T. D. Oswalt

Search results

• 2000

  Time-series photometry of the delta Scuti star XX Pyx. A. Introduction and Overview

  Handler, G., Arentoft, T., Shobbrook, R. R., Sullivan, D. J., Kleinman, S. J., Clemens, J. C., O'Donoghue, D., Wood, M. A., Crake, P., Buckley, D. A. H., Zima, W., Kanaan, A., Crause, L. A., van der Peet, A. J., Podmore, F., Habanyama, A., Oswalt, T., Lowe, G., Claver, C. F. & Chen, A. L. & 20 others, Birch, P. V., Sterken, C., Meintjes, P., Brink, J., Medupe, R., Guzik, J. A., Beach, T. E., Martinez, P., Audard, N., Leibowitz, E. M., Ibbetson, P. A., Krisciunas, K., Nitta, A., Smith, T., Giovannini, O., Raj, N. E., Ashoka, B. N., Kurtz, D. W., Watson, T. K. & O'Brien, M. S., Jan 1 2000, In: JAD. 6

  Research output: Contribution to journal › Article › peer-review

• Time-series photometry of the delta Scuti star XX Pyx G. SARA 0.9m CCD observations

  Wood, M. A., Oswalt, T. D. & Claver, C. F., Jan 1 2000, In: Journal of Astronomical Data. 6

  Research output: Contribution to journal › Article › peer-review

• 1998

  Broadband Optical Observations of BL Lacertae during the 1997 Outburst

  Webb, J. R., Freedman, I., Freedman, I., Howard, E., Ma, F., Belfort, M., Rave, H., Rave, H., Rumstay, K., Nicol, S., Nicol, S., Krick, J., Krick, J., Oswalt, T. D., Marshall, D., Marshall, D., Robishaw, T. & Robishaw, T., Jun 1 1998, In: The Astronomical Journal. 115

  Research output: Contribution to journal › Article › peer-review

• Paper Session I-D - A Plan for Small Physics Departments for the Twenty-First Century

  Patterson, J. D., Blatt, J. H., Moldwin, M. B., Oswalt, T. D. & Wood, M. A., Apr 28 1998, In: Default journal.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

• Photometry and spectroscopy of white dwarfs in wide binary systems.

  Marshall, D., Silvestri, N., Oswalt, T. & Smith, J. A., Mar 1 1998, In: International Amateur-Professional Photoelectric Photometry Communications. 71

  Research output: Contribution to journal › Article › peer-review

• Photometry of White Dwarfs in Wide Binary Systems: Progress Toward a Well-Determined White Dwarf Luminosity Function

  Davis, K., Oswalt, T. & Silvestri, N., Sep 1 1998, In: IAPPP. 73

  Research output: Contribution to journal › Article › peer-review

• Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XII. Ground-based monitoring of 3C 390.3

  Dietrich, M., Peterson, B. M., Albrecht, P., Altmann, M., Barth, A. J., Bennie, P. J., Bertram, R., Bochkarev, N. G., Bock, H., Braun, J. M., Burenkov, A., Collier, S., Fang, L. Z., Francis, O. P., Filippenko, A. V., Foltz, C. B., Gässler, W., Gaskell, C. M., Geffert, M. & Ghosh, K. K. & 38 others, Hilditch, R. W., Honeycutt, R. K., Horne, K., Huchra, J. P., Kaspi, S., Kümmel, M., Leighly, K. M., Leonard, D. C., Malkov, Y. F., Mikhailov, V., Miller, H. R., Morrill, A. C., Noble, J., O'Brien, P. T., Oswalt, T. D., Pebley, S. P., Pfeiffer, M., Pronik, V. I., Qian, B. C., Robertson, J. W., Robinson, A., Rumstay, K. S., Schmoll, J., Sergeev, S. G., Sergeeva, E. A., Shapovalova, A. I., Skillman, D. R., Snedden, S. A., Soundararajaperumal, S., Stirpe, G. M., Tao, J., Turner, G. W., Wagner, R. M., Wagner, S. J., Wei, J. Y., Wu, H., Zheng, W. & Zou, Z. L., Apr 1998, In: Astrophysical Journal, Supplement Series. 115, 2, p. 185-202 18 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

• Steps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XII. Ground-Based Monitoring of 3C 390.3

  Dietrich, M., Oswalt, T. D., Peterson, B. M., Albrecht, P., Altmann, M. & al., E., Apr 1 1998, In: The Astrophysical Journal Supplement Series. 509

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

• The 1998 SARA REU Research Experiences for Undergraduates Program

  Rumstay, K. S., Oswalt, T. D., Wood, M. A., Moldwin, M., Rassoul, H., Thursby, M. H., Castelaz, M. W., Henson, G. D., Luttermoser, D. G., Shaw, J. S., Magnani, L. A. & Webb, J. R., Mar 1 1998, In: International Amateur-Professional Photoelectric Photometry Communications. 66

  Research output: Contribution to journal › Article › peer-review

• White dwarf cosmochronometry. I. Monte Carlo simulations of proper-motionand magnitude-limited samples using schmidts 1/V_max estimator

  Wood, M. A. & Oswalt, T. D., 1998, In: Astrophysical Journal. 497, 2 PART I, p. 870-882 13 p.

  Research output: Contribution to journal › Article › peer-review

• White Dwarf Cosmochronometry. I. Monte Carlo Simulations of Proper-Motion ̶ and Magnitude-Limited Samples Using Schmidt’s 1/Vmax Estimator

  Wood, M. A. & Oswalt, T. D., Apr 20 1998, In: The Astrophysical Journal. 497

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File
• 1997

  On the Road to Determining the White Dwarf Luminosity Function: A Comparison of Two Photometric Reduction Methods

  French, R. S. & Oswalt, T. D., Jan 1 1997, In: International Amateur-Professional Photoelectric Photometry Communications. 66

  Research output: Contribution to journal › Article › peer-review

• Plan for small physics departments for the twenty first century

  Patterson, J. D., Blatt, J. H., Moldwin, M. B., Oswalt, T. D., Rassoul, H. K. & Wood, M. A., 1997, In: Space Congress Proceedings.

  Research output: Contribution to journal › Conference article › peer-review

• Preserving Access to Small Observatories Throughout the World: The Role of University Consortia and Collaboration

  Oswalt, T. D., Sep 1 1997, In: IAPPP. 69

  Research output: Contribution to journal › Article › peer-review

• 1996

  A lower limit of 9.5 Gyr on the age of the Galactic disk from the oldest white dwarf stars

  Oswalt, T. D., Smith, J. A., Wood, M. A., Hintzen, P., Hintzen, P. & Hintzen, P., Aug 1 1996, In: Nature. 382

  Research output: Contribution to journal › Article › peer-review

• Back to the Future: The SARA Observatory at Kitt Peak and the Future of Small Telescopes at National Sites

  Oswalt, T. D., Sep 1 1996, In: IAPPP. 65

  Research output: Contribution to journal › Article › peer-review

• White Dwarfs in Wide Binaries: Calibrating the Age of the Galaxy

  Ahrens, T. J., Oswalt, T. D., Smith, J. A. & Wood, M. A., Jun 1 1996, In: International Amateur-Professional Photoelectric Photometry Communications. 64

  Research output: Contribution to journal › Article › peer-review

• 1995

  A Peculiar New Variable Star Near the Wide Binary L266-18A/B

  Oswalt, T. D. & Smith, J. A., Jun 1 1995, In: Information Bulletin on Variable Stars. 4215

  Research output: Contribution to journal › Article › peer-review

• Hubble Space Telescope observations of cool white dwarf stars: Detection of new species of heavy elements

  Shipman, H. L., Barnhill, M., Barnhill, M., Provencal, J., Roby, S., Bues, I., Cordova, F., Hammond, G., Hintzen, P., Koester, D., Liebert, J., Oswalt, T., Starfield, S., Wegner, G. & Weideman, V., Mar 1 1995, In: The Astronomical Journal. 109

  Research output: Contribution to journal › Article › peer-review

• Progress Report on the SARA 0.9-m Telescope Project at Kitt Peak

  Oswalt, T. D., Rafert, J. B., Powell, H. D., Shaw, J. S., Rumstay, K. S. & Webb, J. R., Sep 1 1995, In: International Amateur-Professional Photoelectric Photometry Communications. 61

  Research output: Contribution to journal › Article › peer-review

• Willem Jacob Luyten (1899-1994)

  Oswalt, T. D., Jan 1 1995, In: IAPPP. 58

  Research output: Contribution to journal › Article › peer-review

• 1992

  Astronomy in Russia: A New Visitors' Program

  Leiker, S., Oswalt, T., Stepanyan, J. & Neizvestny, S., Jun 1 1992, In: International Amateur-Professional Photoelectric Photometry Communications. 48

  Research output: Contribution to journal › Article › peer-review

• Possible Variability of Landolt Standard SA 103-526

  Smith, J. A., Smith, B. J. & Oswalt, T. D., Mar 1 1992, In: International Amateur-Professional Photoelectric Photometry Communications. 47

  Research output: Contribution to journal › Article › peer-review

• Review of "Binary Stars: A Pictorial Atlas"

  Oswalt, T. D., Sep 1 1992

  Research output: Book/Report › Book

• Review of "The Astronomer's Sourcebook"

  Oswalt, T. D., Mar 1 1992

  Research output: Book/Report › Book

• The binary system L151-81A/B : a potential test of accretion theory

  Wood, M. A. & Oswalt, T. D., Aug 1 1992, In: The Astrophysical Journal. 394

  Research output: Contribution to journal › Article › peer-review

• The SARA KITT Peak 0.9-m Telescope Project

  Oswalt, T. D., Rafert, J. B., Wood, M. A., Castelaz, M. W., Collins, L. F., Henson, G. D., Powell, H. D., Caillault, J. P., Shaw, J. S., Magnani, L., Leake, M. A., Marks, D. W. & Rumstay, K. S., Jan 1 1992, In: ASPC. 28

  Research output: Contribution to journal › Article › peer-review

• 1991

  IAPPP: The Next Generation (Abstract)

  Oswalt, T. D., Sep 1 1991, In: International Amateur-Professional Photoelectric Photometry Communications. 45

  Research output: Contribution to journal › Article › peer-review

• Review of Two New Books on Photoelectric Photometry: "ZEN and the Art of Photoelectric Photometry" and "Workbook for Astronomical Photoelectric Photometry"

  Oswalt, T. D., Jun 1 1991

  Research output: Book/Report › Book

• The physical properties of double degenerate common proper motion binaries

  Sión, E. M., Oswalt, T. D., Liebert, J. W. & Hintzen, P. M. N., Apr 1 1991, In: The Astronomical Journal. 101

  Research output: Contribution to journal › Article › peer-review

• The Sanyo Rechargeable Flashlight: New Life for an Old Friend

  Oswalt, T. D., Dec 1 1991, In: International Amateur-Professional Photoelectric Photometry Communications. 46

  Research output: Contribution to journal › Article › peer-review

• UBV Photometry of SAO 138613

  Smith, J., Smith, B., Oswalt, T. & Strother, E., Dec 1 1991, In: IAPPP. 46

  Research output: Contribution to journal › Article › peer-review

• UV observations of the cool DBQA5 white dwarf LDS 678A: Limits on the atmospheric composition, pressure shift, and gravitational redshift derived from C I 2479

  Oswalt, T. D., Sion, E. M., Hammond, G., Vauclair, G., Liebert, J. W., Wegner, G., Koester, D. & Marcum, P. M., Feb 1991, In: Astronomical Journal. 101, 2, p. 583-586 4 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access
• 1990

  The CI pressure shift and gravitational redshift of the cool DBQA5 white dwarf LDS678A

  Sion, E. M., Vauclair, G., Oswalt, T. D., Hammond, G., Liebert, J., Koester, D., Wegner, G. & Marcum, P., Aug 1 1990, In: ESA, Evolution in Astrophysics: IUE Astronomy in the Era of New Space Missions. 310

  Research output: Contribution to journal › Article › peer-review

• The Florida Institute of Technology Automatic Photometric Telescopes

  Rafert, J. B., Oswalt, T. D., Freel, J., Leko, J. J., Mutchler, M., Proffit, J., Schufelt, S., Smith, J. A., Suárez, J. & Wells, J., Dec 1 1990, In: International Amateur-Professional Photoelectric Photometry Communications. 42

  Research output: Contribution to journal › Article › peer-review

• The I. A. P. P. P. Enters Its Second Decade: A Paper Presented at the 1990 Boston Meeting of the A. S. P.

  Oswalt, T. D., Hall, D. S. & Reisenweber, R. C., Dec 1 1990, In: International Amateur-Professional Photoelectric Photometry Communications. 42

  Research output: Contribution to journal › Article › peer-review

• 1989

  REFLEX! A Program to Evaluate the Reaction Times of Visual Occultation Observers

  Oswalt, T. D., Jun 1 1989, In: International Amateur-Professional Photoelectric Photometry Communications. 36

  Research output: Contribution to journal › Article › peer-review

• Three very cool degenerate stars in Luyten common proper motion binaries - Implications for the age of the galactic disk

  Hintzen, P., Oswalt, T. D., Liebert, J. & Sion, E. M., Nov 1 1989, In: The Astrophysical Journal. 346

  Research output: Contribution to journal › Article › peer-review
• 1988

  Identifications and limited spectroscopy for Luyten common proper motion stars with probable white dwarf components. I - Pair brighter than 17th magnitude

  Oswalt, T. D., Hintzen, P. M. & Luyten, W. J., Apr 1 1988, In: Astrophysical Journal Supplement Series. 66

  Research output: Contribution to journal › Article › peer-review

• L151-81A/B: A Unique White Dwarf Binary with DB and DA Components

  Oswalt, T. D., Hintzen, P. M., Liebert, J. W. & Sion, E. M., Oct 15 1988, In: The Astrophysical Journal. 333

  Research output: Contribution to journal › Article › peer-review

• On the frequency of helium-rich degenerates in wide binaries

  Sion, E. M. & Oswalt, T. D., Mar 1 1988, In: The Astrophysical Journal. 326

  Research output: Contribution to journal › Article › peer-review
• 1987

  The size, shape, density, and Albedo of Ceres from its occultation of BD+8°471

  Millis, R. L., Wasserman, L. H., Franz, O. G., Nye, R. A., Oliver, R. C., Kreidl, T. J., Jones, S. E., Hubbard, W., Lebofsky, L., Goff, R., Marcialis, R., Sykes, M., Frecker, J., Hunten, D., Zellner, B., Reitsema, H., Schneider, G., Dunham, E., Klavetter, J. & Meech, K. & 22 others, Oswalt, T., Rafert, J., Strother, E., Smith, J., Povenmire, H., Jones, B., Kornbluh, D., Reed, L., Izor, K., A'Hearn, M. F., Schnurr, R., Osborn, W., Parker, D., Douglas, W. T., Beish, J. D., Klemola, A. R., Rios, M., Sanchez, A., Piironen, J., Mooney, M., Ireland, R. S. & Leibow, D., Dec 1 1987, In: Icarus. 72

  Research output: Contribution to journal › Article › peer-review
• 1986

  MicroComputer Reduction of Digital Photometric Occultation Data

  Oswalt, T. D., Mar 1 1986, In: International Amateur-Professional Photoelectric Photometry Communications. 23

  Research output: Contribution to journal › Article › peer-review

• 1985

  A Portable Digital Data Acquisition System for Asteroid Occultation Photometry

  Oswalt, T. D. & Rafert, J. B., Jun 1 1985, In: IAPPP. 20

  Research output: Contribution to journal › Article › peer-review

• 1984

  MRK 320 : a hot DA white dwarf.

  Oswalt, T. D., Peterson, B. M. & Foltz, C. B., Mar 1 1984, In: The Astronomical Journal. 89

  Research output: Contribution to journal › Article › peer-review