1 - 6 of 6
Number of results to display per page
Search Results
- ID:
- ivo://nao.ua/scs/FONAC
- Title:
- FON Astrographic Catalogue (FONAC, Version 2.0) containing more then 2.0 million stars (J2000, epoch 1991.25)
- Short Name:
- FONAC_Version2.0
- Date:
- 20 Feb 2014 21:58:06
- Publisher:
- Nikolaev Astronomical Observatory
- Description:
- The FONAC 2.0 is a compiled catalogue of positions, proper motions and photometric data for 2,005,137 stars between declinations of +90° and -2°. The mean epoch of positions is 1988.19. The catalogue was compiled using a new reduction of measurements for more than 1700 plates, which were obtained with the wide-angle astrograph of the Main Astronomical Observatory in Ukraine within the FON project. The acronym FON (Russian, Ukrainian) stands for Photographic Survey of the Northern Sky. The ACT Reference Catalogue as well as the Guide Star and USNO A2.0 catalogues were applied for the reductions of positions and determination of photometric characteristics of stars. Median precision of the FONAC data are ±200 mas, ±3 mas/year and ±0.18 mag in positions, proper motions and magnitudes of stars, respectively.
- ID:
- ivo://helio-vo.eu/hps
- Title:
- HELIO Processing Service
- Short Name:
- HPS
- Date:
- 10 May 2013 19:51:03
- Publisher:
- HELIO
- Description:
- Portal that provides access to processing capabilities. Use of the HPS requires user authentication.
- ID:
- ivo://helio-vo.eu/sms
- Title:
- Semantic Mapping Service
- Short Name:
- SMS
- Date:
- 09 May 2013 19:51:10
- Publisher:
- HELIO
- Description:
- Service that performs semantic mapping of terms. Provides functionality to query HELIO ontology.
- ID:
- ivo://nao.ua/scs/ASCC-2.5
- Title:
- Simple cone search for the All Sky Compiled Catalogue (ASCC-2.5, Version 3.0) containing more then 2.5 million stars (J2000, epoch 1988.19)
- Short Name:
- ASCC-2.5_Search
- Date:
- 20 Feb 2014 21:57:45
- Publisher:
- Nikolaev Astronomical Observatory
- Description:
- The All Sky Compiled Catalogue of 2501313 stars (ASCC-2.5) contains reduced data from space catalogues, such as: Hipparcos [I/239], Tycho-1 [I/239], Tycho-2 [I/259], ACT-RC [I/246], TRC [I/250]; and ground-based catalogues, such as: PPM-N [I/146], PPM-S [I/193], PPM-add [I/208], CMC11 [I/256]. The data from the Tycho-2 Spectral Type Catalogue [III/231] and the 2MASS All Sky Catalogue of Point Sources [II/246] are also added. The basic stellar data presented in the ASCC-2.5 are the equatorial coordinates (J2000, epoch 1991.25), proper motions in the Hipparcos system, B and/or V stellar magnitudes in the Johnson system. Additionally, for some stars we give trigonometric parallaxes, spectral classes in the MK or HD system, multiplicity and variability flags, Hipparcos, Tycho-2, HD, DM designations. Equatorial coordinates and their standard errors were taken from the source catalogues in accordance with the priority: Hipparcos [I/239/hip_main], Tycho-2 [I/259], Tycho-1 [I/239/tyc_main], CMC11 [I/256], PPM [I/146,I/193,I/208]. Proper motions from the source catalogues were compared with Hipparcos data. The compiled proper motions in the Hipparcos system and their standard errors were computed as the weighted means. The weights were set in accordance with the proper motion errors listed for individual stars in the source catalogues. Trigonometric parallaxes are taken from the Hipparcos and Tycho-1 catalogues. Stellar B, V magnitudes were determined on the basis of the ground- based photometric data taken from CMC11, Hipparcos, as well as space BT, VT from Tycho-1, Tycho-2. Magnitudes from the PPM catalogue were used if no other photometric data were available. Tycho data were transformed to the Johnson system via: V = VT - 0.09 (B-V)T + dV, (B-V) = 0.850 (B-V)T + d(B-V), i.e. using the recommendations from the Introduction to the Tycho catalogue and including additional corrections dV and d(B-V). These additional corrections were determined by comparison with ground-based data in the Johnson system. These corrections depend non-linearly on colour and reach 0.02 and 0.04 mag, respectively. Infrared stellar magnitudes J, H, K_s and their errors were copied from the 2MASS catalogue. Spectral classes in the MK or HD systems were taken from Hipparcos, CMC11, PPM, and Tycho-2 Spectral Type catalogues. Multiplicity and variability flags were taken from Tycho-1, Tycho-2, Hipparcos, CMC11, and PPM catalogues. Stars in the ASCC-2.5 are divided into 30 files ordered by declination (North and South polar caps and 28 bands of 5 degrees width), and sorted in order of right ascension within each file.
- ID:
- ivo://nao.ua/scs/XPM
- Title:
- XPM catalogue containing absolute proper motions for more then 280 million stars (J2000, epoch 2000.0)
- Short Name:
- XPM_ConeSearch
- Date:
- 17 Jun 2019 14:54:24
- Publisher:
- Nikolaev Astronomical Observatory
- Description:
- We combined data from 2MASS and USNO-A2.0 catalogues in order to derive the absolute proper motions of about 314 million stars distributed all over the sky without gaps in the V magnitude range 10 mag to 20 mag. The proper motions were derived from 2MASS Point Sources and USNO-A2.0 catalogue positions, with the mean epoch difference of about 45 years for the northern hemisphere, and about 17 years for the southern one. Most of the systematic zonal errors inherent in the USNO-A2.0 catalogue were eliminated before calculation of the proper motions. The zero-point of the absolute proper motion frame (the absolute calibration) was specified with the use of about 1.1 million of extended sources from 2MASS and USNO-A2.0. In fields covering the zone of avoidance or those that contain fewer than 25 galaxies, quasi-absolute calibration was performed. The mean formal error of absolute calibration is less than 1 mas/yr. The catalogue contains ICRS positions of stars at 2000.0 epoch, original absolute proper motions, as well as F, J, V, N magnitudes from GSC2.3; B, R magnitudes from USNO-A2.0 and J, H, Ks magnitudes from 2MASS.
