batgrbproduct Analysis for Trigger=510736
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 v2.46
Process Start Time (local time): Fri Dec 30 04:37:42 EST 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger510736/GCN5_download_cron
======================================================================
Trigger: 00510736 Segment: 000
BAT Trigger Time: 346891080 [s; MET]
Trigger Stop: 346891081.024 [s; MET]
UTC: 2011-12-29T22:37:52.271700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 76.2818710787315 Dec: -84.7226656056908 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.81
Image Trigger?: NO
Rate S/N Ratio: 9.79795897113271 [ if not an image trigger ]
Image S/N Ratio: 7.81
Flight Position: [ source = BAT ]
RA: 76.2818710787315 Dec: -84.7226656056908 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 76.5560288904832 Dec: -84.6975506301645 [deg; J2000]
{ 05h 06m 13.4s , -84d 41' 51.2" }
+/- 2.70334501401602 [arcmin] (estimated 90% radius based on SNR)
+/- 1.55283007570544 [arcmin] (formal 1-sigma fit error)
SNR: 7.34710542066528
Angular difference between Flight and Ground position is 2.137913 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 26.8679999113083 +/- 6.41260163979837
Measured from: -0.459999859333038
to: 26.4080000519753 [s; relative to TRIGTIME]
T50: 17.3079999685287 +/- 2.93575541799494
Measured from: 0.852000117301941
to: 18.1600000858307 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.120000004768372
to: 1.12000000476837 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.972000002861023
to: 29.9840000271797 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.201321 0.234734 0.140953 0.033601
0.038018 0.037730 0.033168 0.029371 [error]
Peak 0.035418 0.047495 0.025067 0.007721
0.007309 0.007434 0.006627 0.005401 [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 6.51e-08 9.58e-08 1.05e-07 2.16e-07 3.32e-07 4.82e-07 erg/cm2
Error 1.75e-08 1.75e-08 3.21e-08 1.35e-07 7.40e-08 1.68e-07 erg/cm2
Peak flux Power-law 3.52e-01 3.24e-01 2.07e-01 2.03e-01 9.67e-01 1.09e+00 ph/cm2/s
Error 1.03e-01 6.13e-02 5.35e-02 1.04e-01 1.80e-01 2.05e-01 ph/cm2/s
Fluence Cutoff-PL 6.51e-08 9.59e-08 1.05e-07 2.14e-07 3.32e-07 4.44e-07 erg/cm2
Error 1.81e-08 1.99e-08 3.25e-08 1.88e-07 7.62e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.39e-01 3.35e-01 2.10e-01 1.43e-01 9.59e-01 1.03e+00 ph/cm2/s
Error 1.15e-01 7.52e-02 5.76e-02 1.58e-01 1.84e-01 2.44e-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 1.867 0.351 - - 1.17e-03 2.60e-04 53.440 57
CPL 1.764 0.904 102.7 0.0 1.33e-03 0.00e+00 53.470 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.649 0.326 - - 7.41e-03 1.49e-03 43.400 57
CPL 1.379 1.046 108.1 0.0 1.03e-02 0.00e+00 43.250 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 30.956 -0.972 29.984
T90 26.868 -0.460 26.408
T50 17.308 0.852 18.160
Peak 1.000 0.120 1.120
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
76.5560 -84.6976 0.0261 30.4 -0.2 0.3295 7.3 TRIG_00510736
------------------------------------------
Foreground time interval of the image:
-0.972 11.401 (delta_t = 12.373 [sec])
Background time interval of the image:
-239.000 -0.972 (delta_t = 238.028 [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 -0.972 sec. to 29.984 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86679 ( -0.336437 0.364589 )
Norm@50keV : 1.16635E-03 ( -0.000265985 0.000254124 )
------------------------------------------------------------
# Chi-Squared = 53.44 using 59 PHA bins.
# Reduced chi-squared = 0.9375 for 57 degrees of freedom
# Null hypothesis probability = 6.095472e-01
Photon flux (15-150 keV) in 30.96 sec: 0.165073 ( -0.0301612 0.0301719 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.31972e-07 ( -7.28021e-08 7.51845e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.972 sec. to 29.984 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76358 ( -1.20515 0.602669 )
Epeak [keV] : 102.736 ( )
Norm@50keV : 1.33131E-03 ( )
------------------------------------------------------------
# Chi-Squared = 53.47 using 59 PHA bins.
# Reduced chi-squared = 0.9548 for 56 degrees of freedom
# Null hypothesis probability = 5.711756e-01
Photon flux (15-150 keV) in 30.96 sec: 0.165071 ( -0.030421 0.030048 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.32009e-07 ( -7.7478e-08 7.49573e-08 ) ergs/cm2
Band function
Time interval is from -0.972 sec. to 29.984 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.58107 ( -0.145491 -0.145491 )
beta : -1.90545 ( 1.89605 0.36031 )
Epeak [keV] : 20.3572 ( -22.1288 204.712 )
Norm@50keV : 6.40252 ( -6.35022 1827.37 )
------------------------------------------------------------
# Chi-Squared = 53.34 using 59 PHA bins.
# Reduced chi-squared = 0.9698 for 55 degrees of freedom
# Null hypothesis probability = 5.384197e-01
Photon flux (15-150 keV) in 30.96 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] : 10.1191 (-2.51883 3.67539)
R^2/D10^2 : 7.14409E-02 (-0.0483763 0.140539)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.36 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 57 degrees of freedom
# Null hypothesis probability = 2.347262e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.631e-08 1.771e-08
25- 50 1.171e-07 4.081e-08
50-150 6.322e-08 3.213e-08
15-150 2.266e-07 6.819e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 89.7329 (-42.8992 -89.7289)
Norm : 0.745698 (-0.17729 0.25848)
------------------------------------------------------------
# Chi-Squared = 54.13 using 59 PHA bins.
# Reduced chi-squared = 0.9496 for 57 degrees of freedom
# Null hypothesis probability = 5.835997e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.023e-08 1.646e-08
25- 50 1.018e-07 2.615e-08
50-150 1.547e-07 1.086e-07
15-150 3.168e-07 1.382e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.66886 (-2.06873 2.45701)
R1^2/D10^2 : 0.493970 (-0.36283 2.71268)
kT2 [keV] : 23.9907 (-9.17622 34.0905)
R2^2/D10^2 : 2.27952E-03 (-0.00212238 0.0116228)
------------------------------------------------------------
# Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9598 for 55 degrees of freedom
# Null hypothesis probability = 5.596265e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.712e-08 3.916e-08
25- 50 9.269e-08 4.920e-08
50-150 1.754e-07 1.050e-07
15-150 3.352e-07 1.799e-07
Peak spectrum fit
Power-law model
Time interval is from 0.120 sec. to 1.120 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64895 ( -0.317603 0.333431 )
Norm@50keV : 7.40938E-03 ( -0.00151296 0.00147503 )
------------------------------------------------------------
# Chi-Squared = 43.40 using 59 PHA bins.
# Reduced chi-squared = 0.7615 for 57 degrees of freedom
# Null hypothesis probability = 9.078846e-01
Photon flux (15-150 keV) in 1 sec: 0.967146 ( -0.18031 0.180467 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.89173e-08 ( -1.46907e-08 1.50011e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.120 sec. to 1.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37938 ( -1.50069 0.591893 )
Epeak [keV] : 108.066 ( -108.081 -108.081 )
Norm@50keV : 1.03490E-02 ( )
------------------------------------------------------------
# Chi-Squared = 43.25 using 59 PHA bins.
# Reduced chi-squared = 0.7724 for 56 degrees of freedom
# Null hypothesis probability = 8.936195e-01
Photon flux (15-150 keV) in 1 sec: 0.958615 ( -0.18456 0.183605 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.74551e-08 ( -1.63382e-08 1.60545e-08 ) ergs/cm2
Band function
Time interval is from 0.120 sec. to 1.120 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.05816 ( 1.03819 1.03819 )
beta : -1.81273 ( 1.81181 0.461907 )
Epeak [keV] : 61.3034 ( -58.3896 -58.3896 )
Norm@50keV : 1.67029E-02 ( -0.0187841 601.843 )
------------------------------------------------------------
# Chi-Squared = 43.11 using 59 PHA bins.
# Reduced chi-squared = 0.7838 for 55 degrees of freedom
# Null hypothesis probability = 8.775396e-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] : 12.4592 (-2.73695 3.68837)
R^2/D10^2 : 0.206708 (-0.12543 0.29983)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.42 using 59 PHA bins.
# Reduced chi-squared = 0.8846 for 57 degrees of freedom
# Null hypothesis probability = 7.185346e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.802e-09 2.558e-09
25- 50 2.235e-08 7.015e-09
50-150 2.138e-08 9.176e-09
15-150 5.053e-08 1.468e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 146.437 ( )
Norm : 4.02668 (-0.808873 1.08332)
------------------------------------------------------------
# Chi-Squared = 43.26 using 59 PHA bins.
# Reduced chi-squared = 0.7590 for 57 degrees of freedom
# Null hypothesis probability = 9.104906e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.757e-09 5.490e-09
25- 50 1.873e-08 1.065e-08
50-150 4.088e-08 2.278e-08
15-150 6.937e-08 3.841e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.39758 (-3.88139 4.18137)
R1^2/D10^2 : 0.973508 (-0.73217 1.16752)
kT2 [keV] : 28.4327 (-19.1366 -28.5125)
R2^2/D10^2 : 7.74808E-03 (-0.00761067 0.0870654)
------------------------------------------------------------
# Chi-Squared = 43.26 using 59 PHA bins.
# Reduced chi-squared = 0.7866 for 55 degrees of freedom
# Null hypothesis probability = 8.740465e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.004e-08 5.955e-09
25- 50 1.984e-08 1.040e-08
50-150 3.829e-08 2.269e-08
15-150 6.817e-08 3.505e-08
Plot creation:
Fri Dec 30 05:01:48 EST 2011