batgrbproduct Analysis for Trigger=360068
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 Aug 16 09:56:40 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger360068/GCN5_download_cron
======================================================================
Trigger: 00360068 Segment: 000
BAT Trigger Time: 272071304.256 [s; MET]
Trigger Stop: 272071304.768 [s; MET]
UTC: 2009-08-15T23:21:39.254980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 64.473057422274 Dec: -65.9079370199645 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.24
Image Trigger?: NO
Rate S/N Ratio: 9.8488578017961 [ if not an image trigger ]
Image S/N Ratio: 6.24
Flight Position: [ source = BAT ]
RA: 64.473057422274 Dec: -65.9079370199645 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 64.4898356674113 Dec: -65.9426407948409 [deg; J2000]
{ 04h 17m 57.6s , -65d 56' 33.5" }
+/- 2.74908112909581 [arcmin] (estimated 90% radius based on SNR)
+/- 1.30923995140935 [arcmin] (formal 1-sigma fit error)
SNR: 7.17311155190179
Angular difference between Flight and Ground position is 2.122335 arcmin
Partial Coding Fraction: 0.765625 [ including projection effects ]
Duration
T90: 0.576000034809113 +/- 0.271529006335861
Measured from: -0.0319998860359192
to: 0.544000148773193 [s; relative to TRIGTIME]
T50: 0.255999982357025 +/- 0.143108374017273
Measured from: 0.160000145435333
to: 0.416000127792358 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.180000007152557
to: 0.819999992847443 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0320000052452087
to: 0.671999990940094 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.008696 0.018485 0.025174 0.006284
0.005074 0.005396 0.004830 0.004138 [error]
Peak 0.008696 0.018485 0.025174 0.006284
0.005074 0.005396 0.004830 0.004138 [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 2.86e-09 7.60e-09 1.62e-08 8.99e-08 4.38e-08 1.17e-07 erg/cm2
Error 1.59e-09 2.55e-09 4.36e-09 5.88e-08 1.17e-08 6.02e-08 erg/cm2
Peak flux Power-law 1.30e-01 1.86e-01 1.99e-01 3.95e-01 6.37e-01 9.09e-01 ph/cm2/s
Error 7.30e-02 6.46e-02 5.22e-02 2.34e-01 1.70e-01 2.55e-01 ph/cm2/s
Fluence Cutoff-PL 2.39e-09 7.83e-09 1.74e-08 4.33e-08 4.27e-08 8.58e-08 erg/cm2
Error 1.96e-09 2.89e-09 5.61e-09 7.84e-08 1.25e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.07e-01 1.90e-01 2.14e-01 2.26e-01 6.20e-01 7.37e-01 ph/cm2/s
Error 8.91e-02 5.38e-02 6.95e-02 2.86e-01 1.77e-01 3.50e-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 0.904 0.467 - - 5.55e-03 1.49e-03 52.030 57
CPL 0.260 1.485 161.8 0.0 1.04e-02 1.06e-01 51.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.904 0.467 - - 5.55e-03 1.49e-03 52.030 57
CPL 0.260 1.485 161.8 0.0 1.04e-02 8.38e-02 51.750 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 0.704 -0.032 0.672
T90 0.576 -0.032 0.544
T50 0.256 0.160 0.416
Peak 1.000 -0.180 0.820
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
64.4898 -65.9426 0.0268 20.1 126.0 0.0705 7.2 TRIG_00360068
------------------------------------------
Foreground time interval of the image:
-0.032 0.672 (delta_t = 0.704 [sec])
Background time interval of the image:
-60.256 -0.032 (delta_t = 60.224 [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 -0.032 sec. to 0.672 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.904260 ( -0.49282 0.440587 )
Norm@50keV : 5.55151E-03 ( -0.00150927 0.00146358 )
------------------------------------------------------------
# Chi-Squared = 52.03 using 59 PHA bins.
# Reduced chi-squared = 0.9128 for 57 degrees of freedom
# Null hypothesis probability = 6.615936e-01
Photon flux (15-150 keV) in 0.704 sec: 0.637224 ( -0.169395 0.171194 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.37899e-08 ( -1.16306e-08 1.17335e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 0.672 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.259658 ( -3.2295 -0.259539 )
Epeak [keV] : 161.797 ( -161.773 -161.773 )
Norm@50keV : 1.03981E-02 ( -0.0103997 0.201906 )
------------------------------------------------------------
# Chi-Squared = 51.75 using 59 PHA bins.
# Reduced chi-squared = 0.9241 for 56 degrees of freedom
# Null hypothesis probability = 6.363867e-01
Photon flux (15-150 keV) in 0.704 sec: 0.619817 ( -0.181732 0.178586 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.26713e-08 ( -1.26881e-08 1.22991e-08 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 0.672 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.125589 ( 0.789618 0.789618 )
beta : -1.48897 ( 1.48086 1.48086 )
Epeak [keV] : 141.279 ( -141.26 330.273 )
Norm@50keV : 1.19305E-02 ( -0.0119504 400937 )
------------------------------------------------------------
# Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9395 for 55 degrees of freedom
# Null hypothesis probability = 6.025016e-01
Photon flux (15-150 keV) in 0.704 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] : 23.6845 (-6.42929 11.3819)
R^2/D10^2 : 1.87515E-02 (-0.0130265 0.0326812)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.71 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 57 degrees of freedom
# Null hypothesis probability = 6.365431e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.323e-09 8.016e-10
25- 50 7.294e-09 3.754e-09
50-150 3.052e-08 1.737e-08
15-150 3.913e-08 2.075e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.999 ( )
Norm : 2.62411 (-2.62411 -2.62411)
------------------------------------------------------------
# Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.474680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.595e-09 2.683e-09
25- 50 8.839e-09 4.998e-09
50-150 1.939e-08 1.144e-08
15-150 3.282e-08 1.874e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.33137 (-1.79981 35.7355)
R1^2/D10^2 : 8411.96 ( )
kT2 [keV] : 24.6652 (-6.88978 12.5732)
R2^2/D10^2 : 1.63071E-02 (-0.0115903 0.0161365)
------------------------------------------------------------
# Chi-Squared = 51.23 using 59 PHA bins.
# Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.9314 for 55 degrees of freedom
# Reduced chi-squared = 0.9291 for 55 degrees of freedom
# Null hypothesis probability = 6.195660e-01
# Null hypothesis probability = 6.244324e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.336e-09 1.099e-09
25- 50 6.804e-09 4.102e-09
50-150 3.126e-08 1.976e-08
15-150 4.040e-08 2.311e-08
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.032 sec. to 0.672 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.904260 ( -0.49282 0.440587 )
Norm@50keV : 5.55151E-03 ( -0.00150927 0.00146358 )
------------------------------------------------------------
# Chi-Squared = 52.03 using 59 PHA bins.
# Reduced chi-squared = 0.9128 for 57 degrees of freedom
# Null hypothesis probability = 6.615936e-01
Photon flux (15-150 keV) in 0.704 sec: 0.637209 ( -0.169379 0.171198 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.37899e-08 ( -1.16306e-08 1.17335e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 0.672 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.259658 ( -3.2295 -0.259539 )
Epeak [keV] : 161.797 ( -161.773 -161.773 )
Norm@50keV : 1.03981E-02 ( -0.0103997 0.157259 )
------------------------------------------------------------
# Chi-Squared = 51.75 using 59 PHA bins.
# Reduced chi-squared = 0.9241 for 56 degrees of freedom
# Null hypothesis probability = 6.363867e-01
Photon flux (15-150 keV) in 0.704 sec: 0.619824 ( -0.181739 0.171841 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.26716e-08 ( -1.26883e-08 1.23174e-08 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 0.672 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.102577 ( 0.789618 0.789618 )
beta : -1.46912 ( 1.47367 1.47367 )
Epeak [keV] : 138.332 ( -138.353 303.745 )
Norm@50keV : 1.22518E-02 ( -0.0122544 64.0213 )
------------------------------------------------------------
# Chi-Squared = 51.67 using 59 PHA bins.
# Reduced chi-squared = 0.9395 for 55 degrees of freedom
# Null hypothesis probability = 6.025101e-01
Photon flux (15-150 keV) in 0.704 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] : 23.6845 (-6.42929 11.3819)
R^2/D10^2 : 1.87515E-02 (-0.0130265 0.0326812)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.71 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 57 degrees of freedom
# Null hypothesis probability = 6.365431e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.323e-09 8.532e-10
25- 50 7.294e-09 4.323e-09
50-150 3.052e-08 1.704e-08
15-150 3.913e-08 2.353e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.999 ( )
Norm : 2.62410 (-2.6241 -2.6241)
------------------------------------------------------------
# Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.474680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.595e-09 2.610e-09
25- 50 8.839e-09 5.231e-09
50-150 1.939e-08 1.135e-08
15-150 3.282e-08 1.943e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.33137 (-1.79981 36.4856)
R1^2/D10^2 : 8411.96 ( )
kT2 [keV] : 24.6652 (-6.88978 12.5732)
R2^2/D10^2 : 1.63071E-02 (-0.0115903 0.0161366)
------------------------------------------------------------
# Chi-Squared = 51.23 using 59 PHA bins.
# Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.9314 for 55 degrees of freedom
# Reduced chi-squared = 0.9291 for 55 degrees of freedom
# Null hypothesis probability = 6.195660e-01
# Null hypothesis probability = 6.244324e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.336e-09 9.785e-10
25- 50 6.804e-09 4.075e-09
50-150 3.126e-08 1.861e-08
15-150 4.040e-08 2.374e-08
Plot creation:
Sun Aug 16 10:08:34 EDT 2009