batgrbproduct Analysis for Trigger=524128
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): Tue Jun 12 18:01:23 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger524128/GCN5_download_cron
======================================================================
Trigger: 00524128 Segment: 000
BAT Trigger Time: 361159528 [s; MET]
Trigger Stop: 361159592 [s; MET]
UTC: 2012-06-12T02:05:19.691840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 126.726052283175 Dec: -17.577825111582 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.4
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.4
Flight Position: [ source = BAT ]
RA: 126.726052283175 Dec: -17.577825111582 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 126.722853166093 Dec: -17.5980540996963 [deg; J2000]
{ 08h 26m 53.5s , -17d 35' 53.0" }
+/- 1.69674106498827 [arcmin] (estimated 90% radius based on SNR)
+/- 0.677589999137225 [arcmin] (formal 1-sigma fit error)
SNR: 14.2921029494806
Angular difference between Flight and Ground position is 1.227454 arcmin
Partial Coding Fraction: 0.671875 [ including projection effects ]
Duration
T90: 90.2159999012947 +/- 13.615228106164
Measured from: 22.8960001468658
to: 113.112000048161 [s; relative to TRIGTIME]
T50: 40.7719998955727 +/- 9.62589526483398
Measured from: 35.0440001487732
to: 75.8160000443459 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 30.1999999880791
to: 31.1999999880791 [s; relative to TRIGTIME]
Total Fluence
Measured from: 16.972000002861
to: 125.364000022411 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.486372 0.731705 0.640645 0.140100
0.064087 0.066531 0.059245 0.053297 [error]
Peak 0.012838 0.016519 0.018571 0.018309
0.006579 0.006879 0.006267 0.005586 [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 1.52e-07 3.05e-07 4.77e-07 1.65e-06 1.33e-06 2.58e-06 erg/cm2
Error 2.55e-08 3.15e-08 5.74e-08 4.26e-07 1.43e-07 4.68e-07 erg/cm2
Peak flux Power-law 9.92e-02 1.39e-01 1.44e-01 2.74e-01 4.69e-01 6.56e-01 ph/cm2/s
Error 7.56e-02 6.36e-02 4.94e-02 2.40e-01 1.61e-01 2.42e-01 ph/cm2/s
Fluence Cutoff-PL 1.32e-07 3.31e-07 5.01e-07 5.61e-07 1.53e-06 0.00e+00 erg/cm2
Error 3.04e-08 3.94e-08 6.52e-08 5.53e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 9.95e-02 1.39e-01 1.44e-01 2.72e-01 4.69e-01 6.53e-01 ph/cm2/s
Error 7.59e-02 6.35e-02 5.13e-02 2.55e-01 3.15e-01 2.37e-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 1.356 0.162 - - 1.27e-03 1.23e-04 50.360 57
CPL 0.535 0.750 90.0 96.8 3.27e-03 3.32e-03 46.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.948 0.686 - - 4.08e-03 1.41e-03 50.840 57
CPL 0.961 0.772 9999.4 0.0 4.12e-03 1.09e-02 50.850 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: 39.552000 sec.
T50 in the 50-300 keV band: 22.464000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 108.392 16.972 125.364
T90 90.216 22.896 113.112
T50 40.772 35.044 75.816
Peak 1.000 30.200 31.200
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
126.7229 -17.5981 0.0135 27.3 150.9 1.6219 14.3 TRIG_00524128
------------------------------------------
Foreground time interval of the image:
16.972 78.901 (delta_t = 61.929 [sec])
Background time interval of the image:
-239.000 16.972 (delta_t = 255.972 [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
Multiple GTIs in the spectrum
tstart tstop
16.972000 85.690000
87.000000 125.364000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35552 ( -0.162525 0.161836 )
Norm@50keV : 1.27388E-03 ( -0.000122999 0.000122813 )
------------------------------------------------------------
# Chi-Squared = 50.36 using 59 PHA bins.
# Reduced chi-squared = 0.8835 for 57 degrees of freedom
# Null hypothesis probability = 7.206884e-01
Photon flux (15-150 keV) in 107.1 sec: 0.153641 ( -0.0150171 0.0150409 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33087e-06 ( -1.42093e-07 1.43441e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
16.972000 85.690000
87.000000 125.364000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.535273 ( -0.818543 0.681159 )
Epeak [keV] : 90.0303 ( -23.3721 170.193 )
Norm@50keV : 3.27382E-03 ( -0.00174961 0.00489009 )
------------------------------------------------------------
# Chi-Squared = 46.00 using 59 PHA bins.
# Reduced chi-squared = 0.8215 for 56 degrees of freedom
# Null hypothesis probability = 8.273305e-01
Photon flux (15-150 keV) in 107.1 sec: 0.148234 ( -0.015752 0.015719 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52539e-06 ( -3.40931e-07 7.65604e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
16.972000 85.690000
87.000000 125.364000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.535185 ( -0.426812 0.515092 )
beta : -10.00000 ( 9.9421e+10 9.9421e+10 )
Epeak [keV] : 90.0130 ( -23.3689 170.164 )
Norm@50keV : 3.27413E-03 ( -0.00174998 0.00489419 )
------------------------------------------------------------
# Chi-Squared = 46.00 using 59 PHA bins.
# Reduced chi-squared = 0.8364 for 55 degrees of freedom
# Null hypothesis probability = 8.010258e-01
Photon flux (15-150 keV) in 107.1 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] : 16.0831 (-1.78795 2.07987)
R^2/D10^2 : 1.43032E-02 (-0.00491265 0.00722371)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.234843e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.183e-08 1.557e-08
25- 50 3.459e-07 4.525e-08
50-150 6.266e-07 1.174e-07
15-150 1.054e-06 1.316e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.997 ( )
Norm : 0.636927 (-0.636927 -0.636927)
------------------------------------------------------------
# Chi-Squared = 51.64 using 59 PHA bins.
# Reduced chi-squared = 0.9060 for 57 degrees of freedom
# Null hypothesis probability = 6.755385e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.698e-07 8.932e-08
25- 50 3.267e-07 1.750e-07
50-150 7.165e-07 3.814e-07
15-150 1.213e-06 6.442e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.17716 (-3.59993 4.26884)
R1^2/D10^2 : 7.58331E-02 (-0.0498219 0.151452)
kT2 [keV] : 25.1508 (-6.97348 35.8517)
R2^2/D10^2 : 2.35244E-03 (-0.0022232 0.00615319)
------------------------------------------------------------
# Chi-Squared = 46.05 using 59 PHA bins.
# Reduced chi-squared = 0.8372 for 55 degrees of freedom
# Null hypothesis probability = 7.996366e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.274e-07 7.058e-08
25- 50 3.384e-07 1.557e-07
50-150 7.871e-07 4.171e-07
15-150 1.253e-06 6.142e-07
Peak spectrum fit
Power-law model
Time interval is from 30.200 sec. to 31.200 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.948076 ( -0.747325 0.62557 )
Norm@50keV : 4.07929E-03 ( -0.00146373 0.00135769 )
------------------------------------------------------------
# Chi-Squared = 50.84 using 59 PHA bins.
# Reduced chi-squared = 0.8919 for 57 degrees of freedom
# Null hypothesis probability = 7.041359e-01
Photon flux (15-150 keV) in 1 sec: 0.468645 ( -0.160069 0.161674 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.49512e-08 ( -1.54329e-08 1.5615e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 30.200 sec. to 31.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.960796 ( -0.931312 0.612621 )
Epeak [keV] : 9999.36 ( -9999.95 -9999.95 )
Norm@50keV : 4.11641E-03 ( -0.0014374 0.0202905 )
------------------------------------------------------------
# Chi-Squared = 50.85 using 59 PHA bins.
# Reduced chi-squared = 0.9080 for 56 degrees of freedom
# Null hypothesis probability = 6.697559e-01
Photon flux (15-150 keV) in 1 sec: 0.468863 ( -0.468863 0.160981 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15177e-07 ( -7.55985e-08 1.09935e-07 ) ergs/cm2
Band function
Time interval is from 30.200 sec. to 31.200 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.836684 ( 0.836763 0.836763 )
beta : -0.948195 ( 0.948038 0.747343 )
Epeak [keV] : 28.5010 ( -28.3974 -28.3974 )
Norm@50keV : 6.30671E-03 ( -0.00353367 0.73286 )
------------------------------------------------------------
# Chi-Squared = 50.84 using 59 PHA bins.
# Reduced chi-squared = 0.9243 for 55 degrees of freedom
# Null hypothesis probability = 6.343300e-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] : 26.5239 (-11.2674 36.8155)
R^2/D10^2 : 9.17973E-03 (-0.0091273 0.0423635)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 53.88 using 59 PHA bins.
# Reduced chi-squared = 0.9453 for 57 degrees of freedom
# Null hypothesis probability = 5.927199e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.086e-09 7.175e-10
25- 50 6.345e-09 3.862e-09
50-150 3.274e-08 2.106e-08
15-150 4.018e-08 2.478e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-106.332 -199.984)
Norm : 1.94826 (-0.661213 0.661243)
------------------------------------------------------------
# Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9426 for 57 degrees of freedom
# Null hypothesis probability = 5.984892e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.851e-09 2.924e-09
25- 50 9.332e-09 5.670e-09
50-150 2.047e-08 1.302e-08
15-150 3.465e-08 2.107e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.17920 (-7.21096 17.481)
R1^2/D10^2 : 0.397277 (-0.379932 44009.2)
kT2 [keV] : 50.2243 (-34.2306 -50.8076)
R2^2/D10^2 : 1.44019E-03 (-0.00133479 0.014496)
------------------------------------------------------------
# Chi-Squared = 50.62 using 59 PHA bins.
# Reduced chi-squared = 0.9204 for 55 degrees of freedom
# Null hypothesis probability = 6.424140e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.770e-09 2.478e-09
25- 50 7.710e-09 4.374e-09
50-150 3.597e-08 2.176e-08
15-150 4.745e-08 2.285e-08
Plot creation:
Tue Jun 12 18:17:22 EDT 2012