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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.2766 -5.6171 0.0292 33.1880 -15.5256 1.7506558 6.574 TRIG_00528411
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [sec])
Background time interval of the image:
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
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
The mask-weighted light curves based on cleaned DPHs
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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.59727 ( -0.362847 0.422073 )
Norm@50keV : 2.42577E-04 ( -7.56485e-05 7.78847e-05 )
------------------------------------------------------------
# Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 57 degrees of freedom
# Null hypothesis probability = 5.698166e-01
Photon flux (15-150 keV) in 320 sec: 5.06405E-02 ( -0.0086732 0.00868777 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.98314e-07 ( -1.74118e-07 1.88038e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.775590 ( -4.82513 1.75252 )
Epeak [keV] : 24.9742 ( -23.2771 7.11282 )
Norm@50keV : 5.01673E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.64 using 59 PHA bins.
# Reduced chi-squared = 0.9043 for 56 degrees of freedom
# Null hypothesis probability = 6.772406e-01
Photon flux (15-150 keV) in 320 sec: 4.80912E-02 ( -0.0084593 0.0086358 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58061e-07 ( -1.34355e-07 1.98128e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.167260 ( -1.36656 2.86244 )
beta : -9.99994 ( 54206.9 54216.9 )
Epeak [keV] : 23.3307 ( -21.1237 6.80022 )
Norm@50keV : 1.10453E-02 ( -0.0134567 19.3883 )
------------------------------------------------------------
# Chi-Squared = 50.68 using 59 PHA bins.
# Reduced chi-squared = 0.9214 for 55 degrees of freedom
# Null hypothesis probability = 6.403385e-01
Photon flux (15-150 keV) in 320 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] : 6.62288 (-1.03 1.20618)
R^2/D10^2 : 0.124125 (-0.0629541 0.131274)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 57 degrees of freedom
# Null hypothesis probability = 7.014746e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.633e-07 9.109e-08
25- 50 3.231e-07 1.082e-07
50-150 4.363e-08 2.710e-08
15-150 6.300e-07 1.774e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1589 (-8.26765 13.7968)
Norm : 0.464502 (-0.147579 0.23881)
------------------------------------------------------------
# Chi-Squared = 51.52 using 59 PHA bins.
# Reduced chi-squared = 0.9039 for 57 degrees of freedom
# Null hypothesis probability = 6.800090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.801e-07 6.686e-08
25- 50 2.954e-07 1.022e-07
50-150 1.341e-07 9.173e-08
15-150 7.097e-07 1.906e-07
Double BB
R1^2/D10^2 : 95.9567 ( )
kT2 [keV] : 7.02261 (-1.2214 -6.99195)
R2^2/D10^2 : 9.24576E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.03 using 59 PHA bins.
# Chi-Squared = 49.97 using 59 PHA bins.
# Chi-Squared = 49.95 using 59 PHA bins.
# Reduced chi-squared = 0.9096 for 55 degrees of freedom
# Reduced chi-squared = 0.9085 for 55 degrees of freedom
# Reduced chi-squared = 0.9083 for 55 degrees of freedom
# Null hypothesis probability = 6.645004e-01
# Null hypothesis probability = 6.668763e-01
# Null hypothesis probability = 6.673141e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.659e-07 1.425e-07
25- 50 3.237e-07 1.816e-07
50-150 5.700e-08 3.963e-08
15-150 6.466e-07 3.491e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.59727 ( -0.362847 0.422073 )
Norm@50keV : 2.42577E-04 ( -7.56485e-05 7.78847e-05 )
------------------------------------------------------------
# Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 57 degrees of freedom
# Null hypothesis probability = 5.698166e-01
Photon flux (15-150 keV) in 320 sec: 5.06405E-02 ( -0.0086732 0.00868777 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.98314e-07 ( -1.74118e-07 1.88038e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.775590 ( -4.82513 1.75252 )
Epeak [keV] : 24.9742 ( -23.2771 7.11282 )
Norm@50keV : 5.01673E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.64 using 59 PHA bins.
# Reduced chi-squared = 0.9043 for 56 degrees of freedom
# Null hypothesis probability = 6.772406e-01
Photon flux (15-150 keV) in 320 sec: 4.80912E-02 ( -0.0084593 0.0086358 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58061e-07 ( -1.34355e-07 1.98128e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.167260 ( -1.36656 2.86244 )
beta : -9.99994 ( 54206.9 54216.9 )
Epeak [keV] : 23.3307 ( -21.0443 6.80022 )
Norm@50keV : 1.10453E-02 ( -0.0134567 19.379 )
------------------------------------------------------------
# Chi-Squared = 50.68 using 59 PHA bins.
# Reduced chi-squared = 0.9214 for 55 degrees of freedom
# Null hypothesis probability = 6.403385e-01
Photon flux (15-150 keV) in 320 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] : 6.62288 (-1.03 1.20618)
R^2/D10^2 : 0.124125 (-0.0629541 0.131274)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 57 degrees of freedom
# Null hypothesis probability = 7.014746e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.633e-07 9.086e-08
25- 50 3.231e-07 1.033e-07
50-150 4.363e-08 2.596e-08
15-150 6.300e-07 1.942e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1589 (-8.26765 13.7968)
Norm : 0.464502 (-0.147579 0.23881)
------------------------------------------------------------
# Chi-Squared = 51.52 using 59 PHA bins.
# Reduced chi-squared = 0.9039 for 57 degrees of freedom
# Null hypothesis probability = 6.800090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.801e-07 6.915e-08
25- 50 2.954e-07 9.003e-08
50-150 1.341e-07 8.655e-08
15-150 7.097e-07 2.139e-07
Double BB
R1^2/D10^2 : 95.9567 ( )
kT2 [keV] : 7.02261 (-1.2214 -6.99195)
R2^2/D10^2 : 9.24576E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.03 using 59 PHA bins.
# Chi-Squared = 49.97 using 59 PHA bins.
# Chi-Squared = 49.95 using 59 PHA bins.
# Reduced chi-squared = 0.9096 for 55 degrees of freedom
# Reduced chi-squared = 0.9085 for 55 degrees of freedom
# Reduced chi-squared = 0.9083 for 55 degrees of freedom
# Null hypothesis probability = 6.645004e-01
# Null hypothesis probability = 6.668763e-01
# Null hypothesis probability = 6.673141e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.659e-07 1.383e-07
25- 50 3.237e-07 1.949e-07
50-150 5.700e-08 4.038e-08
15-150 6.466e-07 3.499e-07
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.59727 ( -0.362847 0.422073 )
Norm@50keV : 2.42577E-04 ( -7.56485e-05 7.78847e-05 )
------------------------------------------------------------
# Chi-Squared = 54.49 using 59 PHA bins.
# Reduced chi-squared = 0.9560 for 57 degrees of freedom
# Null hypothesis probability = 5.698166e-01
Photon flux (15-150 keV) in 320 sec: 5.06405E-02 ( -0.0086732 0.00868777 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.98314e-07 ( -1.74118e-07 1.88038e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.775590 ( -4.82513 1.75252 )
Epeak [keV] : 24.9742 ( -23.2771 7.11282 )
Norm@50keV : 5.01673E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.64 using 59 PHA bins.
# Reduced chi-squared = 0.9043 for 56 degrees of freedom
# Null hypothesis probability = 6.772406e-01
Photon flux (15-150 keV) in 320 sec: 4.80912E-02 ( -0.0084593 0.0086358 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58061e-07 ( -1.34355e-07 1.98128e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.167260 ( -1.36656 2.86244 )
beta : -9.99994 ( 54206.9 54216.9 )
Epeak [keV] : 23.3307 ( -21.1783 6.80022 )
Norm@50keV : 1.10453E-02 ( -0.0134567 19.385 )
------------------------------------------------------------
# Chi-Squared = 50.68 using 59 PHA bins.
# Reduced chi-squared = 0.9214 for 55 degrees of freedom
# Null hypothesis probability = 6.403385e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 2.6694e-07
S(50-100 keV) = 1.76442e-07
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 0.66098
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.07736
Count Ratio (50-100 keV) / (15-25 keV) = 0.158455
Mask shadow pattern
IMX = 6.302154398323225E-01, IMY = 1.750773053279981E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 320.000000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 320.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
262.8514 -24.7527 7.2 38.5 -58.8 0.8400 1.6 8.6 GX 1+4
264.6899 -44.5798 13.3 36.4 -91.6 -0.5943 -0.9 8.1 4U 1735-44
268.2909 -1.4513 10.0 44.8 -23.7 0.4628 1.2 4.6 SW J1753.5-0127
270.1679 -25.0682 4.9 32.0 -56.5 0.7728 2.4 6.4 GX 5-1
270.4858 -25.7982 38.4 31.5 -57.7 0.0952 0.3 10.4 GRS 1758-258
274.1295 -13.9729 5.9 32.7 -34.5 0.5782 2.0 8.1 GX 17+2
275.9023 -30.4503 8.4 26.1 -65.9 0.4167 1.4 5.1 H1820-303
285.1672 -24.8295 12.9 18.8 -48.0 0.2051 0.9 9.0 HT1900.1-2455
288.7803 10.9528 1.1 42.6 11.0 4.1382 10.8 1.1 GRS 1915+105
263.0429 -33.6973 10.0 36.9 -73.2 0.7155 1.2 8.7 GX 354-0
280.2767 -5.6170 1.7 33.2 -15.5 1.7525 6.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
414.900600 455.700620
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9873 -15.6476 33.2 35.9 -142.8 0.0336 0.3 0.6 Sco X-1
255.9373 -37.7162 3.1 38.9 177.3 0.3439 3.7 8.0 4U 1700-377
256.6722 -36.3931 0.0 37.5 178.0 0.0586 0.7 11.6 GX 349+2
262.9931 -24.5418 0.0 25.1 -174.6 0.1191 1.7 12.3 GX 1+4
264.6997 -44.3170 11.8 41.0 163.1 0.1143 1.0 8.2 4U 1735-44
268.5017 -1.3667 6.7 12.3 -104.1 0.1179 1.7 9.5 SW J1753.5-0127
270.2462 -25.1116 6.2 21.7 171.1 0.1230 1.9 2.8 GX 5-1
270.3637 -25.9008 5.7 22.3 169.9 0.1374 2.0 10.0 GRS 1758-258
274.0017 -14.1608 4.6 10.5 -179.2 0.1602 2.5 7.5 GX 17+2
276.0725 -30.3017 48.1 25.0 154.5 -0.0179 -0.2 8.6 H1820-303
285.0542 -24.9452 241.4 19.9 133.0 -0.0035 -0.0 1.8 HT1900.1-2455
288.7431 10.9649 1.4 18.7 -6.1 0.5608 8.3 3.5 GRS 1915+105
299.6310 35.0787 16.6 44.6 -10.7 0.0825 0.7 7.6 Cyg X-1
308.2689 40.9380 9.4 53.2 -7.2 0.2338 1.2 7.2 Cyg X-3
262.9281 -33.7731 6.3 32.4 173.6 0.1549 1.8 4.8 GX 354-0
325.0503 27.5085 2.2 54.6 16.6 1.8969 5.2 ------ UNKNOWN
239.3944 -41.9215 2.6 51.2 -175.2 0.7085 4.4 ------ UNKNOWN
Plot creation:
Tue Jul 24 22:11:05 EDT 2012