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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
267.0480 -24.7790 0.0368 7.9 14.1 0.1463 5.2 TRIG_00530808
------------------------------------------
Foreground time interval of the image:
-2.688 4.800 (delta_t = 7.488 [sec])
Background time interval of the image:
-141.307 -2.688 (delta_t = 138.619 [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 0.000000 to 2.048000
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 2.048000
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 2.048000
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 -2.688 sec. to 4.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.37838 ( -0.917783 1.1878 )
Norm@50keV : 2.38157E-04 ( -0.000171317 0.000323681 )
------------------------------------------------------------
# Chi-Squared = 69.78 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 57 degrees of freedom
# Null hypothesis probability = 1.192090e-01
Photon flux (15-150 keV) in 7.488 sec: 0.205795 ( -0.0457715 0.0459796 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24024e-08 ( -1.41349e-08 1.61943e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.688 sec. to 4.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73182 ( )
Epeak [keV] : 1.90318 ( )
Norm@50keV : 4.74975E-02 ( )
------------------------------------------------------------
# Chi-Squared = 70.99 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 56 degrees of freedom
# Null hypothesis probability = 8.554821e-02
Photon flux (15-150 keV) in 7.488 sec: 0.205827 ( -0.04593 0.045725 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25551e-08 ( -1.43239e-08 1.70419e-08 ) ergs/cm2
Band function
Time interval is from -2.688 sec. to 4.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.01989 ( 0.600077 7.47323 )
beta : -4.37918 ( -1.18665 0.917784 )
Epeak [keV] : 209.993 ( -209.993 -209.993 )
Norm@50keV : 3.23430E-02 ( -0.0232847 0.0439938 )
------------------------------------------------------------
# Chi-Squared = 69.78 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 55 degrees of freedom
# Null hypothesis probability = 8.661253e-02
Photon flux (15-150 keV) in 7.488 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] : 2.91442 (-0.597024 0.773491)
R^2/D10^2 : 33.5727 (-33.5739 123.684)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 71.47 using 59 PHA bins.
# Reduced chi-squared = 1.254 for 57 degrees of freedom
# Null hypothesis probability = 9.397542e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.918e-08 2.222e-08
25- 50 5.155e-09 3.278e-09
50-150 6.542e-12 7.619e-12
15-150 4.434e-08 2.545e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.29215 (-2.06468 4.02417)
Norm : 21.5233 (-21.5238 57.8936)
------------------------------------------------------------
# Chi-Squared = 71.07 using 59 PHA bins.
# Reduced chi-squared = 1.247 for 57 degrees of freedom
# Null hypothesis probability = 9.964094e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.832e-08 2.133e-08
25- 50 7.818e-09 5.316e-09
50-150 1.147e-10 1.224e-10
15-150 4.625e-08 2.644e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.53792 (-0.642022 0.746212)
R1^2/D10^2 : 74.0362 (-59.3934 534.228)
kT2 [keV] : 11.9549 (-5.97367 15.3942)
R2^2/D10^2 : 1.60945E-02 (-0.0154711 0.0847215)
------------------------------------------------------------
# Chi-Squared = 67.13 using 59 PHA bins.
# Reduced chi-squared = 1.221 for 55 degrees of freedom
# Null hypothesis probability = 1.264036e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.754e-08 2.052e-08
25- 50 1.406e-08 8.360e-09
50-150 9.782e-09 7.492e-09
15-150 6.138e-08 3.049e-08
Peak spectrum fit
Power-law model
Time interval is from 0.556 sec. to 1.556 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.79639 ( -1.05192 1.37113 )
Norm@50keV : 3.36762E-04 ( -0.000336628 0.000621925 )
------------------------------------------------------------
# Chi-Squared = 55.56 using 59 PHA bins.
# Reduced chi-squared = 0.9747 for 57 degrees of freedom
# Null hypothesis probability = 5.293495e-01
Photon flux (15-150 keV) in 1 sec: 0.428428 ( -0.120626 0.122549 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39559e-08 ( -4.50567e-09 5.15852e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.556 sec. to 1.556 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.92820E-03 ( )
------------------------------------------------------------
# Chi-Squared = 82.79 using 59 PHA bins.
# Reduced chi-squared = 1.478 for 56 degrees of freedom
# Null hypothesis probability = 1.149525e-02
Photon flux (15-150 keV) in 1 sec: 0.460349 ( -0.11286 0.113089 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38276e-08 ( -3.4687e-09 3.4813e-09 ) ergs/cm2
Band function
Time interval is from 0.556 sec. to 1.556 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.54175 ( 3.28998 5.94609 )
beta : -4.79658 ( -1.37088 1.05223 )
Epeak [keV] : 87.5189 ( -87.5189 -87.5189 )
Norm@50keV : 4.57616E-02 ( -0.0457516 0.0845295 )
------------------------------------------------------------
# Chi-Squared = 55.56 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.536108e-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] : 2.89589 (-0.572585 0.675767)
R^2/D10^2 : 79.7479 (-80.2659 267.241)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.68 using 59 PHA bins.
# Reduced chi-squared = 0.9242 for 57 degrees of freedom
# Null hypothesis probability = 6.376807e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.193e-08 6.865e-09
25- 50 1.535e-09 9.625e-10
50-150 1.846e-12 2.126e-12
15-150 1.347e-08 7.690e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.66829 (-1.75076 2.83371)
Norm : 64.9490 (-64.949 168.039)
------------------------------------------------------------
# Chi-Squared = 54.01 using 59 PHA bins.
# Reduced chi-squared = 0.9475 for 57 degrees of freedom
# Null hypothesis probability = 5.880134e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.135e-08 6.420e-09
25- 50 1.881e-09 1.223e-09
50-150 1.770e-11 2.177e-11
15-150 1.325e-08 7.595e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.84934 (-0.587497 0.676817)
R1^2/D10^2 : 86.8701 (-87.352 318.133)
kT2 [keV] : 27.4248 (-27.7587 -27.7587)
R2^2/D10^2 : 9.93828E-04 (-0.000976015 -0.000976015)
------------------------------------------------------------
# Chi-Squared = 51.95 using 59 PHA bins.
# Reduced chi-squared = 0.9446 for 55 degrees of freedom
# Null hypothesis probability = 5.918295e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.183e-08 6.645e-09
25- 50 2.152e-09 1.138e-09
50-150 4.007e-09 3.794e-09
15-150 1.799e-08 1.003e-08
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: 4.37838 ( -0.917783 1.1878 )
Norm@50keV : 2.38157E-04 ( -0.000171317 0.000323681 )
------------------------------------------------------------
# Chi-Squared = 69.78 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 57 degrees of freedom
# Null hypothesis probability = 1.192090e-01
Photon flux (15-150 keV) in 7.488 sec: 0.205795 ( -0.0457715 0.0459796 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24024e-08 ( -1.41349e-08 1.61943e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73182 ( )
Epeak [keV] : 1.90318 ( )
Norm@50keV : 4.74975E-02 ( )
------------------------------------------------------------
# Chi-Squared = 70.99 using 59 PHA bins.
# Reduced chi-squared = 1.268 for 56 degrees of freedom
# Null hypothesis probability = 8.554821e-02
Photon flux (15-150 keV) in 7.488 sec: 0.205827 ( -0.04593 0.045725 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25551e-08 ( -1.43239e-08 1.70419e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.01989 ( 0.600077 7.47323 )
beta : -4.37918 ( -1.18665 0.917784 )
Epeak [keV] : 209.993 ( -209.993 -209.993 )
Norm@50keV : 3.23430E-02 ( -0.0232847 0.0439938 )
------------------------------------------------------------
# Chi-Squared = 69.78 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 55 degrees of freedom
# Null hypothesis probability = 8.661253e-02
Photon flux (15-150 keV) in 7.488 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) = 1.26126e-08
S(50-100 keV) = 2.42569e-09
T90 vs. Hardness ratio plot
T90 = 7.04000002145767 sec.
Hardness ratio (energy fluence ratio) = 0.192323
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.198292
Count Ratio (50-100 keV) / (15-25 keV) = 0.05082
Mask shadow pattern
IMX = 1.338468436364867E-01, IMY = -3.368624593968897E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-141.307400 -2.688000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0025 -15.6244 0.4 25.9 -43.1 5.0840 31.8 1.6 Sco X-1
255.8297 -37.9604 6.1 10.3 -113.2 0.2527 1.9 10.2 4U 1700-377
256.4482 -36.4832 2.8 9.2 -106.5 0.5330 4.0 3.7 GX 349+2
262.9051 -24.6093 4.5 8.6 -11.8 0.3534 2.6 9.9 GX 1+4
264.9008 -44.2790 11.3 11.7 -163.0 0.1331 1.0 12.3 4U 1735-44
268.3721 -1.3011 7.1 31.4 14.5 0.2807 1.6 9.1 SW J1753.5-0127
270.4824 -25.1921 0.0 8.2 36.7 0.1259 1.0 12.7 GX 5-1
270.1556 -25.8330 3.1 7.5 36.6 0.4894 3.8 9.6 GRS 1758-258
273.8201 -13.9252 0.0 19.8 32.2 0.2431 1.7 12.7 GX 17+2
275.8494 -30.2990 4.1 8.2 87.1 0.3644 2.8 5.7 H1820-303
285.2363 -24.9783 6.5 18.0 80.7 0.2705 1.8 11.4 HT1900.1-2455
288.9136 10.9205 3.7 48.5 40.9 1.9701 3.2 7.0 GRS 1915+105
262.8206 -33.8812 75.6 3.4 -101.7 -0.0217 -0.2 8.8 GX 354-0
328.5368 -46.6374 2.2 48.4 136.9 3.2732 5.4 ------ UNKNOWN
217.5863 -32.7025 3.3 40.9 -92.8 2.3533 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.688000 4.800000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9411 -15.4998 9.5 26.0 -43.0 0.0385 1.2 8.7 Sco X-1
255.9369 -37.7392 4.8 10.1 -112.4 0.0645 2.4 6.7 4U 1700-377
256.6389 -36.5572 0.0 9.1 -107.3 -0.0163 -0.6 12.7 GX 349+2
262.8347 -24.6957 17.2 8.6 -12.4 0.0185 0.7 10.0 GX 1+4
264.7776 -44.2940 11.9 11.8 -162.6 0.0277 1.0 9.5 4U 1735-44
268.2201 -1.3785 5.9 31.3 14.2 -0.0696 -2.0 9.9 SW J1753.5-0127
270.3367 -25.2217 8.8 8.1 35.9 0.0364 1.3 9.0 GX 5-1
270.4698 -25.8624 18.7 7.6 38.6 -0.0165 -0.6 11.5 GRS 1758-258
273.9018 -14.2097 0.0 19.6 32.7 -0.0412 -1.4 12.0 GX 17+2
275.9704 -30.2525 3.5 8.3 87.0 -0.0910 -3.3 7.3 H1820-303
284.9291 -24.8032 11.5 17.9 79.8 0.0337 1.0 9.1 HT1900.1-2455
288.9362 10.9529 7.0 48.5 41.0 -0.2030 -1.6 8.1 GRS 1915+105
263.1386 -33.6631 0.0 3.1 -99.6 0.0272 1.0 12.7 GX 354-0
271.8283 18.5903 2.2 51.5 17.4 0.5570 5.3 ------ UNKNOWN
263.8626 11.8163 2.3 44.5 7.3 0.2487 5.0 ------ UNKNOWN
280.2807 -56.1373 2.6 25.4 173.1 0.1351 4.4 ------ UNKNOWN
267.0480 -24.7791 2.2 7.9 14.1 0.1463 5.2 ------ UNKNOWN
261.7835 -10.3612 2.1 22.7 -1.3 0.1552 5.4 ------ UNKNOWN
217.8582 -31.4587 2.7 41.0 -90.9 0.5196 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
56.892600 315.692610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9934 -15.6352 0.3 22.6 -70.3 9.2006 34.4 0.9 Sco X-1
256.0726 -37.8973 1.7 16.1 -147.0 1.3722 6.9 5.2 4U 1700-377
256.4186 -36.4087 3.3 14.8 -144.2 0.7082 3.5 1.2 GX 349+2
262.9365 -24.7184 3.9 3.8 -90.0 0.6205 3.0 4.3 GX 1+4
264.7585 -44.4069 3.6 19.7 -175.0 0.6986 3.2 2.7 4U 1735-44
268.2783 -1.4664 5.8 23.3 3.1 0.4200 2.0 5.4 SW J1753.5-0127
270.2822 -25.0289 6.9 2.9 96.0 0.3445 1.7 3.0 GX 5-1
270.1321 -25.5971 0.0 2.9 107.5 -0.1951 -1.0 12.7 GRS 1758-258
274.0670 -13.9117 2.7 12.7 32.6 0.8405 4.3 8.3 GX 17+2
276.1040 -30.4399 11.9 9.8 127.5 0.1900 1.0 10.2 H1820-303
285.1672 -25.0493 5.6 16.4 94.9 0.4769 2.1 10.5 HT1900.1-2455
288.7966 10.9461 1.2 41.5 33.3 4.2712 9.5 0.1 GRS 1915+105
262.8506 -33.7527 10.5 9.7 -158.6 -0.2239 -1.1 8.5 GX 354-0
291.9978 -1.8244 2.6 33.2 50.3 1.5549 4.4 ------ UNKNOWN
230.7332 -13.5830 2.4 36.0 -78.6 2.4982 4.8 ------ UNKNOWN
233.7182 15.8189 2.1 52.0 -42.1 5.8955 5.4 ------ UNKNOWN
Plot creation:
Tue Aug 14 01:22:52 EDT 2012