Click here for the BAT GCN circular template
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.4221 -17.1419 0.0460 16.1 58.3 1.9224 4.2 TRIG_00536502
------------------------------------------
Foreground time interval of the image:
-71.000 -56.963 (delta_t = 14.037 [sec])
-56.000 52.360 (delta_t = 108.360 [sec])
53.000 105.000 (delta_t = 52.000 [sec])
Background time interval of the image:
-119.000 -71.000 (delta_t = 48.000 [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 0.000000 to 64.000000
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 64.000000
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 64.000000
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
Multiple GTIs in the spectrum
tstart tstop
-71.000000 -56.963300
-56.000000 52.360000
53.000000 105.000000
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 8.72673E-02 ( -0.0143294 0.0143302 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-71.000000 -56.963300
-56.000000 52.360000
53.000000 105.000000
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 7.64082E-02 ( -0.0137925 0.0140751 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-71.000000 -56.963300
-56.000000 52.360000
53.000000 105.000000
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 10.2357 (-1.213 1.40599)
R^2/D10^2 : 4.27601E-02 (-0.016865 0.0264276)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 67.68 using 59 PHA bins.
# Reduced chi-squared = 1.187 for 57 degrees of freedom
# Null hypothesis probability = 1.573467e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.603e-07 4.301e-08
25- 50 4.118e-07 8.589e-08
50-150 2.298e-07 9.247e-08
15-150 8.019e-07 1.745e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.1477 (-23.2858 48.8564)
Norm : 0.449385 (-0.0970655 0.119072)
------------------------------------------------------------
# Chi-Squared = 82.96 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.398584e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.001e-07 4.510e-08
25- 50 3.148e-07 7.028e-08
50-150 3.918e-07 2.194e-07
15-150 9.067e-07 2.602e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.141191 (-0.141191 -0.141191)
R1^2/D10^2 : 3.30031E-02 (-0.0330031 -0.0330031)
kT2 [keV] : 10.2353 (-1.21306 1.40594)
R2^2/D10^2 : 4.27657E-02 (-0.016864 0.0264286)
------------------------------------------------------------
# Chi-Squared = 67.68 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 55 degrees of freedom
# Null hypothesis probability = 1.171504e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from -63.500 sec. to -62.500 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 6.78496E-02 ( -0.0678496 0.18887 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -63.500 sec. to -62.500 sec.
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 4.95876E-02 ( -0.0495876 0.184703 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.58742e-13 ( 0 0 ) ergs/cm2
Band function
Time interval is from -63.500 sec. to -62.500 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 0.673389 (-0.814148 2.27862)
R^2/D10^2 : 3.73958E+08 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 53.76 using 59 PHA bins.
# Reduced chi-squared = 0.9431 for 57 degrees of freedom
# Null hypothesis probability = 5.974763e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.799e-10 6.220e-11
25- 50 1.509e-14 3.911e-17
50-150 0.000e+00 0.000e+00
15-150 6.799e-10 6.210e-11
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 0.775687 ( )
Norm : 1.19628E+08 ( )
------------------------------------------------------------
# Chi-Squared = 53.71 using 59 PHA bins.
# Reduced chi-squared = 0.9424 for 57 degrees of freedom
# Null hypothesis probability = 5.991249e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.477e-10 7.660e-11
25- 50 2.389e-14 2.317e-15
50-150 1.117e-25 0.000e+00
15-150 6.477e-10 4.945e-11
Double BB
R1^2/D10^2 : 4.33543E+15 ( )
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 5.30387E-05 (-5.30388e-05 7.01407e-05)
------------------------------------------------------------
# Chi-Squared = 55.52 using 59 PHA bins.
# Chi-Squared = 52.05 using 59 PHA bins.
# Chi-Squared = 51.84 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Reduced chi-squared = 0.9463 for 55 degrees of freedom
# Reduced chi-squared = 0.9426 for 55 degrees of freedom
# Null hypothesis probability = 4.551880e-01
# Null hypothesis probability = 5.881618e-01
# Null hypothesis probability = 5.960338e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.905e-11 7.765e+09
25- 50 5.866e-10 6.895e+10
50-150 1.428e-08 1.598e+12
15-150 1.493e-08 1.482e+12
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
XSPEC12>exit
XSPEC: quit
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 8.72673E-02 ( -0.0143294 0.0143302 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
XSPEC: quit
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 7.64082E-02 ( -0.0137925 0.0140751 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 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) = 2.85289e-07
S(50-100 keV) = 3.14328e-07
T90 vs. Hardness ratio plot
T90 = 160 sec.
Hardness ratio (energy fluence ratio) = 1.10179
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 2.0827
Count Ratio (50-100 keV) / (15-25 keV) = 0.440535
Mask shadow pattern
IMX = 1.518666326358280E-01, IMY = -2.456632472377230E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-119.000000 -71.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9549 -15.6291 2.4 16.4 -63.4 0.1135 4.8 1.6 Sco X-1
255.8042 -37.8185 20.5 13.2 -173.2 0.0123 0.6 8.8 4U 1700-377
256.4773 -36.3407 12.0 11.6 -174.0 0.0209 1.0 5.3 GX 349+2
262.9252 -24.8904 6.5 3.3 83.5 0.0389 1.8 9.8 GX 1+4
264.5359 -44.5450 6.4 20.0 163.6 0.0407 1.8 10.5 4U 1735-44
268.3814 -1.6032 3.7 25.0 16.4 -0.0788 -3.1 9.1 SW J1753.5-0127
270.1211 -24.9290 0.0 9.8 86.4 -0.0073 -0.3 12.6 GX 5-1
270.1367 -25.7016 6.1 9.8 91.0 -0.0409 -1.9 9.3 GRS 1758-258
274.0491 -14.1838 11.5 17.6 49.3 -0.0240 -1.0 9.2 GX 17+2
276.0449 -30.5068 6.6 15.8 108.7 -0.0426 -1.7 10.4 H1820-303
284.9806 -24.8862 9.8 23.2 89.7 -0.0344 -1.2 3.7 HT1900.1-2455
288.6463 11.1125 0.0 46.1 36.4 -0.2538 -3.6 13.4 GRS 1915+105
262.9285 -33.9816 4.6 9.5 156.1 -0.0548 -2.5 9.3 GX 354-0
253.0082 25.0467 2.3 50.4 -12.9 0.2429 5.1 ------ UNKNOWN
237.3314 22.6749 2.2 52.2 -31.4 0.3635 5.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-71.000000 -56.963300
-56.000000 52.360000
53.000000 105.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9729 -15.6456 0.6 16.4 -63.4 8.9030 18.7 0.5 Sco X-1
256.0356 -37.7794 2.5 13.1 -173.9 1.7811 4.6 4.5 4U 1700-377
256.5976 -36.5703 7.7 11.8 -174.7 0.6054 1.5 11.8 GX 349+2
262.8514 -24.6417 18.5 3.2 79.0 0.2656 0.6 10.6 GX 1+4
264.5568 -44.2972 0.0 19.8 163.4 -0.3253 -0.8 12.2 4U 1735-44
268.3101 -1.5840 137.3 25.0 16.2 -0.0377 -0.1 8.6 SW J1753.5-0127
270.4485 -25.1698 7.0 10.1 87.9 0.7226 1.6 10.5 GX 5-1
270.4672 -25.8690 4.6 10.1 91.9 1.1410 2.5 11.7 GRS 1758-258
273.8558 -14.1434 6.3 17.4 48.8 -0.8632 -1.8 10.8 GX 17+2
275.7473 -30.2295 0.0 15.4 108.0 0.1001 0.2 12.4 H1820-303
285.0616 -25.0566 15.1 23.3 90.2 0.4168 0.8 8.3 HT1900.1-2455
288.7479 10.9453 4.7 46.0 36.6 -3.1973 -2.5 3.0 GRS 1915+105
262.8104 -33.8309 4.3 9.3 156.4 1.0760 2.7 8.9 GX 354-0
283.6550 8.5025 2.2 41.0 32.9 4.2470 5.2 ------ UNKNOWN
270.9696 20.1860 2.5 46.6 9.6 3.8204 4.6 ------ UNKNOWN
266.2555 -26.4397 2.1 6.4 99.0 2.3556 5.3 ------ UNKNOWN
245.2931 28.7442 3.7 55.4 -20.5 4.8820 3.1 ------ UNKNOWN
190.4402 -65.9982 4.7 58.7 -159.1 7.2687 2.5 ------ UNKNOWN
231.3334 -4.2255 3.7 34.0 -62.4 2.0138 3.2 ------ UNKNOWN
205.6110 -43.4646 2.9 47.2 -132.6 5.8897 3.9 ------ UNKNOWN
194.6836 -54.0201 3.2 55.3 -145.2 10.7389 3.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
503.300600 669.710000
671.000000 682.200000
686.000000 727.280000
728.000000 728.475400
730.000000 750.710000
756.000000 963.047900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9826 -15.6434 0.3 28.3 -86.4 23.5874 38.7 0.3 Sco X-1
254.5732 35.4750 8.3 55.9 -14.6 2.3138 1.4 9.8 Her X-1
255.9066 -37.8751 1.9 26.4 -140.6 2.7671 6.1 4.2 4U 1700-377
256.4085 -36.4928 4.8 25.1 -139.1 1.0703 2.4 4.4 GX 349+2
262.9374 -24.7104 4.3 13.2 -122.2 1.0760 2.7 4.4 GX 1+4
264.7520 -44.3681 10.0 28.5 -160.3 0.4989 1.1 4.9 4U 1735-44
268.3663 -1.4531 5.0 16.8 -16.7 0.8523 2.3 0.1 SW J1753.5-0127
270.3800 -25.0576 3.9 8.8 -150.0 1.1944 3.0 5.4 GX 5-1
270.3413 -25.8893 5.1 9.6 -152.1 0.9235 2.3 9.0 GRS 1758-258
273.8450 -13.9679 6.6 3.2 -6.4 0.7302 1.7 10.2 GX 17+2
275.8265 -30.3356 3.5 13.3 180.0 1.2768 3.3 5.4 H1820-303
285.1747 -24.7526 23.9 12.6 134.3 -0.1906 -0.5 12.6 HT1900.1-2455
288.8163 10.9262 2.7 31.4 32.8 2.3119 4.3 1.6 GRS 1915+105
263.1635 -33.8582 7.3 19.6 -145.9 0.6605 1.6 8.8 GX 354-0
268.7198 17.5633 4.5 35.1 -4.6 1.3719 2.6 ------ UNKNOWN
264.5447 33.5209 3.1 51.5 -5.6 3.4734 3.8 ------ UNKNOWN
266.3018 -26.3940 0.8 12.0 -137.2 6.0112 14.8 ------ UNKNOWN
266.5100 -32.1558 2.7 16.7 -150.9 1.7320 4.3 ------ UNKNOWN
241.6395 -67.3138 2.6 54.5 -160.1 6.2612 4.5 ------ UNKNOWN
239.7442 -64.9857 2.8 53.2 -157.5 5.0176 4.1 ------ UNKNOWN
Plot creation:
Tue Oct 23 16:26:52 EDT 2012