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Questions tagged [simbad]

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Which catalogue has identified objects from Gaia DR3?

I am trying to match objects from a Gaia DR3 dataset having 1 million rows with simbad. I find it difficult to find object type for all the rows as queries using astroquery becomes insanely slow after ...
VADeR's user avatar
  • 51
2 votes
2 answers
203 views

How do I get cross-verification data for Gaia DR3?

I've collected data having 1 million rows of Gaia DR3. I am trying to make a dataset suitable for Machine Learning. I need a target variable which is the stellar object type. My issue is I can't seem ...
VADeR's user avatar
  • 51
2 votes
1 answer
91 views

How to determine errors in coordinates from SIMBAD error ellipse

How to determine errors in ICRS coordinates from the SIMBAD error ellipse, please? Thank you
Elena Greg's user avatar
4 votes
1 answer
215 views

How did this artefact end up in the SIMBAD sky map?

I was randomly looking through the SIMBAD sky map when I came across this artefact. It looks like the projection of a telescopes secondary mirror mount to me but I am wondering how that would end up ...
Liberty's user avatar
  • 115
1 vote
0 answers
106 views

Simbad, NED databases surface magnitude data?

I can't seem to find data about surface magnitude of galaxies in Simbad. I can easily find the apparent and absolute magnitude ... Should I just try to compute the surface magnitude, given the ...
Adrian's user avatar
  • 116
1 vote
1 answer
264 views

How to get coordinates and brightness of all stars from 1 constellation on SIMBAD?

I would like to get the RA and DEC coordinates and brightness data of all stars in the Orion constellation from SIMBAD. I am attempting to do a 'criteria query' but I'm confused about how to sort the ...
planetnimz's user avatar
2 votes
2 answers
735 views

What do the flux letters mean? (U, B, V, R, I, G, J, H, K, u, g, r, i, z)

For any object on Simbad so lets take a random one, http://simbad.u-strasbg.fr/simbad/sim-id?Ident=ton%20618 (Ton 618) I'm trying to get a layman's explanation of Flux. What do the letters stand for, ...
MiscellaneousUser's user avatar