Archive Search Keywords

The following keywords can be given as input parameters for catalogue queries. At least one keyword must be chosen, and selecting two or more will further constrain the query.

For help on a specific keyword, you may click on its link in the input form.

Object Name

The Object Name can refer to any of the names of the object given by the SIMBAD database. Searches are case independent, the full list of objects being retrieved by typing "%" or "*".

Spectral Type

The spectral type of the object. Wildcars ("F%", "F*") are permitted.


A search by object position may be made by specifying coordinates (equinox J2000), and optionally, a search radius around this position.

Right Ascension

The object RA is specified in the format hh:mm:ss.s


The object Dec is specified in the format (+)/-dd:mm:ss


The search radius (great circle distance) around the specified RA and Dec, in the format dd:mm:ss. The default value is 5 arc minutes.The search radius upper-limit is 10 degrees.

Object List

You may query the catalogue by a specific list of objects. The object names may be either typed or pasted into the input box, and must be entered as a column list (one object per row) in either upper- or lower-case, with or without blanks, e.g.:

hd 37660
HD 37756

Signal to Noise Ratio

The Signal to Noise Ratio has been measured at two (Elodie) or three (Feros) wavelengths representing the spectral coverage. The wavelengths were selected according the following criteria:
The following wavelengths were selected accordingly: The mean value of a window of 15 pixel wide centered at the reference wavelengths was adopted. The Signal to Noise Ratio was measured according to the following definitions: Flux is the measured un-normalized flux expressed in photo-electrons, and b is the readout noise, also in photo-electrons.

Select Output

The output menus provide the means to select the format of the output form. To enhance readability, the heading is repeated after every 15th row of table output. Two output fields are available, emphasising respectively Spectroscopy (the default), and Photometry. The output table may be generated in four formats, selected from the pull-down menu as HTML (default), ASCII, CSV and TSV:

HTML format

This format provides the links for plotting and retrieving spectra. It also provides links embedded in the table heading to explanations of each column, and for convenience, the table heading is repeated after every 15th row of output. HTML format is memory intensive on the client- and server-sides, and so the number of 'hits' displayed is limited to 250 (see Show, below). Larger outputs automatically default from HTML to ASCII format.

ASCII format

Output is formatted in plain ASCII text, with columns left justified.

CSV format

Comma-separated values, an output format in ASCII which may be imported into most spreadsheet applications.

TSV format

Tab-separated values, an output format in ASCII which may be imported into most spreadsheet applications.

Order By

The output records (all formats) matching the input query may be sorted by:


You may select to restrict the number of "hits" displayed, i.e. the output page size (all formats). The total number of records matching the input query is indicated, but only the number specified by Show (default 50) is listed in the output page.

For HTML format, if a query returns more than 250 records, and the page size is not limited (Show="all"), the output format automatically defaults from HTML to ASCII. In this event, set Show to a convenient value (50, 100), and navigate HTML output in pages of this size, either by specifying a Page# in the query form, or using the Previous Page and Next Page buttons located at the foot of the output form.

Note: For HTML output, it is generally more efficient to page large queries into several small pages (Show set to 50 or 100 records) than into fewer large pages (250 records).

Page #

If the total number of records matching the input query exceeds the page size specified by Show, you may list specific pages with this option. For example, if Show is 50 and there are 293 records matching the input query, then setting Page # to 4 will list records 151 to 200 (as ordered by the selected sorting criterion). You may also navigate incrementally between output pages by using the Previous Page and Next Page buttons at the foot of the output form.

Show SQL

If this option is selected, the SQL command corresponding to the input query to the catalogue will be displayed at the top of the output form.

Home | COROT | SVO | CAB (INTA-CSIC) | Helpdesk

Last update: May 2014.