J/A+A/438/377 Kyiv Meridian Axial Circle Catalogue, KMAC1 (Lazorenko+, 2005)
The Kyiv Meridian Axial Circle Catalogue of stars in fields with extragalactic radio sources. Lazorenko P., Babenko Yu, Karbovsky V., Buromsky M., Denisjuk O., Kasjan S. <Astron. Astrophys. 438, 377 (2005)> =2005A&A...438..377L
ADC_Keywords: Positional data; Proper motions; Photometry, CCD; Magnitudes Keywords: astrometry - reference systems - catalogs Abstract: We present results of astrometric observations of faint V<17mag stars in sky strip areas with ICRF objects obtained with the Kyiv meridian axial circle (D=180mm) equipped with a 1040x1160 CCD micrometer. Observations were carried out in a declination zone of 0+30 degrees. The work resulted in a compilation of a catalogue KMAC1 that presents an extension of the ICRF to faint stars in optical domain. The catalogue was obtained in the two versions: with reduction to the space catalogue Tycho2, I/259, (the version KMAC1-T, 159 ICRF fields, 104794 stars) and with reduction to the modern CCD catalogues CMC13 and UCAC2 (I/289) which are given also in the ICRF system (the version KMAC1-CU, 192 ICRF fields, 115032 stars). Due to a large number of CMC13 and UCAC2 stars used as reference, the version KMAC1-CU is of slightly better accuracy, though it may inherit local systematic errors of reference catalogues. Description: The KMAC1-T and KMAC1-CU catalogues contain positions (J2000.0), proper motions and V magnitudes in sky strip ares of about 46'x24' (RAxDE) size centered at the ICRF radio sources. Positions are given at mean epoch of observations. The limiting magnitude is V=17mag. The estimated accuracies are 50-90mag in positions, 0.08mag in photometry and 5-6mas/yr in proper motions for V<15mag stars. Proper motions were computed using the USNO-A2.0 (I/252) catalogue positions as the first epoch. The catalogue contains also B, R, r' and J photometry copied from other sources (USNO-B1.0, I/284, CMC13 and 2MASS, II/246). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 65 192 List of sky strips included in KMAC1-T and KMAC1-CU kmac1cu.dat 150 115032 The catalogue KMAC1-T (159 fields) kmac1t.dat 150 104796 The catalogue KMAC1-CU (192 fields)
See also: I/251 : VLBI International Celestial Reference Frame (ICRF) (Ma+, 1997) I/252 : The USNO-A2.0 Catalogue (Monet+ 1998) I/284 : The USNO-B1.0 Catalog (Monet+ 2003) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) I/259 : The Tycho-2 Catalogue (Hog+ 2000) I/289 : UCAC2 Catalogue (Zacharias+ 2004) I/282 : Carlsberg Meridian Tel. CCD Drift Scan Survey, CMC12 (Evans+, 2002) http://www.ast.cam.ac.uk/~dwe/SRF/cmc13.html : CMC13 Home Page Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 15 A15 --- IAU IAU designations of ICRF radio sources located at centres of sky strips 17- 21 I5 --- NCU Star number in each sky strip contained in the KMAC1-CU catalogue 23- 27 I5 --- NT ? Star number in each sky strip contained in the KMAC1-T catalogue (1)
Note (1): NT may be smaller than NCU due to truncation of outer edges of some sky fields which was carried out in the KMAC1-T.
Byte-by-byte Description of file: kmac1cu.dat kmac1t.dat
Bytes Format Units Label Explanations
1- 6 I6 --- Seq Object (star) sequential number (1) 8- 22 A15 --- IAU IAU designation of the radio source (2) 24- 34 F11.7 deg RAdeg Right Ascension at Eq.=J2000 (3) 36- 45 F10.7 deg DEdeg Declination at Eq.=J2000 (3) 47- 52 F6.3 mag Vmag Johnson V band magnitude 54- 55 I2 --- o_RAdeg Number of detections in RA (4) 57- 58 I2 --- o_DEdeg Number of detections in DE (4) 60- 61 I2 --- o_Vmag Number of detections in V 63- 66 F4.2 arcsec e_RAdeg Internal mean error on RA 68- 71 F4.2 arcsec e_DEdeg Internal mean error on DE 73- 76 F4.2 mag e_Vmag Internal mean error on V 78- 81 I4 mas/yr pmRA ?=9999 proper motion on RA (5) 83- 86 I4 mas/yr pmDE ?=9999 proper motion on DE (5) 88- 91 F4.2 yr EpRA-2000 Epoch of observations on RA minus 2000 93- 96 F4.2 yr EpDE-2000 Epoch of observations on DE minus 2000 98-101 F4.2 yr EpV-2000 Epoch of observations on V minus 2000 103 I1 --- Qual [0/1] Image quality index: 0=ok, 1=non-standard image processing (6) 105-107 F3.1 pix SizeDE Image size for extended objects in DE (7) 109-111 F3.1 pix SizeRA Image size for extended objects in RA (7) 113-117 F5.2 mag Bmag ?=0.00 blue B magnitude from USNO-B1.0 119-123 F5.2 mag Rmag ?=0.00 red R magnitude from USNO-B1.0 125-130 F6.3 mag r'mag ?=0.000 red r' magnitude from CMC13 132-137 F6.3 mag Jmag ?=0.000 infrared J magnitude from 2MASS 139-150 A12 --- USNOB1 USNO-B1.0 (Cat I/284) object designation (99999999999 = ?)
Note (1): All the KMAC1 objects are ordered by Right Ascension. Note (2): The designation refers to the central ICRF object of the sky area. Note (3): Positions are is given at mean epoch of observations and Eq.=J2000.0. Note (4): Unequal number of detections in RA and DE (NRA and NDE) means that a rejection of bad measurements was applied. It may indicate certain problems with image quality not marked by the QUAL. When a very high accuracy of positions is required, please do not use these stars or at least the coordinate which refers to the rejected measurement (e.g. DE, if NDE<NRA). Note (5): Computed using the USNO-A2.0 first epoch positions. Note (6): Qual=1 may indicate indicate centroiding problems of various origin (e.g. binary, unresolved or oversaturated star). Please do not use these stars when a very high accuracy of positions is required. Note (7): The Gaussian image size parameter is given when SizeDE or SizeRA exceed 2pix (1pix=1.394arcsec); FWHM=2.36*SizeDE in DE and FWHM=2.36*SizeRA in RA
Acknowledgements: Yuri Babenko, babenko(at)observ.univ.kiev.ua Peter Lazorenko, laz(at)mao.kiev.ua References: Telnyuk-Adamchuk et al., 2002A&A...386.1153T, Observing programs of the Kyiv meridian axial circle equipped with a CCD micrometer.
(End) Patricia Vannier [CDS] 14-Mar-2005
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