NGC 1976

Number of stars per data source

	Reference    1 :    1 star
	Reference   27 :    1 star
	Reference   44 :    4 stars
	Reference   59 :   20 stars
	Reference  114 :    1 star
	Reference  137 :   10 stars
	Reference  149 :  128 stars
	Reference  193 :    1 star
	Reference  232 :    2 stars
	Reference  262 :    2 stars
	Reference  316 :    2 stars
	Reference  369 :    1 star
	Reference  382 :    1 star
	Reference  465 :    9 stars
	Reference  496 :    1 star
	Reference  529 :    1 star
	Reference  537 :    2 stars
	Reference  583 :    1 star

References

1: Stromgren B., Perry C.L.; (1965) Astron. J. 71, 709; Institute for Advanced Study, Princeton, N. J. second version, unpublished Crawford D.L., Barnes J.V., Faure B.Q., Golson J.C. Photoelectric Hbeta photometry for 1217 stars brighter than V = 6.5 mag; 1965AJ.....71..709
27: Crawford D.L., Barnes J.V.; (1970) Astron. J. 75, 978; Standard stars for uvby photometry; 1970AJ.....75..978C
44: Crawford D.L., Barnes J.V., Golson J.C.; (1971) Astron. J. 76, 1058; Four-color and Hbeta photometry for bright B-type stars in the northern hemisphere; 1971AJ.....76.1058C
59: Smith M.A.; (1972) Astrophys. J. 175,765; Metallicism in border regions of the Am domain. I. extremely young Am stars in the Orion IC association; 1972ApJ...175..765S
114: Morrison N.D.; (1975) Astrophys. J. 200,113; Photometry of O-type stars,interpreted with reference to model atmospheres; 1975ApJ...200..113M
137: Gronbech B., Olsen E.H.; (1976) Astron. Astrophys. Suppl. 25, 213; Four colour uvby photometry for bright O to G0 type stars south of declination +10; 1976A&AS...25..213G
149: Warren W.H., Hesser J.E.; (1977) Astrophys. J. Suppl. 34, 115; A photometric study of the Orion OB 1 association. I. Observational data; 1977ApJS...34..115W
193: Kilkenny D.; (1978) Mon. Not. R. Astron. Soc. 182, 629; Four-colour photometry of southern early-type stars; 1978MNRAS.182..629K
232: Oblak E.; (1978) Astron. Astrophys. Suppl. 34, 453; uvby beta photometry of wide visual double stars with B, A and F spectral type - I; 1978A&AS...34..453O
262: Oblak E., Chareton M.; (1980) Astron. Astrophys. Suppl. 41, 255; Ages and uvby beta photometry of wide visual binaries - II; 1980A&AS...41..255O
316: Lindroos K.P.; (1983) Astron. Astrophys. Suppl. 51, 161; A study of visual double stars with early type primaries. II. photometric results; 1983A&AS...51..161L
369: Wade B.R., Smithh L.F.; (1985) Mon. Not. R. Astr. Soc. 212, 77; uvby Hbeta photometry of UV-bright stars; 1985MNRAS.212...77W
382: Kilkenny D., Whittet D.C.B., Davies J.K., Evans A., Bode M.F., Robson E.I., Banfield R.M.; (1985) SAAO Circ. 9, 55; Optical and infrared photometry of southern early-type shell stars and pre-main-sequence variables; 1985SAAOC...9...55K
465: Stetson P.B.; (1991) Astron. J. 102, 589; Early type high-velocity stars in the solar neighborhood. IV. Four-color and H-beta photometry; 1991AJ....102..589S
496: Terranegra L., Chavarria-K. C., Diaz S., Gonzalez-Patino D.; (1994) Astron. Astrophys. Suppl. 104, 557; uvby beta photometry of Orion population stars and related objects associated with six star forming regions; 1994A&AS..104..557T
537: Fabregat J., Torrejon J.M., Reig P., Bernabeu G., Busquets J., Marco A., Reglero V.; (1996) Astron. Astrophys. Suppl. 119, 271; Be stars in open clusters. I. uvby Beta photometry; 1996A&AS..119..271F
583: Chavarria-K C., Terranegra L., Moreno-Corral M.A., de Lara E.; (2000) Astron. Astrophys. Suppl. 145, 187; Photometric observations of weak-line T Tauri stars. II. wtts in Taurus-Auriga, Orion and Scorpius OB2-2; 2000A&AS..145..187C