Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 01/12/2023 - 11:41
Dear data miners, help please to absolute beginner and show the fastest way or the shortest step-by-step algorithm for getting light curves from optimal for variable stars survey.
Hello Mikhail,
Can you please be more specific? What is your goal? What are you interested in?
Are you trying to start your own sky survey or asking about other surveys data?
Cheers,
Sebastian
Sorry, I asked how to use more useful survey for getting additional data, not presented in AID, for better understanding of stars behaviour (known stars from VSX, no more for beginning).
For example, where and how to get additional points for V351 Gem light curve, which has a few evaluations in AID?
I see. Then the best way is to check the VSX external links, that you will find if you scroll down each star detail sheet.
Depending on data availability (some surveys are all-sky but others only surveyed some areas or magnitude ranges), you will have a link to most sources that have data on your star.
Not all surveys are there though, but some like ASAS-SN, CRTS, SuperWASP and ASAS-3 can be queried that way.
Each survey has its own vagaries and you need to learn how to use them.
E.g.: to get all data from ASAS-SN, you have to enter 4300 or so in the "Enter number of days to go back" field, and always re-compute the data.
For ZTF, the most recent data have to be taken fron here using a 2" radius search (they have just released DR15).
TESS and Kepler 2 data can be retrieved from the MAST site.
Try checking all the available databases for data on V0351 Gem and see what you get.
BTW, V0351 Gem happens to have been revised by me only 10 days ago using ASAS-SN and ASAS-3 data so its information is up to date.
See the Revision history of the stars at the bottom of each page to see when data were last updated.
Cheers,
Sebastian
A lot of thanks dear Sebastian! Indeed I have seen your last update on V351 Gem and been surprised by new mininal value. It will be useful to see light curve, but, as I understood your words, there is not easy way, but there is hard and complex way to hidden data :) So last question: is there possibility to get some survay data directly with VStar application?
See https://www.aavso.org/vstar-plugin-library for the Observation Source plugins available in VStar.
David
Dear observers, where can I find spectral type of star, if Simbad classifies it as "star" and shows following other object types:
*(TYC,Gaia), IR (2MASS)
(I recommend writing a new post when you want to ask something new, instead of adding a comment to an existing thread.)
"*(TYC,Gaia), IR (2MASS)" indicate that the object is in those catalogues. Nothing more than that.
And stars may or may not have spectral types in the literature.
SIMBAD is not complete regarding that.
It is better to do a VizieR search and see if the object is in some spectroscopic catalogue like Skiff's catalogue of spectral classifications (compilation from the literature) or in any other publication.
Ultimately you may find some entry in LAMOST or in the Gaia DR3 catalogue (table I/355/paramp). Not the best ones but will give you an idea of what the star is.
Cheers,
Sebastian