batgrbproduct Analysis for Trigger=421814
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Thu May 13 22:47:46 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger421814/GCN5_download_cron
======================================================================
Trigger: 00421814 Segment: 000
BAT Trigger Time: 295409234.56 [s; MET]
Trigger Stop: 295409246.72 [s; MET]
UTC: 2010-05-13T02:07:08.767460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 169.57995036142 Dec: 3.60539838785235 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.4
Image Trigger?: NO
Rate S/N Ratio: 10.8627804912002 [ if not an image trigger ]
Image S/N Ratio: 10.4
Flight Position: [ source = BAT ]
RA: 169.57995036142 Dec: 3.60539838785235 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 169.601916029067 Dec: 3.6106060234992 [deg; J2000]
{ 11h 18m 24.5s , +03d 36' 38.2" }
+/- 1.3867097095043 [arcmin] (estimated 90% radius based on SNR)
+/- 0.617858638013318 [arcmin] (formal 1-sigma fit error)
SNR: 19.0669782348437
Angular difference between Flight and Ground position is 1.351931 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 72.4719999432564 +/- 14.8708607591715
Measured from: -32.4919998645782
to: 39.9800000786781 [s; relative to TRIGTIME]
T50: 24.8599998950958 +/- 6.63077976956865
Measured from: -5.0479998588562
to: 19.8120000362396 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.08799999952316
to: 2.08799999952316 [s; relative to TRIGTIME]
Total Fluence
Measured from: -46.0479999780655
to: 44.5640000104904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.649910 0.868573 0.539763 0.100630
0.053028 0.055238 0.049109 0.043634 [error]
Peak 0.013396 0.032300 0.019282 0.007458
0.005812 0.006255 0.005433 0.004683 [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 2.03e-07 3.47e-07 4.51e-07 1.19e-06 1.33e-06 2.19e-06 erg/cm2
Error 2.46e-08 2.60e-08 4.82e-08 2.68e-07 1.14e-07 3.09e-07 erg/cm2
Peak flux Power-law 1.62e-01 1.85e-01 1.51e-01 2.07e-01 5.74e-01 7.06e-01 ph/cm2/s
Error 7.14e-02 5.04e-02 4.39e-02 1.29e-01 1.41e-01 1.79e-01 ph/cm2/s
Fluence Cutoff-PL 1.72e-07 3.02e-07 3.89e-07 8.16e-07 1.13e-06 1.67e-06 erg/cm2
Error 2.53e-08 2.90e-08 2.58e-08 1.17e-07 4.93e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.62e-01 1.85e-01 1.51e-01 2.06e-01 5.74e-01 7.04e-01 ph/cm2/s
Error 7.14e-02 5.04e-02 4.39e-02 1.28e-01 1.41e-01 1.78e-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 1.620 0.134 - - 1.57e-03 1.24e-04 45.670 57
CPL 1.364 0.437 115.6 0.0 2.14e-03 0.00e+00 45.550 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.289 0.430 - - 4.82e-03 1.16e-03 45.560 57
CPL 1.253 0.000 939.1 0.0 5.01e-03 0.00e+00 45.580 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: 52.672000 sec.
T50 in the 50-300 keV band: 27.968000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 90.612 -46.048 44.564
T90 72.472 -32.492 39.980
T50 24.860 -5.048 19.812
Peak 1.000 1.088 2.088
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
169.6019 +3.6106 0.0101 24.0 174.2 2.3177 19.1 TRIG_00421814
------------------------------------------
Foreground time interval of the image:
-46.048 44.564 (delta_t = 90.612 [sec])
Background time interval of the image:
-239.560 -46.048 (delta_t = 193.512 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 -46.048 sec. to 44.564 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62002 ( -0.133461 0.13534 )
Norm@50keV : 1.56780E-03 ( -0.000124526 0.000123392 )
------------------------------------------------------------
# Chi-Squared = 45.67 using 59 PHA bins.
# Reduced chi-squared = 0.8012 for 57 degrees of freedom
# Null hypothesis probability = 8.593349e-01
Photon flux (15-150 keV) in 90.61 sec: 0.202739 ( -0.0151177 0.0151297 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32543e-06 ( -1.131e-07 1.14295e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -46.048 sec. to 44.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36436 ( -0.494976 0.379453 )
Epeak [keV] : 115.596 ( )
Norm@50keV : 2.13648E-03 ( )
------------------------------------------------------------
# Chi-Squared = 45.55 using 59 PHA bins.
# Reduced chi-squared = 0.8135 for 56 degrees of freedom
# Null hypothesis probability = 8.394025e-01
Photon flux (15-150 keV) in 90.61 sec: 0.173069 ( -0.014466 0.014221 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12535e-06 ( -1.21254e-07 1.12701e-07 ) ergs/cm2
Band function
Time interval is from -46.048 sec. to 44.564 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.05087 ( 1.04827 1.04827 )
beta : -1.77320 ( 1.77411 0.245741 )
Epeak [keV] : 64.2808 ( -63.8452 -63.8452 )
Norm@50keV : 3.41470E-03 ( -0.00346526 118.948 )
------------------------------------------------------------
# Chi-Squared = 44.24 using 59 PHA bins.
# Reduced chi-squared = 0.8043 for 55 degrees of freedom
# Null hypothesis probability = 8.502155e-01
Photon flux (15-150 keV) in 90.61 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] : 12.5957 (-1.1432 1.30048)
R^2/D10^2 : 4.11080E-02 (-0.0123265 0.0170617)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 84.93 using 59 PHA bins.
# Reduced chi-squared = 1.490 for 57 degrees of freedom
# Null hypothesis probability = 9.618493e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.253e-07 1.595e-08
25- 50 4.169e-07 3.815e-08
50-150 4.103e-07 7.090e-08
15-150 9.525e-07 9.387e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 160.295 (8.93858 -101.39)
Norm : 0.831946 (-0.068113 0.0783089)
------------------------------------------------------------
# Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8020 for 57 degrees of freedom
# Null hypothesis probability = 8.582921e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.925e-07 1.957e-08
25- 50 3.601e-07 2.736e-08
50-150 7.300e-07 1.198e-07
15-150 1.283e-06 1.468e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.82076 (-1.49686 2.02153)
R1^2/D10^2 : 0.120284 (-0.0707952 0.122139)
kT2 [keV] : 46.7254 (-12.4366 90.4462)
R2^2/D10^2 : 3.53296E-04 ( )
------------------------------------------------------------
# Chi-Squared = 45.30 using 59 PHA bins.
# Chi-Squared = 45.23 using 59 PHA bins.
# Reduced chi-squared = 0.8236 for 55 degrees of freedom
# Reduced chi-squared = 0.8224 for 55 degrees of freedom
# Null hypothesis probability = 8.215356e-01
# Null hypothesis probability = 8.233657e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.770e-07 3.855e-08
25- 50 3.852e-07 9.170e-08
50-150 7.592e-07 4.131e-07
15-150 1.321e-06 5.033e-07
Peak spectrum fit
Power-law model
Time interval is from 1.088 sec. to 2.088 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28920 ( -0.437442 0.42179 )
Norm@50keV : 4.81870E-03 ( -0.00116415 0.00116067 )
------------------------------------------------------------
# Chi-Squared = 45.56 using 59 PHA bins.
# Reduced chi-squared = 0.7993 for 57 degrees of freedom
# Null hypothesis probability = 8.619886e-01
Photon flux (15-150 keV) in 1 sec: 0.573756 ( -0.140662 0.14105 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.77447e-08 ( -1.27962e-08 1.30438e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.088 sec. to 2.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25334 ( )
Epeak [keV] : 939.063 ( )
Norm@50keV : 5.00678E-03 ( )
------------------------------------------------------------
# Chi-Squared = 45.58 using 59 PHA bins.
# Reduced chi-squared = 0.8139 for 56 degrees of freedom
# Null hypothesis probability = 8.386948e-01
Photon flux (15-150 keV) in 1 sec: 0.573605 ( -0.140623 0.141012 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.77491e-08 ( -1.27996e-08 1.30497e-08 ) ergs/cm2
Band function
Time interval is from 1.088 sec. to 2.088 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.194298 ( 0.660533 0.660533 )
beta : -1.50951 ( 1.41008 0.539201 )
Epeak [keV] : 53.9736 ( -53.7862 128.608 )
Norm@50keV : 3.84555E-02 ( -0.0400105 69.6776 )
------------------------------------------------------------
# Chi-Squared = 45.23 using 59 PHA bins.
# Reduced chi-squared = 0.8223 for 55 degrees of freedom
# Null hypothesis probability = 8.235278e-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] : 14.4369 (-3.90429 7.70747)
R^2/D10^2 : 7.60488E-02 (-0.0579803 0.153847)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.25 using 59 PHA bins.
# Reduced chi-squared = 0.8815 for 57 degrees of freedom
# Null hypothesis probability = 7.244542e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.337e-09 2.070e-09
25- 50 1.279e-08 5.094e-09
50-150 1.782e-08 1.050e-08
15-150 3.395e-08 1.585e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-100.814 -199.859)
Norm : 2.36741 (-0.575372 0.575349)
------------------------------------------------------------
# Chi-Squared = 46.70 using 59 PHA bins.
# Reduced chi-squared = 0.8193 for 57 degrees of freedom
# Null hypothesis probability = 8.330152e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.895e-09 3.393e-09
25- 50 1.134e-08 6.545e-09
50-150 2.487e-08 1.409e-08
15-150 4.211e-08 2.419e-08
Double BB
R1^2/D10^2 : 0.203077 (-0.146915 0.22272)
kT2 [keV] : 150.192 (-79.169 -103.252)
R2^2/D10^2 : 1.38669E-04 ( )
------------------------------------------------------------
# Chi-Squared = 48.77 using 59 PHA bins.
# Chi-Squared = 43.75 using 59 PHA bins.
# Chi-Squared = 43.73 using 59 PHA bins.
# Reduced chi-squared = 0.8866 for 55 degrees of freedom
# Reduced chi-squared = 0.7955 for 55 degrees of freedom
# Reduced chi-squared = 0.7952 for 55 degrees of freedom
# Null hypothesis probability = 7.103126e-01
# Null hypothesis probability = 8.623624e-01
# Null hypothesis probability = 8.627965e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.497e-09 1.835e-09
25- 50 1.181e-08 7.014e-09
50-150 1.989e-08 1.263e-08
15-150 3.520e-08 2.110e-08
Plot creation:
Thu May 13 23:11:31 EDT 2010