Bibliography and citation count of the Lowell Observatory 21 inch telescope, 1954–2006 More than 150 journal articles since 1954 use data from the 21-inch. Papers cited more than 50 times in the NASA ADS database are listed in boldface.

Citation Count: 41- Blaauw, A., and Morgan, W.W. 1954. The space motions of AE Aurigae and μ Columbae with respect to the Orion nebula. ApJ, 119, 625 130- Johnson, H. L., and Harris, D. L. 1954. Three-color observations of 108 stars intended for use as photometric standards. ApJ, 120, 195 15- Morgan, W. W., Johnson, H. L.., and Roman, N. G. 1954. A very red star of early type in Cygnus. PASP, 66, 85 (Notes from Observatories) Hardie, R. H. Photometry with the Lowell 20-inch telescope. AJ, 59, 323 (abstract) 26- Johnson, H. L., and Morgan, W. W. 1955. Some evidence for a regional variation in the law of interstellar reddening. ApJ, 122, 142 189- Johnson, H. L., and Knuckles, C. F. 1955. The Hyades and Coma Berenices star clusters. ApJ, 122, 209 39- Hardie, R. H. 1955. A study of RR Lyrae in three colors. ApJ, 122, 256 55- Johnson, H. L., and Morgan, W. W. 1955. Photometric and spectroscopic observations of the double cluster in Perseus. ApJ, 122, 429 Hardie, R. H., and Giclas, H. L. 1955. A search for solar variation. ApJ, 122, 460 Johnson, H. L., and Gardiner, A. J. 1955. The magnitude and color of Mars during the 1954 opposition. PASP, 67, 74 1- Huffer, C. M., and Kopal, Z. 1955. Studies of the darkening coefficient in three wave lengths. AJ, 60, 164 (abstract with data) 96- Johnson, H. L., and Hiltner, W. A. 1956. Observational confirmation of a theory of stellar evolution. ApJ 123, 267 33- Popper, D. M. 1956. Rediscussion of eclipsing binaries. II. S Antliae. ApJ, 124, 208 1- Mitchell, R. I. 1957. Color-magnitude diagram of the α Persei cluster. PASP, 69, 392 (abstract) 20- Mitchell, R. I., and Johnson, H. L. 1957.The color- magnitude diagram of the Pleiades. ApJ, 125, 414 Mitchell, R. I. 1957. Photometric observations of Uranus and Neptune. PASP, 69, 565 (Notes from Observatories) 29- Johnson, H. L., and Knuckles, C. F. 1957. Three-color photometry of nearby stars. ApJ, 126, 113 27- Popper, D. M. 1957. Photoelectric observations of eclipsing binaries. ApJS, 3, 107 3- Popper, D. M. 1957. The giant eclipsing binary, RZ Cancri, AJ, 62, 29 (abstract with data) 18- Hardie, R. H. 1958. Light variation of the spectrum variable HD 124224. ApJ, 127, 620 137- Johnson, H. L., and Mitchell, R. I. 1958. The color- magnitude diagram of the Pleiades cluster. II. ApJ, 128, 31 127- Johnson, H. L. 1958. The intrinsic colors of early-type stars. Lowell Obs. Bull., 4, 37 (no. 90) 92- Johnson, H. L., and Iriarte, B. 1958. The luminosities of early-type stars. Lowell Obs. Bull., 4, 47 (no. 91) 10- Sharpless, S. 1958. The distribution of M-type supergiants: 1. Red supergiants near h and χ Persei and 30 Doradus. PASP, 70, 392 de Vaucouleurs, G. 1958. Photoelectric photometry of the Andromeda Nebula in the U, B, V system. PASP, 70, 453 (sbstract) 245- de Vaucouleurs, G. 1958. Photoelectric photometry of the Andromeda nebula in the U, B, V system. ApJ, 128, 465 4- Johnson, H. L. 1959. On the luminosities of early-type stars. Lowell Obs. Bull., 4, 87 (no. 94) 1- Sinton, W. M. 1959. The albedos and phase variations of Uranus and Neptune. Lowell Obs. Bull., 4, 93 (no. 95) 8- Johnson, H. L., and Iriarte, B. 1959. The Sun as a variable star. Lowell Obs. Bull., 4, 99 (no. 96) 4- de Vaucouleurs, G. 1959. Magnitudes and colors of galaxies in the UBV system. Lowell Obs. Bull., 4, 105 (no. 97) de Vaucouleurs. G. 1959. Photoelectric photometry of Messier 33 in the U, B, V system. Observatory, 79, 143 (Notes from Observatories) Johnson, H. L. 1959. Additional magnitudes and colors of galaxies. Lowell Obs. Bull., 4, 115 (no. 98) 22- Johnson, H. L. 1959. The integrated magnitudes and colors of globular clusters. Lowell Obs. Bull., 4, 117 (no. 99) 14- Iriarte, B. 1959. Photoelectric photometry of faint blue stars. Lowell Obs. Bull., 4, 130 (no. 101) 101- de Vaucouleurs, G. 1959. Photoelectric photometry of Messier 33 in the U, B, V system. ApJ, 130, 728 Sinton, W. M. 1959. Photoelectric magnitudes and colors of Comet Burnham 1958a. PASP, 71, 12 4- Spinrad, H. 1959. Note on AN Serpentis. PASP, 71, 542. (Notes from Observatories) 32- Abt, H. A., and Hardie, R. H. 1960. The 1.3-day variable BL Herculis. ApJ, 131, 155 40- de Vaucouleurs, G. 1960. The apparent density of matter in groups and clusters of galaxies. ApJ, 131, 585 27- Borgman, J. 1960. Seven-colour photometry of O, B, and A stars. BAN, 15, 255 20- Johnson, H. L. 1960. The galactic cluster M35 = IC 4725. ApJ, 131, 620 89- Mitchell, R. I. 1960. Photometry of the α Persei cluster. ApJ, 132, 68 17- Weaver, H., Steinmetz, D., and Mitchell, R. 1960. Photoelectric observations of northern Cepheid variable stars. Lowell Obs. Bull., 5, 30 (no. 110) Sinton, W. M. 1961. Photoelectric observations of comets Giacobini-Zinner, 1959b and Burnham, 1959k. Lowell Obs. Bull., 5, 54 (no. 111) 7- Knuckles, C. F., Sinton, M. K., and Sinton, W. M. 1961. UBV photometry of Venus. Lowell Obs. Bull., 5, 153 (no. 115) 3- de Vaucouleurs, G. 1960. Nova V723 Scorpii 1952. ApJ, 132, 681 Mitchell, R. I. 1961. NGS 6639 and Cepheid X Sct. ApJ, 133, 728 17- Popper, D. M. 1961. Rediscussion of eclipsing binaries. VI. The masses of the components of zeta Aurigae. ApJ, 134, 828 3- Serkowski, K. 1961. The Sun as a variable star. II. Lowell Obs. Bull., 5, 157 (no. 116) Rakos, K. 1961. Photoelectric investigation of magnetic and spectrum variable stars. Lowell Obs. Bull., 5, 227 (no. 117) 19- Huffer, C. M., and Collins II, G. W. 1962. Computation of elements of eclipsing binary stars by high-speed computing machines. ApJS, 7, 351 85- Johnson, H. L., Mitchell, R. I., and Iriarte, B. 1962. The color-magnitude diagram of the Hyades cluster. ApJ, 136, 75 36- Rakos, K. 1963. Photoelectric investigation of magnetic and spectrum variable stars. Lowell Obs. Bull., 6, 91 (no. 121). 6- Borgman, J. 1963. Seven-colour photometry of A, F, G., K, and M stars. BAN, 17, 58 4- Borgman, J. 1964. Note on the Algol system. BAN, 17, 111 57- Borgman, J., and Blaauw, A. 1964. Luminosities and photometric distances of early-type stars. BAN, 17, 358 15- Gehrels, T., and Silvester, A. B. 1965. Wavelength dependence of polarizaiont. V. Position angles of interstellar polarization. AJ, 70, 579 46- Serkowski, K. 1965. Polarization of galactic clusters M25, NGC 869, 884, 1893, 2422, 6823, 6871, and association VI Cygnus. ApJ, 141, 134 87- Krzeminski, W. 1965. The eclipsing binary U Geminorum. ApJ, 142, 105 8- Jerzykiewicz, M. 1965. Two-color photoelectric photometry of delta Ceti. Lowell Obs. Bull., 6, 175 (no. 127) Jerzykiewicz, M. 1966 Possibility of a beat phenomenon in the light variation of delta Delphini. Lowell Obs. Bull., 6, 249 (no. 133) 15- Jerzykiewicz, M., and Serkowski, K. 1966. The Sun as a variable star. III. Photometry of Uranus, Neptune, and F and G type stars. Lowell Obs. Bull., 6, 295 (no. 137) 2- Jerzykiewicz, M., and Serkowski, K. 1966. Fifty standard stars for yellow and blue magnitudes in the UBV system. PASP, 76, 546 9- Millis, R. L. 1966. The variability of beta Cassiopeiae. PASP, 78, 340 (Notes from Observatories) 3- Oetken, V. L. 1966. Weitere messungen zur elliptischen polarisation des kontinuierlichen lichtes des Crab- Nebels. AN, 289, 181 12- Serkowski, K. 1966. Long period variable stars with large intrinsic polarization. IBVS 141 35- Krzeminski, W., and Serkowski, K. 1967. Photometric and polarimetric observations of the nearby strongly reddened open cluster Stock 2. ApJ, 147, 988 5- Millis, R. L. 1967. Photoelectric observations of two new short-period variables. PASP, 79, 262 (Notes from Observatories) 6- Barnes, R. C., Hall, D. S., and Hardie, R. H. 1968. Absolute dimensions of CM Lacertae. PASP, 80, 69 2- Jerzykiewicz, M. 1968. Note on gamma Boo. IBVS 319 Jerzykiewicz. M. 1968. Further evidence of the extinction of starlight by the interplanetary medium. Acta Astr., 18, 437 Jerzykiewicz, M., and Serkowski, K. 1968. A search for solar variability. Met. Monog., 8, 142 1- Jerzykiewicz, M., and Opolski, A. 1968. Evidence of absorption by the interplanetary medium. PASP, 80, 101 (Notes from Observatories) Millis, R. L. 1968. An investigation of the delta Scuti stars. AJ, 73, 26 (abstract) 38- Serkowski, K. 1968. Intrinsic polarization of the Mira variables. ApJ, 144, 857 4- Rakos, K. 1968. Light variations of the spectrum variable HD 4778 = HR 234. PASP, 80, 324 7- Albrecht, R., Maitzen, H. M., and Rakos, K. D. 1969. The Sun as a variable star. A&A, 3, 236 4- Wehinger, P. A. 1968. Photometry of the eclipsing system BR Cygni, AJ, 73, 159 49- Simonson III, S. C. 1968. A spectroscopic and photometric investigation of the association Cepheus OB2. ApJ, 154, 923 15- Hall, D. S., and Hardie, R. H. 1969. A UBV photometric study of MR Cygni. PASP, 81, 75 Jerzykiewicz, M. 1969. UBV photometry of gamma Pegasi. IBVS, 382 11- Jerzykiewicz, M. 1970. UBV photometry of the β Cephei type variable stars. I. γ Pegasi. Acta. Astr., 20, 931 14- Jerzykiewicz, M. 1970. UBV photometry of the beta Cephei type variable stars. II. Delta Ceti. Lowell Obs. Bull., 7, 199 (no. 155) 8- Jerzykiewicz, M. 1971. UBV photometry of the β Cephei type variable stars. III. KP Persei (HD 21803). Acta Astr., 21, 501 9- Burke, Jr., E. W., and Howard, J. T. 1972. A newly discovered variable: The Ap star HR 5153. ApJ, 178, 491 21- Stift, M. J. 1973. Photometric investigations of magnetic stars. A&A, 22, 209 Hall, J. S., Jerzykiewicz, M., and Riley, L. A. 1975. Extinction measurements for sensitive assessment of air quality. J. Air Pollution Control Assoc., 25, 1045. 9- Jerzykiewicz, M. 1975. UBV photometry of the β Cephei type variable stars. IV. V986 Ophiuchi (HD 165174). Acta Astr., 25, 81 3- Lockwood, G. W. 1975. The secular and orbital brightness variations of Titan, 1972–74. ApJ, 195, L137 7- Lockwood, G. W. 1975. Planetary brightness changes: Evidence for solar variability. Science, 190, 560 11- Millis, R. L., and Thompson, D. T. 1975. UBV photometry of the Galilean satellites. Icarus, 26, 408 13- Lockwood, G. W., and Millis, R. L. 1976. uvby light curves of Nova Cygni 1975. PASP, 88, 235 14- Lockwood, G. W. 1978. Secular brightness increases of Titan, Uranus, and Neptune 1972–1976. Icarus, 32, 413 5- Lockwood, G. W. 1978. Analysis of photometric variations of Uranus and Neptune since 1953. Icarus, 35, 79 1- Lockwood, G. W., and Thompson, D. T. 1978. A photometric test of rotation periods for Uranus and time variations of methane-band strengths. ApJ, 221, 689 1- Jerzykiewicz, M. 1979. Note on 16 Lacertae, an eclipsing system with a β Cephei primary. IBVS 1552 12- Lockwood, G. W. and Thompson, D. T. 1979. A relationship between solar activity and planetary albedos. Nature, 280, 43 10- Lockwood, G. W., Lumme, K., and Thompson, D. T. 1980. The recent photometric variability of Io. Icarus, 44, 240 6- Lockwood, G. W., Thompson, D. T., and Lumme, K. 1980. A possible detection of solar variability from photometry of Io, Europa, Callisto, and Rhea, 1976– 1979. AJ, 85, 961 6- Suess, S. T., and Lockwood, G. W. 1980. Correlated variations of planetary albedos and coincident solar- interplanetary variations. Solar Phys., 68, 393 11- Koubsky, P., Harmanec, P., Horn, J., Jerzykiewicz, M., et al. 1980. Properties and nature of Be and shell stars. 10. Light and color variations of CX Dra. Bull. Astron. Inst. Czechosl., 31, 75 25- Lockwood, G. W., Lutz, B. L., Thompson, D. T., and Warnock III, A. 1983. The albedo of Uranus. ApJ, 266, 402 10- Livingston, W., and Lockwood, G. W. 1983. Volcanic ash over Arizona in the spring of 1982: Astronomical observations. Science, 220, 300 23- Radick, R. R., Lockwood, G. W., Thompson, D. T., et al. 1983. The photometric variability of solar-type stars. III. Results from 1981–82, including parallel observations of thirty-six Hyades stars. PASP, 95, 621 45- Lockwood, G. W., Thompson, D. T., Radick, R. R., et al. 1984. The photometric variability of solar-type stars. IV. Detection of rotational modulation among Hyades stars. PASP, 96, 714 Lockwood, G. W. 1984. A statistical evaluation of the limitations of single-channel intermediate-band photoelectric stellar photometry. In Proceedings of the Workshop on Improvements to Photometry, NASA Conference Publication, 2350 12- Jerzykiewicz, M., 1984. Photoelectric photometry of the red variable, HD 157010. Acta Astr., 34, 353 1- Jerzykiewicz, M. 1984. The ellipsoidal variable ψ Orionis and the β Cephei instability region. Acta Astr., 34, 409 7- Skiff, B. A., and Lockwood, G. W. 1986. The photometric variability of solar-type stars. V. The standard stars 10 and 11 Leonis Minoris. PASP, 98, 338 27- Lockwood, G. W., Lutz, B. L., Thompson, D. T., and Bus, E. S. 1986. The albedo of Titan. ApJ, 303, 511 30- Lockwood, G. W., and Thompson, D. T. 1986. Atmospheric extinction: The ordinary and volcanically induced variations, 1972–1985. AJ, 92, 976 21- Lockwood, G. W., and Thompson, D. T. 1986. Long- term brightness variations of Neptune and the solar cycle modulation of its albedo. Science, 234, 1543 131- Radick, R. R., Thompson, D. T., Lockwood, G. W., et al. 1987. The activity, variability, and rotation of lower main-sequence Hyades stars. ApJ, 321, 459 2- Lockwood, G. W. and Thompson, D. T. 1989. Further evidence for the disputed constancy of the photometric standard 109 Virginis. PASP, 101, 705 1- Lockwood, G. W., Floyd, R. D., and Thompson, D. T. 1990. Sky glow and outdoor lighting trends since 1976 at the Lowell Observatory. PASP, 102, 481 11- Radick, R. R., Skiff, B. A., and Lockwood, G. W. 1990. The activity, variability, and rotation of lower main- sequence members of the Coma star cluster. ApJ, 353, 524 65- Radick, R. R., Lockwood, G. W., and Baliunas, S. L. 1990. Stellar activity and brightness variations: A glimpse at the Sun's history. Science, 247, 39 52- Domingue, D. L., Hapke, B. W., Lockwood, G. W., and Thompson, D. T. 1990. Europa's phase curve: Implications for surface structure. Icarus, 90, 30 1- Young, A. T., Boyd, L. J., Genet, R. M., Epand, D. H., Lockwood, G. W., Baliunas, S. L., Smith, D. P., and Donahue, R. 1990. Automated precision differential photometry. IAPPP Comm., 39, 5 57- Young, A. T., Genet, R. M., Boyd, L. J., Borucki, W. J., Lockwood, G. W., Henry, G. W., Hall, D. S., Smith, D. P., Baliunas, S. L., Donahue., R., and Epand, D. H. 1991. Precise automatic differential stellar photometry. PASP, 103, 221 16- Lockwood, G. W., Thompson, D. T., Lutz, B. L., and Howell, E. S. 1991. The brightness, albedo, and temporal variability of Neptune. ApJ, 368, 287 8- Lockwood, G. W., Thompson, D. T., Hammel, H. B., Birch, P., and Candy, M. 1991. Neptune's cloud structure in 1989: Photometric variations and correlation with ground-based images. Icarus, 90, 299 16- Lockwood, G. W., and Thompson, D. T. 1991. Solar cycle relationship clouded by Neptune's sustained brightness maximum. Nature, 349, 593 25- Gray, D. F., Baliunas, S. L., Lockwood, G. W., and Skiff, B. A. 1992. The activity cycle of σ Draconis. ApJ, 400, 681 39- Lockwood, G. W., Skiff, B. A., Baliunas, S. L., and Radick, R. R. 1992. Long-term solar brightness changes estimated from a survey of Sun-like stars. Nature, 360, 653 17- Thompson, D. T., and Lockwood, G. W. 1992. Photoelectric photometry of Europa and Callisto 1976– 1991. JGR, 97, 14761 14- Hammel, H. B., Lawson, S. L., Harrington, J., Lockwood, G. W., Thompson, D. T., and Swift, C. 1992. An atmospheric outburst on Neptune from 1986 through 1989. Icarus, 99, 363 6- Lockwood, G. W., Skiff, B. A., and Thompson, D. T. 1992. Lessons from very long-term, very high-precision photoelectric photometry. In Stellar Photometry– Current Techniques and Future Developments, C. J. Butler and I. Elliot, eds., Cambridge University Press, 99 15- Jerzykiewicz, M. 1993. UBV photometry of the beta Cephei type variable stars. V. 16 (EN) Lacertae. Acta Astr., 43, 13 29- Zhang, Q., Soon, W. H., Baliunas, S. L., Lockwood, G. W., Skiff, B. A., and Radick, R. R. 1994. A method of determining possible brightness variations of the Sun in past centuries from observations of solar-type stars. ApJ, 427, L111 2- Skiff, B. A., and Lockwood, G. W. 1994. The variability of HD 16221 = 87 Herculis between 1984 and 1993. IBVS, 4024 4- de Vaucouleurs, G., Corwin, Jr., H. G., and Skiff, B. A. 1994. Magnitudes and colors of SN 1993J comparison stars. PASP, 106, 156 11- Domingue, D. L., Lockwood, G. W., and Thompson, D. T. 1995. Surface textural properties of icy satellites: A comparison between Europa and Rhea. Icarus, 115, 228 11- Radick, R. R., Lockwood, G. W., Skiff, B. A., and Thompson, D. T. 1995. A twelve-year photometric study of lower main-sequence Hyades stars. ApJ, 452, 332 19- Gray, D. F., Baliunas, S. L., Lockwood, G. W., and Skiff, B. A. 1996. Variations of β Comae through a magnetic minimum. ApJ, 456, 365 26- Gray, D. F., Baliunas, S. L., Lockwood, G. W., and Skiff, B. A. 1996. Magnetic, photometric, temperature, and granulation variations of ξ Boo A 1984–1993. ApJ, 465, 945 4- Thompson, D. T., and Lockwood, G. W. 1996. Atmospheric transparency at Flagstaff, Arizona, 1972– 1996: Baseline and volcanic episodes compared. GRL, 23, 3349 10- Jasniewicz, G., Thevénin, F., Monier, R., and Skiff, B. A. 1996. The central star of LoTr5 revisited. A&A, 307, 200. 43- Lockwood, G. W., Skiff, B. A., and Radick, R. R. 1997. The photometric variation of sunlike stars: Observations and results, 1984–1995. ApJ, 485, 789 14- Lorenz, R. D., Lemmon, M. T., Smith, P. H., Karkoschka, E., Lockwood, G. W., and Caldwell, J. 1997. Titan's north-south asymmetry from HST and Voyager imaging: Comparison with groundbased photometry and models. Icarus, 127, 173 3- Domingue, D. L., Lockwood, G. W., and Kukala, A. E. 1998. Supplementary analysis of Io's disk-integrated solar phase curve. Icarus, 134, 113 Lockwood, G. W. 1998. Luminosity and chromospheric variations of solar analog stars. In Synoptic Solar Physics, K. S. Balasubramaniam, J. W. Harvey, and D. M. Rabin, eds., Astron. Soc. Pacific Conf. Series, vol. 140, 261 65- Radick, R. R., Lockwood, G. W., Skiff, B. A., and Baliunas, S. L. 1998. Patterns of variation among sunlike stars. ApJS, 118, 239 3- Lockwood, G. W., and Thompson, D. T. 1999. Photometric variability of Uranus, 1972–1996. Icarus, 137, 2 6- Lorenz, R. D., Lemmon, M. T., Smith, P. H., and Lockwood, G. W. 1999. Seasonal change on Titan observed with the Hubble Space Telescope WFPC2. Icarus, 142, 391 1- Kiss, L. L., and Skiff, B. A. 2001. The radial pulsation of AI Aurigae, A&A, 370, 496 2- Lockwood, G. W., and Thompson, D. T. 2002. Photometric variability of Neptune 1972–2000. Icarus, 156, 37 Radick, R. R., Lockwood, G. W., Henry, G. W., and Baliunas, S. L. 2004. The variability of sunlike stars on decadal timescales. In IAU Symposium 219, Stars and Suns: Activity, Evolution, and Planets, A. K. Dupree and A. O. Benz, eds., Astron. Soc. Pacific S-219, 264 18 - Handler, G., Shobbrock, R. R., Jerzykiewicz, M. et al. 2004. Asteroseismology of the β Cephei star ν Eridani – I. Photometric observations and pulsational frequency analysis. MNRAS, 347, 454 Jerzykiewicz, M., Handler, G., et al. 2005. Asteroseismology of the β Cephei star ν Eridani. IV. The 2003–2004 multisite photometric campaign and the combined 2002–2004 data. MNRAS, 360, 619 Handler, G., Jerzykiewicz, M., et al. 2006. Asteroseismology of the β Cephei star 12 (DD) Lacertae: photometric observations, pulsational frequency analysis and mode identification. MNRAS, 365, 327 Skiff, B. A. 1987–2000 IBVS 3009, 3906, 3919, 3919, 3967, 3968, 3971, 3972, 3973, 3974, 3982, 3983, 3984, 4053, 4054, 4055, 4056, 4057, 4058, 4065, 4603, 4889. 4890, 4891, 4892, 4893, 4894 Revised 1/26/05