1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Scenery>
The goal of this example is to exhibit using a Metric and a Spectrum
coded in Python. It is functionaly equivalent to
example-fixed-star-minkowski-cartesian.xml in the main Gyoto example
directory.
An optically thin blob centered on the origin of the coordinate
system, in flat space-time. Computation uses the Cartesian
coordinates.
<Metric kind = "Python">
<Mass unit="sunmass"> 4e6 </Mass>
<Cartesian/>
<Module>gyoto_sample_metrics</Module>
<Class>Minkowski</Class>
</Metric>
<Screen>
<Distance unit="kpc"> 8 </Distance>
<Time unit="yr"> 30e3 </Time>
<FieldOfView unit="microas"> 150 </FieldOfView>
In UTF-8 locales, "microas" may be written "µas".
<Inclination unit="degree"> 90 </Inclination>
In UTF-8 locales, "degree" may be written "°".
<PALN> 0 </PALN>
<Argument> 0 </Argument>
<Resolution> 32 </Resolution>
</Screen>
<Astrobj kind = "FixedStar">
<Radius> 12 </Radius>
<Position> 0 0 0 </Position>
<UseGenericImpact/>
<Spectrum kind="Python">
<Module>gyoto_sample_spectra</Module>
<Class>PowerLaw</Class>
<Constant>0.001</Constant>
<Exponent>0.</Exponent>
</Spectrum>
<Opacity kind="Python">
<Module>gyoto_sample_spectra</Module>
<Class>PowerLaw</Class>
<Constant>0.001</Constant>
<Exponent>0.</Exponent>
</Opacity>
<OpticallyThin/>
</Astrobj>
<Delta> 1e0 </Delta>
<MinimumTime> 0. </MinimumTime>
<Quantities>
Intensity
</Quantities>
One can also specify a unit (if Gyoto was compiled with --with-udunits):
Intensity[mJy/pix²]
Intensity[mJy/µas²]
Intensity[J.m-2.s-1.sr-1.Hz-1]
Intensity[erg.cm-2.s-1.sr-1.Hz-1]
Intensity[mJy.sr-1]
Intensity[Jy.sr-1]
</Scenery>
|
