batgrbproduct Analysis for Trigger=411412
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 Feb 7 10:33:29 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger411412/GCN5_download_cron
======================================================================
Trigger: 00411412 Segment: 000
BAT Trigger Time: 287155810.88 [s; MET]
Trigger Stop: 287155811.008 [s; MET]
UTC: 2010-02-06T13:30:05.374220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 47.1767399510983 Dec: 13.1679638316509 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.02
Image Trigger?: NO
Rate S/N Ratio: 58.1807528311554 [ if not an image trigger ]
Image S/N Ratio: 14.02
Flight Position: [ source = BAT ]
RA: 47.1767399510983 Dec: 13.1679638316509 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 47.1670578230908 Dec: 13.1751003041134 [deg; J2000]
{ 03h 08m 40.1s , +13d 10' 30.4" }
+/- 1.46973063489019 [arcmin] (estimated 90% radius based on SNR)
+/- 0.612851720769388 [arcmin] (formal 1-sigma fit error)
SNR: 17.5471792814494
Angular difference between Flight and Ground position is 0.709436 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 0.119999945163727 +/- 0.0215406475404197
Measured from: -0.00399988889694214
to: 0.116000056266785 [s; relative to TRIGTIME]
T50: 0.0559999942779541 +/- 0.0113136892801003
Measured from: 0.0200001001358032
to: 0.0760000944137573 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.439999997615814
to: 0.560000002384186 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00800001621246338
to: 0.124000012874603 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.025328 0.048775 0.068450 0.028521
0.003732 0.004946 0.005961 0.005336 [error]
Peak 0.024622 0.049629 0.068490 0.028280
0.003776 0.005000 0.005997 0.005361 [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 6.37e-09 2.00e-08 5.14e-08 3.79e-07 1.40e-07 4.57e-07 erg/cm2
Error 1.27e-09 2.37e-09 5.30e-09 9.28e-08 1.51e-08 9.55e-08 erg/cm2
Peak flux Power-law 2.78e-01 4.15e-01 4.63e-01 9.77e-01 1.45e+00 2.13e+00 ph/cm2/s
Error 8.61e-02 7.63e-02 7.29e-02 3.54e-01 2.09e-01 3.81e-01 ph/cm2/s
Fluence Cutoff-PL 6.27e-09 2.01e-08 5.18e-08 3.49e-07 1.39e-07 4.27e-07 erg/cm2
Error 1.48e-09 2.52e-09 6.20e-09 2.38e-07 1.34e-08 1.62e-07 erg/cm2
Peak flux Cutoff-PL 2.78e-01 4.15e-01 4.63e-01 9.70e-01 1.45e+00 2.13e+00 ph/cm2/s
Error 8.61e-02 7.64e-02 7.30e-02 3.52e-01 2.09e-01 3.79e-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 0.637 0.168 - - 8.42e-02 8.16e-03 41.250 57
CPL 0.629 0.460 10000.0 0.0 8.49e-02 8.17e-03 41.250 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.842 0.268 - - 1.26e-02 1.83e-03 63.690 57
CPL 0.841 0.270 9999.4 0.0 1.27e-02 1.54e-02 63.700 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.132 -0.008 0.124
T90 0.120 -0.004 0.116
T50 0.056 0.020 0.076
Peak 1.000 -0.440 0.560
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
47.1671 +13.1751 0.0110 26.2 65.4 0.1700 17.5 TRIG_00411412
------------------------------------------
Foreground time interval of the image:
-0.008 0.124 (delta_t = 0.132 [sec])
Background time interval of the image:
-149.679 -0.008 (delta_t = 149.671 [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 0.124 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.637200 ( -0.169915 0.165131 )
Norm@50keV : 8.42258E-02 ( -0.00818618 0.00813213 )
------------------------------------------------------------
# Chi-Squared = 41.25 using 59 PHA bins.
# Reduced chi-squared = 0.7237 for 57 degrees of freedom
# Null hypothesis probability = 9.422586e-01
Photon flux (15-150 keV) in 0.132 sec: 9.79232 ( -0.920653 0.920771 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39686e-07 ( -1.5096e-08 1.51813e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.008 sec. to 0.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.628957 ( -0.708496 0.211137 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 8.49233E-02 ( -0.00819948 0.00814758 )
------------------------------------------------------------
# Chi-Squared = 41.25 using 59 PHA bins.
# Reduced chi-squared = 0.7365 for 56 degrees of freedom
# Null hypothesis probability = 9.299226e-01
Photon flux (15-150 keV) in 0.132 sec: 9.78026 ( -0.91942 0.92644 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.395e-07 ( -1.54029e-08 1.13969e-08 ) ergs/cm2
Band function
Time interval is from -0.008 sec. to 0.124 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09083 ( 1.09083 1.09083 )
beta : -0.637201 ( -0.165113 0.169911 )
Epeak [keV] : 12.4924 ( -12.4924 -12.4924 )
Norm@50keV : 0.120420 ( -0.047424 90038.1 )
------------------------------------------------------------
# Chi-Squared = 41.25 using 59 PHA bins.
# Reduced chi-squared = 0.7500 for 55 degrees of freedom
# Null hypothesis probability = 9.153445e-01
Photon flux (15-150 keV) in 0.132 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] : 27.6985 (-3.76819 4.77722)
R^2/D10^2 : 0.193081 (-0.0683864 0.0981798)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 56.74 using 59 PHA bins.
# Reduced chi-squared = 0.9954 for 57 degrees of freedom
# Null hypothesis probability = 4.849228e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.209e-09 5.881e-10
25- 50 1.912e-08 2.805e-09
50-150 1.065e-07 1.641e-08
15-150 1.288e-07 1.892e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 32.8660 (-32.866 -32.866)
------------------------------------------------------------
# Chi-Squared = 111.35 using 59 PHA bins.
# Reduced chi-squared = 1.9535 for 57 degrees of freedom
# Null hypothesis probability = 2.239254e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.080e-08 5.866e-09
25- 50 2.078e-08 1.137e-08
50-150 4.556e-08 2.508e-08
15-150 7.714e-08 4.200e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.22885 (-3.75933 6.31684)
R1^2/D10^2 : 2.14430 (-1.52697 5.28367)
kT2 [keV] : 45.7769 (-13.5431 138.121)
R2^2/D10^2 : 4.33549E-02 (-0.0386799 0.0728424)
------------------------------------------------------------
# Chi-Squared = 40.94 using 59 PHA bins.
# Reduced chi-squared = 0.7444 for 55 degrees of freedom
# Null hypothesis probability = 9.207958e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.153e-09 3.364e-09
25- 50 2.041e-08 1.008e-08
50-150 1.150e-07 5.977e-08
15-150 1.416e-07 7.093e-08
Peak spectrum fit
Power-law model
Time interval is from -0.440 sec. to 0.560 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.842159 ( -0.274711 0.26064 )
Norm@50keV : 1.26391E-02 ( -0.00183602 0.00182486 )
------------------------------------------------------------
# Chi-Squared = 63.69 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 57 degrees of freedom
# Null hypothesis probability = 2.527808e-01
Photon flux (15-150 keV) in 1 sec: 1.45104 ( -0.208768 0.209033 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45144e-07 ( -2.36094e-08 2.39435e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.440 sec. to 0.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.841371 ( -0.280943 0.258765 )
Epeak [keV] : 9999.36 ( -9998.3 -9998.3 )
Norm@50keV : 1.27234E-02 ( -0.0127202 0.0180064 )
------------------------------------------------------------
# Chi-Squared = 63.70 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 56 degrees of freedom
# Null hypothesis probability = 2.239453e-01
Photon flux (15-150 keV) in 1 sec: 1.45062 ( -0.20871 0.20898 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45175e-07 ( -2.3625e-08 2.3957e-08 ) ergs/cm2
Band function
Time interval is from -0.440 sec. to 0.560 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -342561 -342561 )
beta : -0.927887 ( -0.264642 0.278386 )
Epeak [keV] : 30.0762 ( -30.0418 8.85333 )
Norm@50keV : 266.912 ( -269.637 1.37323e+06 )
------------------------------------------------------------
# Chi-Squared = 63.04 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 55 degrees of freedom
# Null hypothesis probability = 2.132483e-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] : 24.8822 (-5.26902 7.547)
R^2/D10^2 : 3.62144E-02 (-0.0191262 0.0374195)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 74.04 using 59 PHA bins.
# Reduced chi-squared = 1.299 for 57 degrees of freedom
# Null hypothesis probability = 6.415134e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.905e-09 1.238e-09
25- 50 2.210e-08 6.825e-09
50-150 1.015e-07 2.962e-08
15-150 1.275e-07 3.202e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 5.51395 (-5.51395 -5.51395)
------------------------------------------------------------
# Chi-Squared = 82.40 using 59 PHA bins.
# Reduced chi-squared = 1.446 for 57 degrees of freedom
# Null hypothesis probability = 1.553502e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.372e-08 7.720e-09
25- 50 2.639e-08 1.473e-08
50-150 5.789e-08 3.198e-08
15-150 9.800e-08 5.380e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.35685 (-3.09431 4.69012)
R1^2/D10^2 : 0.595402 (-0.437612 2.14247)
kT2 [keV] : 45.3362 (-16.5958 129.435)
R2^2/D10^2 : 5.92247E-03 (-0.00552524 0.0153704)
------------------------------------------------------------
# Chi-Squared = 62.17 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 55 degrees of freedom
# Null hypothesis probability = 2.360804e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.184e-09 5.190e-09
25- 50 2.473e-08 1.299e-08
50-150 1.161e-07 6.255e-08
15-150 1.500e-07 7.990e-08
Plot creation:
Sun Feb 7 10:57:56 EST 2010