batgrbproduct Analysis for Trigger=528925
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): Sat Jul 28 09:27:53 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger528925/GCN5_download_cron
======================================================================
Trigger: 00528925 Segment: 000
BAT Trigger Time: 365120696 [s; MET]
Trigger Stop: 365120760 [s; MET]
UTC: 2012-07-27T22:24:46.526980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 186.546838617747 Dec: 18.0664344663366 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.86
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.86
Flight Position: [ source = BAT ]
RA: 186.546838617747 Dec: 18.0664344663366 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 186.505279194293 Dec: 18.028997769326 [deg; J2000]
{ 12h 26m 01.3s , +18d 01' 44.4" }
+/- 3.86197761148692 [arcmin] (estimated 90% radius based on SNR)
+/- 2.67459315699487 [arcmin] (formal 1-sigma fit error)
SNR: 4.41386183568589
Angular difference between Flight and Ground position is 3.265959 arcmin
Partial Coding Fraction: 0.8984375 [ 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 0.083485 0.158431 -0.021570 0.010693
0.040560 0.042083 0.038000 0.035869 [error]
Peak 0.083485 0.158431 -0.021570 0.010693
0.040560 0.042083 0.038000 0.035869 [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 2.98e-08 3.65e-08 3.23e-08 4.91e-08 1.16e-07 1.51e-07 erg/cm2
Error 1.67e-08 1.90e-08 3.15e-08 8.84e-08 6.93e-08 1.25e-07 erg/cm2
Peak flux Power-law 1.53e-02 1.03e-02 4.57e-03 2.79e-03 3.16e-02 3.30e-02 ph/cm2/s
Error 8.66e-03 5.28e-03 4.38e-03 4.61e-03 1.54e-02 1.65e-02 ph/cm2/s
Fluence Cutoff-PL 2.01e-08 6.94e-08 1.09e-08 6.43e-12 1.00e-07 0.00e+00 erg/cm2
Error 2.08e-08 3.09e-08 2.13e-08 2.38e-09 4.59e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 9.48e-03 1.97e-02 1.86e-03 5.95e-07 3.10e-02 3.10e-02 ph/cm2/s
Error 1.03e-02 8.57e-03 3.28e-03 1.97e-04 1.40e-02 1.40e-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 2.155 0.873 - - 1.96e-04 1.27e-04 69.310 57
CPL -9.240 0.000 34.2 7.8 2.64e+03 0.00e+00 63.740 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.155 0.873 - - 1.96e-04 1.27e-04 69.310 57
CPL -9.240 0.000 34.2 7.8 2.64e+03 0.00e+00 63.740 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
186.5053 +18.0290 0.0437 26.5 -12.7 0.3690 4.4 TRIG_00528925
------------------------------------------
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: 2.15513 ( -0.768582 0.977415 )
Norm@50keV : 1.95553E-04 ( -0.000125127 0.000128383 )
------------------------------------------------------------
# Chi-Squared = 69.31 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.269898e-01
Photon flux (15-150 keV) in 64 sec: 3.15819E-02 ( -0.0154192 0.0154709 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15773e-07 ( -6.40294e-08 7.45594e-08 ) 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: -9.23981 ( )
Epeak [keV] : 34.2483 ( -7.60977 8.02753 )
Norm@50keV : 2641.15 ( )
------------------------------------------------------------
# Chi-Squared = 63.74 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 56 degrees of freedom
# Null hypothesis probability = 2.229138e-01
Photon flux (15-150 keV) in 64 sec: 3.10111E-02 ( -0.0134031 0.0145296 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00457e-07 ( -4.29747e-08 4.88077e-08 ) 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 : 4.94455 ( -46.434 -36.4355 )
beta : -9.99894 ( 2988.01 2998.01 )
Epeak [keV] : 34.8955 ( -7.70279 9.12374 )
Norm@50keV : 5.47955 ( -5.49995 37.5553 )
------------------------------------------------------------
# Chi-Squared = 63.67 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 55 degrees of freedom
# Null hypothesis probability = 1.978281e-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] : 8.79237 (-2.49123 3.311)
R^2/D10^2 : 2.99483E-02 (-0.0297395 0.074668)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 57 degrees of freedom
# Null hypothesis probability = 2.270739e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.849e-08 1.847e-08
25- 50 5.836e-08 3.763e-08
50-150 2.072e-08 1.828e-08
15-150 1.076e-07 6.970e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.3038 (-23.2538 117.355)
Norm : 0.218745 (-0.123031 0.24004)
------------------------------------------------------------
# Chi-Squared = 67.72 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.564475e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.196e-08 2.011e-08
25- 50 4.172e-08 2.827e-08
50-150 3.166e-08 3.197e-08
15-150 1.053e-07 7.706e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.92510 (-8.831 -8.831)
R1^2/D10^2 : 1.24690E-03 (-0.00126711 -0.00126711)
kT2 [keV] : 8.82471 (-8.82008 16.024)
R2^2/D10^2 : 2.82542E-02 (-0.0283247 -0.0283247)
------------------------------------------------------------
# Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.751810e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.836e-08 1.107e+00
25- 50 5.849e-08 1.052e+01
50-150 2.103e-08 2.868e+02
15-150 1.079e-07 2.688e+02
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: 2.15513 ( -0.768582 0.977415 )
Norm@50keV : 1.95553E-04 ( -0.000125127 0.000128383 )
------------------------------------------------------------
# Chi-Squared = 69.31 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 57 degrees of freedom
# Null hypothesis probability = 1.269898e-01
Photon flux (15-150 keV) in 64 sec: 3.15819E-02 ( -0.0154192 0.0154709 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15773e-07 ( -6.40294e-08 7.45594e-08 ) 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: -9.23981 ( )
Epeak [keV] : 34.2483 ( -7.60977 8.02753 )
Norm@50keV : 2641.15 ( )
------------------------------------------------------------
# Chi-Squared = 63.74 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 56 degrees of freedom
# Null hypothesis probability = 2.229138e-01
Photon flux (15-150 keV) in 64 sec: 3.10111E-02 ( -0.0134031 0.0145296 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00457e-07 ( -4.29747e-08 4.88077e-08 ) 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 : 4.94455 ( -46.4335 -36.4355 )
beta : -9.99894 ( 2988.01 2998.01 )
Epeak [keV] : 34.8955 ( -7.70279 9.12374 )
Norm@50keV : 5.47955 ( -5.49995 37.5553 )
------------------------------------------------------------
# Chi-Squared = 63.67 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 55 degrees of freedom
# Null hypothesis probability = 1.978281e-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] : 8.79237 (-2.49123 3.311)
R^2/D10^2 : 2.99483E-02 (-0.0297395 0.074668)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 57 degrees of freedom
# Null hypothesis probability = 2.270739e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.849e-08 1.848e-08
25- 50 5.836e-08 3.843e-08
50-150 2.072e-08 1.730e-08
15-150 1.076e-07 6.774e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.3038 (-23.2538 117.355)
Norm : 0.218745 (-0.123031 0.24004)
------------------------------------------------------------
# Chi-Squared = 67.72 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.564475e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.196e-08 2.017e-08
25- 50 4.172e-08 2.838e-08
50-150 3.166e-08 3.160e-08
15-150 1.053e-07 7.568e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.92510 (-8.831 -8.831)
R1^2/D10^2 : 1.24690E-03 (-0.00126711 -0.00126711)
kT2 [keV] : 8.82471 (-8.82008 16.024)
R2^2/D10^2 : 2.82542E-02 (-0.0283247 -0.0283247)
------------------------------------------------------------
# Chi-Squared = 64.65 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 55 degrees of freedom
# Null hypothesis probability = 1.751810e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.836e-08 1.293e+00
25- 50 5.849e-08 1.028e+01
50-150 2.103e-08 2.628e+02
15-150 1.079e-07 2.756e+02
Plot creation:
Sat Jul 28 09:48:04 EDT 2012