scholarly journals A Search for Distant Satellites of Neptune

1998 ◽  
Vol 15 (3) ◽  
pp. 325-327 ◽  
Author(s):  
Michael J. I. Brown ◽  
Rachel L. Webster
Keyword(s):  
Wide Field ◽  
Schmidt Telescope ◽  
Uranian Satellites ◽  
The Uk

AbstractThe recent discovery of two distant satellites of Uranus suggests that there could be similar bodies orbiting Neptune. Previous surveys for distant satellites of Neptune have had relatively bright magnitude limits (BJ ≃ 20·5) and would have missed satellites with magnitudes and colours similar to the two recently discovered Uranian satellites (R ~ 20·4 and R ~ 21·9). We have searched for satellites of Neptune to a limiting magnitude of R ~ 21 in a 0·1□° region centred on the planet. This search is up to ~ 2 magnitudes deeper than the previous wide field search for distant satellites by the UK Schmidt Telescope. Nereid was easily recovered by the search and no large variations of its magnitude were detected.

scholarly journals Deep Wide-field Hα Images of the Magellanic Clouds

1999 ◽  
Vol 190 ◽  
pp. 95-96
Author(s):  
D. H. Morgan ◽  
Q. A. Parker ◽  
S. Phillipps
Keyword(s):  
Emission Line ◽  
Magellanic Clouds ◽  
Wide Area ◽  
Wide Field ◽  
Schmidt Telescope ◽  
Preliminary Results ◽  
Fine Grained ◽  
The Uk

A new Hα survey of the Magellanic Clouds which is being carried out on fine-grained Tech-Pan emulsion with the UK 1.2m Schmidt Telescope will have the best combination of depth and resolution of any that cover such a wide area in and around the Magellanic Clouds. Preliminary results show that the films will provide identifications of new emission-line stars and nebulae.

scholarly journals The Second Palomar Sky Survey

1994 ◽  
Vol 161 ◽  
pp. 29
Author(s):  
I.N. Reid
Keyword(s):  
Northern Hemisphere ◽  
Near Infrared ◽  
Field Survey ◽  
Wide Field ◽  
Schmidt Telescope ◽  
Sky Survey ◽  
Acceptable Quality ◽  
Original Survey ◽  
The Uk

The 48-inch Oschin Schmidt telescope at Palomar Observatory was used to obtain the first deep, optical, wide-field survey, covering almost two-thirds of the sky between November 1949 and December 1958 (with plates for the Whiteoak extension, to δ c = −42°, taken in 1964/5). The original survey was taken in two passbands — wide blue and narrow red — on 103a emulsion, and covers one hemisphere in 643 fields with a spacing of 6 degrees between centres. In 1987, plate-taking started for the second Palomar Sky Survey, POSS II, which is intended to cover the northern hemisphere in three passbands, blue (IIIa-J + GG385 filter), red (IIIa-F + RG610) and near-infrared (IVN + RG9). Given the extremely restricted overlap between fields in the old survey, we have followed the example of the UK Schmidt ESO/SERC surveys and have adopted a 5-degree spacing between fields. To date (31.7.93), we have acquired plates of acceptable quality for 597 fields (67%) of the IIIa-J survey, 668 fields (75%) of the IIIa-F and 253 fields (28%) of the IVN.

scholarly journals A Deep Wide-Field Survey from Digitally Stacked Schmidt Plates

1994 ◽  
Vol 161 ◽  
pp. 177-181
Author(s):  
M.R.S. Hawkins
Keyword(s):  
Large Scale ◽  
Field Survey ◽  
Monitoring Programme ◽  
Wide Field ◽  
Schmidt Telescope ◽  
Large Numbers ◽  
The Uk

Over the last 18 years or so a large-scale monitoring programme has been undertaken with the UK 1.2 m Schmidt telescope in field 287 at 21h 28m, −45 deg. Plates have been taken over all timescales from 1 hour to 17 years in red and blue passbands, and large numbers of plates have also been taken in other passbands to give deep coverage in U, B, V, R and I. The field is calibrated with some 200 CCD and photoelectric standards, and covers approximately 25 square degrees.

scholarly journals A Flair for Multi-Object Spectroscopy

1994 ◽  
Vol 161 ◽  
pp. 85-88 ◽  
Author(s):  
Q.A. Parker ◽  
F.G. Watson
Keyword(s):  
Current System ◽  
Cost Effective ◽  
Wide Field ◽  
Single Object ◽  
Schmidt Telescope ◽  
Astronomical Observations ◽  
Spectroscopy System ◽  
Single Night ◽  
The Uk

Unique in the regime of wide-field astronomy is the multi-object spectroscopy system ‘FLAIR’ developed for the UK Schmidt Telescope (UKST). The current system can perform simultaneous observations of ∼ 90 objects across 40 sq. degrees of sky. FLAIR has given a whole new platform for performing astronomical observations with a Schmidt telescope in a non-photographic role. The system is simple to operate, highly stable, easy to interchange with standard photography and outclasses single-object spectroscopy systems on 2.0 m class telescopes for many types of observation. The system has continued to be developed to enhance its flexibility, robustness and versatility, culminating recently in the commissioning of new fibre feeds and formats. The facility to observe independent standard stars, and the capability of observing objects in two UKST fields in a single night has recently been demonstrated. FLAIR is a powerful, cost-effective addition to the instrumental repertoire of the Anglo-Australian Observatory in a way that was not even remotely envisaged when the UKST was built.

scholarly journals Wide-Field Galaxy and Cluster Surveys Using Cosmos

1994 ◽  
Vol 161 ◽  
pp. 632-634 ◽  
Author(s):  
H.T. MacGillivray ◽  
D.J. Yentis
Keyword(s):  
Magellanic Clouds ◽  
Wide Field ◽  
Schmidt Telescope ◽  
Royal Observatory ◽  
The Uk ◽  
Field Galaxy

We have recently completed a catalogue of ∼ 5 million galaxies in the Southern sky down to a limit of bj = 20.5. The catalogue is based on the ROE/NRL Southern Sky Object Catalogue (Yentis et al. 1992), which is the result of processing of scans made with the COSMOS machine at the Royal Observatory Edinburgh (ROE) on glass copies of the IIIa-J survey carried out with the UK Schmidt Telescope (UKST) in Australia. The ‘COSMOS/UKST Southern Sky Galaxy Catalogue’ is based on 500 fields with |b| > 25 degrees and outwith the Magellanic Clouds.

scholarly journals Low-dispersion spectroscopy of blue stars from the UK Schmidt Telescope UBVRI survey

1992 ◽  
Vol 258 (3) ◽  
pp. 521-526 ◽  
Author(s):  
D. E. Holmgren ◽  
R. J. H. McCausland ◽  
P. L. Dufton ◽  
F. P. Keenan ◽  
D. Kilkenny
Keyword(s):  
Schmidt Telescope ◽  
The Uk ◽  
Low Dispersion

scholarly journals Automated Quasar Detection

1983 ◽  
Vol 104 ◽  
pp. 31-31
Author(s):  
Roger G. Clowes ◽  
John A. Cooke ◽  
Steven M. Beard
Keyword(s):  
Selection Effects ◽  
Schmidt Telescope ◽  
Royal Observatory ◽  
Objective Prism ◽  
Measuring Machine ◽  
The Uk

The existing spectral searches for quasars have increased the number of quasars known very substantially but have not contributed proportionately to an understanding of the collective properties because of the selection effects. To fully exploit the spectral searches we have developed the technique of automated quasar detection (AQD) using objective-prism plates from the UK Schmidt Telescope, the COSMOS measuring machine at the Royal Observatory Edinburgh, and the STARLINK nodes at Durham and Edinburgh.

scholarly journals Objective-Prism Galaxy Redshifts in Fields Around the South Galactic Pole

1984 ◽  
Vol 78 ◽  
pp. 405-408 ◽  
Author(s):  
Q.A. Parker ◽  
H.T. MacGillivray ◽  
R.J. Dodd ◽  
J.A. Cooke ◽  
S.M. Beard ◽  
...  
Keyword(s):  
Large Scale ◽  
Schmidt Telescope ◽  
The South ◽  
Large Numbers ◽  
Objective Prism ◽  
The Uk

AbstractMeasurements made with the COSMOS machine on deep objectiveprism photographs taken with the UK 1.2m Schmidt Telescope are being used to obtain approximate redshifts (accurate to ~ 0.01 in z) for large numbers of galaxies in fields near the South Galactic Pole. The data are suitable for investigations of the distribution of galaxies, such as the detection of large-scale density enhancements or voids.

scholarly journals An Emission-Line Galaxy Survey with the UK Schmidt Telescope

1987 ◽  
Vol 121 ◽  
pp. 53-55
Author(s):  
M. Kalafi ◽  
A. Savage ◽  
A.R. Good ◽  
R.D. Cannon ◽  
M.G. Yates
Keyword(s):  
Emission Line ◽  
Large Scale ◽  
Preliminary Investigation ◽  
Schmidt Telescope ◽  
Large Area ◽  
Number Magnitude ◽  
Emission Line Galaxies ◽  
Galaxy Populations ◽  
The Uk ◽  
Line Galaxy

The use of objective prisms in conjunction with the large area coverage afforded by Schmidt telescopes provides a very powerful means of detecting large numbers of emission-line galaxies, and allows one to study their large scale distribution. An important question that has yet to be fully addressed is the relationship between the number-magnitude distributions of the normal field galaxy and emission-line galaxy populations. A comparison such as this would effectively probe the evolution with time of these active objects. For example, study of the distant (z = 0.458) cluster of galaxies associated with 3C 295 (Dressler & Gunn 1983) indicates that emission-line objects may have been far more numerous in the past than at present. As a preliminary investigation in advance of a larger project, we report here on a search for emission-line galaxies in four United Kingdom 1.2m Schmidt Telescope (UKST) objective prism fields.

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