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A Fast Chi-Squared Technique for Period Search of Irregularly Sampled Data
A new, computationally and statistically efficient algorithm, the Fast?2 algorithm (F?2), can find a periodicsignal with harmonic content in irregularly sampled data with nonuniformerrors. The algorithm calculates the minimized ?2 as afunction of frequency at the desired number of harmonics, using fastFourier transforms to provide O(Nlog N) performance. The code for areference implementation is provided.
| A catalogue of eclipsing variables
A new catalogue of 6330 eclipsing variable stars is presented. Thecatalogue was developed from the General Catalogue of Variable Stars(GCVS) and its textual remarks by including recently publishedinformation about classification of 843 systems and making correspondingcorrections of GCVS data. The catalogue1 represents thelargest list of eclipsing binaries classified from observations.
| Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
| The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.
| ICCD Speckle Observations of Binary Stars. XIII. Measurements During 1989- 1994 From the Cerro Tololo 4 M Telescope
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....111..936H&db_key=AST
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תצפית ומידע אסטרומטרי
| קבוצת-כוכבים: | עגור |
| התרוממות ימנית: | 23h25m40.57s |
| סירוב: | -42°53'59.3" |
| גודל גלוי: | 8.302 |
| מרחק: | 348.432 פארסק |
| תנועה נכונה: | 12.5 |
| תנועה נכונה: | -27.8 |
| B-T magnitude: | 8.868 |
| V-T magnitude: | 8.349 |
קטלוגים וכינוים:
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