Some comments on the astrometric properties of the guide star catalog

Taff, L. G.; Lattanzi, M. G.; Bucciarelli, B.; Gilmozzi, R.; McLean, B.; Jenkner, H.; Laidler, V. G.; Lasker, B. M.; Shara, Michael M.; Sturch, C. R.

doi:10.1086/185704

Cited by 41 publications

(20 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…), photographic plates (uneven response to bending stress, size and distribution of emulsion, low quantum efficiency etc. ), and plate scanner (digitizing errors), individual plate coordinates of the detected objects, as well as their magnitudes and colors, can have varied systematic errors that are dependent on the position, magnitude and color of the same objects, and these systematics can be different for the different survey plates (see for example Taff et al 1990;Morrison et al 1998;Evans & Irwin 1995;Kuimov et al 2000).…”

Section: Catalog Constructionmentioning

confidence: 99%

“…In general we find around 500 stars degree −2 well distributed on the plate. There are several methods for removing the PdE, such as a global plate solution using high-order polynomials, the astrometric MASK (Taff et al 1990;Lattanzi & Bucciarelli 1991), the Infinitely Overlapping Circles (IOC, Taff et al 1992), the sub-plate method (Taff 1989) etc. All these methods have pros and cons: the Schmidt plate distortions would require very complicated global solutions, the MASK method is very sensitive to the number of reference objects and the grid size, the IOC has problems at the plate boundaries and the sub-plate method can lead to non-uniformities.…”

Section: Processing Pipelinementioning

confidence: 99%

See 1 more Smart Citation

Absolute Proper Motions Outside the Plane (Apop)—a Step Toward the GSC2.4

Bucciarelli

et al. 2015

View full text Add to dashboard Cite

We present a new catalog of absolute proper motions and updated positions derived from the same Space Telescope Science Institute digitized Schmidt survey plates utilized for the construction of Guide Star Catalog II. As special attention was devoted to the absolutization process and the removal of position, magnitude, and color dependent systematic errors through the use of both stars and galaxies, this release is solely based on plate data outside the galactic plane, i.e., b 27 | |  . The resulting global zero point error is less than 0.6 mas yr −1 , and the precision is better than 4.0 mas yr −1 for objects brighter than R F = 18.5, rising to 9.0 mas yr −1 for objects with magnitudes in the range 18.5 < R F < 20.0. The catalog covers 22,525 square degrees and lists 100,774,153 objects to the limiting magnitude of R F ∼ 20.8. Alignment with the International Celestial Reference System was made using 1288 objects common to the second realization of the International Celestial Reference Frame (ICRF2) at radio wavelengths. As a result, the coordinate axes realized by our astrometric data are believed to be aligned with the extragalactic radio frame to within ±0.2 mas at the reference epoch J2000.0. This makes our compilation one of the deepest and densest ICRF-registered astrometric catalogs outside the galactic plane. Although the Gaia mission is poised to set the new standard in catalog astronomy and will in many ways supersede this catalog, the methods and procedures reported here will prove useful to remove astrometric magnitude-and color-dependent systematic errors from the next generation of ground-based surveys reaching significantly deeper than the Gaia catalog.

show abstract

Section: Catalog Constructionmentioning

confidence: 99%

Section: Processing Pipelinementioning

confidence: 99%

Absolute Proper Motions Outside the Plane (Apop)—a Step Toward the GSC2.4

Bucciarelli

et al. 2015

View full text Add to dashboard Cite

show abstract

“…This effect has been described extensively by Taff et al (1990b) (for earlier work see Dieckvoß &de Vegt 1966 andFresneau 1978) and has been demonstrated for various Schmidt telescopes (Taff et al 1990a;Bucciarelli et al 1992;Tucholke & Schuecker 1992;Bienaymé 1993;Irwin 1994;Lopez Garcia et al 1994;Abad 1995). The systematics are probably caused by the bending of the plates to the curved focal plane during exposure.…”

Section: Correction For Systematic Errorsmentioning

confidence: 71%

“…Tucholke (email tucholke@astro.uni-bonn.de) Based on observations at the European Southern Observatory, La Silla, Chile may reach 1. 5 (Taff et al 1990a). Comparison of GSC 1.0 positions in overlap regions (where the positions derived from different plates are given individually) show that Magellanic Cloud star positions may have individual errors even larger than this.…”

Section: Introductionmentioning

confidence: 99%

The Magellanic Catalogue of Stars (MACS)

Tucholke

Boer

Seitter

1996

Astron. Astrophys. Suppl. Ser.

View full text Add to dashboard Cite

Abstract. -We have compiled the Magellanic Catalogue of Stars (MACS), a catalogue of positions for 243 561 stars covering large areas around the Large and Small Magellanic Cloud (LMC and SMC). The positions have been measured using ESO Schmidt plates and refer to the FK5 system via the PPM catalogue. A comparison of positions from different plates shows internal errors at a level of 0. 15 to 0. 23. The positional accuracy is estimated to be better than 0. 5 per coordinate for 99% of the stars. The limiting magnitude of the MACS is B ≤ 16. m 3, but the catalogue is not complete: only those stars are included which are undisturbed by close neighbours as verified by visual screening in order to obtain a clean astrometric reference. We introduce for the MACS a nomenclature and numbering system in accord with IAU rules based on position, leaving the possibility to add further stars without upsetting the numbering system. The catalogue is available via the Centre des Données Strasbourg (CDS).

show abstract

“…Starting with the GSC authors (Russel at al., 1990) many astronomers were occupied by the GSC astrometric properties, trying to estimate the more evident systematic errors Taff at al., 1990;Bucciarelli at al., 1993;Roeser et al, 1994;Roeser et al, 1995), but nobody gave, up to now, a solution which could be used in astrometric practice immediately.…”

Section: Introductionmentioning

confidence: 99%

Corrected GSC: Reference catalogue for CCD observations. Now

García

Yagudin

1996

Symp. - Int. Astron. Union

View full text Add to dashboard Cite

Abstract. Astrometrical properties of the Hubble Space Telescope Guide Star Catalogue (GSC) were recently investigated by the same authors through its comparison with the PPM catalogue. In this paper, a new systematic plate-based magnitude dependent error produced by telescope optics and by the incompleteness of plate reduction model has been found after applying a simplified block adjustment procedure. New subroutine for correction of all systematic errors is developed and GSC can be used now as a dense reference catalogue on about 0.4" accuracy level.

show abstract

Some comments on the astrometric properties of the guide star catalog

Cited by 41 publications

References 0 publications

Absolute Proper Motions Outside the Plane (Apop)—a Step Toward the GSC2.4

Absolute Proper Motions Outside the Plane (Apop)—a Step Toward the GSC2.4

The Magellanic Catalogue of Stars (MACS)

Corrected GSC: Reference catalogue for CCD observations. Now

Contact Info

Product

Resources

About