batgrbproduct Analysis for Trigger=422783
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): Sun May 23 01:17:36 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger422783/GCN5_download_cron
======================================================================
Trigger: 00422783 Segment: 000
BAT Trigger Time: 296192758.144 [s; MET]
Trigger Stop: 296192758.272 [s; MET]
UTC: 2010-05-22T03:45:52.323860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 6.98318125259123 Dec: 9.41748845869158 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.03
Image Trigger?: NO
Rate S/N Ratio: 26.9072480941474 [ if not an image trigger ]
Image S/N Ratio: 11.03
Flight Position: [ source = BAT ]
RA: 6.98318125259123 Dec: 9.41748845869158 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 6.98903580910809 Dec: 9.39497463678832 [deg; J2000]
{ 00h 27m 57.4s , +09d 23' 41.9" }
+/- 1.31711294414737 [arcmin] (estimated 90% radius based on SNR)
+/- 0.609653857897688 [arcmin] (formal 1-sigma fit error)
SNR: 20.5224097488578
Angular difference between Flight and Ground position is 1.394574 arcmin
Partial Coding Fraction: 0.71875 [ including projection effects ]
Duration
T90: 48 +/- 16
Measured from: -15.1439998745918
to: 32.8560001254082 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 0.856000125408173
to: 16.8560001254082 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.35600000619888
to: 9.35600000619888 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.1439999938011
to: 48.8560000061989 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.348686 1.475535 0.829108 0.138550
0.051355 0.053477 0.049552 0.049440 [error]
Peak 0.408556 0.594569 0.420761 0.094110
0.027428 0.029044 0.027148 0.026276 [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 4.28e-07 6.11e-07 6.47e-07 1.27e-06 2.08e-06 2.96e-06 erg/cm2
Error 3.25e-08 2.80e-08 4.95e-08 2.04e-07 1.10e-07 2.47e-07 erg/cm2
Peak flux Power-law 3.96e-02 1.35e-02 2.59e-03 5.83e-04 5.61e-02 5.48e-02 ph/cm2/s
Error 6.53e-02 3.25e-02 2.24e-02 3.28e-01 1.01e-01 1.04e-01 ph/cm2/s
Fluence Cutoff-PL 4.11e-07 6.27e-07 6.43e-07 7.75e-07 2.01e-06 2.46e-06 erg/cm2
Error 3.82e-08 3.45e-08 5.22e-08 4.36e-07 1.36e-07 5.03e-07 erg/cm2
Peak flux Cutoff-PL 5.45e-02 1.72e-02 1.89e-04 5.38e-09 7.19e-02 7.13e-02 ph/cm2/s
Error 7.71e-02 2.58e-02 2.08e-02 1.86e-03 1.02e-01 1.02e-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 1.916 0.094 - - 3.54e-03 1.90e-04 43.190 57
CPL 1.626 0.362 57.6 -21.0 5.07e-03 2.30e-03 41.310 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.466 0.000 - - 1.40e-04 6.99e-04 50.670 57
CPL 1.000 0.000 50.0 0.0 8.24e-04 0.00e+00 51.020 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: 29.440000 sec.
T50 in the 50-300 keV band: 2.304000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 -15.144 48.856
T90 48.000 -15.144 32.856
T50 16.000 0.856 16.856
Peak 1.000 8.356 9.356
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
6.9890 +9.3950 0.0093 22.5 -65.8 2.6144 20.5 TRIG_00422783
------------------------------------------
Foreground time interval of the image:
-15.144 8.357 (delta_t = 23.501 [sec])
Background time interval of the image:
-24.043 -15.144 (delta_t = 8.899 [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 -15.144 sec. to 48.856 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91587 ( -0.0935372 0.0951679 )
Norm@50keV : 3.53783E-03 ( -0.000191229 0.000189393 )
------------------------------------------------------------
# Chi-Squared = 43.19 using 59 PHA bins.
# Reduced chi-squared = 0.7577 for 57 degrees of freedom
# Null hypothesis probability = 9.117570e-01
Photon flux (15-150 keV) in 64 sec: 0.511170 ( -0.0241028 0.0241489 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08204e-06 ( -1.09832e-07 1.10928e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.144 sec. to 48.856 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62612 ( -0.381683 0.341467 )
Epeak [keV] : 57.6490 ( -15.58 -57.6707 )
Norm@50keV : 5.07468E-03 ( -0.00158311 0.00302428 )
------------------------------------------------------------
# Chi-Squared = 41.31 using 59 PHA bins.
# Reduced chi-squared = 0.7376 for 56 degrees of freedom
# Null hypothesis probability = 9.289710e-01
Photon flux (15-150 keV) in 64 sec: 0.501129 ( -0.026893 0.026781 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01443e-06 ( -1.36109e-07 1.36576e-07 ) ergs/cm2
Band function
Time interval is from -15.144 sec. to 48.856 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.16249 ( 1.60199 0.352368 )
beta : 10.00000 ( -1.97895e+15 -1.97895e+15 )
Epeak [keV] : 1.79879 ( )
Norm@50keV : 1.77611E-19 ( )
------------------------------------------------------------
# Chi-Squared = 441.59 using 59 PHA bins.
# Reduced chi-squared = 8.0289 for 55 degrees of freedom
# Null hypothesis probability = 9.154279e-62
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] : 11.0770 ( )
R^2/D10^2 : 0.152864 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 140.21 using 59 PHA bins.
# Reduced chi-squared = 2.4598 for 57 degrees of freedom
# Null hypothesis probability = 5.797995e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.512e-07 2.070e-08
25- 50 7.165e-07 3.904e-08
50-150 4.993e-07 6.403e-08
15-150 1.467e-06 8.224e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 81.6441 (-13.012 17.275)
Norm : 2.33516 (-0.176513 0.19809)
------------------------------------------------------------
# Chi-Squared = 43.28 using 59 PHA bins.
# Reduced chi-squared = 0.7593 for 57 degrees of freedom
# Null hypothesis probability = 9.101378e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.883e-07 2.749e-08
25- 50 6.423e-07 2.995e-08
50-150 9.190e-07 1.024e-07
15-150 1.950e-06 1.261e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74905 (-0.78181 0.845116)
R1^2/D10^2 : 1.29587 (-0.517483 1.00284)
kT2 [keV] : 20.2145 (-2.7606 3.84487)
R2^2/D10^2 : 1.21753E-02 (-0.00595905 0.00966661)
------------------------------------------------------------
# Chi-Squared = 39.62 using 59 PHA bins.
# Reduced chi-squared = 0.7204 for 55 degrees of freedom
# Null hypothesis probability = 9.412660e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.028e-07 6.509e-08
25- 50 6.166e-07 8.880e-08
50-150 9.538e-07 2.097e-07
15-150 1.973e-06 2.874e-07
Peak spectrum fit
Power-law model
Time interval is from 8.356 sec. to 9.356 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.46589 ( -3.45421 -3.45421 )
Norm@50keV : 1.40420E-04 ( -0.000143487 0.00125419 )
------------------------------------------------------------
# Chi-Squared = 50.67 using 59 PHA bins.
# Reduced chi-squared = 0.8889 for 57 degrees of freedom
# Null hypothesis probability = 7.099638e-01
Photon flux (15-150 keV) in 1 sec: 5.60695E-02 ( -0.0560695 0.144941 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.23545e-09 ( -2.23545e-09 1.27456e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.356 sec. to 9.356 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.24149E-04 ( )
------------------------------------------------------------
# Chi-Squared = 51.02 using 59 PHA bins.
# Reduced chi-squared = 0.9111 for 56 degrees of freedom
# Null hypothesis probability = 6.633135e-01
Photon flux (15-150 keV) in 1 sec: 7.19350E-02 ( -0.071935 0.132279 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55057e-09 ( -2.55057e-09 5.85318e-09 ) ergs/cm2
Band function
Time interval is from 8.356 sec. to 9.356 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97279 ( -72.1779 -72.1779 )
beta : -9.35768 ( 9.99919 9.99919 )
Epeak [keV] : 18.2930 ( -18.4786 -18.4786 )
Norm@50keV : 1157.34 ( -1060.5 260496 )
------------------------------------------------------------
# Chi-Squared = 50.28 using 59 PHA bins.
# Reduced chi-squared = 0.9142 for 55 degrees of freedom
# Null hypothesis probability = 6.552535e-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] : 4.53054 (-4.64895 -4.64895)
R^2/D10^2 : 0.991417 (-0.967967 -0.967967)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.36 using 59 PHA bins.
# Reduced chi-squared = 0.8835 for 57 degrees of freedom
# Null hypothesis probability = 7.206295e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.598e-09 1.434e-09
25- 50 8.116e-10 7.150e-10
50-150 2.000e-11 3.498e-11
15-150 2.429e-09 2.315e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.9883 (-11.9983 -11.9983)
Norm : 1.55843 (-1.55526 -1.55526)
------------------------------------------------------------
# Chi-Squared = 50.52 using 59 PHA bins.
# Reduced chi-squared = 0.8864 for 57 degrees of freedom
# Null hypothesis probability = 7.149734e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.401e-09 8.765e-10
25- 50 7.569e-10 1.058e-09
50-150 8.231e-11 2.552e-10
15-150 2.241e-09 1.742e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.56467 (-4.58405 -4.58405)
R1^2/D10^2 : 0.969034 (-0.947936 -0.947936)
kT2 [keV] : 0.158585 (-0.158585 -0.158585)
R2^2/D10^2 : 2.70264E-04 (-0.000272684 -0.000272684)
------------------------------------------------------------
# Chi-Squared = 50.36 using 59 PHA bins.
# Reduced chi-squared = 0.9156 for 55 degrees of freedom
# Null hypothesis probability = 6.522791e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sun May 23 01:57:18 EDT 2010