batgrbproduct Analysis for Trigger=525477
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): Mon Jul 2 20:33:28 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger525477/batgroup_hand_proc
======================================================================
Trigger: 00525477 Segment: 000
BAT Trigger Time: 362821850.944 [s; MET]
Trigger Stop: 362821851.456 [s; MET]
UTC: 2012-07-01T07:50:41.566840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 80.3524070788699 Dec: -58.5615086474503 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.78
Image Trigger?: NO
Rate S/N Ratio: 11.8743420870379 [ if not an image trigger ]
Image S/N Ratio: 8.78
Flight Position: [ source = BAT ]
RA: 80.3524070788699 Dec: -58.5615086474503 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 80.3376706363955 Dec: -58.5311810415543 [deg; J2000]
{ 05h 21m 21.0s , -58d 31' 52.3" }
+/- 1.26570177184365 [arcmin] (estimated 90% radius based on SNR)
+/- 0.456882936662758 [arcmin] (formal 1-sigma fit error)
SNR: 21.7235442415779
Angular difference between Flight and Ground position is 1.877237 arcmin
Partial Coding Fraction: 0.609375 [ including projection effects ]
Duration
T90: 13.7879999279976 +/- 0.685521691838888
Measured from: 0.912000000476837
to: 14.6999999284744 [s; relative to TRIGTIME]
T50: 7.32799994945526 +/- 1.38882685668736
Measured from: 4.60399997234344
to: 11.9319999217987 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.3600000143051
to: 11.3600000143051 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0160000324249268
to: 15.4399999976158 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.370242 0.634779 0.674266 0.190596
0.032045 0.033160 0.031761 0.029182 [error]
Peak 0.025923 0.062063 0.083975 0.021890
0.008126 0.008849 0.008898 0.007728 [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 1.11e-07 2.68e-07 5.17e-07 2.45e-06 1.40e-06 3.34e-06 erg/cm2
Error 1.24e-08 1.77e-08 3.04e-08 3.40e-07 7.95e-08 3.53e-07 erg/cm2
Peak flux Power-law 2.81e-01 4.38e-01 5.12e-01 1.16e+00 1.57e+00 2.39e+00 ph/cm2/s
Error 8.49e-02 8.07e-02 6.63e-02 3.34e-01 2.11e-01 3.50e-01 ph/cm2/s
Fluence Cutoff-PL 1.05e-07 2.71e-07 5.28e-07 1.87e-06 2.78e-06 0.00e+00 erg/cm2
Error 1.58e-08 1.88e-08 3.62e-08 7.64e-07 7.61e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.47e-01 4.41e-01 5.40e-01 7.99e-01 1.55e+00 2.03e+00 ph/cm2/s
Error 1.09e-01 8.55e-02 8.94e-02 5.53e-01 2.18e-01 5.86e-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 1.052 0.096 - - 8.52e-03 4.55e-04 62.990 57
CPL 0.849 0.318 329.9 0.0 1.05e-02 3.52e-03 62.080 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.773 0.234 - - 1.36e-02 1.89e-03 65.390 57
CPL 0.357 0.844 245.2 0.0 2.02e-02 2.31e-02 64.850 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: 14.272000 sec.
T50 in the 50-300 keV band: 6.912000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 15.456 -0.016 15.440
T90 13.788 0.912 14.700
T50 7.328 4.604 11.932
Peak 1.000 10.360 11.360
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
80.3377 -58.5312 0.0089 32.7350 162.1824 1.2468863 21.724 TRIG_00525477
Foreground time interval of the image:
-0.016 10.757 (delta_t = 10.773 [sec])
Background time interval of the image:
-60.944 -0.016 (delta_t = 60.928 [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 -0.016 sec. to 15.440 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05225 ( -0.0971237 0.0957348 )
Norm@50keV : 8.51737E-03 ( -0.000455531 0.000453907 )
------------------------------------------------------------
# Chi-Squared = 62.99 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 57 degrees of freedom
# Null hypothesis probability = 2.726413e-01
Photon flux (15-150 keV) in 15.46 sec: 0.983898 ( -0.0542592 0.0543629 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39844e-06 ( -7.93543e-08 7.96549e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.016 sec. to 15.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.848973 ( -0.390312 0.245899 )
Epeak [keV] : 329.870 ( -329.87 -329.87 )
Norm@50keV : 1.04514E-02 ( -0.00224955 0.00479962 )
------------------------------------------------------------
# Chi-Squared = 62.08 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 56 degrees of freedom
# Null hypothesis probability = 2.685385e-01
Photon flux (15-150 keV) in 15.46 sec: 0.973716 ( -0.057055 0.057104 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.77829e-06 ( -6.79993e-07 8.42663e-07 ) ergs/cm2
Band function
Time interval is from -0.016 sec. to 15.440 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99998 ( -97385.9 -97385.9 )
beta : -1.07373 ( -0.111558 0.105005 )
Epeak [keV] : 24.5251 ( -24.238 6.19173 )
Norm@50keV : 668.003 ( -722.056 1.61152e+06 )
------------------------------------------------------------
# Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.247928e-01
Photon flux (15-150 keV) in 15.46 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] : 22.1795 ( )
R^2/D10^2 : 3.34370E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 119.49 using 59 PHA bins.
# Reduced chi-squared = 2.0964 for 57 degrees of freedom
# Null hypothesis probability = 2.511401e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.689e-08 5.403e-09
25- 50 2.491e-07 1.902e-08
50-150 9.157e-07 8.055e-08
15-150 1.212e-06 7.784e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 4.10463 ( )
------------------------------------------------------------
# Chi-Squared = 138.89 using 59 PHA bins.
# Reduced chi-squared = 2.4367 for 57 degrees of freedom
# Null hypothesis probability = 8.690024e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.580e-07 8.194e-08
25- 50 3.040e-07 1.577e-07
50-150 6.667e-07 3.465e-07
15-150 1.129e-06 5.842e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.02163 (-1.67305 1.95584)
R1^2/D10^2 : 0.456768 (-0.223185 0.541941)
kT2 [keV] : 33.8089 (-5.16038 8.56614)
R2^2/D10^2 : 7.78849E-03 (-0.00389818 0.00554716)
------------------------------------------------------------
# Chi-Squared = 60.14 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.948944e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.023e-07 3.237e-08
25- 50 2.736e-07 5.844e-08
50-150 1.022e-06 2.445e-07
15-150 1.397e-06 2.814e-07
Peak spectrum fit
Power-law model
Time interval is from 10.360 sec. to 11.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.773223 ( -0.240942 0.22696 )
Norm@50keV : 1.36470E-02 ( -0.00191225 0.00187402 )
------------------------------------------------------------
# Chi-Squared = 65.39 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.083909e-01
Photon flux (15-150 keV) in 1 sec: 1.57020 ( -0.210454 0.211571 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.61299e-07 ( -2.15592e-08 2.16387e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.360 sec. to 11.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.357105 ( -1.1661 0.521111 )
Epeak [keV] : 245.175 ( -245.18 -245.18 )
Norm@50keV : 2.01961E-02 ( -0.00908329 0.0371071 )
------------------------------------------------------------
# Chi-Squared = 64.85 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 56 degrees of freedom
# Null hypothesis probability = 1.953174e-01
Photon flux (15-150 keV) in 1 sec: 1.54632 ( -0.21704 0.21805 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.594e-07 ( -2.274e-08 2.2324e-08 ) ergs/cm2
Band function
Time interval is from 10.360 sec. to 11.360 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.792792 ( 0.792792 0.792792 )
beta : -0.773224 ( -0.226961 0.240821 )
Epeak [keV] : 20.0101 ( -20.0101 -20.0101 )
Norm@50keV : 1.83542E-02 ( -0.00656416 0 )
------------------------------------------------------------
# Chi-Squared = 65.39 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 55 degrees of freedom
# Null hypothesis probability = 1.593734e-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] : 26.1196 (-4.30748 5.90567)
R^2/D10^2 : 3.54440E-02 (-0.0160132 0.0259651)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 70.17 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 57 degrees of freedom
# Null hypothesis probability = 1.129678e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.102e-09 1.152e-09
25- 50 2.379e-08 5.590e-09
50-150 1.194e-07 2.629e-08
15-150 1.473e-07 3.311e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 6.29482 (-6.29482 -6.29482)
------------------------------------------------------------
# Chi-Squared = 96.50 using 59 PHA bins.
# Reduced chi-squared = 1.693 for 57 degrees of freedom
# Null hypothesis probability = 8.452354e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.567e-08 8.605e-09
25- 50 3.015e-08 1.643e-08
50-150 6.612e-08 3.632e-08
15-150 1.119e-07 6.075e-08
Double BB
R1^2/D10^2 : 1.94369E+14 ( )
kT2 [keV] : 26.5407 (-4.40106 6.08167)
R2^2/D10^2 : 3.36370E-02 (-0.015274 0.0211039)
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Chi-Squared = 67.14 using 59 PHA bins.
# Chi-Squared = 67.13 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.246875e-01
# Null hypothesis probability = 1.262682e-01
# Null hypothesis probability = 1.264462e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.744e-09 1.821e-09
25- 50 2.271e-08 5.445e-09
50-150 1.212e-07 2.880e-08
15-150 1.506e-07 3.303e-08
Plot creation:
Mon Jul 2 20:46:29 EDT 2012