batgrbproduct Analysis for Trigger=355590
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): Wed Jun 24 09:19:22 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355590/GCN5_download_cron
======================================================================
Trigger: 00355590 Segment: 000
BAT Trigger Time: 267479234.624 [s; MET]
Trigger Stop: 267479235.648 [s; MET]
UTC: 2009-06-23T19:47:09.771900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.765782039606 Dec: 18.3012804516631 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.66
Image Trigger?: NO
Rate S/N Ratio: 8.66025403784439 [ if not an image trigger ]
Image S/N Ratio: 5.66
Flight Position: [ source = BAT ]
RA: 135.765782039606 Dec: 18.3012804516631 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.705526475613 Dec: 18.3298534045847 [deg; J2000]
{ 09h 02m 49.3s , +18d 19' 47.5" }
+/- 9.39638577745154 [arcmin] (estimated 90% radius based on SNR)
+/- 6.98567603811672 [arcmin] (formal 1-sigma fit error)
SNR: 1.23929393557158
Angular difference between Flight and Ground position is 3.836529 arcmin
Partial Coding Fraction: 0.7421875 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.009128 -0.001364 0.023414 0.014820
0.006155 0.006312 0.005942 0.006178 [error]
Peak -0.009128 -0.001364 0.023414 0.014820
0.006155 0.006312 0.005942 0.006178 [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 3.46e-10 2.08e-09 1.10e-08 2.63e-07 3.58e-08 2.65e-07 erg/cm2
Error 6.17e-10 2.28e-09 8.25e-09 3.72e-07 1.58e-08 3.76e-07 erg/cm2
Peak flux Power-law 1.05e-02 3.33e-02 8.80e-02 6.83e-01 2.40e-01 7.90e-01 ph/cm2/s
Error 1.90e-02 3.76e-02 6.69e-02 7.47e-01 1.81e-01 7.18e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 3.89e-03 2.84e-02 1.11e-01 2.00e-01 3.55e-01 0.00e+00 ph/cm2/s
Error 1.41e-02 3.19e-02 5.81e-02 6.16e-01 0.00e+00 0.00e+00 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 -0.408 1.405 - - 1.50e-03 1.38e-03 59.070 57
CPL -3.759 0.000 137.8 2844.7 1.22e-02 2.45e-02 57.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.408 1.405 - - 1.50e-03 1.38e-03 59.070 57
CPL -3.759 0.000 137.8 3326.2 1.22e-02 2.45e-02 57.650 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.7055 +18.3299 0.1554 21.2 -67.6 0.0155 1.2 TRIG_00355590
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.624 -10.624 (delta_t = 50.000 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.408292 ( -1.91532 0.894494 )
Norm@50keV : 1.49931E-03 ( -0.00149865 0.0012663 )
------------------------------------------------------------
# Chi-Squared = 59.07 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 3.996974e-01
Photon flux (15-150 keV) in 1.024 sec: 0.240203 ( -0.240203 0.120865 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58259e-08 ( -1.58412e-08 1.58411e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.75903 ( )
Epeak [keV] : 137.788 ( -137.591 5551.79 )
Norm@50keV : 1.21579E-02 ( -0.0123091 0.0367799 )
------------------------------------------------------------
# Chi-Squared = 57.65 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 56 degrees of freedom
# Null hypothesis probability = 4.138438e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.820424 ( 0.884157 0.884157 )
beta : 0.459961 ( -0.924547 1.88353 )
Epeak [keV] : 14.3222 ( -14.7391 -14.7391 )
Norm@50keV : 2.14127E-03 ( -0.00218334 62197.8 )
------------------------------------------------------------
# Chi-Squared = 59.08 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 55 degrees of freedom
# Null hypothesis probability = 3.288270e-01
Photon flux (15-150 keV) in 1.024 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] : 74.6303 ( )
R^2/D10^2 : 5.90061E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.44 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.223350e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.331 ( )
Norm : 0.578601 (-0.583184 0.587232)
------------------------------------------------------------
# Chi-Squared = 70.23 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 57 degrees of freedom
# Null hypothesis probability = 1.120704e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 56.6398 ( )
R1^2/D10^2 : 0.0 (0 1.01118)
kT2 [keV] : 63.9227 (-63.9227 -63.9227)
R2^2/D10^2 : 7.94328E-04 (-0.000794328 1.17559)
------------------------------------------------------------
# Chi-Squared = 58.42 using 59 PHA bins.
# Chi-Squared = 58.40 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Null hypothesis probability = 3.510184e-01
# Null hypothesis probability = 3.515985e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.408292 ( -1.91532 0.894494 )
Norm@50keV : 1.49931E-03 ( -0.00149865 0.0012663 )
------------------------------------------------------------
# Chi-Squared = 59.07 using 59 PHA bins.
# Reduced chi-squared = 1.036 for 57 degrees of freedom
# Null hypothesis probability = 3.996974e-01
Photon flux (15-150 keV) in 1.024 sec: 0.240203 ( -0.240203 0.120865 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58259e-08 ( -1.58412e-08 1.58411e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.75903 ( )
Epeak [keV] : 137.788 ( -137.591 6514.8 )
Norm@50keV : 1.21579E-02 ( -0.0123091 0.0367799 )
------------------------------------------------------------
# Chi-Squared = 57.65 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 56 degrees of freedom
# Null hypothesis probability = 4.138438e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.820424 ( 0.884157 0.884157 )
beta : 0.459961 ( -0.924547 1.88353 )
Epeak [keV] : 14.3222 ( -14.7391 -14.7391 )
Norm@50keV : 2.14127E-03 ( -0.00218334 62197.8 )
------------------------------------------------------------
# Chi-Squared = 59.08 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 55 degrees of freedom
# Null hypothesis probability = 3.288270e-01
Photon flux (15-150 keV) in 1.024 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] : 74.6303 ( )
R^2/D10^2 : 5.90061E-04 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.44 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.223350e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.331 ( )
Norm : 0.578601 (-0.583184 0.587232)
------------------------------------------------------------
# Chi-Squared = 70.23 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 57 degrees of freedom
# Null hypothesis probability = 1.120704e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 56.6398 ( )
R1^2/D10^2 : 0.0 (0 1.01118)
kT2 [keV] : 63.9227 (-63.9227 -63.9227)
R2^2/D10^2 : 7.94328E-04 (-0.000794328 1.17559)
------------------------------------------------------------
# Chi-Squared = 58.42 using 59 PHA bins.
# Chi-Squared = 58.40 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Null hypothesis probability = 3.510184e-01
# Null hypothesis probability = 3.515985e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Wed Jun 24 09:43:27 EDT 2009