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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
315.3091 -51.1024 0.0024 17.0519 -145.1946 6.6285699 81.107 TRIG_00425151
Foreground time interval of the image:
-6.100 12.349 (delta_t = 18.449 [sec])
Background time interval of the image:
-43.051 -6.100 (delta_t = 36.951 [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 1.024000
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 1.024000
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 1.024000
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)
The mask-weighted light curves based on cleaned DPHs
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 -6.100 sec. to 204.284 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89639 ( -0.0299908 0.0299899 )
Norm@50keV : 1.06253E-02 ( -0.000155008 0.000154966 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.46 using 59 PHA bins.
# Reduced chi-squared = 0.8151 for 57 degrees of freedom
# Null hypothesis probability = 8.394287e-01
Photon flux (15-150 keV) in 210.4 sec: 1.52252 ( -0.0308526 0.0310625 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05525e-05 ( -3.00232e-07 3.00317e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.100 sec. to 204.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81205 ( -0.123363 0.101087 )
Epeak [keV] : 129.012 ( -44.2384 -129.012 )
Norm@50keV : 1.15437E-02 ( -0.00101035 0.00145056 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.8045 for 56 degrees of freedom
# Null hypothesis probability = 8.524033e-01
Photon flux (15-150 keV) in 210.4 sec: 1.50546 ( -0.03831 0.01933 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.04245e-05 ( -3.55408e-07 3.33736e-07 ) ergs/cm2
Band function
Time interval is from -6.100 sec. to 204.284 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.81205 ( 1.55671 6.5189 )
beta : -9.99633 ( 9.99222 19.9922 )
Epeak [keV] : 128.994 ( -34.5703 -128.994 )
Norm@50keV : 1.15407E-02 ( -0.00142235 0.00184815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.8191 for 55 degrees of freedom
# Null hypothesis probability = 8.284571e-01
Photon flux (15-150 keV) in 210.4 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] : 15.7027 ( )
R^2/D10^2 : 0.116836 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1129.20 using 59 PHA bins.
# Reduced chi-squared = 19.8106 for 57 degrees of freedom
# Null hypothesis probability = 5.405626e-199
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.258e-06 4.313e-08
25- 50 5.210e-06 1.241e-07
50-150 8.913e-06 2.062e-07
15-150 1.538e-05 2.409e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 109.944 ( )
Norm : 6.18548 (-0.207247 0.137949)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.80 using 59 PHA bins.
# Reduced chi-squared = 1.558 for 57 degrees of freedom
# Null hypothesis probability = 4.456087e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.319e-06 1.589e-07
25- 50 5.890e-06 1.925e-07
50-150 1.028e-05 2.002e-06
15-150 1.949e-05 2.002e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.03743 (-0.37141 0.386628)
R1^2/D10^2 : 1.74629 (-0.328272 0.424913)
kT2 [keV] : 25.2471 (-1.18918 1.35872)
R2^2/D10^2 : 1.54550E-02 (-0.00288389 0.00328499)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.10 using 59 PHA bins.
# Reduced chi-squared = 1.311 for 55 degrees of freedom
# Null hypothesis probability = 6.068851e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.298e-06 1.809e-07
25- 50 6.109e-06 1.536e-07
50-150 1.033e-05 2.735e-07
15-150 1.973e-05 4.240e-07
Peak spectrum fit
Power-law model
Time interval is from 24.464 sec. to 25.464 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57351 ( -0.0468215 0.0469984 )
Norm@50keV : 0.102938 ( -0.00271548 0.00271466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.21 using 59 PHA bins.
# Reduced chi-squared = 1.249 for 57 degrees of freedom
# Null hypothesis probability = 9.760124e-02
Photon flux (15-150 keV) in 1 sec: 13.1218 ( -0.373821 0.374656 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.65938e-07 ( -2.67776e-08 2.68096e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.464 sec. to 25.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.945834 ( -0.214485 0.204877 )
Epeak [keV] : 90.6319 ( -10.6126 18.5793 )
Norm@50keV : 0.202246 ( -0.0391477 0.0512325 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.40 using 59 PHA bins.
# Reduced chi-squared = 0.7394 for 56 degrees of freedom
# Null hypothesis probability = 9.274075e-01
Photon flux (15-150 keV) in 1 sec: 12.6036 ( -0.402 0.4041 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.32148e-07 ( -2.934e-08 2.9188e-08 ) ergs/cm2
Band function
Time interval is from 24.464 sec. to 25.464 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.820612 ( -0.310528 0.612306 )
beta : -2.04047 ( 2.04047 0.262085 )
Epeak [keV] : 80.3972 ( -24.1077 26.1246 )
Norm@50keV : 0.237488 ( -0.0713167 0.313277 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.97 using 59 PHA bins.
# Reduced chi-squared = 0.7449 for 55 degrees of freedom
# Null hypothesis probability = 9.202746e-01
Photon flux (15-150 keV) in 1 sec: 12.5469 ( -5.5469 -0.4233 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.2976e-07 ( -9.29753e-07 -2.915e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.6935 ( )
R^2/D10^2 : 1.24297 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 260.80 using 59 PHA bins.
# Reduced chi-squared = 4.5754 for 57 degrees of freedom
# Null hypothesis probability = 7.617140e-28
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.356e-08 3.380e-09
25- 50 2.630e-07 9.100e-09
50-150 4.494e-07 2.255e-08
15-150 7.759e-07 2.200e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.408 (-25.8423 -198.433)
Norm : 53.2485 (-1.40614 1.56654)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.92 using 59 PHA bins.
# Reduced chi-squared = 0.8407 for 57 degrees of freedom
# Null hypothesis probability = 7.987727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.327e-07 4.000e-09
25- 50 2.551e-07 7.850e-09
50-150 5.586e-07 1.720e-08
15-150 9.463e-07 3.095e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.93462 (-0.93277 0.995331)
R1^2/D10^2 : 8.07178 (-2.38862 3.94409)
kT2 [keV] : 25.4177 (-2.47773 3.43247)
R2^2/D10^2 : 0.167727 (-0.0660136 0.086105)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.97 using 59 PHA bins.
# Reduced chi-squared = 0.8540 for 55 degrees of freedom
# Null hypothesis probability = 7.710118e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.100e-07 1.004e-08
25- 50 2.643e-07 1.710e-08
50-150 5.503e-07 4.345e-08
15-150 9.247e-07 6.655e-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: 1.40154 ( -0.0400865 0.0400287 )
Norm@50keV : 2.18595E-02 ( -0.000435709 0.000435423 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.77 using 59 PHA bins.
# Reduced chi-squared = 0.8030 for 57 degrees of freedom
# Null hypothesis probability = 8.569130e-01
Photon flux (15-150 keV) in 18.45 sec: 2.66301 ( -0.0611332 0.0613775 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.89581e-06 ( -7.97215e-08 7.98439e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39981 ( -0.04353 0.0388858 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 2.18978E-02 ( -0.000433341 0.00169699 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.89 using 59 PHA bins.
# Reduced chi-squared = 0.8196 for 56 degrees of freedom
# Null hypothesis probability = 8.302481e-01
Photon flux (15-150 keV) in 18.45 sec: 2.66527 ( -0.06518 0.05778 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.89585e-06 ( -7.90029e-08 7.7324e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12003 ( 1.12003 1.12003 )
beta : -1.40154 ( -0.0400236 0.0400468 )
Epeak [keV] : 37.5724 ( -37.5724 -37.5724 )
Norm@50keV : 4.32682E-02 ( -0.0153715 1.54225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.77 using 59 PHA bins.
# Reduced chi-squared = 0.8322 for 55 degrees of freedom
# Null hypothesis probability = 8.079152e-01
Photon flux (15-150 keV) in 18.45 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) = 5.99e-06
S(50-100 keV) = 6.43e-06
T90 vs. Hardness ratio plot
T90 = 63.5519999265671 sec.
Hardness ratio (energy fluence ratio) = 1.07346
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.03132
Count Ratio (50-100 keV) / (15-25 keV) = 0.591184
Mask shadow pattern
IMX = -2.518474948484013E-01, IMY = 1.750738530211234E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-43.051390 -6.100000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6832 -62.6059 7.8 51.5 -33.7 -0.3464 -1.5 9.9 GX 301-2
255.7977 -37.8981 242.0 26.1 36.6 -0.0039 -0.0 9.5 4U 1700-377
256.3994 -36.3947 3.8 26.7 39.9 0.2568 3.1 2.4 GX 349+2
262.9742 -24.7572 11.1 32.1 64.1 0.1295 1.0 2.0 GX 1+4
264.6606 -44.5707 72.9 16.9 31.4 -0.0107 -0.2 8.1 4U 1735-44
270.2652 -25.0132 4.1 28.8 75.5 0.3079 2.8 4.1 GX 5-1
270.1462 -25.6992 5.5 28.2 74.7 0.2195 2.1 8.8 GRS 1758-258
274.1444 -14.1568 47.1 37.8 88.4 -0.0603 -0.2 10.8 GX 17+2
276.0760 -30.3107 2.6 21.9 81.8 0.3890 4.5 8.5 H1820-303
285.0242 -24.8772 11.3 25.4 104.2 0.0935 1.0 2.7 HT1900.1-2455
262.8182 -33.8046 4.1 24.8 52.7 0.2392 2.8 8.7 GX 354-0
283.9196 -82.0349 2.0 31.9 -67.7 0.5578 5.6 ------ UNKNOWN
54.7357 -86.7996 2.4 41.8 -72.7 1.2500 4.8 ------ UNKNOWN
6.2481 -53.0505 1.9 46.0 -123.6 1.8578 5.9 ------ UNKNOWN
13.3795 -74.7917 3.8 40.9 -92.3 0.8903 3.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-6.100000 12.348610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6586 -62.8635 13.1 51.4 -33.9 0.2441 0.9 5.6 GX 301-2
256.0841 -37.8955 15.1 25.9 37.0 0.0827 0.8 5.6 4U 1700-377
256.3177 -36.2856 46.1 26.8 40.0 -0.0284 -0.3 10.0 GX 349+2
263.0833 -24.5874 7.6 32.2 64.5 0.2523 1.5 10.3 GX 1+4
264.5604 -44.4512 9.8 17.0 31.6 0.1029 1.2 7.8 4U 1735-44
270.1404 -25.1068 15.6 28.7 75.2 0.1075 0.7 8.0 GX 5-1
270.4704 -25.8590 7.8 27.9 75.1 -0.2027 -1.5 11.4 GRS 1758-258
273.8844 -14.0516 6.4 38.0 88.0 0.5805 1.8 7.1 GX 17+2
276.1191 -30.4781 6.8 21.7 81.7 -0.1844 -1.7 12.1 H1820-303
284.9503 -25.1022 0.0 25.2 104.0 -0.0640 -0.5 11.9 HT1900.1-2455
262.8222 -33.9779 7.0 24.7 52.4 -0.1847 -1.6 12.0 GX 354-0
317.7454 -23.5382 2.5 35.1 162.8 0.5715 4.6 ------ UNKNOWN
334.6154 -23.0413 2.1 44.9 -178.4 0.8459 5.6 ------ UNKNOWN
315.3091 -51.1024 0.1 17.1 -145.2 6.6287 81.1 ------ UNKNOWN
344.7023 -25.2943 2.5 49.6 -167.2 0.8454 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
63.948600 962.310700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.6830 -44.6548 68.4 33.9 60.1 -0.1574 -0.2 12.6 4U 1735-44
275.8095 -30.4206 3.3 35.7 89.5 4.7770 3.4 6.8 H1820-303
285.2624 -24.9164 0.0 34.8 106.8 -0.5373 -0.4 12.3 HT1900.1-2455
318.3813 3.1903 2.4 54.3 163.2 11.7935 4.8 ------ UNKNOWN
321.5875 2.9018 3.1 54.3 167.2 9.3490 3.7 ------ UNKNOWN
276.0790 -57.9690 3.2 23.4 37.1 1.8813 3.6 ------ UNKNOWN
315.2469 -51.0764 1.8 0.0 95.1 3.1830 6.5 ------ UNKNOWN
321.9823 -37.6805 3.8 14.2 -178.6 1.4319 3.1 ------ UNKNOWN
339.1104 -24.6826 4.1 32.1 -156.9 1.6938 2.8 ------ UNKNOWN
113.9639 -71.6828 3.7 56.3 -28.5 11.3463 3.2 ------ UNKNOWN
Plot creation:
Sun May 31 01:12:48 EDT 2015