2004A&A...416..641F


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.11CET05:09:42

2004A&A...416..641F - Astronomy and Astrophysics, volume 416, 641-646 (2004/3-3)

Survey of long-term variability of stars. I. Reliability of magnitudes in old star catalogues.

FUJIWARA T., YAMAOKA H. and MIYOSHI S.J.

Abstract (from CDS):

The comparison of visual magnitudes of stars compiled in old catalogues is expected to yield information about their long-term magnitude variations. In seven old catalogues whose historical data have been intensively compared, 2123 sampled stars have been studied, disregarding stars that we could not identify, double stars which could be misidentified, or stars observed under poor conditions, and known variable stars with large amplitude discrepancies. The independence of stellar magnitude catalogues is demonstrated by comparing seven old studies to each other, suggesting that the magnitude estimates in each catalogue reflect the brightness at each observational period. Furthermore, by comparing them with a modern star catalogue, the magnitude differences show a Gaussian distribution. Therefore, if they are sufficiently larger than the deduced standard deviations, the magnitude variations between the catalogues can be considered real. Thus, the stellar magnitudes compiled in old studies can be used as scientific data within the average intrinsic uncertainty. These seven old catalogues can be used as data for the survey of the long-term variability of stars.

Abstract Copyright:

Journal keyword(s): stars: general - stars: variables: general - catalogs

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1414 0
2 * bet Per Al* 03 08 10.1324535 +40 57 20.328013 1.70 2.07 2.12 2.08 2.11 B8V 1138 2
3 V* V838 Mon CV* 07 04 04.8222936785 -03 50 50.637499515   15.5   15.18 14.51 M10+B3V 364 0
4 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2157 0
5 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 684 0
6 V* V4334 Sgr NL* 17 52 32.69 -17 41 08.0   12.01       F2Ia 320 0
7 Hen 1-5 pA* 20 11 56.06832 +20 20 04.4916 11.41 10.66 9.45     G8/K0Iae 485 1
8 * alf01 Cap ** 20 17 38.8690959065 -12 30 29.571594020 6.14 5.34 4.27 3.49 2.94 G3Ib 129 0
9 * P Cyg s*b 20 17 47.2020844 +38 01 58.552724 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1128 1
10 * alf02 Cap PM* 20 18 03.2559477 -12 32 41.468352 5.20 4.51 3.58 2.91 2.42 G9III 158 0
11 * del Cep cC* 22 29 10.2650184 +58 24 54.713856 4.71 4.35 3.75   3.219 F5Iab:+B7-8 670 0

    Equat.    Gal    SGal    Ecl

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2019.12.11-05:09:42

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