Peter Usher

Peter Usher

Pennsylvania State University - University Park / United States
Natural Sciences / Physics
AD Scientific Index ID: 890807
person_outline Peter Usher's MOST POPULAR ARTICLES
1-) On the optical search for the X-ray sources CYG X-1 and CYG X-2 Astrophysical Journal, vol. 148, p. L129 148, L129, 1967
2-) A medium-bright quasar sample-New quasar surface densities in the magnitude range from 16.4 to 17.65 for B Astrophysical Journal, Part 2-Letters to the Editor (ISSN 0004-637X), vol …, 1984
3-) Variable quasi-stellar objects. I-Photometry and completeness of faint blue objects in the Sandage-Luyten survey field 8h48m,+ 18 deg Astrophysical Journal, Part 1, vol. 222, May 15, 1978, p. 40-53. 222, 40-53, 1978
4-) Faint blue objects at high galactic latitude. I-Palomar Schmidt field centered on selected area 57 Astrophysical Journal Supplement Series, vol. 46, June 1981, p. 117-139. 46 …, 1981
5-) The generalized Riccati transformation as a simple alternative to invariant imbedding Astrophysical Journal, vol. 146, p. 871 146, 871, 1966