batgrbproduct Analysis for Trigger=526273
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 Jul 11 17:43:15 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger526273/GCN5_download_cron
======================================================================
Trigger: 00526273 Segment: 000
BAT Trigger Time: 363676008 [s; MET]
Trigger Stop: 363676072 [s; MET]
UTC: 2012-07-11T05:06:38.587160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 128.944711435302 Dec: -43.1773481724376 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.12
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.12
Flight Position: [ source = BAT ]
RA: 128.944711435302 Dec: -43.1773481724376 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 128.92743090052 Dec: -43.1459400297999 [deg; J2000]
{ 08h 35m 42.6s , -43d 08' 45.4" }
+/- 3.57812501706279 [arcmin] (estimated 90% radius based on SNR)
+/- 1.69189567016104 [arcmin] (formal 1-sigma fit error)
SNR: 4.92245706190133
Angular difference between Flight and Ground position is 2.030585 arcmin
Partial Coding Fraction: 0.4296875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.338561 0.255714 0.063894 0.024168
0.070267 0.072807 0.067519 0.070735 [error]
Peak 0.338561 0.255714 0.063894 0.024168
0.070267 0.072807 0.067519 0.070735 [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 9.98e-08 1.03e-07 7.48e-08 8.73e-08 3.11e-07 3.65e-07 erg/cm2
Error 3.29e-08 3.65e-08 5.00e-08 1.24e-07 1.23e-07 1.93e-07 erg/cm2
Peak flux Power-law 5.13e-02 2.95e-02 1.07e-02 5.14e-03 9.43e-02 9.67e-02 ph/cm2/s
Error 1.73e-02 1.01e-02 6.93e-03 6.83e-03 2.80e-02 2.94e-02 ph/cm2/s
Fluence Cutoff-PL 9.93e-08 1.26e-07 3.06e-08 6.32e-10 2.57e-07 0.00e+00 erg/cm2
Error 3.68e-08 5.15e-08 5.45e-08 7.95e-08 1.49e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.99e-02 3.67e-02 4.91e-03 5.56e-05 9.16e-02 9.16e-02 ph/cm2/s
Error 1.94e-02 1.43e-02 7.85e-03 3.75e-03 2.68e-02 2.68e-02 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 2.459 0.631 - - 4.92e-04 2.47e-04 66.700 57
CPL 0.130 4.466 25.2 0.0 1.92e-02 0.00e+00 64.740 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.459 0.631 - - 4.92e-04 2.47e-04 66.700 57
CPL 0.130 4.466 25.2 0.0 1.92e-02 0.00e+00 64.740 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
128.9274 -43.1459 0.0390 32.5 -65.1 0.7249 4.9 TRIG_00526273
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.45925 ( -0.555596 0.706542 )
Norm@50keV : 4.91891E-04 ( -0.000241019 0.000252315 )
------------------------------------------------------------
# Chi-Squared = 66.70 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.780165e-01
Photon flux (15-150 keV) in 64 sec: 9.42649E-02 ( -0.0279104 0.0280536 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11425e-07 ( -1.14943e-07 1.30513e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.130244 ( -7.02431 1.90787 )
Epeak [keV] : 25.1609 ( )
Norm@50keV : 1.91563E-02 ( )
------------------------------------------------------------
# Chi-Squared = 64.74 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 56 degrees of freedom
# Null hypothesis probability = 1.980046e-01
Photon flux (15-150 keV) in 64 sec: 9.15686E-02 ( -0.0265435 0.0270524 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56857e-07 ( -8.57933e-08 2.12277e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.108828 ( 0.482122 0.482122 )
beta : -9.99998 ( 132102 132112 )
Epeak [keV] : 25.1980 ( -22.7533 13.0209 )
Norm@50keV : 1.98277E-02 ( -0.0272994 38.7808 )
------------------------------------------------------------
# Chi-Squared = 64.74 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 55 degrees of freedom
# Null hypothesis probability = 1.731001e-01
Photon flux (15-150 keV) in 64 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] : 6.88286 (-1.75482 2.28562)
R^2/D10^2 : 0.203537 (-0.203537 0.486269)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.83 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 57 degrees of freedom
# Null hypothesis probability = 2.224123e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.738e-08 5.709e-08
25- 50 1.290e-07 8.077e-08
50-150 2.011e-08 1.784e-08
15-150 2.465e-07 1.457e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.4846 (-13.9147 34.9161)
Norm : 0.786850 (-0.351117 0.736933)
------------------------------------------------------------
# Chi-Squared = 65.25 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 57 degrees of freedom
# Null hypothesis probability = 2.118527e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.016e-07 5.037e-08
25- 50 1.150e-07 6.685e-08
50-150 6.153e-08 5.222e-08
15-150 2.781e-07 1.686e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.18025 (-4.02446 -4.02446)
R1^2/D10^2 : 0.512061 (-0.627025 -0.627025)
kT2 [keV] : 8.06707 (-7.81117 -7.81117)
R2^2/D10^2 : 8.24175E-02 (-0.106499 0.557266)
------------------------------------------------------------
# Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 55 degrees of freedom
# Null hypothesis probability = 1.742159e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.921e-08 5.840e-08
25- 50 1.259e-07 9.430e-08
50-150 3.017e-08 3.146e-08
15-150 2.553e-07 2.720e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.45925 ( -0.555596 0.706542 )
Norm@50keV : 4.91891E-04 ( -0.000241019 0.000252315 )
------------------------------------------------------------
# Chi-Squared = 66.70 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.780165e-01
Photon flux (15-150 keV) in 64 sec: 9.42649E-02 ( -0.0279104 0.0280536 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11425e-07 ( -1.14943e-07 1.30513e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.130244 ( -7.02431 1.90787 )
Epeak [keV] : 25.1609 ( )
Norm@50keV : 1.91563E-02 ( )
------------------------------------------------------------
# Chi-Squared = 64.74 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 56 degrees of freedom
# Null hypothesis probability = 1.980046e-01
Photon flux (15-150 keV) in 64 sec: 9.15686E-02 ( -0.0265435 0.0270524 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56857e-07 ( -8.57933e-08 2.12277e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.108828 ( 0.482122 0.482122 )
beta : -9.99998 ( 132102 132112 )
Epeak [keV] : 25.1980 ( -22.4007 13.0209 )
Norm@50keV : 1.98277E-02 ( -0.0272994 38.7921 )
------------------------------------------------------------
# Chi-Squared = 64.74 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 55 degrees of freedom
# Null hypothesis probability = 1.731001e-01
Photon flux (15-150 keV) in 64 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] : 6.88286 (-1.75482 2.28562)
R^2/D10^2 : 0.203537 (-0.203537 0.486269)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.83 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 57 degrees of freedom
# Null hypothesis probability = 2.224123e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.738e-08 5.789e-08
25- 50 1.290e-07 8.045e-08
50-150 2.011e-08 1.716e-08
15-150 2.465e-07 1.521e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.4846 (-13.9147 34.9161)
Norm : 0.786850 (-0.351117 0.736933)
------------------------------------------------------------
# Chi-Squared = 65.25 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 57 degrees of freedom
# Null hypothesis probability = 2.118527e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.016e-07 5.036e-08
25- 50 1.150e-07 6.374e-08
50-150 6.153e-08 5.235e-08
15-150 2.781e-07 1.696e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.18025 (-4.02446 -4.02446)
R1^2/D10^2 : 0.512061 (-0.627025 -0.627025)
kT2 [keV] : 8.06707 (-7.81117 -7.81117)
R2^2/D10^2 : 8.24175E-02 (-0.106499 0.557266)
------------------------------------------------------------
# Chi-Squared = 64.69 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 55 degrees of freedom
# Null hypothesis probability = 1.742159e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.921e-08 7.933e-08
25- 50 1.259e-07 1.274e-07
50-150 3.017e-08 3.696e-08
15-150 2.553e-07 2.262e-07
Plot creation:
Wed Jul 11 18:06:12 EDT 2012