scholarly journals Classification Based on 102/Å/mm Objective Prism Spectra

1979 ◽  
Vol 47 ◽  
pp. 479-480
Author(s):  
J.V. Clausen ◽  
K.S. Jensen
Keyword(s):  
Schmidt Telescope ◽  
Objective Prism

Equipped with a 15° F2 objective prism the (45/77/150)cm Schmidt telescope of the Copenhagen university Observatory, Brorfelde yields spectra of 102 A/mm at Hα to a limit of approximately mpg =9.5.

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 On the Astronomical Research With the Torun 60/90 Cm Schmidt Telescope

1984 ◽  
Vol 78 ◽  
pp. 211-214
Author(s):  
A. Woszczyk
Keyword(s):  
Scientific Applications ◽  
Schmidt Telescope ◽  
Sky Survey ◽  
Objective Prism ◽  
Astronomical Research

AbstractThe Torun Schmidt telescope and its scientific applications are described. A special attention is given to the Torun Objective Prism Sky Survey.

A New Planetary Nebula

1989 ◽  
Vol 131 ◽  
pp. 61-61
Author(s):  
E. Capellaro ◽  
M. Turatto ◽  
F. Sabbadin
Keyword(s):  
Planetary Nebula ◽  
Near Infrared ◽  
Galactic Plane ◽  
Schmidt Telescope ◽  
Hα Emission ◽  
Bona Fide ◽  
Photographic Survey ◽  
Objective Prism

The object (α1950 = 18h04m.3; δ1950 = −8o56!4) was discovered in a 103a-E+RG 1 objective prism plate taken with the 92/67-cm Schmidt telescope of the Astrophysical Observatory of Asiago (Italy). It presents only the Hα emission and no stellar continuum; following Kohoutek (1965, 1969, 1972) it is a bona fide planetary nebula. This classification is confirmed by the appearance of the object in the red and infrared plates of the Near Infrared Photographic Survey of the galactic plane (Sabbadin, 1986): it is quite bright in the red plate and almost invisible in the infrared one.

scholarly journals An Automatic Approach for Selecting New HA Emission-Line Galaxies

1994 ◽  
Vol 161 ◽  
pp. 611-614
Author(s):  
O. Alonso ◽  
J. Zamorano ◽  
M. Rego ◽  
J. Gallego ◽  
A.G. Vitores
Keyword(s):  
Emission Line ◽  
Selection Criterion ◽  
Schmidt Telescope ◽  
Objective Prism ◽  
Emission Line Galaxies ◽  
Calar Alto ◽  
Observational Procedure

The most unambiguous way to discover new emission-line galaxies (ELGs) is directly by the presence of their lines, using objective-prism plates of adequate resolution. The first survey using this technique was developed by Smith in 1975 with the 0.6 m CTIO Curtis Schmidt Telescope. The Universidad Complutense de Madrid (UCM) is carrying out a survey of ELGs with the Schmidt Telescope at Calar Alto (Almería, Spain) using the presence of Ha in emission in IIIa-F prism plates as selection criterion. The observational procedure and results are described in Rego et al. 1989; Zamorano et al. 1990; Zamorano et al. 1993.

scholarly journals Slitless Spectroscopy by Photographic and CCD Detectors Across Large Fields

1994 ◽  
Vol 161 ◽  
pp. 709-714
Author(s):  
G. Comte ◽  
C. Surace
Keyword(s):  
Emission Line ◽  
Emission Lines ◽  
Photographic Emulsion ◽  
Subsequent Reduction ◽  
Schmidt Telescope ◽  
Ccd Array ◽  
Objective Prism ◽  
Emission Line Galaxies ◽  
Ccd Detectors

We present a new survey of emission line galaxies, performed with the ESO 1 m Schmidt telescope equipped with the 4° objective prism using IIIa-J photographic emulsion. The plates are digitized with the MAMA microdensitometer. A subsequent reduction of the block scans gives redshifts with a mean accuracy of 160 km/s−1, and spectrophotometric measurements of the intensity and equivalent widths of the principal emission lines. A brief discussion is given of the possible extension of quantitative reduction of slitless spectroscopy to archive plates and future large CCD array frames.

scholarly journals A More Complete Listing of LMC Planetary Nebulae

1984 ◽  
Vol 108 ◽  
pp. 231-232
Author(s):  
N. Sanduleak
Keyword(s):  
Planetary Nebula ◽  
Planetary Nebulae ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Plate Material ◽  
Schmidt Telescope ◽  
Complete Listing ◽  
Objective Prism

In an earlier paper by Sanduleak et al. (1978) a listing was given of 102 confirmed and probable planetary nebulae in the Large Magellanic Cloud detected on objective-prism plates taken with the Curtis Schmidt telescope at Cerro Tololo. Subsequently, deeper coverage was obtained on nitrogen-baked Kodak IIIa-J plates plus GG 455 filter exposed for 90 minutes. The thin prism was again used to provide a dispersion of about 1500 Å mm−1 at Hβ and the spectra were unwidened. An additional 25 planetary nebula candidates were found on this new plate material to show the requisite characteristics, i.e. they display (a) a stellar appearance, (b) [OIII] λλ5007, 4959 strongly in emission, and (c) no evidence of a continuum.

scholarly journals HR Diagrams Derived from the Michigan Spectral Catalogue

1978 ◽  
Vol 80 ◽  
pp. 91-98 ◽  
Author(s):  
Nancy Houk ◽  
Robert Fesen
Keyword(s):  
Magnetic Tape ◽  
South Pole ◽  
Schmidt Telescope ◽  
The South ◽  
Objective Prism ◽  
Using Data

In this paper we present some HR diagrams constructed using data from theMichigan Spectral Catalogues. Houk (1975) has been systematically reclassifying the Henry Draper stars on the MK system, from the south pole northward. Objective-prism plates, with a reciprocal dispersion of 108 Å/mm, have been taken with the Michigan Curtis Schmidt telescope at Cerro Tololo Inter-American Observatory in Chile. The spectra are classified visually from the plates, and the results are put onto IBM cards and magnetic tape from which the catalogues are produced.

scholarly journals Some Results of an Hα Survey in the Taurus Dark Clouds

1998 ◽  
Vol 15 (1) ◽  
pp. 152-154
Author(s):  
Alisher S. Hojaev
Keyword(s):  
Emission Line ◽  
Schmidt Telescope ◽  
Byurakan Astrophysical Observatory ◽  
Dark Clouds ◽  
Objective Prism ◽  
Emission Stars ◽  
Additional Sample

AbstractFrom a series of 4° objective-prism plates obtained on the 1 m Schmidt telescope of the Byurakan Astrophysical Observatory, 20 new Hα emission line stars were found. The intensity of Hα emission line was evaluated for these stars. An additional sample of probable Hα emission stars was also found. We present here details and some observational features of these stars. The total number of Hα emission line stars estimated for the surveyed area is about 80.

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