batgrbproduct Analysis for Trigger=420367
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 v2.45
Process Start Time (local time): Sun Apr 25 21:16:37 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger420367/GCN5_download_cron
======================================================================
Trigger: 00420367 Segment: 000
BAT Trigger Time: 293819568 [s; MET]
Trigger Stop: 293819632 [s; MET]
UTC: 2010-04-24T16:32:42.263180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 209.453330722996 Dec: 1.51343266694002 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.47
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.47
Flight Position: [ source = BAT ]
RA: 209.453330722996 Dec: 1.51343266694002 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 209.443951175747 Dec: 1.52183299100721 [deg; J2000]
{ 13h 57m 46.5s , +01d 31' 18.6" }
+/- 1.34510538310581 [arcmin] (estimated 90% radius based on SNR)
+/- 0.501110176268098 [arcmin] (formal 1-sigma fit error)
SNR: 19.9150221242233
Angular difference between Flight and Ground position is 0.755332 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 104.835999906063 +/- 15.111876277615
Measured from: 26.6560001373291
to: 131.492000043392 [s; relative to TRIGTIME]
T50: 44.1959999799728 +/- 8.77630633042566
Measured from: 46.4080001115799
to: 90.6040000915527 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 58.2799999713898
to: 59.2799999713898 [s; relative to TRIGTIME]
Total Fluence
Measured from: 22.3439999818802
to: 148.452000021935 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.993686 1.110222 0.598982 0.085006
0.060323 0.061076 0.054123 0.048768 [error]
Peak 0.022164 0.018030 0.008081 0.011809
0.005349 0.005672 0.004991 0.004512 [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 2.87e-07 4.30e-07 4.82e-07 1.02e-06 1.51e-06 2.22e-06 erg/cm2
Error 2.98e-08 2.83e-08 5.25e-08 2.30e-07 1.19e-07 2.79e-07 erg/cm2
Peak flux Power-law 1.53e-01 1.26e-01 7.01e-02 5.76e-02 3.74e-01 4.06e-01 ph/cm2/s
Error 7.21e-02 4.20e-02 4.03e-02 7.78e-02 1.24e-01 1.43e-01 ph/cm2/s
Fluence Cutoff-PL 2.82e-07 4.38e-07 4.81e-07 7.51e-07 1.48e-06 1.96e-06 erg/cm2
Error 3.30e-08 3.53e-08 5.44e-08 4.57e-07 1.41e-07 4.93e-07 erg/cm2
Peak flux Cutoff-PL 1.53e-01 1.26e-01 7.00e-02 5.70e-02 3.74e-01 4.06e-01 ph/cm2/s
Error 7.20e-02 4.20e-02 4.03e-02 7.71e-02 1.24e-01 1.43e-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 1.836 0.129 - - 1.30e-03 1.01e-04 51.870 57
CPL 1.653 0.000 83.6 0.0 1.64e-03 0.00e+00 51.510 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.843 0.691 - - 2.67e-03 1.16e-03 55.040 57
CPL 1.829 2.028 9993.5 0.0 2.69e-03 0.00e+00 55.050 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: 52.864000 sec.
T50 in the 50-300 keV band: 30.016000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 126.108 22.344 148.452
T90 104.836 26.656 131.492
T50 44.196 46.408 90.604
Peak 1.000 58.280 59.280
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
209.4440 +1.5218 0.0097 12.5 75.6 1.5768 19.9 TRIG_00420367
------------------------------------------
Foreground time interval of the image:
22.344 71.501 (delta_t = 49.157 [sec])
Background time interval of the image:
-239.000 22.344 (delta_t = 261.344 [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 22.344 sec. to 148.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83627 ( -0.127507 0.13065 )
Norm@50keV : 1.29996E-03 ( -0.000101909 0.00010047 )
------------------------------------------------------------
# Chi-Squared = 51.87 using 59 PHA bins.
# Reduced chi-squared = 0.9099 for 57 degrees of freedom
# Null hypothesis probability = 6.675512e-01
Photon flux (15-150 keV) in 126.1 sec: 0.181712 ( -0.0120866 0.0120947 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5076e-06 ( -1.18494e-07 1.20172e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 22.344 sec. to 148.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65330 ( )
Epeak [keV] : 83.6331 ( )
Norm@50keV : 1.63934E-03 ( )
------------------------------------------------------------
# Chi-Squared = 51.51 using 59 PHA bins.
# Reduced chi-squared = 0.9198 for 56 degrees of freedom
# Null hypothesis probability = 6.452551e-01
Photon flux (15-150 keV) in 126.1 sec: 0.180068 ( -0.006446 0.012528 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4791e-06 ( -1.42997e-07 1.38193e-07 ) ergs/cm2
Band function
Time interval is from 22.344 sec. to 148.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.68533 ( 1.68531 0.399967 )
beta : -9.37167 ( 10 20 )
Epeak [keV] : 91.9065 ( -44.0398 -91.8655 )
Norm@50keV : 1.57565E-03 ( -0.000370378 0.000554139 )
------------------------------------------------------------
# Chi-Squared = 51.51 using 59 PHA bins.
# Reduced chi-squared = 0.9365 for 55 degrees of freedom
# Null hypothesis probability = 6.088430e-01
Photon flux (15-150 keV) in 126.1 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] : 10.7370 (-0.932068 1.05176)
R^2/D10^2 : 6.29436E-02 (-0.0185809 0.025819)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 106.79 using 59 PHA bins.
# Reduced chi-squared = 1.8734 for 57 degrees of freedom
# Null hypothesis probability = 7.209927e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.902e-07 2.156e-08
25- 50 5.211e-07 4.136e-08
50-150 3.330e-07 6.185e-08
15-150 1.044e-06 8.260e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 92.8558 (-21.3933 33.3769)
Norm : 0.809240 (-0.0783003 0.091679)
------------------------------------------------------------
# Chi-Squared = 52.98 using 59 PHA bins.
# Reduced chi-squared = 0.9294 for 57 degrees of freedom
# Null hypothesis probability = 6.267803e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.665e-07 2.995e-08
25- 50 4.538e-07 3.216e-08
50-150 7.042e-07 2.502e-07
15-150 1.424e-06 2.712e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.17843 (-0.89485 1.25322)
R1^2/D10^2 : 0.368486 (-0.172742 0.288642)
kT2 [keV] : 23.5296 (-4.52078 9.74788)
R2^2/D10^2 : 2.57129E-03 (-0.00173567 0.00307784)
------------------------------------------------------------
# Chi-Squared = 49.24 using 59 PHA bins.
# Reduced chi-squared = 0.8954 for 55 degrees of freedom
# Null hypothesis probability = 6.932088e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.777e-07 6.425e-08
25- 50 4.376e-07 1.021e-07
50-150 7.571e-07 4.124e-07
15-150 1.472e-06 5.539e-07
Peak spectrum fit
Power-law model
Time interval is from 58.280 sec. to 59.280 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84325 ( -0.667149 0.713906 )
Norm@50keV : 2.67043E-03 ( -0.00119479 0.00113037 )
------------------------------------------------------------
# Chi-Squared = 55.04 using 59 PHA bins.
# Reduced chi-squared = 0.9657 for 57 degrees of freedom
# Null hypothesis probability = 5.488412e-01
Photon flux (15-150 keV) in 1 sec: 0.374333 ( -0.12398 0.124039 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45565e-08 ( -1.01769e-08 1.14734e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 58.280 sec. to 59.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82856 ( -1.63567 2.42072 )
Epeak [keV] : 9993.51 ( )
Norm@50keV : 2.69446E-03 ( )
------------------------------------------------------------
# Chi-Squared = 55.05 using 59 PHA bins.
# Reduced chi-squared = 0.9830 for 56 degrees of freedom
# Null hypothesis probability = 5.109996e-01
Photon flux (15-150 keV) in 1 sec: 0.374155 ( -0.12394 0.124 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.45367e-08 ( -1.01696e-08 1.14696e-08 ) ergs/cm2
Band function
Time interval is from 58.280 sec. to 59.280 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99818 ( -1060.81 -1045.83 )
beta : -2.73110 ( 2.75568 1.15039 )
Epeak [keV] : 25.5967 ( -7.7327 8.04767 )
Norm@50keV : 417.957 ( -427.75 2955.82 )
------------------------------------------------------------
# Chi-Squared = 51.95 using 59 PHA bins.
# Reduced chi-squared = 0.9446 for 55 degrees of freedom
# Null hypothesis probability = 5.917856e-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] : 7.17159 (-1.74154 2.45766)
R^2/D10^2 : 0.658338 (-0.462049 1.34173)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 53.79 using 59 PHA bins.
# Reduced chi-squared = 0.9437 for 57 degrees of freedom
# Null hypothesis probability = 5.961396e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.574e-09 3.385e-09
25- 50 7.997e-09 4.956e-09
50-150 1.445e-09 1.257e-09
15-150 1.502e-08 9.115e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.3817 (-39.584 -59.7166)
Norm : 1.94001 (-0.877476 2.13295)
------------------------------------------------------------
# Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 0.9753 for 57 degrees of freedom
# Null hypothesis probability = 5.280901e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.868e-09 3.018e-09
25- 50 7.385e-09 4.620e-09
50-150 8.330e-09 7.475e-09
15-150 2.058e-08 1.388e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.999 ( )
R1^2/D10^2 : 7.45911E-05 (-4.64824e-05 4.76983e-05)
kT2 [keV] : 6.51355 (-1.52693 1.93427)
R2^2/D10^2 : 0.882739 (-0.597316 1.77276)
------------------------------------------------------------
# Chi-Squared = 53.79 using 59 PHA bins.
# Chi-Squared = 46.84 using 59 PHA bins.
# Reduced chi-squared = 0.9781 for 55 degrees of freedom
# Reduced chi-squared = 0.8517 for 55 degrees of freedom
# Null hypothesis probability = 5.208015e-01
# Null hypothesis probability = 7.750495e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.571e-09 1.704e+00
25- 50 7.999e-09 1.489e+01
50-150 1.448e-09 3.532e+02
15-150 1.502e-08 3.842e+02
Plot creation:
Sun Apr 25 21:34:44 EDT 2010