV : 1.07563E-02 ( -0.00549844 0.0141315 )
------------------------------------------------------------
# Chi-Squared = 59.16 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 56 degrees of freedom
# Null hypothesis probability = 3.608878e-01
Photon flux (15-150 keV) in 17.27 sec: 0.642271 ( -0.064878 0.064866 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.736000 11.558000
12.808000 17.784000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00105 ( -0.564517 0.787286 )
beta : -10.00000 ( 1.62815e+06 1.62816e+06 )
Epeak [keV] : 77.1645 ( -20.5953 526.625 )
Norm@50keV : 1.07560E-02 ( -0.00549943 0.0141391 )
------------------------------------------------------------
# Chi-Squared = 59.16 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.261884e-01
Photon flux (15-150 keV) in 17.27 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] : 13.6429 (-1.58953 1.82365)
R^2/D10^2 : 0.102493 (-0.0371764 0.0579766)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 81.88 using 59 PHA bins.
# Reduced chi-squared = 1.437 for 57 degrees of freedom
# Null hypothesis probability = 1.706596e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.974e-08 1.290e-08
25- 50 2.527e-07 3.204e-08
50-150 3.055e-07 6.010e-08
15-150 6.280e-07 8.488e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 155.176 (0.676514 -101.177)
Norm : 2.73046 (-0.28317 0.334775)
------------------------------------------------------------
# Chi-Squared = 59.64 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 57 degrees of freedom
# Null hypothesis probability = 3.797739e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.208e-07 1.687e-08
25- 50 2.249e-07 2.383e-08
50-150 4.501e-07 6.822e-08
15-150 7.958e-07 8.376e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.82732 (-1.69876 1.95631)
R1^2/D10^2 : 0.765021 (-0.428036 0.764743)
kT2 [keV] : 23.2239 (-5.05127 9.54277)
R2^2/D10^2 : 1.14644E-02 (-0.00825089 0.0116621)
------------------------------------------------------------
# Chi-Squared = 57.18 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 55 degrees of freedom
# Null hypothesis probability = 3.940512e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.156e-07 5.345e-08
25- 50 2.307e-07 8.704e-08
50-150 4.421e-07 2.272e-07
15-150 7.884e-07 3.053e-07
Peak spectrum fit
Power-law model
Time interval is from 3.580 sec. to 4.580 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68226 ( -0.288543 0.307596 )
Norm@50keV : 1.09869E-02 ( -0.00204505 0.00201003 )
------------------------------------------------------------
# Chi-Squared = 45.92 using 59 PHA bins.
# Reduced chi-squared = 0.8055 for 57 degrees of freedom
# Null hypothesis probability = 8.533102e-01
Photon flux (15-150 keV) in 1 sec: 1.45027 ( -0.263587 0.264144 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01875e-07 ( -1.96193e-08 1.9706e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.580 sec. to 4.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62170 ( -0.971618 1.7181 )
Epeak [keV] : 330.870 ( )
Norm@50keV : 1.17731E-02 ( )
------------------------------------------------------------
# Chi-Squared = 45.93 using 59 PHA bins.
# Reduced chi-squared = 0.8202 for 56 degrees of freedom
# Null hypothesis probability = 8.292857e-01
Photon flux (15-150 keV) in 1 sec: 1.45026 ( -0.26482 0.26351 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00303e-07 ( -3.01508e-08 8.928e-08 ) ergs/cm2
Band function
Time interval is from 3.580 sec. to 4.580 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.27902 ( 1.29274 6.07622 )
beta : -1.71683 ( 1.71946 0.325766 )
Epeak [keV] : 59.2077 ( -61.2266 -61.2266 )
Norm@50keV : 1.99278E-02 ( -0.00974667 442.803 )
------------------------------------------------------------
# Chi-Squared = 45.91 using 59 PHA bins.
# Reduced chi-squared = 0.8347 for 55 degrees of freedom
# Null hypothesis probability = 8.037562e-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] : 12.5530 (-3.39186 6.26436)
R^2/D10^2 : 0.290964 (-0.285167 0.622658)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 60.68 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 57 degrees of freedom
# Null hypothesis probability = 3.445447e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.722e-09 3.615e-09
25- 50 3.222e-08 1.110e-08
50-150 3.143e-08 1.221e-08
15-150 7.337e-08 2.422e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 161.019 (-21.0004 -101.424)
Norm : 5.94851 (-1.14224 1.4311)
------------------------------------------------------------
# Chi-Squared = 46.44 using 59 PHA bins.
# Reduced chi-squared = 0.8148 for 57 degrees of freedom
# Null hypothesis probability = 8.398546e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.518e-08 3.585e-09
25- 50 2.842e-08 5.605e-09
50-150 5.772e-08 1.212e-08
15-150 1.013e-07 1.936e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.94629 (-2.24287 2.67238)
R1^2/D10^2 : 1.91171 (-1.32937 6.62579)
kT2 [keV] : 30.7825 (-9.78043 31.6118)
R2^2/D10^2 : 9.43994E-03 (-0.00842407 0.0183488)
------------------------------------------------------------
# Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.8190 for 55 degrees of freedom
# Null hypothesis probability = 8.285599e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.608e-08 9.161e-09
25- 50 2.842e-08 1.565e-08
50-150 6.006e-08 3.547e-08
15-150 1.046e-07 5.436e-08
Plot creation:
Sun Jul 15 13:17:53 EDT 2012