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II/36    UBV and uvby-beta observations of Orion OB1 Association  (Warren+ 1977)

Catalogue of Individual UBV and uvby-beta Observations in the Region of the Orion OB 1 Association. Warren W. H. Jr., Hesser J. E. <Astrophys. J. Suppl. 34, 115 (1977)> =1977ApJS...34..115W
ADC_Keywords: Photometry, UBV ; Photometry, uvby, beta ; Stars, OB Description: The Catalogue of Individual UBV and uvby-beta Observations of Stars in the Region of the Orion OB 1 Association presents individual UBV observations of 106 stars in the vicinity of the Orion Nebula (the Sword region) and individual uvby-beta observations of 508 stars in all regions of the Orion OB 1 association. For the UBV data the stars are identified by their Brun (1935) numbers, with cross identifications to the chart numbers used in Warren and Hesser (1977); the uvby-beta stars are identified by the aforementioned chart numbers and HD, BD or P (Parenago 1954) numbers in that order of preference. The catalogue contains the data of all observations and is intended to provide data for investigations of variability in the Orion region. See http://obswww.unige.ch/gcpd/ph01.html for a full description of the UBV system, and http://obswww.unige.ch/gcpd/ph04.html for a description of uvby-beta system. Objects: ---------------------------------- RA (2000) DE Name ---------------------------------- 05 00 +00.9 Ori OB-1 Association ---------------------------------- See also: II/171 : Parenago Catalogue of stars in the area of Ori Nebula File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file ubv.dat 42 357 UBV data uvbybeta.dat 70 1595 uvby-beta data
Byte-by-byte Description of file: ubv.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Brun Number in Brun's catalogue (1935POLyo...1...12B) 6- 8 I3 --- WH ? Number assigned by Warren and Hesser (1977ApJS...34..115W) 10- 15 F6.3 mag Vmag Observed visual magnitude (1) 16 A1 --- u_Vmag [ :] certain nightly V are discordant (2) 18- 23 F6.3 mag B-V Observed B-V (3) 24 A1 --- u_B-V [ :] if uncertain nightly B-V 26- 31 F6.3 mag U-B ? observed U-B color (4) 32- 33 A2 --- u_U-B [ :] if uncertain nightly U-B; two colons if nightly U-B very uncertain. 35- 42 A8 "YY.MM.DD" DATE-UBV [0-9.]! Date of observation in form YY.MM.DD (e.g. 68.12.04 = 4 December 1968).
Note (1): Byte 15 is used only when a night's observations averaged to yield a 5 in the thousandths column. Note (2): The following stars each have a single discordant value which careful inspection of the original data fails to explain; while the existence of these discrepancies may be indicative of variability, it is more likely that they simply reflect an undetected error at the telescope; therefore, they should not be used in forming means; Brun 37 (68.12.05) Brun 62 (68.12.06) Brun 202 (68.12.04) and Brun 244 (68.12.04). Star Brun 490 appears variable in V, which Walker's (1969) data weakly suggest too. Note (3): Byte 23 is used only when a night's observations averaged to yield a 5 in the thousandths column. Note (4): Byte 31 is used only when a night's observations averaged to yield a 5 in the thousandths column.
Byte-by-byte Description of file: uvbybeta.dat
Bytes Format Units Label Explanations
1- 5 I5 --- WH Number assigned by Warren and Hesser (1977ApJS...34..115W) 6- 8 A3 --- m_WH Component identification for multiple systems 10- 18 A9 --- Ident Other identification (1) 20- 25 F6.3 mag Vmag ? V magnitude transformed from y. 27- 32 F6.3 mag b-y ? b-y color index 34- 39 F6.3 mag m1 ? m1 ((v-b) - (b-y)) color index 41- 46 F6.3 mag c1 ? c1 ((u-v) - (v-b)) color index 48- 55 A8 "YY.MM.DD" DATE-uvby [0-9.]? UT date of uvby observation 57- 61 F5.3 mag beta ? beta index 63- 70 A8 "YY.MM.DD" DATE-beta [0-9.]? UT date of β observation
Note (1): HD = Henry Draper Catalogue BD = Bonner Durchmusterung P = Parenago 1954 (Cat. II/171)
Historical Notes: * Record 859 in file ubvybeta has an erroneous value for the V magnitude that needs to be resolved. * Dates, originally written as MM.DDYY, were converted to YY.MM.DD at CDS (February 1996) to allow meaningful time sorting References: Brun, A., 1935, Publ. Obs. Lyon 1, No. 12. =1935POLyo...1...12B Parenago. P. 1954, Trudy Sternberg Astron. Inst., No. 25. =1954TrSht..25....1P Walker, M. F. 1969, Astrophys. J. 155, 447. =1969ApJ...155..447W Warren, W. H. Jr. and Hesser, J. E. 1977, Astrophys. J. Suppl. 34, 115. =1977ApJS...34..115W
(End) C.-H. Joseph Lyu [Hughes STX/NASA] 30-March-1995
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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