The catalogue of existing UKST plates can be SEARCHED
(NB - the column numbers given below do not necessarily match the output given by UKSCAT (the www interface to search the log) as extra spaces have been added to make it easier to read. However the parameters do appear in the same order.)
Columns 1- 2 Plate prefix 3- 7 Plate number 8 Plate suffix 9-11 Survey code (if relevant) 12-15 Non-survey code (T number) 16-20 Field number or other identification 21-25 RA (hhmmt) (t is tenth of a minute, e.g 7105 = 07h 10m 30s) 26-30 Dec (+/-ddmm) 31-36 Date of exposure (yymmdd) 37-40 LST of start of exposure (hhmm) 41-46 Emulsion 47-52 Filter 53-56 Exposure time (mmmt) (t is tenth of a minute, eg 700 = 70 minutes) 57-61 Plate grade 62-64 Prism code (for prism plates only)
First Letter Filter Second Letter Emulsion U None or - - WG 305 B GG 385 B IIA-O J GG 395 J IIIa-J Y GG 455 - - V GG 495 V IIa-D O OG 590 - - R RG 630 R IIIa- F, 4415 OR 098 I RG 715 I IV-N W RG 830 - - Z RG1000 Z IZCertain standard filter/emulsion combinations have been contracted to a single letter code:
U IIa-O or IIIa-J ...emulsion with... UGI ...filter B IIa-O GG 385 J IIIa-J GG 395 V IIa-D GG 495 R IIIa-F, 4415 or 098 RG 630 I IV-N RG 715 Z IZ RG1000
S indicates a sub-beam (Pickering) prism was fitted.
G indicates an objective grating was fitted.
M indicates multiple images.
T indicates the exposure was tracked eg for a comet. Only the target image will be stationary other images will be trailed.
J - Deep IIa-J survey (ESO/SERC survey), Dec -20 to -90
Prefix Filter Size Details Col O2 AAO372 130mm sq Interference filter centred on 3727A ([OII]) HG AAO434 130mm sq " 4340A (H gamma) IF AAO460 130mm sq " 4600A HE AAO468 130mm sq " 4686A (HeII) IF AAO486 130mm sq " 4860A (H beta) O3 AAO500 130mm sq " 5007A ([OIII]) IF AAO540 130mm sq " 5400A IF AAO562 180mm sq " 5620A HE AAO587 130mm sq " 5870A (HeI) O1 AAO630 130mm sq " 6300A ([O1]) IF AAO643 130mm sq " 6430A S2 AAO672 130mm sq " 6725A ([SII]) HA AA0656 250mm sq " 6567A (H alpha) IF MB 675 200mm sq " 6751A IF MB 569 200mm sq " 5696A IF MB 666 200mm sq " 6668A HA MB 657 300mm Mosaic " 6567A (H alpha) HA RG630H 400mm Mosaic " 6567A (H alpha) IF MB 486 200mm sq " 4861A (H beta) IF HZ 580 21cm circ " 5800A IF HZ 600 21cm circ " 6000A IF HZ 620 21cm circ " 6200A IF HZ 640 21cm circ " 6400A IF HZ 660 21cm circ " 6600A X HZUBLK 21cm circ UV-Blocker X VLZ520 150mm sq Waveband (1/2 power): 25nm at 520nm X VLX400 150mm sq Waveband (1/2 power): 45nm at 400nm P HN 32 Linear polarisation P HN 38 Linear polarisation LP HNCP37 Left-handed circular polarisation RP HNCP37 Right-handed circular polarisation
I - Denotes image size larger than 40 microns
Survey plates are normally also given a grade number; the lower the number the better the plate quality. An 'A' grade plate scores 3 or lower.
(I) Shows prism dispersion
(II) Shows prism orientation
(III) Shows if spectra widened or not
UK Schmidt Telescope, Anglo-Australian Observatory