J/other/Ser/182.35 Corrected proper motion for HIP stars (Damljanovic+, 2011)
Corrected µδ for stars of Hipparcos catalogue from independent latitude
observations over many decades.
Damljanovic G., Milic I.S.
<Serbian Astron. J., 182, 35-41 (2011)>
=2011SerAJ.182...35D 2011SerAJ.182...35D
ADC_Keywords: Positional data ; Proper motions
Keywords: astrometry - reference systems
Abstract:
During the last century, there were many so-called independent
latitude (IL) stations with the observations which were included into
data of a few international organizations (like Bureau International
de l'Heure - BIH, International Polar Motion Service - IPMS) and the
Earth rotation programmes for determining the Earth Orientation
Parameters - EOP. Because of this, nowadays, there are numerous
astrometric ground-based observations (made over many decades) of some
stars included in the Hipparcos Catalogue (ESA 1997, Cat. I/239). We
used these latitude data for the inverse investigations - to improve
the proper motions in declination µδ of the mentioned Hipparcos
stars. We determined the corrections Δµδ and investigated
agreement of our µδ and those from the catalogues Hipparcos and
new Hipparcos (van Leeuwen 2007, Cat. I/311). To do this we used the
latitude variations of 7 stations (Belgrade, Blagoveschtschensk,
Irkutsk, Poltava, Pulkovo, Warsaw and Mizusawa), covering different
intervals in the period 1904.7-1992.0, obtained with 6 visual and 1
floating zenith telescopes (Mizusawa). On the other hand, with regard
that about two decades have elapsed since the Hipparcos ESA mission
observations (the epoch of Hipparcos catalogue is 1991.25), the error
of apparent places of Hipparcos stars has increased by nearly 20mas
because of proper motion errors. Also, the mission lasted less than
four years which was not enough for a sufficient accuracy of proper
motions of some stars (such as double or multiple ones). Our method of
calculation, and the calculated µδ for the common IL/Hipparcos
stars are presented here. We constructed an IL catalogue of 1200
stars: there are 707 stars in the first part (with at least 20 years
of IL observations) and 493 stars in the second one (less than 20
years). In the case of µδ of IL stars observed at some stations
(Blagoveschtschensk, Irkutsk, Mizusawa, Poltava and Pulkovo) we find
the formal errors less than the corresponding Hipparcos ones and for
some of them (stations Blagoveschtschensk and Irkutsk) even less than
the new Hipparcos ones.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 73 1200 The Independent Latitude (IL) catalogue of proper motions in declination
--------------------------------------------------------------------------------
See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP HIP number
8- 15 F8.2 mas/yr pmDE This paper µδ
17- 21 F5.2 mas/yr e_pmDE rms uncertainty on pmDE
23- 30 F8.2 mas/yr pmDE1 Hipparcos I (Cat. I/239) µδ
32- 35 F4.2 mas/yr e_pmDE1 rms uncertainty on pmDE1
37- 44 F8.2 mas/yr pmDE2 Hipparcos 2 (Cat. I/311) µδ
46- 49 F4.2 mas/yr e_pmDE2 rms uncertainty on pmDE2
51- 73 A23 --- Notes Stations and observations used (1)
--------------------------------------------------------------------------------
Note (1):
* the first number is the code (1 = BLZ, 2 = BK, etc., Table 1 below),
* within parentheses is the number of input points r'n for
formula (1);
* the asterisk concerns a Talcott pair where the first star
is the same as the second one (zenith star).
Table 1: Information on IL stations.
-------------------------------------------------------------------------------
IL station, code GLON Observation period Tectonic plate
inst and N (Year) (MJD) motion ("/hyr)
-------------------------------------------------------------------------------
1 Belgrade, BLZ 339.5 44.8 1949.1-1986.0 32935.9-46422.8 0:041(t-t1)
ZT, 142 pairs
2 Blagoveschtschensk, BK 232.5 50.3 1959.2-1992.0 36629.6-48619.7 -0.048(t-t1)
ZT, 96 p.
3 Irkutsk, IRZ 255.7 52.3 1958.2-1991.0 36263.8-48253.7 -0.033(t-t1)
ZT, 32 p.
4 Mizusawa, MZL 219.9 39.1 1967.0-1984.8 39498.6-46008.6 -0.045(t-t1)
FZT, 72 p.
5 Poltava, POL 325.5 49.6 1949.7-1990.4 33183.9-48049.8 0.031(t-t1)
ZT, 59p.(+3)
6 Pulkovo, PU/PUZ 329.7 59.8 1904.7-1992.0 16743.8-48621.7 0.034(t-t1)
ZT, 314 p.
7 Warsaw, VJZ 339.0 52.1 1961.8-1992.0 37598.9-48606.9 0.041(t-t1)
ZT, 141 p.
-------------------------------------------------------------------------------
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Nov-2011