Questions tagged [astropy]

Question 1

I have some images taken with an Oculus all-sky camera that has a fish-eye lens with a 150-degree field of view. I have tried to perform plate solving using astrometry.net; however, it fails to plate-...

Question 2

I have the "heliocentric galactic" cartesian coordinates of Proxima Centauri as given in the paper Kervella et al 2017 (Table B.1 of https://arxiv.org/abs/1611.03495). I would like to ...

Question 3

Why does this code, using astropy LSR, give the same result in RV despite differing proper motions, i.e. 8.2802 km/s? I would expect that a change in proper motion should have an influence in the ...

Question 4

I'm trying to combine science images (not calibration) either with IRAF imcombine task or with ccdproc.combine python function, to then perform photometry with IRAF phot task. The issue is that with ...

Question 5

I have an SDSS r-band image as fits file which uses TAN- projection as per its header. EQNX_SCN= 2000.00 / Equinox of the scan great circle. (years) NODE = 95.00000 / RA ...

Question 6

I am trying to plot velocity vs distance and I want to use the first value of the vel column that contains (27.6688482, -107.85711868, -3.54249031). I got this data by running the code DR3B['vel'] = ...

Question 7

I'm trying to code such that I can import a table of DR3 data, including radial velocity, update the table using SkyCoord codes so that I can plot the velocity vs distance that I am expecting to show ...

Question 8

I want to convert some Cartesian vectors between the Geocentric Celestial Reference Frame (GCRF) and Earth-centered J2000 frame. I know that these two frames are nearly identical and, for most ...

Question 9

I'm trying to use astropy to plot a simulation of the solar eclipse that we had in Exmouth 20 April 2023 11:31 Local time. I'm a programmer not a physist! So after much messing around I tried this: <...

Question 10

I am trying to do a scatter plot of a few data points on a region of the sky and then add a circle to the plot. Note, that I don't want a plot of the full sky, just of the region around the data ...

Question 11

I was able to get my hands on some NIRspec IFU data cubes from JWST, and I was trying to combine two adjacent FOVs for getting the complete picture of my system. I used CASA prior to this to remove ...

Question 12

I have a bunch of files containing sources with galactic l and b values. What I want is to redistribute the sources such that each new file contain sources that fall within 15 degrees of a central l,b ...

Question 13

I'm new to this, and am trying to convert GPS Time to J2000 time using python and Astropy. Here's what I've come up with: ...

Question 14

So I'm interested in knowing how the CDS calculates the J2000 equatorial coordinates from the Gaia DR3 equatorial coordinates (that are given in epoch 2016.0). For example, for the star HD 308819 = ...

Question 15

Between 1582 and 1588, Tycho Brahe observed $\alpha$ Arietis from Uraniborg (55°54′28″N 12°41′48″E) on at least 27 separate occasions and made a record of the right ascension of the star (see Opera ...

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Questions tagged [astropy]

Astrometry.net plate solving with fish eye lens

Converting heliocentric galactic coordinates to ICRS using astropy

Astropy - radial velocities relative to the Local Standard of Rest

How to combine science images correctly?

Conversion from TAN- projection to SIN- projection

Plotting Astropy .velocity output

Plot stellar velocity vs distance using astropy - error

Tool to convert between GCRF and (Earth-centered) J2000 reference frames

Plotting the progress of an eclipse

Code a scatter plot on a region of the sky with a circle

Co-adding IFU data cubes

Tiling the sky with astropy-healpix

Convert GPS Week and GPS Time of Week to J2000?

Gaia coordinates in J2000 as done by the CDS

Position of Hamal (alpha Arietis) between 1582 and 1588

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