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J/AZh/88/143 ORICAT Catalog of Stars in Orion Great Nebula (Vereshchagin+, 2011)

Proper motions of stars in the region of the Great Nebula in Orion Vereshchagn S.V., Chupina N.V. <Astron. Zh. 88, 143 (2011)> =2011AZh....88..143V =2011ARep...55..123V
ADC_Keywords: Nebulae ; Positional data ; Proper motions ; Photometry Abstract: Six Tautenburg 2-m Schmidt telescope plates have been used to derive proper motions for 12740 stars down to Blim=18.5 in the region centered at RA=83.45grad, Dec=-5.20grad of the Great Nebula in Orion. Each plate covers a 3x3 grad region of sky, with a scale of 51.4"/mm. The largest difference between the epochs is 36 years. The photographic plates were scanned using Tautenburg Observatory plate scanner. The accuracy of the scans was 0.5micron, and the scale was 1000pixels/mm. The rectangular coordinates x, y and instrumental magnitudes were then determined using a dedicated software. To convert the scanned positions to the equatorial coordinates we adopt reference stars from the ACT catalog. Mean errors of position determinations are 3-4mas. The components of the proper motions and their rms uncertainties were obtained via linear least-squares fit to individual rectangular coordinates as a function of the observing epoch with no less than three epochs for every proper motion. The mean measurement uncertainty is 3.5mas/yr in magnitude interval 15-19 and 5.0mas/yr outside this interval. The photometry has been taken from Walker (1969) for B-magnitudes, and from USNO-A2.0 for R-magnitudes. Mean errors for photometry are 0.03mag in B and 0.25mag in R. The ORICAT is supplemented with the data of Parenago (1954) (stars with numbers greater 17000), and includes 13 577 stars in total. ACKNOWLEDGMENTS. We thank E. Schilbach, N.V. Kharchenko, and R.D. Scholz for numerous discussions of the results, and J. Brunzendorf and H. Meusinger for help in organizing the work at Jena Observatory. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file oricat.dat 281 13577 The ORICAT Catalog of star in Orion
See also: II/171 : Parenago Catalog of Stars in Orion Nebula (Parenago 1954) I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) I/246 : The ACT Reference Catalog (Urban+ 1997) I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007) I/312 : PPMX Catalog of positions and proper motions (Roeser+ 2008) J/A+AS/118/503 : Proper motions of stars in Ori Nebula (Tian+ 1996) Byte-by-byte Description of file: oricat.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Oricat Oricat catalogue number (1) 7- 10 I4 --- Par ? Parenago catalogue number(II/171) 13- 17 I5 --- HIP ? Hipparcos number (I/239) 19- 33 A15 --- PPMX ? PPMX name (HHMMSS.s+DDMMSS, Cat. I/312) 35- 41 I7 --- ACTRC ? ACTRC number (column "AC 2000") (I/246) 44- 55 F12.9 deg RAdeg Right Ascension, degrees (J2000) (2) 58- 69 F12.9 deg DEdeg Declination, degrees (J2000) (2) 71- 77 F7.2 mas/yr pmRA ? Proper motion in RA 79- 85 F7.2 mas/yr pmDE ? Proper motion in DE 87- 91 F5.2 mas/yr e_pmRA ? Standard error in pmRA 93- 97 F5.2 mas/yr e_pmDE ? Standard error in pmDE 99-105 F7.2 mas/yr pmRAM ? Proper motion in RA from McNamara et al. (1989AJ.....97.1427M) (3) 107-113 F7.2 mas/yr pmDEM ? Proper motion in DE from McNamara et al. (1989AJ.....97.1427M) (3) 115-119 F5.2 mas/yr e_pmRAM ? Standard error in pmRAM 121-125 F5.2 mas/yr e_pmDEM ? Standard error in pmDEM 127-132 F6.1 mas/yr pmRAT ? Proper motion in RA from Tian et al. 1966 (J/A+AS/118/503) 134-139 F6.1 mas/yr pmDET ? Proper motion in DE from Tian et al. 1966 (J/A+AS/118/503) 141-143 F3.1 mas/yr e_pmRAT ? Standard error in pmRAT 145-147 F3.1 mas/yr e_pmDET ? Standard error in pmDET 149-154 F6.2 mas/yr pmRAH ? Proper motion in RA from Hipparcos (I/239) 156-161 F6.2 mas/yr pmDEH ? Proper motion in DE from Hipparcos (I/239) 163-166 F4.2 mas/yr e_pmRAH ? Standard error in pmRAH 168-171 F4.2 mas/yr e_pmDEH ? Standard error in pmDEH 173-178 F6.2 mas/yr pmRArH ? Proper motion in RA from Hipparcos new reduction (I/311) 180-185 F6.2 mas/yr pmDErH ? Proper motion in DE from Hipparcos new reduction (I/311) 187-190 F4.2 mas/yr e_pmRArH ? Standard error in pmRArH 192-195 F4.2 mas/yr e_pmDErH ? Standard error in pmDErH 197-202 F6.2 mas/yr pmRAP ? Proper motion in RA from PPMX (I/312) 204-209 F6.2 mas/yr pmDEP ? Proper motion in DE from PPMX (I/312) 211-214 F4.1 mas/yr e_pmRAP ? Standard error in pmRAP 216-219 F4.1 mas/yr e_pmDEP ? Standard error in pmDEP 221-227 F7.2 mas/yr pmRAA ? Proper motion in RA from ACTRC 229-235 F7.2 mas/yr pmDEA ? Proper motion in DE from ACTRC 237-241 F5.2 mas/yr e_pmRAA ? Standard error in pmRAA 243-247 F5.2 mas/yr e_pmDEA ? Standard error in pmDEA 249-255 A7 --- SpType ? Mk spectral type from II/171 257-261 F5.2 mag Bmag ? Calculated B magnitude 263-267 F5.2 mag Rmag ? Calculated R magnitude 269-273 F5.2 mag m9169 ? Magnitude from plate 9169 275-279 F5.2 mag m4275 ? Magnitude from plate 4275 281 I1 --- Npl ? Number of used plates for the proper motions determination
Note (1): Numbering corresponds to the initial list of stars: as stars within 7-10mm of the plate edges have been excluded, catalogue numbering begins with 458. Note (2): equinox J2000, epoch: for stars with number less 17000 epoch J1975.11, for stars with number more 17000 epoch from Parenago (1954, II/171). Note (3): data are taken from: B.J. McNamara, W.J. Hack, R.W. Olson, R.D. Mathien, "A proper-motion membership analysis of stars in the vicinity of the Orion Nebula", 1989AJ.....97.1427M.

(End) Natalya Chupina, Veta Avedisova [INASAN] 05-Sep-2011
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