batgrbproduct Analysis for Trigger=555600
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): Sun May 12 08:40:48 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger555600/GCN5_download_cron
======================================================================
Trigger: 00555600 Segment: 000
BAT Trigger Time: 389964657.984 [s; MET]
Trigger Stop: 389964658.496 [s; MET]
UTC: 2013-05-11T11:30:47.441540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 196.638702463752 Dec: 18.6976486270083 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.07
Image Trigger?: NO
Rate S/N Ratio: 17.0293863659264 [ if not an image trigger ]
Image S/N Ratio: 9.07
Flight Position: [ source = BAT ]
RA: 196.638702463752 Dec: 18.6976486270083 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 196.653489157516 Dec: 18.7060113743111 [deg; J2000]
{ 13h 06m 36.8s , +18d 42' 21.6" }
+/- 2.26952800812972 [arcmin] (estimated 90% radius based on SNR)
+/- 1.33492716766462 [arcmin] (formal 1-sigma fit error)
SNR: 9.43276527383096
Angular difference between Flight and Ground position is 0.978759 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 5.42799991369247 +/- 2.21218447342499
Measured from: -0.00399988889694214
to: 5.42400002479553 [s; relative to TRIGTIME]
T50: 2.39599996805191 +/- 0.807534529410091
Measured from: 0.212000072002411
to: 2.60800004005432 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0860000252723694
to: 0.913999974727631 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0720000267028809
to: 5.9879999756813 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.106186 0.125234 0.089873 0.053238
0.019170 0.019977 0.017748 0.016522 [error]
Peak 0.050127 0.060517 0.048207 0.011670
0.008412 0.009046 0.008099 0.007026 [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 2.47e-08 5.02e-08 7.96e-08 2.80e-07 2.21e-07 4.35e-07 erg/cm2
Error 7.48e-09 9.12e-09 1.74e-08 1.38e-07 4.30e-08 1.50e-07 erg/cm2
Peak flux Power-law 3.98e-01 4.15e-01 3.07e-01 3.65e-01 1.26e+00 1.48e+00 ph/cm2/s
Error 1.09e-01 7.16e-02 6.46e-02 1.57e-01 2.07e-01 2.52e-01 ph/cm2/s
Fluence Cutoff-PL 2.49e-08 5.03e-08 7.94e-08 2.76e-07 2.20e-07 4.30e-07 erg/cm2
Error 7.55e-09 9.47e-09 1.75e-08 1.78e-07 4.33e-08 1.45e-07 erg/cm2
Peak flux Cutoff-PL 3.90e-01 4.24e-01 3.10e-01 2.91e-01 1.25e+00 1.41e+00 ph/cm2/s
Error 1.18e-01 8.45e-02 5.26e-02 2.33e-01 2.10e-01 3.13e-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 1.335 0.307 - - 3.72e-03 6.35e-04 49.630 57
CPL 1.331 0.389 9999.2 0.0 3.73e-03 3.83e-03 49.640 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.438 0.281 - - 1.03e-02 1.73e-03 65.060 57
CPL 1.276 1.110 210.4 0.0 1.25e-02 2.09e-02 64.970 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: 3.008000 sec.
T50 in the 50-300 keV band: 1.792000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 6.060 -0.072 5.988
T90 5.428 -0.004 5.424
T50 2.396 0.212 2.608
Peak 1.000 -0.086 0.914
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
196.6535 +18.7060 0.0203 23.4 64.3 0.3475 9.4 TRIG_00555600
------------------------------------------
Foreground time interval of the image:
-0.072 5.988 (delta_t = 6.060 [sec])
Background time interval of the image:
-239.984 -171.954 (delta_t = 68.030 [sec])
-170.984 -0.072 (delta_t = 170.912 [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 -0.072 sec. to 5.988 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33470 ( -0.310217 0.30456 )
Norm@50keV : 3.72285E-03 ( -0.000636351 0.000632787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.63 using 59 PHA bins.
# Reduced chi-squared = 0.8707 for 57 degrees of freedom
# Null hypothesis probability = 7.451093e-01
Photon flux (15-150 keV) in 6.06 sec: 0.447110 ( -0.0763669 0.0765078 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.2111e-07 ( -4.2539e-08 4.33628e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.072 sec. to 5.988 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33058 ( -0.470952 0.306987 )
Epeak [keV] : 9999.17 ( -9999.35 -9999.35 )
Norm@50keV : 3.73276E-03 ( -0.000631256 0.00702263 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.64 using 59 PHA bins.
# Reduced chi-squared = 0.8864 for 56 degrees of freedom
# Null hypothesis probability = 7.129746e-01
Photon flux (15-150 keV) in 6.06 sec: 0.447466 ( -0.076693 0.075986 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20351e-07 ( -4.31454e-08 4.34811e-08 ) ergs/cm2
Band function
Time interval is from -0.072 sec. to 5.988 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.87325 ( -4.87325 -4.87325 )
beta : -1.46826 ( -0.425534 0.361317 )
Epeak [keV] : 26.4289 ( -26.4289 7.11095 )
Norm@50keV : 206.346 ( -34.4478 1.57867e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.49 using 59 PHA bins.
# Reduced chi-squared = 0.8817 for 55 degrees of freedom
# Null hypothesis probability = 7.198523e-01
Photon flux (15-150 keV) in 6.06 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] : 15.8218 (-3.7823 5.46564)
R^2/D10^2 : 4.19138E-02 (-0.0261041 0.0652825)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.75 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.101896e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.318e-08 4.954e-09
25- 50 5.492e-08 1.748e-08
50-150 9.569e-08 3.615e-08
15-150 1.638e-07 4.793e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.83563 (-0.311135 0.311121)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.34 using 59 PHA bins.
# Reduced chi-squared = 0.9008 for 57 degrees of freedom
# Null hypothesis probability = 6.862430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.770e-08 1.605e-08
25- 50 5.329e-08 3.060e-08
50-150 1.169e-07 6.511e-08
15-150 1.979e-07 1.110e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.47697 (-2.63178 2.86017)
R1^2/D10^2 : 0.411580 (-0.31045 1.47235)
kT2 [keV] : 41.4817 (-33.8255 -41.5011)
R2^2/D10^2 : 1.62769E-03 (-0.00156696 0.010084)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.38 using 59 PHA bins.
# Reduced chi-squared = 0.8797 for 55 degrees of freedom
# Null hypothesis probability = 7.237130e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.600e-08 1.524e-08
25- 50 5.172e-08 2.915e-08
50-150 1.546e-07 8.411e-08
15-150 2.323e-07 1.203e-07
Peak spectrum fit
Power-law model
Time interval is from -0.086 sec. to 0.914 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43833 ( -0.280758 0.280829 )
Norm@50keV : 1.02587E-02 ( -0.00173504 0.00171701 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.06 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 57 degrees of freedom
# Null hypothesis probability = 2.166065e-01
Photon flux (15-150 keV) in 1 sec: 1.26062 ( -0.206628 0.206804 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.83829e-08 ( -1.83452e-08 1.87016e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.086 sec. to 0.914 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27617 ( -1.13419 1.08639 )
Epeak [keV] : 210.429 ( -210.469 -210.469 )
Norm@50keV : 1.25436E-02 ( -0.00396884 0.0378049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.97 using 59 PHA bins.
# Reduced chi-squared = 1.160 for 56 degrees of freedom
# Null hypothesis probability = 1.924747e-01
Photon flux (15-150 keV) in 1 sec: 1.25372 ( -0.20996 0.21027 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.6868e-08 ( -2.0788e-08 1.9937e-08 ) ergs/cm2
Band function
Time interval is from -0.086 sec. to 0.914 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99648 ( -4.99648 -4.99648 )
beta : -1.62802 ( -0.444523 0.343147 )
Epeak [keV] : 26.2996 ( -26.2996 6.77342 )
Norm@50keV : 807.901 ( -129.455 1.97438e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.44 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.288671e-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] : 13.5571 (-2.97702 4.21488)
R^2/D10^2 : 0.202735 (-0.201576 0.285269)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.80 using 59 PHA bins.
# Reduced chi-squared = 1.330 for 57 degrees of freedom
# Null hypothesis probability = 4.864070e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.891e-09 2.761e-09
25- 50 2.841e-08 8.000e-09
50-150 3.380e-08 1.354e-08
15-150 7.010e-08 1.859e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-90.5864 -199.363)
Norm : 5.17720 (-0.841196 0.841189)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.30 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 57 degrees of freedom
# Null hypothesis probability = 2.105176e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.289e-08 7.360e-09
25- 50 2.480e-08 1.415e-08
50-150 5.439e-08 3.095e-08
15-150 9.208e-08 5.235e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.65270 (-2.22846 2.88894)
R1^2/D10^2 : 1.13004 (-0.740107 2.4924)
kT2 [keV] : 36.4476 (-29.0855 -36.451)
R2^2/D10^2 : 5.68709E-03 (-0.00511967 0.028543)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.30 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 55 degrees of freedom
# Null hypothesis probability = 2.325955e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.260e-08 7.255e-09
25- 50 2.559e-08 1.379e-08
50-150 6.270e-08 3.386e-08
15-150 1.009e-07 5.205e-08
Plot creation:
Sun May 12 08:56:14 EDT 2013