batgrbproduct Analysis for Trigger=422437
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): Tue May 18 21:52:04 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger422437/GCN5_download_cron
======================================================================
Trigger: 00422437 Segment: 000
BAT Trigger Time: 295856306.56 [s; MET]
Trigger Stop: 295856307.584 [s; MET]
UTC: 2010-05-18T06:18:20.751780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 311.161938515683 Dec: 40.1699494620105 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.6
Image Trigger?: NO
Rate S/N Ratio: 28.7228132326901 [ if not an image trigger ]
Image S/N Ratio: 6.6
Flight Position: [ source = BAT ]
RA: 311.161938515683 Dec: 40.1699494620105 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 311.138270564354 Dec: 40.2016949128708 [deg; J2000]
{ 20h 44m 33.2s , +40d 12' 06.1" }
+/- 4.70139092988125 [arcmin] (estimated 90% radius based on SNR)
+/- 3.33517452910639 [arcmin] (formal 1-sigma fit error)
SNR: 3.33269063597737
Angular difference between Flight and Ground position is 2.192018 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 2.98023223876953e-08
to: 1.02400001883507 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000223 0.000491 0.021625 0.037780
0.008019 0.009308 0.008173 0.010206 [error]
Peak 0.000223 0.000491 0.021625 0.037780
0.008019 0.009308 0.008173 0.010206 [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 4.27e-10 2.52e-09 1.30e-08 2.95e-07 4.18e-08 3.10e-07 erg/cm2
Error 1.10e-09 3.30e-09 1.03e-08 5.22e-07 2.24e-08 5.27e-07 erg/cm2
Peak flux Power-law 1.33e-02 4.12e-02 1.05e-01 7.61e-01 2.85e-01 9.20e-01 ph/cm2/s
Error 3.48e-02 5.55e-02 8.45e-02 1.13e+00 2.29e-01 1.10e+00 ph/cm2/s
Fluence Cutoff-PL 1.36e-10 1.30e-10 1.86e-09 1.51e-08 7.83e-08 4.22e-08 erg/cm2
Error 3.16e-09 9.69e-09 3.11e-07 2.32e-08 2.10e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 4.10e-03 2.86e-02 1.19e-01 2.86e-01 2.76e-01 5.08e-01 ph/cm2/s
Error 3.22e-02 5.32e-02 8.05e-02 1.42e+00 1.57e-01 0.00e+00 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 -0.363 0.448 - - 1.80e-03 1.85e-03 42.630 57
CPL -3.376 0.000 155.0 0.0 8.75e-03 0.00e+00 42.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.347 0.454 - - 1.83e-03 1.87e-03 43.000 57
CPL -3.310 0.000 155.8 0.0 8.62e-03 0.00e+00 42.650 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
311.1383 +40.2017 0.0576 7.2 158.7 0.0599 3.3 TRIG_00422437
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.560 -10.560 (delta_t = 50.000 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.362515 ( 0.362515 1.25757 )
Norm@50keV : 1.80403E-03 ( -0.00180403 0.00190423 )
------------------------------------------------------------
# Chi-Squared = 42.63 using 59 PHA bins.
# Reduced chi-squared = 0.7478 for 57 degrees of freedom
# Null hypothesis probability = 9.215889e-01
Photon flux (15-150 keV) in 1.024 sec: 0.282938 ( -0.282938 0.173602 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.17916e-08 ( -2.23579e-08 2.23755e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.37596 ( )
Epeak [keV] : 154.972 ( -134.728 -134.728 )
Norm@50keV : 8.74885E-03 ( )
------------------------------------------------------------
# Chi-Squared = 42.26 using 59 PHA bins.
# Reduced chi-squared = 0.7546 for 56 degrees of freedom
# Null hypothesis probability = 9.129003e-01
Photon flux (15-150 keV) in 1.024 sec: 0.274956 ( -0.144787 0.169039 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.22089e-08 ( -2.30923e-08 2.33413e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.332684 ( 0.332706 0.332706 )
beta : 0.362548 ( -1.25886 -0.362513 )
Epeak [keV] : 11.9972 ( -11.9972 -11.9972 )
Norm@50keV : 3.57035E-03 ( 3368.94 -0.00357032 )
------------------------------------------------------------
# Chi-Squared = 42.63 using 59 PHA bins.
# Reduced chi-squared = 0.7750 for 55 degrees of freedom
# Null hypothesis probability = 8.882506e-01
Photon flux (15-150 keV) in 1.024 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] : 65.3507 ( )
R^2/D10^2 : 9.05012E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 42.47 using 59 PHA bins.
# Reduced chi-squared = 0.7450 for 57 degrees of freedom
# Null hypothesis probability = 9.242011e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.600e-09 9.313e-10
25- 50 1.172e-10 8.397e-11
50-150 3.673e-14 1.614e-14
15-150 1.717e-09 9.667e-10
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 0.952718 (-0.915465 0.783036)
------------------------------------------------------------
# Chi-Squared = 48.43 using 59 PHA bins.
# Reduced chi-squared = 0.8497 for 57 degrees of freedom
# Null hypothesis probability = 7.832220e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.481e-09 5.975e-10
25- 50 1.341e-10 5.806e-11
50-150 3.274e-13 1.992e-13
15-150 1.615e-09 7.286e-10
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.71937 (-1.63204 -1.63204)
R1^2/D10^2 : 408.695 ( )
kT2 [keV] : 66.9219 (-61.1028 -68.1887)
R2^2/D10^2 : 7.97721E-04 (-0.00057254 0.00687694)
------------------------------------------------------------
# Chi-Squared = 41.92 using 59 PHA bins.
# Chi-Squared = 41.84 using 59 PHA bins.
# Reduced chi-squared = 0.7621 for 55 degrees of freedom
# Reduced chi-squared = 0.7607 for 55 degrees of freedom
# Null hypothesis probability = 9.028400e-01
# Null hypothesis probability = 9.043161e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.210e-09 3.870e-10
25- 50 2.717e-09 2.037e-09
50-150 3.791e-08 2.688e-08
15-150 4.184e-08 2.751e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.347003 ( 0.347003 1.25597 )
Norm@50keV : 1.82989E-03 ( -0.00182989 0.00190713 )
------------------------------------------------------------
# Chi-Squared = 43.00 using 59 PHA bins.
# Reduced chi-squared = 0.7545 for 57 degrees of freedom
# Null hypothesis probability = 9.151028e-01
Photon flux (15-150 keV) in 1.024 sec: 0.284922 ( -0.284922 0.173944 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.19431e-08 ( -2.23407e-08 2.23597e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.30978 ( )
Epeak [keV] : 155.753 ( -134.351 -134.351 )
Norm@50keV : 8.61866E-03 ( )
------------------------------------------------------------
# Chi-Squared = 42.65 using 59 PHA bins.
# Reduced chi-squared = 0.7616 for 56 degrees of freedom
# Null hypothesis probability = 9.056031e-01
Photon flux (15-150 keV) in 1.024 sec: 0.275988 ( -0.144573 0.169595 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24186e-08 ( -2.31776e-08 2.32497e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.161874 ( -0.163449 -0.163449 )
beta : 0.346653 ( -1.25556 -0.346986 )
Epeak [keV] : 25.1850 ( -25.1861 -25.1861 )
Norm@50keV : 2.79067E-03 ( -0.00279031 78056.7 )
------------------------------------------------------------
# Chi-Squared = 43.00 using 59 PHA bins.
# Reduced chi-squared = 0.7819 for 55 degrees of freedom
# Null hypothesis probability = 8.799187e-01
Photon flux (15-150 keV) in 1.024 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] : 71.5948 ( )
R^2/D10^2 : 7.34143E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 42.82 using 59 PHA bins.
# Reduced chi-squared = 0.7513 for 57 degrees of freedom
# Null hypothesis probability = 9.182460e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.691e-09 8.991e-10
25- 50 1.231e-10 3.532e-11
50-150 3.798e-14 9.339e-15
15-150 1.814e-09 8.397e-10
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 0.950630 (-0.930619 0.779736)
------------------------------------------------------------
# Chi-Squared = 48.75 using 59 PHA bins.
# Reduced chi-squared = 0.8553 for 57 degrees of freedom
# Null hypothesis probability = 7.733058e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.566e-09 4.354e-10
25- 50 1.419e-10 7.885e-11
50-150 3.465e-13 4.439e-13
15-150 1.708e-09 8.540e-10
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.74802 (-1.71314 -1.71314)
R1^2/D10^2 : 375.075 ( )
kT2 [keV] : 67.1579 (-61.3271 -68.359)
R2^2/D10^2 : 7.95408E-04 (-0.000572813 0.00687867)
------------------------------------------------------------
# Chi-Squared = 42.17 using 59 PHA bins.
# Chi-Squared = 42.13 using 59 PHA bins.
# Reduced chi-squared = 0.7667 for 55 degrees of freedom
# Reduced chi-squared = 0.7660 for 55 degrees of freedom
# Null hypothesis probability = 8.978132e-01
# Null hypothesis probability = 8.985542e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.263e-09 3.474e-10
25- 50 2.467e-09 1.850e-09
50-150 3.714e-08 2.418e-08
15-150 4.087e-08 2.514e-08
Plot creation:
Tue May 18 22:02:57 EDT 2010