batgrbproduct Analysis for Trigger=382941
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 Jan 17 21:26:21 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger382941/GCN5_download_cron
======================================================================
Trigger: 00382941 Segment: 000
BAT Trigger Time: 285455185.024 [s; MET]
Trigger Stop: 285455185.088 [s; MET]
UTC: 2010-01-17T21:06:19.576420 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 11.2598564623618 Dec: -1.59437398006469 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.19
Image Trigger?: NO
Rate S/N Ratio: 21.0237960416286 [ if not an image trigger ]
Image S/N Ratio: 7.19
Flight Position: [ source = BAT ]
RA: 11.2598564623618 Dec: -1.59437398006469 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 11.2795264474402 Dec: -1.58645740044666 [deg; J2000]
{ 00h 45m 07.1s , -01d 35' 11.2" }
+/- 1.73032237270443 [arcmin] (estimated 90% radius based on SNR)
+/- 0.885782467194794 [arcmin] (formal 1-sigma fit error)
SNR: 13.8975075401166
Angular difference between Flight and Ground position is 1.271777 arcmin
Partial Coding Fraction: 0.6640625 [ including projection effects ]
Duration
T90: 0.287999927997589 +/- 0.0288444355959144
Measured from: 0.00400012731552124
to: 0.29200005531311 [s; relative to TRIGTIME]
T50: 0.167999923229218 +/- 0.0447213968684142
Measured from: 0.048000156879425
to: 0.216000080108643 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.346000015735626
to: 0.653999984264374 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00800001621246338
to: 0.312000036239624 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.021454 0.036593 0.053486 0.013075
0.004649 0.005437 0.005329 0.004375 [error]
Peak 0.021947 0.036360 0.054035 0.012925
0.004671 0.005466 0.005341 0.004403 [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 5.92e-09 1.59e-08 3.45e-08 1.95e-07 9.30e-08 2.52e-07 erg/cm2
Error 1.61e-09 2.61e-09 4.70e-09 6.19e-08 1.27e-08 6.39e-08 erg/cm2
Peak flux Power-law 5.81e-01 8.48e-01 9.22e-01 1.88e+00 2.93e+00 4.23e+00 ph/cm2/s
Error 1.61e-01 1.44e-01 1.23e-01 5.43e-01 3.87e-01 6.06e-01 ph/cm2/s
Fluence Cutoff-PL 5.50e-09 1.62e-08 3.58e-08 1.37e-07 9.23e-08 1.95e-07 erg/cm2
Error 1.97e-09 2.82e-09 5.83e-09 1.10e-07 1.30e-08 1.02e-07 erg/cm2
Peak flux Cutoff-PL 5.29e-01 8.60e-01 9.63e-01 1.38e+00 2.90e+00 3.73e+00 ph/cm2/s
Error 2.00e-01 1.53e-01 1.56e-01 8.88e-01 3.93e-01 8.76e-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 3.76e+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 0.884 0.224 - - 2.57e-02 3.40e-03 64.420 57
CPL 0.602 0.720 297.3 0.0 3.40e-02 3.18e-02 64.080 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.879 0.223 - - 2.55e-02 3.38e-03 62.300 57
CPL 0.630 0.748 331.6 0.0 3.26e-02 3.16e-02 61.860 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: 0.256000 sec.
T50 in the 50-300 keV band: 0.192000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.320 -0.008 0.312
T90 0.288 0.004 0.292
T50 0.168 0.048 0.216
Peak 1.000 -0.346 0.654
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
11.2795 -1.5865 0.0139 32.7 169.9 0.1312 13.9 TRIG_00382941
------------------------------------------
Foreground time interval of the image:
-0.008 0.312 (delta_t = 0.320 [sec])
Background time interval of the image:
-239.024 -0.008 (delta_t = 239.016 [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 -0.008 sec. to 0.312 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.883545 ( -0.229348 0.217975 )
Norm@50keV : 2.57376E-02 ( -0.00341781 0.0033813 )
------------------------------------------------------------
# Chi-Squared = 64.42 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.330228e-01
Photon flux (15-150 keV) in 0.32 sec: 2.95382 ( -0.389383 0.390323 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.30298e-08 ( -1.26538e-08 1.27036e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.008 sec. to 0.312 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.601895 ( -0.967814 0.4716 )
Epeak [keV] : 297.272 ( -297.273 -297.273 )
Norm@50keV : 3.40319E-02 ( -0.0147931 0.0489032 )
------------------------------------------------------------
# Chi-Squared = 64.08 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 56 degrees of freedom
# Null hypothesis probability = 2.141838e-01
Photon flux (15-150 keV) in 0.32 sec: 2.92834 ( -0.39699 0.39213 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.22992e-08 ( -1.3048e-08 1.29181e-08 ) ergs/cm2
Band function
Time interval is from -0.008 sec. to 0.312 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.620399 ( -0.461715 0.312693 )
beta : -9.36812 ( 9.99574 19.9957 )
Epeak [keV] : 312.477 ( -149.436 -312.577 )
Norm@50keV : 3.34683E-02 ( -0.0107738 0.0239171 )
------------------------------------------------------------
# Chi-Squared = 64.08 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 55 degrees of freedom
# Null hypothesis probability = 1.880230e-01
Photon flux (15-150 keV) in 0.32 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] : 25.2422 (-4.04107 5.34775)
R^2/D10^2 : 7.20657E-02 (-0.0316515 0.0514517)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 72.42 using 59 PHA bins.
# Reduced chi-squared = 1.270 for 57 degrees of freedom
# Null hypothesis probability = 8.192710e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.539e-09 6.491e-10
25- 50 1.448e-08 3.390e-09
50-150 6.830e-08 1.490e-08
15-150 8.532e-08 1.661e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 11.7709 (-11.7709 -11.7709)
------------------------------------------------------------
# Chi-Squared = 88.83 using 59 PHA bins.
# Reduced chi-squared = 1.558 for 57 degrees of freedom
# Null hypothesis probability = 4.428131e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.378e-09 5.139e-09
25- 50 1.804e-08 9.971e-09
50-150 3.956e-08 2.187e-08
15-150 6.698e-08 3.646e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.06713 (-2.63655 4.7473)
R1^2/D10^2 : 1.79724 (-1.43198 7.57661)
kT2 [keV] : 34.0278 (-8.05692 21.0883)
R2^2/D10^2 : 2.64959E-02 (-0.0196837 0.0348284)
------------------------------------------------------------
# Chi-Squared = 62.39 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 55 degrees of freedom
# Null hypothesis probability = 2.301105e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.077e-09 3.430e-09
25- 50 1.567e-08 7.547e-09
50-150 7.177e-08 3.885e-08
15-150 9.351e-08 4.864e-08
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.008 sec. to 0.316 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.878891 ( -0.229078 0.217558 )
Norm@50keV : 2.55029E-02 ( -0.00339589 0.00335834 )
------------------------------------------------------------
# Chi-Squared = 62.30 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 57 degrees of freedom
# Null hypothesis probability = 2.932931e-01
Photon flux (15-150 keV) in 0.324 sec: 2.92694 ( -0.386392 0.387396 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.35022e-08 ( -1.26902e-08 1.27459e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.008 sec. to 0.316 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.630076 ( -1.01802 0.478381 )
Epeak [keV] : 331.607 ( -264.021 -264.021 )
Norm@50keV : 3.25711E-02 ( -0.0125168 0.0506274 )
------------------------------------------------------------
# Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 56 degrees of freedom
# Null hypothesis probability = 2.747690e-01
Photon flux (15-150 keV) in 0.324 sec: 2.89718 ( -0.39381 0.39283 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.26656e-08 ( -1.30906e-08 1.29956e-08 ) ergs/cm2
Band function
Time interval is from -0.008 sec. to 0.316 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -230836 -230836 )
beta : -0.952140 ( -0.297354 0.246271 )
Epeak [keV] : 28.9354 ( -27.7228 12.0661 )
Norm@50keV : 689.773 ( -577.572 3.35512e+06 )
------------------------------------------------------------
# Chi-Squared = 60.85 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 55 degrees of freedom
# Null hypothesis probability = 2.735124e-01
Photon flux (15-150 keV) in 0.324 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] : 25.3927 (-4.02973 5.32946)
R^2/D10^2 : 7.03291E-02 (-0.0307225 0.0495931)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.63 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 57 degrees of freedom
# Null hypothesis probability = 1.216777e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.531e-09 6.682e-10
25- 50 1.447e-08 3.412e-09
50-150 6.904e-08 1.552e-08
15-150 8.604e-08 1.675e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 11.6708 (-11.6708 -11.6708)
------------------------------------------------------------
# Chi-Squared = 87.11 using 59 PHA bins.
# Reduced chi-squared = 1.528 for 57 degrees of freedom
# Null hypothesis probability = 6.280203e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.414e-09 5.247e-09
25- 50 1.811e-08 1.014e-08
50-150 3.972e-08 2.213e-08
15-150 6.724e-08 3.729e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.89174 (-2.50225 4.51026)
R1^2/D10^2 : 1.90933 (-1.57787 7.63001)
kT2 [keV] : 33.5360 (-7.31127 18.0256)
R2^2/D10^2 : 2.76276E-02 (-0.0195667 0.0342328)
------------------------------------------------------------
# Chi-Squared = 59.85 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 55 degrees of freedom
# Null hypothesis probability = 3.040095e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.110e-09 3.546e-09
25- 50 1.561e-08 7.430e-09
50-150 7.222e-08 3.822e-08
15-150 9.394e-08 4.996e-08
Plot creation:
Sun Jan 17 21:44:23 EST 2010