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Image
Pre-slew 15.0-50.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
251.7189 -45.8334 0.0281 10.3313 -167.6020 0.0166700 6.825 TRIG_00503525
Foreground time interval of the image:
0.000 0.044 (delta_t = 0.044 [sec])
Background time interval of the image:
-10.004 -2.004 (delta_t = 8.000 [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
Blue+Cyan dotted lines: Time interval of the scaled map
From -0.004000 to 0.060000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From -0.004000 to 0.060000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From -0.004000 to 0.060000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
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 0.044 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.10385 ( -0.569206 0.708552 )
Norm@50keV : 8.15726E-04 ( -0.000460017 0.000536343 )
------------------------------------------------------------
# Chi-Squared = 86.71 using 59 PHA bins.
# Reduced chi-squared = 1.521 for 57 degrees of freedom
# Null hypothesis probability = 6.792281e-03
Photon flux (15-150 keV) in 0.044 sec: 1.38970 ( -0.482154 0.482029 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.94212e-09 ( -6.651e-10 6.651e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.84439E-03 ( )
------------------------------------------------------------
# Chi-Squared = 107.28 using 59 PHA bins.
# Reduced chi-squared = 1.9157 for 56 degrees of freedom
# Null hypothesis probability = 4.501839e-05
Photon flux (15-150 keV) in 0.044 sec: 3.19047 ( -0.69751 0.69762 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.93601e-09 ( -1.08158e-09 1.07963e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.044 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.98125 ( 230.875 240.711 )
beta : -5.09153 ( -0.774821 0.502485 )
Epeak [keV] : 79.4819 ( -79.4819 -79.4819 )
Norm@50keV : 0.112059 ( -0.0633738 0.0720586 )
------------------------------------------------------------
# Chi-Squared = 86.71 using 59 PHA bins.
# Reduced chi-squared = 1.577 for 55 degrees of freedom
# Null hypothesis probability = 4.094432e-03
Photon flux (15-150 keV) in 0.044 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] : 3.82554 (-0.367766 0.326751)
R^2/D10^2 : 85.9796 (-38.5192 68.4795)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 57 degrees of freedom
# Null hypothesis probability = 1.665139e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.761e-09 8.787e-10
25- 50 8.760e-10 3.329e-10
50-150 8.084e-12 6.562e-12
15-150 3.645e-09 1.209e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.19870 (-1.18366 1.21909)
Norm : 150.302 (-67.4699 108.528)
------------------------------------------------------------
# Chi-Squared = 76.42 using 59 PHA bins.
# Reduced chi-squared = 1.341 for 57 degrees of freedom
# Null hypothesis probability = 4.393459e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.239e-09 8.956e-10
25- 50 5.835e-10 2.484e-10
50-150 1.431e-11 1.182e-11
15-150 2.837e-09 1.001e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.80882 (-3.83392 196.15)
R1^2/D10^2 : 32.1379 (-32.1797 -32.1797)
kT2 [keV] : 3.83319 (-3.82237 196.154)
R2^2/D10^2 : 54.0093 (-54.0547 -54.0547)
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246066e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.761e-09 3.969e-01
25- 50 8.752e-10 4.143e+00
50-150 8.063e-12 8.897e+01
15-150 3.644e-09 9.555e+01
Peak spectrum fit
Power-law model
Time interval is from -5.560 sec. to -4.560 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.06801 ( -1.11993 1.7371 )
Norm@50keV : 9.59707E-04 ( -0.000959707 0.00117867 )
------------------------------------------------------------
# Chi-Squared = 65.10 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 57 degrees of freedom
# Null hypothesis probability = 2.156610e-01
Photon flux (15-150 keV) in 1 sec: 0.277424 ( -0.127132 0.128373 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19066e-08 ( -6.46889e-09 8.38055e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.560 sec. to -4.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.07320E-03 ( )
------------------------------------------------------------
# Chi-Squared = 69.19 using 59 PHA bins.
# Reduced chi-squared = 1.236 for 56 degrees of freedom
# Null hypothesis probability = 1.108914e-01
Photon flux (15-150 keV) in 1 sec: 0.277684 ( -0.127463 0.127659 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.61819e-09 ( -5.13658e-09 1.0532e-08 ) ergs/cm2
Band function
Time interval is from -5.560 sec. to -4.560 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.48708 ( 1.47728 1.47728 )
beta : -3.54222 ( 3.22242 1.23886 )
Epeak [keV] : 16.6444 ( -8.1098 450.755 )
Norm@50keV : 332.323 ( -509.313 3.36156e+06 )
------------------------------------------------------------
# Chi-Squared = 64.50 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 55 degrees of freedom
# Null hypothesis probability = 1.784971e-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] : 4.58017 (-1.85441 2.90126)
R^2/D10^2 : 3.55546 (-3.55565 52.3058)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 65.12 using 59 PHA bins.
# Reduced chi-squared = 1.143 for 57 degrees of freedom
# Null hypothesis probability = 2.149975e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.007e-09 3.943e-09
25- 50 3.140e-09 2.116e-09
50-150 8.196e-11 8.535e-11
15-150 9.228e-09 5.920e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.1670 (-8.55337 40.3849)
Norm : 5.30827 (-5.30823 27.4298)
------------------------------------------------------------
# Chi-Squared = 65.07 using 59 PHA bins.
# Reduced chi-squared = 1.142 for 57 degrees of freedom
# Null hypothesis probability = 2.163342e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.756e-09 3.744e-09
25- 50 3.706e-09 2.550e-09
50-150 5.803e-10 6.175e-10
15-150 1.004e-08 7.115e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.29994 (-4.29994 2.79743)
R1^2/D10^2 : 4.65378 (-4.65387 -4.65387)
kT2 [keV] : 46.7712 (-46.7707 -46.7707)
R2^2/D10^2 : 2.87280E-04 (-0.000287291 -0.000287291)
------------------------------------------------------------
# Chi-Squared = 64.31 using 59 PHA bins.
# Reduced chi-squared = 1.169 for 55 degrees of freedom
# Null hypothesis probability = 1.828920e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.016e-09 3.563e-09
25- 50 3.139e-09 2.006e-09
50-150 5.917e-09 3.103e-09
15-150 1.507e-08 8.465e-09
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: 3.15823 ( -0.85232 1.19235 )
Norm@50keV : 2.30263E-04 ( -0.000230264 0.000228822 )
------------------------------------------------------------
# Chi-Squared = 39.78 using 59 PHA bins.
# Reduced chi-squared = 0.6979 for 57 degrees of freedom
# Null hypothesis probability = 9.597078e-01
Photon flux (15-150 keV) in 21.47 sec: 7.12132E-02 ( -0.0266821 0.0270741 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.41519e-08 ( -2.84881e-08 3.48149e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -5.67078 ( )
Epeak [keV] : 21.4784 ( -20.8506 5.37005 )
Norm@50keV : 1244.99 ( )
------------------------------------------------------------
# Chi-Squared = 36.32 using 59 PHA bins.
# Reduced chi-squared = 0.6486 for 56 degrees of freedom
# Null hypothesis probability = 9.808407e-01
Photon flux (15-150 keV) in 21.47 sec: 7.07223E-02 ( -0.0242258 0.0252615 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.42534e-08 ( -1.89756e-08 2.12497e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98944 ( -192.833 -182.833 )
beta : -9.37112 ( 9.99936 19.638 )
Epeak [keV] : 21.4028 ( -4.4517 4.67771 )
Norm@50keV : 359.205 ( -358.426 3465.83 )
------------------------------------------------------------
# Chi-Squared = 36.40 using 59 PHA bins.
# Reduced chi-squared = 0.6618 for 55 degrees of freedom
# Null hypothesis probability = 9.749744e-01
Photon flux (15-150 keV) in 21.47 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) = 3.52543e-10
S(50-100 keV) = 4.11447e-11
T90 vs. Hardness ratio plot
T90 = 29.1360000371933 sec.
Hardness ratio (energy fluence ratio) = 0.116708
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.51482
Count Ratio (50-100 keV) / (15-25 keV) = 0.057578
Mask shadow pattern
IMX = -1.780446603934030E-01, IMY = 3.913918760327067E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From -0.004000 to 0.060000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From -0.004000 to 0.060000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From -0.004000 to 0.060000
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 0.044000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.5096 -60.4707 6.9 57.4 -153.8 -0.0208 -1.7 10.8 Cen X-3
186.4994 -62.8151 30.9 49.5 -155.0 0.0022 0.4 5.1 GX 301-2
245.0582 -15.5086 3.9 23.5 -40.1 -0.0074 -2.9 9.1 Sco X-1
255.8982 -37.6791 5.6 1.7 -151.0 -0.0047 -2.1 10.8 4U 1700-377
256.2844 -36.2493 0.0 0.8 -91.1 0.0001 0.0 12.7 GX 349+2
262.9604 -24.6824 8.0 12.7 14.9 0.0036 1.4 4.6 GX 1+4
264.9385 -44.5629 4.5 10.1 137.4 0.0060 2.5 10.8 4U 1735-44
268.3954 -1.3063 3.7 36.6 9.5 0.0106 3.1 8.9 SW J1753.5-0127
270.1193 -25.1668 4.4 15.7 38.7 -0.0072 -2.9 10.4 GX 5-1
270.1430 -25.6352 6.7 15.4 39.9 0.0055 2.2 10.8 GRS 1758-258
274.0885 -14.1559 7.8 26.8 29.0 -0.0045 -1.5 8.6 GX 17+2
275.7765 -30.5116 8.1 16.5 65.1 0.0040 1.4 11.6 H1820-303
285.0516 -25.0370 5.7 26.3 62.9 0.0074 2.0 7.0 HT1900.1-2455
262.9943 -33.8619 802.6 5.3 54.2 0.0000 0.0 1.7 GX 354-0
265.3295 3.2790 1.9 40.4 3.1 0.0234 6.0 ------ UNKNOWN
251.7218 -45.8353 1.7 10.3 -167.6 0.0167 6.8 ------ UNKNOWN
235.3619 -27.4278 2.7 20.5 -79.9 0.0121 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
39.584600 95.891500
97.084000 296.814000
301.084000 302.130000
360.084000 422.123600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4988 -60.4696 5.4 47.4 -150.3 -1.4881 -2.1 10.7 Cen X-3
186.4596 -62.9644 0.0 39.5 -151.3 -0.7581 -1.5 12.8 GX 301-2
244.9889 -15.6406 0.2 30.7 -24.5 17.6859 53.4 0.5 Sco X-1
256.0123 -37.8377 1.5 8.6 11.4 2.0977 7.9 1.3 4U 1700-377
256.4923 -36.4386 2.8 10.0 10.7 1.1083 4.1 2.9 GX 349+2
263.1574 -24.8144 5.3 22.9 15.7 0.6349 2.2 9.1 GX 1+4
264.7711 -44.5215 5.8 9.3 74.8 0.5358 2.0 4.5 4U 1735-44
268.2625 -1.3884 6.9 46.7 11.2 -1.0906 -1.7 7.4 SW J1753.5-0127
270.3403 -25.0999 1.8 25.5 30.3 2.1337 6.5 3.3 GX 5-1
270.1497 -25.8157 11.4 24.8 30.9 0.3193 1.0 9.3 GRS 1758-258
274.1391 -14.0628 4.1 36.9 26.2 1.2554 2.8 7.9 GX 17+2
275.9269 -30.3049 3.6 24.4 47.2 1.2098 3.2 3.7 H1820-303
285.2286 -25.0462 0.0 33.9 52.0 0.9583 1.8 12.9 HT1900.1-2455
263.0045 -33.7852 3.6 14.8 27.7 0.9740 3.2 3.1 GX 354-0
267.8737 -22.7059 2.5 26.6 23.2 1.4564 4.6 ------ UNKNOWN
261.8549 -21.0506 2.9 26.1 10.1 1.1965 4.0 ------ UNKNOWN
228.4877 -76.2436 3.0 31.9 178.5 1.2387 3.9 ------ UNKNOWN
195.3426 -61.6033 2.2 35.5 -148.7 2.3432 5.3 ------ UNKNOWN
168.8145 -50.8862 3.6 52.4 -139.5 5.1712 3.2 ------ UNKNOWN
226.9113 -0.0828 3.4 50.7 -44.6 5.8783 3.4 ------ UNKNOWN
217.5488 -13.0106 4.4 43.7 -64.2 4.0764 2.7 ------ UNKNOWN
UNKNOWN
Plot creation:
Mon Oct 3 17:32:47 EDT 2011