NGC 1976

Number of stars per data source

	Reference    3 :    1 star
	Reference    7 :    3 stars
	Reference   13 :    9 stars
	Reference   15 :   14 stars
	Reference   23 :    2 stars
	Reference   40 :    1 star
	Reference   44 :   48 stars
	Reference   54 :   42 stars
	Reference   55 :   56 stars
	Reference   57 :   52 stars
	Reference  114 :  166 stars
	Reference  201 :  152 stars

References

3: Johnson H.L.; (1964) Tonantzintla Tacubaya 3, 305; The Colors Bolometric Corrections and Effective Temperatures of the Bright Stars; 1964BOTT....3..305J
7: Johnson H.L.; (1965) Astrophys. J. 141, 923; Interstellar Extinction in the Galaxy; 1965ApJ...141..923J
13: Mendoza E.E.; (1966) Astrophys. J. 143, 1010; Infrared Photometry of T Tauri Stars and Related Objects; 1966ApJ...143.1010M
15: Johnson H.L., Mitchell R.I., Iriarte B., Wisniewski W.Z.; (1966) Comm. Lun. Plan. Lab. 4, 99; UBVRIJKL Photometry of the Bright Stars
23: Mendoza E.E.; (1967) Tonantzintla Tacubaya 4, 149; Multicolor Photometry of Stellar Aggregates; 1967BOTT....4..149M
40: Moreno H.; (1971) Astron. Astrophys. 12, 442; On the Transfer of Photometric Systems; 1971A&A....12..442M
44: Penston M.V.; (1973) Astrophys. J. 183, 505; Multicolor Observations of Stars in the Vicinity of the Orion Nebula; 1973ApJ...183..505P
54: Penston M.V., Hunter J.K., O'Neill A.; (1975) Monthly Notices Roy. Astron. Soc. 171, 219; Further Observations of the Orion Nebula Cluster; 1975MNRAS.171..219P
55: Lee T.A.; (1968) Astrophys. J. 152, 913; Interstellar Extinction in the Orion Association; 1968ApJ...152..913L
57: McNamara B.J.; (1976) Astron. J. 81, 845; Pre-main-sequence Masses and the Age Spread in the Orion Cluster; 1976AJ.....81..845M
114: Shulov O.S., Kopatskaya E.N., Khudyakova T.N., Khozov G.V.; (1983) Tr. Astron. Obs. Leningrad 38, 76; UBVRI Photometry of Stars in the Orion Nebula Cluster
201: Shevchenko V.S., Yakubov S.D.; (1992) Soviet Astron. 36, 359; Stellar population of the Orion cluster. Vicinity of NGC 1999; 1992SvA....36..359S