Leicester Database and Archive Service
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ARNIE Query Form Help

Name Resolver

Type the source name into the input box and click on "Resolve Name". ARNIE then uses the
Simbad database to find the source coordinates for the object. If successful, these are displayed in the Cone Search input box on the query form.

Note that due to occasional slow network speeds between the UK and Europe, the name resolver can occasionally take several minutes to return a result. We have, therefore, included a timeout which breaks the network connection after a set-time. The default is 60 seconds, but this can be changed in the Resolver Timeout box on the form.

Search Coordinates

The centre, in the chosen astronomical coordinates system for the region to be searched. Choose the required coordinate system (Equatorial, Ecliptic or Galactic) and the Equinox from the option boxes.

If the coordinates are Equatorial, use one of the following formats for the RA and DEC.

  • Right Ascension (longitude)
    • hh mm ss
    • hh mm.m
    • degrees
  • Declination (latitude)
    • sdd mm ss
    • sdd mm.m
    • sdegrees
e.g. 17 12 31, +45 32 48 or 17 12.52, +45 32.8 or 258.13, +45.547

If the coordinates are Galactic, use one of the following formats for LII and BII.

  • LII (longitude)
    • degrees
  • BII (latitude)
    • sdegrees
e.g. 91.23, -30.12

Note that the longitude and latitude must be separated by a comma.

Search Type

A cone search selects all database entries whose coordinates lie within a specified angular distance of the input longitude and latitude. Square and rectangle searches return all sources within a corresponding region aligned with the (RA,Dec) grid at the epoch of the original catalogue. The search region sizes are given in arcminutes.

Note: To request all entries in the database, leave all fields on the database query form blank.

Filter Search

First choose the database parameter on which you wish to apply a filter from the option box. A filter search can be perfomed either as a match (i.e. select or database entries where parameter = value) or over a range (i.e. select all database entries where minimum <= parameter <= max). You can apply these filters to the databases as inclusive or exclusive filters by selecting the appropriate option.

For a match filter, enter the value for the filter in the Value box, for a range filter, enter the min and max values in the left and right hand Range input boxes respectively.

Note: To request all entries in the database, leave all fields on the database query form blank.

Character Strings

Searches on character strings are case sensitive.

Strings can include the wildcards, asterix (*) and percent (%), which both match variable length strings, or an underscore (_) which matches a single length character.


Acceptable formats for date strings are,

  • Year (Month Day Hrs Mins Secs) Month, Day etc. optional
  • Year.Day e.g. 1992.035

Exposure Time

Exposure times are almost invariably in units of seconds.


The coordinates for a filter should be typed in one of the following formats,

  • Right ascension
    • hh mm ss.s
    • hh mm.m
    • degrees
  • Declination
    • sdd mm ss.s
    • sdd mm.m
    • sdegrees
  • LII
    • degrees
  • BII
    • sdegrees