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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
277.9034 36.5163 0.0161 55.8155 -165.2759 5.5479682 11.931 TRIG_00307604
Foreground time interval of the image:
-33.336 71.901 (delta_t = 105.237 [sec])
Background time interval of the image:
-323.000 -33.336 (delta_t = 289.664 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -33.336 sec. to 170.028 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55975 ( -0.162121 0.162894 )
Norm@50keV : 2.61946E-03 ( -0.000223514 0.000223388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.62 using 59 PHA bins.
# Reduced chi-squared = 0.8705 for 57 degrees of freedom
# Null hypothesis probability = 7.456018e-01
Photon flux (15-150 keV) in 203.4 sec: 0.332550 ( -0.0316224 0.0318618 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.00907e-06 ( -4.46087e-07 4.48151e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -33.336 sec. to 170.028 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.24451 ( -0.169323 0.157919 )
Epeak [keV] : 93.3028 ( -9999.36 -9999.36 )
Norm@50keV : 1.09261E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.60 using 59 PHA bins.
# Reduced chi-squared = 0.8679 for 56 degrees of freedom
# Null hypothesis probability = 7.480798e-01
Photon flux (15-150 keV) in 203.4 sec: 0.334282 ( -0.03373 0.030208 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98897e-06 ( -4.30557e-07 4.59928e-07 ) ergs/cm2
Band function
Time interval is from -33.336 sec. to 170.028 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.30268 ( 1.30268 1.30268 )
beta : -1.55972 ( -0.163086 0.162236 )
Epeak [keV] : 21.4661 ( -21.4661 -21.4661 )
Norm@50keV : 5.44058E-03 ( -0.00232827 0.380993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.62 using 59 PHA bins.
# Reduced chi-squared = 0.9021 for 55 degrees of freedom
# Null hypothesis probability = 6.797334e-01
Photon flux (15-150 keV) in 203.4 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] : 17.6261 (-2.01564 2.32196)
R^2/D10^2 : 2.01531E-02 (-0.00711111 0.0108562)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.24 using 59 PHA bins.
# Reduced chi-squared = 1.706 for 57 degrees of freedom
# Null hypothesis probability = 7.139086e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.567e-07 4.507e-08
25- 50 1.168e-06 1.621e-07
50-150 2.620e-06 3.976e-07
15-150 4.045e-06 4.587e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.34598 (-0.115134 0.115122)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.63 using 59 PHA bins.
# Reduced chi-squared = 0.9234 for 57 degrees of freedom
# Null hypothesis probability = 6.395417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.819e-07 7.627e-08
25- 50 1.312e-06 1.851e-07
50-150 2.877e-06 1.048e-06
15-150 4.870e-06 1.079e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.63290 (-1.4548 1.87809)
R1^2/D10^2 : 0.883093 (-0.596729 2.46301)
kT2 [keV] : 27.1083 (-4.99177 8.87502)
R2^2/D10^2 : 3.91790E-03 (-0.00240574 0.00417429)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.62 using 59 PHA bins.
# Reduced chi-squared = 0.9203 for 55 degrees of freedom
# Null hypothesis probability = 6.426304e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.850e-07 3.856e-07
25- 50 1.170e-06 3.889e-07
50-150 3.121e-06 9.065e-07
15-150 5.076e-06 1.160e-06
Peak spectrum fit
Power-law model
Time interval is from 43.800 sec. to 44.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.52716 ( -5.05047 2.4346 )
Norm@50keV : 7.14361E-03 ( -0.00704237 0.00570705 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.31 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 57 degrees of freedom
# Null hypothesis probability = 2.358706e-01
Photon flux (15-150 keV) in 1 sec: 1.43009 ( -1.43103 0.647196 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.14721e-08 ( -7.13192e-08 4.66627e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 43.800 sec. to 44.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.01646 ( )
Epeak [keV] : 51.4504 ( )
Norm@50keV : 8.63858E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.52 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 56 degrees of freedom
# Null hypothesis probability = 2.033551e-01
Photon flux (15-150 keV) in 1 sec: 1.45231 ( -1.45231 0.63445 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.40927e-08 ( -7.40927e-08 4.00943e-08 ) ergs/cm2
Band function
Time interval is from 43.800 sec. to 44.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99497 ( 9.99497 9.99497 )
beta : -2.54020 ( -2.40057 8.14246 )
Epeak [keV] : 9.27247 ( -9.27247 -9.27247 )
Norm@50keV : 0.964133 ( -0.941718 0.791001 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.31 using 59 PHA bins.
# Reduced chi-squared = 1.169 for 55 degrees of freedom
# Null hypothesis probability = 1.827044e-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] : 4.41346 (-1.63934 2.32166)
R^2/D10^2 : 21.8391 (-21.8391 262.104)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.19 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 57 degrees of freedom
# Null hypothesis probability = 2.132817e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.136e-08 1.978e-08
25- 50 1.486e-08 1.070e-08
50-150 3.180e-10 3.665e-10
15-150 4.654e-08 3.069e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.4439 (-6.55164 -11.4439)
Norm : 36.9554 (-36.9555 252.916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.40 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.080758e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.100e-08 1.889e-08
25- 50 1.585e-08 1.096e-08
50-150 1.541e-09 1.696e-09
15-150 4.839e-08 3.126e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.15343 (-1.68609 1.71212)
R1^2/D10^2 : 28.6246 (-20.4401 55.3894)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 2.28019E-04 (-0.000118498 0.00106951)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.21 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.19 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.668218e-01
# Null hypothesis probability = 4.675639e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.089e-08 1.867e-08
25- 50 1.608e-08 9.260e-09
50-150 5.992e-08 2.431e-08
15-150 1.069e-07 3.218e-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: 1.46067 ( -0.187051 0.185549 )
Norm@50keV : 4.10927E-03 ( -0.000406591 0.00040518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.88 using 59 PHA bins.
# Reduced chi-squared = 0.6996 for 57 degrees of freedom
# Null hypothesis probability = 9.587118e-01
Photon flux (15-150 keV) in 105.2 sec: 0.507765 ( -0.057496 0.0581534 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.12872e-06 ( -4.1418e-07 4.1521e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45791 ( -0.338617 0.186449 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.12265E-03 ( -0.00412265 0.00202439 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.89 using 59 PHA bins.
# Reduced chi-squared = 0.7124 for 56 degrees of freedom
# Null hypothesis probability = 9.488730e-01
Photon flux (15-150 keV) in 105.2 sec: 0.511035 ( -0.061427 0.054495 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.12327e-06 ( -4.13026e-07 4.1635e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.23030 ( 1.2303 1.2303 )
beta : -1.46065 ( -0.185498 0.187011 )
Epeak [keV] : 23.1188 ( -23.1188 -23.1188 )
Norm@50keV : 8.15936E-03 ( -0.00445378 0.605417 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.88 using 59 PHA bins.
# Reduced chi-squared = 0.7250 for 55 degrees of freedom
# Null hypothesis probability = 9.376399e-01
Photon flux (15-150 keV) in 105.2 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) = 1.27e-06
S(50-100 keV) = 1.73e-06
T90 vs. Hardness ratio plot
T90 = 166.740000009537 sec.
Hardness ratio (energy fluence ratio) = 1.3622
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.24637
Count Ratio (50-100 keV) / (15-25 keV) = 1.13468
Mask shadow pattern
IMX = -1.423964840634192E+00, IMY = 3.742103009276630E-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:
-323.000000 -33.336000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9851 -15.6437 0.3 26.6 102.7 13.9691 41.6 0.4 Sco X-1
256.0047 -37.8386 12.7 23.7 43.8 0.2387 0.9 0.9 4U 1700-377
256.4226 -36.3957 3.4 22.4 45.6 0.8712 3.4 1.8 GX 349+2
263.0684 -24.5916 6.1 10.4 65.9 0.3975 1.9 9.8 GX 1+4
264.7788 -44.4615 606.1 26.2 22.3 0.0047 0.0 1.7 4U 1735-44
268.3510 -1.4067 3.2 18.2 175.8 0.7904 3.6 2.9 SW J1753.5-0127
270.2532 -25.1350 2.9 6.4 29.0 0.9307 4.0 3.7 GX 5-1
270.4783 -25.8180 7.8 7.0 25.5 0.3503 1.5 10.5 GRS 1758-258
274.1067 -14.1291 3.2 5.1 -154.0 0.8356 3.6 8.1 GX 17+2
275.8813 -30.3850 1.9 11.7 -4.5 1.4668 6.2 2.5 H1820-303
284.8421 -24.8241 4.6 12.7 -51.3 0.5810 2.5 12.0 HT1900.1-2455
288.7959 10.9322 7.3 34.0 -141.1 0.4574 1.6 0.8 GRS 1915+105
262.8337 -33.9914 0.0 17.3 37.9 0.3092 1.2 12.2 GX 354-0
250.5244 1.3033 2.4 29.8 140.4 1.4849 4.8 ------ UNKNOWN
267.2978 -26.6379 1.6 9.0 41.5 1.6296 7.1 ------ UNKNOWN
285.3758 -51.3951 2.8 33.9 -4.8 1.3330 4.2 ------ UNKNOWN
320.2097 -62.3339 2.4 54.2 -15.4 3.5990 4.8 ------ UNKNOWN
294.2971 1.8125 2.7 29.8 -122.5 1.2407 4.3 ------ UNKNOWN
326.8394 -39.4148 4.7 50.6 -44.6 3.5475 2.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-33.336000 71.900600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8824 -15.7194 131.8 26.6 102.4 0.0148 0.1 7.3 Sco X-1
255.9858 -37.8440 46.6 23.7 43.8 -0.0331 -0.2 0.0 4U 1700-377
256.4367 -36.4244 102.7 22.4 45.6 -0.0147 -0.1 0.1 GX 349+2
263.1547 -24.5838 0.0 10.4 65.8 -0.2383 -2.1 12.5 GX 1+4
264.7629 -44.3324 18.1 26.1 22.4 -0.0894 -0.6 7.1 4U 1735-44
268.4966 -1.3491 3.8 18.2 176.3 -0.3358 -3.1 9.9 SW J1753.5-0127
270.4446 -25.0423 13.3 6.3 27.8 0.1033 0.9 9.0 GX 5-1
270.4502 -25.6291 11.4 6.9 26.1 0.1320 1.1 10.5 GRS 1758-258
273.9913 -13.9454 18.3 5.3 -155.7 0.0703 0.6 5.5 GX 17+2
276.0831 -30.2989 12.8 11.7 -5.4 0.1063 0.9 9.2 H1820-303
285.1796 -25.0366 738.3 13.1 -51.1 0.0017 0.0 10.5 HT1900.1-2455
288.8584 11.0120 5.7 34.1 -141.1 0.3037 2.0 5.3 GRS 1915+105
263.0010 -33.8181 287.5 17.0 37.8 0.0048 0.0 1.2 GX 354-0
280.2351 14.0264 1.9 33.9 -157.1 0.8281 6.1 ------ UNKNOWN
277.9034 36.5163 1.0 55.8 -165.3 5.5473 11.9 ------ UNKNOWN
283.7191 26.4876 2.5 46.8 -156.7 1.0349 4.6 ------ UNKNOWN
302.8515 -14.1157 2.5 29.4 -85.5 0.7552 4.5 ------ UNKNOWN
283.8394 38.8757 2.6 58.9 -160.2 3.2901 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
141.100600 511.800590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4624 35.3365 0.9 19.0 93.2 3.2457 12.7 0.4 Her X-1
268.3866 -1.4013 3.8 38.9 14.9 0.9820 3.1 3.3 SW J1753.5-0127
274.0458 -13.8874 5.2 50.5 4.5 1.2499 2.2 9.2 GX 17+2
288.8301 10.9451 1.6 27.4 -24.2 1.6878 7.2 1.9 GRS 1915+105
299.5895 35.1996 0.4 17.6 -92.5 6.5752 28.8 0.1 Cyg X-1
308.0748 40.9900 3.0 23.8 -110.4 1.0497 3.9 2.8 Cyg X-3
326.2673 38.2657 10.5 38.0 -108.0 0.7449 1.1 5.6 Cyg X-2
245.7964 1.4475 3.7 45.9 47.4 3.3885 3.1 ------ UNKNOWN
216.6609 69.2903 3.0 46.1 154.2 2.2934 3.9 ------ UNKNOWN
289.8213 68.1432 2.5 32.3 -172.0 1.0959 4.6 ------ UNKNOWN
40.7373 83.5207 3.5 57.2 -173.8 4.2875 3.3 ------ UNKNOWN
Plot creation:
Sun May 31 07:58:35 EDT 2015