I/290 Pulkovo catalogue of 58483 stars (Pul-3) (Khrutskaya+, 2004)
Pul-3: A catalogue of positions and proper motions of 58483 stars on the ICRS
system at the Pulkovo plates with galaxies.
Khrutskaya E.V.,Khovritchev M.Yu., Bronnikova N.M.
<Izv. Glav. Astron. Obs., 216, 336-348 (2002)>
The Pul-3 catalogue of 58483 stars on the Tycho-2 system.
Khrutskaya E.V., Khovritchev M.Yu., Bronnikova N.M.
<Astron. Astrophys., 418, 357-362 (2004)>
=2002IzPul.216..336K 2002IzPul.216..336K
=2004A&A...418..357K 2004A&A...418..357K
ADC_Keywords: Photographic catalog; Stars, faint; Positional data;
Proper motions
Description:
A catalogue of positions and proper motions of 58483 stars (Pul-3) has
been constructed at the Pulkovo observatory. The Pul-3 is based on the
results of measurements of the photographic plates ((x,y)-data) with
galaxies (Deutsch's plan).
The observations were made with Pulkovo Normal Astrograph (F=3467mm,
D=330mm) during the periods from 1935 till 1960 (the first epoch) and
from 1969 till 1986 (the second epoch). The radius of working field
was 50 arcmin for all plates. The exposure times were 1 hour. All
plates were taken near the meridian.
The measurements of the plates were made at the Pulkovo observatory in
1970-s and in 1980-s with ASCORECORD measuring machine. Photographic
magnitudes of these stars have been determined at the Pulkovo
observatory.
The Pulkovo plates contain stars mainly 12-16.5 magnitudes in 146
field in declination zone from -5 to +85 degrees. The maximal density
of stars in the Pulkovo plates is 500 stars per square degree.
The Tycho-2 catalogue (Cat. I/259) has been used as a reference
catalogue for astrometric reductions of the photographic plates. The
great stars density of the Tycho-2 provides 40-65 reference stars in
working field of the Pulkovo plates.
Only approximate equatorial coordinates of the optical centers of all
plates had been known in initial stage of construction of the Pul-3
catalogue and thus recalculation of ones has been done.
A six-parameter plate model has been used for the astrometric
reduction of the plates.
The residuals of the tangential coordinates of reference stars have
been analysed to investigate residual systematic errors. The coma
parameters have been determined and coma-dependent systematic errors
have been excluded. The magnitude-dependent systematic errors and
color-dependent ones were investigated. The most significant
corrections for magnitude equation have been obtained for stars
brighter than 9 magnitude and fainter than 14 magnitude. The most
significant color corrections have been obtained in equatorial zone
for declinations of stars. The corrected coordinates of all stars have
been determined.
On the whole, recalculation of the plates optical centers and taking
into account of all revealed systematic errors provide improvement of
the accuracy of coordinates of stars on 64mas and 51mas for right
ascension and declination correspondingly.
The new proper motions have been determined for all stars. The mean
position has been calculated at the mean epoch of observations of each
star using it proper motion. The mean epoch of the Pul-3 is 1963.25.
The internal positional accuracy of the Pul-3 catalogue at the mean
epoch of observations is 80mas. The internal accuracy of the proper
motions is 5mas/yr. Comparisons of the Pul-3 with Tycho-2 and ARIHIP
have been done. The Pul-3 external positional accuracy relative to
Tycho-2 is 150mas at the mean epoch of the Pulovo plates.
The Pul-3 catalogue successfully represents the Tycho-2 system for
more than 50000 stars which are fainter than 12 magnitude in 146
fields. The stars from the Pul-3 catalogue may be used as reference
stars for reductions of the positional CCD-observations of the
extragalactic radio sources and small bodies of the Solar system. The
40-years difference between Pul-3 observational epoch and modern epoch
will allow to determine high precision proper motions of the faint
stars of the Pul-3 catalogue (about 2mas/yr-3mas/yr). Proper motions
of stars from Pul-3 catalogue may be used for stellar kinematics
investigations.
There are two data files for user's convenience:
- the file pul3.dat represents the Pul-3 catalogue;
- the file centers.dat contains the equatorial coordinates
of centers of the Pulkovo fields (RA, DE).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
pul3.dat 158 58483 Pul-3 catalogue
centers.dat 83 146 Equatorial coordinates of the centers of the
Pulkovo fields
--------------------------------------------------------------------------------
See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
Byte-by-byte Description of file: pul3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 I7 --- Pul-3 *Pul-3 number
11- 12 I2 h RAh *Right Ascension J2000, at Epoch (hours)
14- 15 I2 min RAm Right Ascension J2000, at Epoch (minutes)
17- 22 F6.3 s RAs Right Ascension J2000, at Epoch (seconds)
26 A1 --- DE- Declination J2000, at Epoch (sign)
27- 28 I2 deg DEd *Declination J2000, at Epoch (degrees)
30- 31 I2 arcmin DEm Declination J2000, at Epoch (minutes)
33- 37 F5.2 arcsec DEs [0,60] Declination J2000, at Epoch (seconds)
41- 44 F4.2 arcsec e_RAs *?=0 rms error in RA*cos(DE)
48- 51 F4.2 arcsec e_DEs *?=0 rms error in DE
55- 61 F7.2 mas/yr pmRA Proper motion in RA*cos(DE)
65- 71 F7.2 mas/yr pmDE Proper motion in DE
75- 79 F5.2 mas/yr e_pmRA *?=0 rms error in pmRA*cos(DE)
83- 87 F5.2 mas/yr e_pmDE *?=0 rms error in pmDE
91- 98 F8.3 yr Epoch Mean epoch of observation
102-105 F4.1 mag Bmag *?=0 B magnitude obtained at Pulkovo
109 I1 --- Npos Number of positions used
113-115 I3 --- Flag *Indicator of overlap fields
119-122 I04 --- TYC1 *?=0 Tycho-2 (Cat. I/259) TYC1 number
123-127 I05 --- TYC2 *?=0 Tycho-2 (Cat. I/259) TYC2 number
128 I01 --- TYC3 *?=0 Tycho-2 (Cat. I/259) TYC3 number
132-137 I6 --- HIP *?=0 HIPPARCOS (Cat. I/239) number
141-143 I3 --- POSSI *?=0 Number from POSS-I survey
147-150 F4.1 mag Busno *?=0 B magnitude from USNO-A2.0 catalogue
154-157 F4.1 mag Rusno *?=0 R magnitude from USNO-A2.0 catalogue
--------------------------------------------------------------------------------
Note on Pul-3:
The first three symbols represent the number of the Pulkovo field,
the last four symbols represent the star number in this field.
Note on RAh, DEd:
Equinox J2000.0, epoch of observation
Note on e_RAs, e_DEs, e_pmRA, e_pmDE:
The values are 0 if the errors were not determined (Npos=2).
Note on Bmag:
The value is 0, if magnitude was not determined.
Note on Flag:
The flag is 1 if star is situated in this field only, or
the flag indicates the number of fields which contain this star.
Note on TYC1, TYC2, TYC3, HIP:
The value is 0 if star is not contained in the Tycho-2 or
Hipparcos catalogues.
Note on POSSI, Busno, Rusno:
The values are 0 if star is not identified with USNO-A2.0 (Cat. I/252)
catalogue.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: centers.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- NField Number of field in the Pul-3
7- 8 I2 h RAh Right Ascension J2000 (hours)
10- 11 I2 min RAm Right Ascension J2000 (minutes)
13- 16 F4.1 s RAs Right Ascension J2000 (seconds)
20 A1 --- DE- Declination J2000 (sign)
21- 22 I2 deg DEd Declination J2000 (degrees)
24- 25 I2 arcmin DEm Declination J2000 (minutes)
27- 28 I2 arcsec DEs Declination J2000 (seconds)
32- 35 I4 --- Nstars Number of stars in field
39- 82 A44 --- ICRF *ICRF Designations
--------------------------------------------------------------------------------
Note on ICRF:
If radio sources from ICRF-Ext.1 (see Cat. I/251 and
http://hpiers.obspm.fr/webiers/results/icrf/Icrf.html) are situated in this
Pulkovo field then their ICRF designations are given.
--------------------------------------------------------------------------------
Author's address:
Evgeniya Vladimirovna Khrutskaya
(End) Evgeniya Vladimirovna Khrutskaya [Central Astron.Obs.of RAS] 07-Oct-2003