Notes on UK Schmidt Photographic Request Form
Below are some brief notes to help users complete the
on-line application form for UK Schmidt plates
and SuperCOSMOS scans.
The form is intended for applicants who require new or existing UKST
plates, if SuperCOSMOS scans are also required then section 6 should be
completed. Users who already have UKST plates on loan to them but require
SuperCOSMOS scans can miss out sections 4 and 5.
Applicants requesting SuperCOSMOS scans of non-UKST material should
complete the non-UKST application form.
Users wanting UKST plates measured on other machines (eg APM) must first
apply for the plates to be put on loan to them using this form.
Survey A-grades are not freely available for loan but can usually be
available to the measuring machines.
There is a charge for any copies on film or glass requested.
More information can be found in the
SuperCOSMOS web pages.
Notes for Section 3
- Please give a full scientific justification for your request. Try to
this to one side of A4 paper. (If needed figures and references can be inserted on an extra
- Any special observing constraints should be justified here and described in full in section 4
Notes for Sections 4 & 5
- Use standard ESO/SERC survey field centres if possible. Otherwise give
name of object (e.g. NGC 200). Give reasons in section 4 (ii) for
- Co-ordinates are required for non-survey centres (normally to
nearest degree) but may be omitted for standard fields.
- Details of the emulsions and filters available can be found in
the UKSTU web pages.
For new exposures the only emulsion now available is 4415 on film. This can
be used with either the UG1, AAOV (not full aperture), OG590, R630 or
HA659 (not full aperture)
to obtain U, V, OR, R or H-alpha band exposures repspectively. It is not
currently possible to take NEW B or Bj band exposures.
- Indicate clearly whether you are giving magnitude limit or time limit
(i.e. do not write 20m which is ambiguous). For sky limited
- The limit for taking survey plates is 3 arcsec. Proposals
accept slightly poorer conditions stand a much better chance of
being completed quickly than those which require the best conditions.
- Aux. If an objective prism is required write P and
give full details of dispersion, orientation and widening
section 4 (ii).
If a sub-beam prism is required write SBP - any area
of special interest
should be noted in section 4 (ii) because the plate centre may have
to be moved to avoid
special vignetting problems.
- The No. of Plates column should be used to
indicate how many identical plates of a particular type are required
(e.g. for variable star projects or to improve photometric accuracy).
- Indicate in section 4 (ii) or section 5 (ii) whether it is
essential for you to have the original plate.
- Indicate in the Copies column whether you wish to
copies of the original and, if so, how many and whether they are to be
glass. Note: film is much easier for handling and despatch; the
normal density of all copies is 0.5. You will be charged for any copies
- The Destination column should be used to indicate
where the material, in particular the original plates, should be sent. (In many
the destination is not with the applicant but one of the
measuring machines, SuperCOSMOS or APM).
Notes for Section 6
- Enter the details of the required measurements in table 6 (i) and state
any special requirements in the comments section 6 (ii).
- If you want all plates requested in section 4 and/or 5 scanned on SuperCOSMOS (using the same parameters) and you have no particular priorities then in the plate column enter e.g. all in 4.
- The largest possible area will be measured unless otherwise requested.
On 365mm UKST plates this is 322 x 322 mm (6 x 6 degrees)
- Plates will be measured with north at high-y unless otherwise requested.
- The columns threshold and Area cut are relevant to IAM data only.
- If for the IAM data, the Threshold column is left blank, then
a precentage threshold equivalent to 2.5 sigma will be applied (where sigma
is the noise of the sky background at the centre of the plate.