batgrbproduct Analysis for Trigger=522578
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 May 22 00:14:55 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger522578/GCN5_download_cron
======================================================================
Trigger: 00522578 Segment: 000
BAT Trigger Time: 359272791.168 [s; MET]
Trigger Stop: 359272791.68 [s; MET]
UTC: 2012-05-21T05:59:42.937680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 148.69332117108 Dec: -49.4193802244313 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.48
Image Trigger?: NO
Rate S/N Ratio: 24.6981780704569 [ if not an image trigger ]
Image S/N Ratio: 11.48
Flight Position: [ source = BAT ]
RA: 148.69332117108 Dec: -49.4193802244313 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 148.692035532418 Dec: -49.4216243176308 [deg; J2000]
{ 09h 54m 46.1s , -49d 25' 17.8" }
+/- 1.72327973954668 [arcmin] (estimated 90% radius based on SNR)
+/- 0.708996773353121 [arcmin] (formal 1-sigma fit error)
SNR: 13.9787153930548
Angular difference between Flight and Ground position is 0.143692 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 0.451999962329865 +/- 0.0787908617123446
Measured from: 0.0400001406669617
to: 0.492000102996826 [s; relative to TRIGTIME]
T50: 0.223999917507172 +/- 0.0715541870086366
Measured from: 0.104000151157379
to: 0.328000068664551 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.208000004291534
to: 0.791999995708466 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0239999890327454
to: 0.560000002384186 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.017831 0.041831 0.040730 0.017287
0.004273 0.004700 0.004509 0.004018 [error]
Peak 0.011936 0.044956 0.048293 0.017521
0.005584 0.005963 0.005558 0.004869 [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 5.61e-09 1.42e-08 2.89e-08 1.48e-07 7.80e-08 1.97e-07 erg/cm2
Error 1.40e-09 2.10e-09 4.14e-09 4.93e-08 1.10e-08 5.16e-08 erg/cm2
Peak flux Power-law 1.73e-01 2.55e-01 2.80e-01 5.81e-01 8.85e-01 1.29e+00 ph/cm2/s
Error 5.23e-02 4.74e-02 4.23e-02 1.90e-01 1.29e-01 2.13e-01 ph/cm2/s
Fluence Cutoff-PL 4.99e-09 1.48e-08 3.03e-08 7.38e-08 1.24e-07 0.00e+00 erg/cm2
Error 1.68e-09 2.38e-09 4.77e-09 7.96e-08 8.03e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.20e-01 2.63e-01 3.18e-01 2.23e-01 8.37e-01 9.24e-01 ph/cm2/s
Error 6.26e-02 5.60e-02 5.42e-02 1.93e-01 1.35e-01 2.36e-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 0.978 0.221 - - 1.34e-02 1.66e-03 49.970 57
CPL 0.460 0.821 164.4 0.0 2.31e-02 2.49e-02 48.780 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.861 0.247 - - 7.71e-03 1.13e-03 44.590 57
CPL -0.377 1.221 113.3 138.1 2.58e-02 4.00e-02 40.270 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: 0.320000 sec.
T50 in the 50-300 keV band: 0.192000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.536 0.024 0.560
T90 0.452 0.040 0.492
T50 0.224 0.104 0.328
Peak 1.000 -0.208 0.792
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
148.6920 -49.4216 0.0137 13.1 -32.8 0.1107 14.0 TRIG_00522578
------------------------------------------
Foreground time interval of the image:
0.024 0.560 (delta_t = 0.536 [sec])
Background time interval of the image:
-239.168 0.024 (delta_t = 239.192 [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 0.024 sec. to 0.560 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.978034 ( -0.224896 0.217934 )
Norm@50keV : 1.33522E-02 ( -0.00166458 0.00165957 )
------------------------------------------------------------
# Chi-Squared = 49.97 using 59 PHA bins.
# Reduced chi-squared = 0.8767 for 57 degrees of freedom
# Null hypothesis probability = 7.337118e-01
Photon flux (15-150 keV) in 0.536 sec: 1.53560 ( -0.192766 0.193123 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.80025e-08 ( -1.08816e-08 1.10245e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.024 sec. to 0.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.460195 ( -0.979142 0.662652 )
Epeak [keV] : 164.353 ( -164.353 -164.353 )
Norm@50keV : 2.30849E-02 ( -0.0110417 0.0387993 )
------------------------------------------------------------
# Chi-Squared = 48.78 using 59 PHA bins.
# Reduced chi-squared = 0.8712 for 56 degrees of freedom
# Null hypothesis probability = 7.420677e-01
Photon flux (15-150 keV) in 0.536 sec: 1.49876 ( -0.20171 0.20135 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23836e-07 ( -4.74349e-08 1.13258e-07 ) ergs/cm2
Band function
Time interval is from 0.024 sec. to 0.560 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.460148 ( -0.513758 0.964183 )
beta : -10.00000 ( 1.05329e+15 1.05329e+15 )
Epeak [keV] : 164.325 ( -75.1081 -164.325 )
Norm@50keV : 2.30856E-02 ( -0.0109062 0.038851 )
------------------------------------------------------------
# Chi-Squared = 48.78 using 59 PHA bins.
# Reduced chi-squared = 0.8870 for 55 degrees of freedom
# Null hypothesis probability = 7.096252e-01
Photon flux (15-150 keV) in 0.536 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] : 21.4454 (-3.5859 4.56519)
R^2/D10^2 : 5.91854E-02 (-0.0263222 0.0457755)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 56.69 using 59 PHA bins.
# Reduced chi-squared = 0.9945 for 57 degrees of freedom
# Null hypothesis probability = 4.867630e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.731e-09 6.971e-10
25- 50 1.422e-08 3.275e-09
50-150 4.882e-08 1.125e-08
15-150 6.578e-08 1.460e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 6.10172 (-6.10172 -6.10172)
------------------------------------------------------------
# Chi-Squared = 66.65 using 59 PHA bins.
# Reduced chi-squared = 1.169 for 57 degrees of freedom
# Null hypothesis probability = 1.790860e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.140e-09 4.443e-09
25- 50 1.566e-08 8.461e-09
50-150 3.434e-08 1.868e-08
15-150 5.814e-08 3.187e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.95072 (-3.37302 4.99483)
R1^2/D10^2 : 0.480132 (-0.340683 1.55764)
kT2 [keV] : 34.3875 (-10.415 44.9931)
R2^2/D10^2 : 1.15592E-02 (-0.0104304 0.0261619)
------------------------------------------------------------
# Chi-Squared = 47.36 using 59 PHA bins.
# Reduced chi-squared = 0.8611 for 55 degrees of freedom
# Null hypothesis probability = 7.582734e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.053e-09 2.846e-09
25- 50 1.526e-08 7.834e-09
50-150 5.651e-08 2.959e-08
15-150 7.682e-08 3.974e-08
Peak spectrum fit
Power-law model
Time interval is from -0.208 sec. to 0.792 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.860861 ( -0.253089 0.241621 )
Norm@50keV : 7.70866E-03 ( -0.0011372 0.00112889 )
------------------------------------------------------------
# Chi-Squared = 44.59 using 59 PHA bins.
# Reduced chi-squared = 0.7823 for 57 degrees of freedom
# Null hypothesis probability = 8.841066e-01
Photon flux (15-150 keV) in 1 sec: 0.884793 ( -0.129219 0.129694 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.78589e-08 ( -1.35383e-08 1.36847e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.208 sec. to 0.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.377138 ( -1.39844 1.04391 )
Epeak [keV] : 113.339 ( -32.0302 244.216 )
Norm@50keV : 2.58191E-02 ( -0.0162236 0.0636802 )
------------------------------------------------------------
# Chi-Squared = 40.27 using 59 PHA bins.
# Reduced chi-squared = 0.7192 for 56 degrees of freedom
# Null hypothesis probability = 9.439462e-01
Photon flux (15-150 keV) in 1 sec: 0.836803 ( -0.134568 0.135456 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09977e-07 ( -3.42472e-08 9.3781e-08 ) ergs/cm2
Band function
Time interval is from -0.208 sec. to 0.792 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.377250 ( -0.846378 1.61049 )
beta : -10.00000 ( 1.29655e+11 1.29655e+11 )
Epeak [keV] : 113.322 ( -32.0268 244.222 )
Norm@50keV : 2.58244E-02 ( -0.0162307 0.0637452 )
------------------------------------------------------------
# Chi-Squared = 40.27 using 59 PHA bins.
# Reduced chi-squared = 0.7323 for 55 degrees of freedom
# Null hypothesis probability = 9.316627e-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] : 23.6353 (-3.97166 5.1845)
R^2/D10^2 : 2.66394E-02 (-0.0119559 0.020321)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 41.68 using 59 PHA bins.
# Reduced chi-squared = 0.7313 for 57 degrees of freedom
# Null hypothesis probability = 9.362440e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.661e-09 8.430e-10
25- 50 1.466e-08 3.639e-09
50-150 6.107e-08 1.591e-08
15-150 7.839e-08 1.794e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.998 ( )
Norm : 3.50313 (-3.50313 -3.50313)
------------------------------------------------------------
# Chi-Squared = 64.08 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 57 degrees of freedom
# Null hypothesis probability = 2.420333e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.717e-09 4.787e-09
25- 50 1.677e-08 9.245e-09
50-150 3.677e-08 2.044e-08
15-150 6.226e-08 3.408e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.91832 (-8.89145 -8.89145)
R1^2/D10^2 : 0.158448 (-0.159332 -0.159332)
kT2 [keV] : 28.6943 (-28.6783 -28.6783)
R2^2/D10^2 : 1.31027E-02 (-0.0131322 0.021543)
------------------------------------------------------------
# Chi-Squared = 39.55 using 59 PHA bins.
# Reduced chi-squared = 0.7191 for 55 degrees of freedom
# Null hypothesis probability = 9.422868e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.176e-09 2.568e-09
25- 50 1.561e-08 8.210e-09
50-150 6.393e-08 3.575e-08
15-150 8.372e-08 4.472e-08
Plot creation:
Tue May 22 00:41:48 EDT 2012