batgrbproduct Analysis for Trigger=414592
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 batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.45
Process Start Time (local time): Mon Mar 8 16:35:05 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger414592/SDC
======================================================================
Trigger: 00414592 Segment: 000
BAT Trigger Time: 289252392 [s; MET]
Trigger Stop: 289252456 [s; MET]
UTC: 2010-03-02T19:53:06.422100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 195.344380663184 Dec: 74.580871005255 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.73
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.73
Flight Position: [ source = BAT ]
RA: 195.344380663184 Dec: 74.580871005255 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 195.467847097545 Dec: 74.5670986888424 [deg; J2000]
{ 13h 01m 52.3s , +74d 34' 01.6" }
+/- 1.62154477114768 [arcmin] (estimated 90% radius based on SNR)
+/- 0.62645251755932 [arcmin] (formal 1-sigma fit error)
SNR: 15.2482459492688
Angular difference between Flight and Ground position is 2.136731 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 18.0119999647141 +/- 1.67630069013583
Measured from: 48.5040000081062
to: 66.5159999728203 [s; relative to TRIGTIME]
T50: 11.8279999494553 +/- 2.79071893471775
Measured from: 52.0239999890327
to: 63.851999938488 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 63.8719999790192
to: 64.8719999790192 [s; relative to TRIGTIME]
Total Fluence
Measured from: 47.6439999938011
to: 67.2919999957085 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.197707 0.202050 0.138439 -0.002049
0.020093 0.020320 0.017754 0.015202 [error]
Peak 0.014275 0.023450 0.015905 0.002168
0.004565 0.004580 0.004044 0.003368 [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 5.50e-08 8.39e-08 9.61e-08 2.10e-07 2.98e-07 4.45e-07 erg/cm2
Error 8.84e-09 8.97e-09 1.70e-08 7.57e-08 3.91e-08 9.26e-08 erg/cm2
Peak flux Power-law 1.54e-01 1.57e-01 1.13e-01 1.30e-01 4.75e-01 5.55e-01 ph/cm2/s
Error 5.67e-02 3.55e-02 3.33e-02 8.11e-02 1.02e-01 1.25e-01 ph/cm2/s
Fluence Cutoff-PL 5.24e-08 8.79e-08 9.67e-08 1.11e-07 2.87e-07 3.48e-07 erg/cm2
Error 1.01e-08 1.15e-08 1.81e-08 1.38e-07 4.27e-08 1.61e-07 erg/cm2
Peak flux Cutoff-PL 1.54e-01 1.57e-01 1.13e-01 1.29e-01 4.75e-01 5.53e-01 ph/cm2/s
Error 4.95e-02 3.64e-02 3.34e-02 1.12e-01 1.02e-01 1.25e-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 1.805 0.203 - - 1.64e-03 2.11e-04 58.240 57
CPL 1.409 0.768 68.0 0.0 2.70e-03 0.00e+00 57.350 56
The chi2 of BB fit is which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.474 0.405 - - 3.83e-03 8.72e-04 40.710 57
CPL 1.486 0.000 9999.2 0.0 3.82e-03 0.00e+00 40.720 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 19.648 47.644 67.292
T90 18.012 48.504 66.516
T50 11.828 52.024 63.852
Peak 1.000 63.872 64.872
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
195.4678 +74.5671 0.0126 13.9 -42.9 0.5536 15.2 TRIG_00414592
------------------------------------------
Foreground time interval of the image:
47.644 67.292 (delta_t = 19.648 [sec])
Background time interval of the image:
-239.000 47.644 (delta_t = 286.644 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 47.644 sec. to 67.292 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80516 ( -0.198027 0.207491 )
Norm@50keV : 1.64497E-03 ( -0.000213163 0.000208113 )
------------------------------------------------------------
# Chi-Squared = 58.24 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.294614e-01
Photon flux (15-150 keV) in 19.65 sec: 0.227129 ( -0.0243525 0.024358 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.97521e-07 ( -3.87231e-08 3.95661e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 47.644 sec. to 67.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40893 ( -0.833206 0.70321 )
Epeak [keV] : 68.0045 ( )
Norm@50keV : 2.70162E-03 ( )
------------------------------------------------------------
# Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 56 degrees of freedom
# Null hypothesis probability = 4.247839e-01
Photon flux (15-150 keV) in 19.65 sec: 0.223251 ( -0.025295 0.025276 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8724e-07 ( -4.19606e-08 4.35326e-08 ) ergs/cm2
Band function
Time interval is from 47.644 sec. to 67.292 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.40894 ( 1.65698 1.09834 )
beta : -10.00000 ( 4.85524e+14 4.85524e+14 )
Epeak [keV] : 67.9798 ( -29.3105 -67.9945 )
Norm@50keV : 2.70133E-03 ( -0.0012298 0.00479515 )
------------------------------------------------------------
# Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.879935e-01
Photon flux (15-150 keV) in 19.65 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Peak spectrum fit
Power-law model
Time interval is from 63.872 sec. to 64.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47402 ( -0.400114 0.409222 )
Norm@50keV : 3.83386E-03 ( -0.000885273 0.000858802 )
------------------------------------------------------------
# Chi-Squared = 40.71 using 59 PHA bins.
# Reduced chi-squared = 0.7142 for 57 degrees of freedom
# Null hypothesis probability = 9.491986e-01
Photon flux (15-150 keV) in 1 sec: 0.475352 ( -0.102252 0.102372 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.65293e-08 ( -9.24486e-09 9.49482e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 63.872 sec. to 64.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48626 ( )
Epeak [keV] : 9999.23 ( )
Norm@50keV : 3.81502E-03 ( )
------------------------------------------------------------
# Chi-Squared = 40.72 using 59 PHA bins.
# Reduced chi-squared = 0.7272 for 56 degrees of freedom
# Null hypothesis probability = 9.377678e-01
Photon flux (15-150 keV) in 1 sec: 0.475211 ( -0.102281 0.102304 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62343e-08 ( -8.9558e-09 7.1332e-09 ) ergs/cm2
Band function
Time interval is from 63.872 sec. to 64.872 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.27178 ( 1.2718 1.2718 )
beta : -1.47397 ( 1.47399 0.400088 )
Epeak [keV] : 13.5576 ( -13.5661 -13.5661 )
Norm@50keV : 7.91717E-03 ( -0.00492478 0.0228317 )
------------------------------------------------------------
# Chi-Squared = 40.71 using 59 PHA bins.
# Reduced chi-squared = 0.7402 for 55 degrees of freedom
# Null hypothesis probability = 9.246576e-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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Plot creation:
Thu May 26 14:07:27 EDT 2011