3,609 reputation
1239
bio website astro.uni-koeln.de/staff/…
location Cologne, Germany
age 45
visits member for 2 years, 11 months
seen 7 hours ago

Astronomer, interested in star formation, interstellar medium, astrochemistry, doing numerical modelling


Oct
4
awarded  Nice Question
Oct
4
asked Custom arrow shaft
Oct
3
awarded  Popular Question
Oct
3
comment How to plot Error Bars in a 3D scatter plot
Very nice solution +1
Sep
30
revised How do I compute sidereal time and JD?
added additional functionality
Sep
29
comment How do I compute sidereal time and JD?
Great! A pity that I can't give you another +1 for each edit :)
Sep
28
comment How do I compute sidereal time and JD?
@cormullion +1 for the reference. Great page that I also used for many of my implementations.
Sep
28
answered How do I compute sidereal time and JD?
Sep
24
answered Rectangular output for ListContourPlot
Sep
19
comment Fast Spherical Harmonics radiative transfer
@Heike Wow, 3.5 vs. 148.5 seconds. Thank you for the tip.
Sep
19
comment Fast Spherical Harmonics radiative transfer
@J.M. LinearAlgebraMatrixConditionNumber[Table[B[i, m]...` gives 2.63531*10^98 . My comment on the N[#,30] was to remind me that even with N the LinearSolve::luc error occured and that I had to use SetPrecision[#,Infintiy] to get rid of it.
Sep
19
awarded  Nice Question
Sep
18
comment Fast Spherical Harmonics radiative transfer
@J.M.no, didn't notice it. Thanks for the link.
Sep
18
comment Fast Spherical Harmonics radiative transfer
@J.M. Neat! Unfortunately, this is no bottleneck. Still nice to know, thanks.
Sep
18
comment Fast Spherical Harmonics radiative transfer
@J.M. thanks for the edits :)
Sep
18
comment Numerical Differentiation using 1500 data points
@J.M. agreed, but without further knowldge of the posters data it is hard to be more specific. Of course some initial smoothing and hand-massaging of the data might be necessary.
Sep
18
comment Numerical Differentiation using 1500 data points
@ShrabantiDhar That is just an set of example data. Just use your data points (paris of x,y values instead).
Sep
18
asked Fast Spherical Harmonics radiative transfer
Sep
18
answered Numerical Differentiation using 1500 data points
Sep
11
awarded  Caucus