R-SAW-7/79-33 DOCUMENTATION FOR THE MACHINE-READABLE VERSION OF STEPHENSON'S GENERAL CATALOGUE OF S STARS July 1979 Contract NAS 5-25369 Theresa A. Nagy Prepared for: National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland 2077l Prepared by: Systems and Applied Sciences Corporation 6811 Kenilworth Avenue Riverdale, Maryland 20840 TABLE OF CONTENTS Section 1 - Introduction................................1-1 Section 2 - File Contents...............................2-1 Section 3 - File Characteristics........................3-1 Section 4 - Remarks and Modifications...................4-1 LIST OF TABLES Table 1 File Contents........................................2-1 2 File Characteristics.................................3-1 SECTION 1 - INTRODUCTION In recent years there has been a trend away from publishing catalogues in book form to preparing catalogues by computer and distributing them on magnetic tape, with appearance in book form a secondary occurrence. This memo is the result of the development of the documentation for the machine-readable version of the catalogue and includes the basic information given in the original preface of the published catalogue. This memo should be distributed along with any copy of the machine-readable version of the catalogue. 1-1 SECTION 2 - FILE CONTENTS A byte-by-byte description of the contents of the catalogue is given in Table 1. The information in the "Description" column is derived mainly from the published version of the catalogue whenever possible. The "Suggested Format" column is for FORTRAN-formatted reads. Table 1. File Contents. Stephenson's General Catalogue of S Stars BYTES DESCRIPTION FORMAT 1-4 Catalogue Number I4 5 Blank 1X 6-31 Equatorial Coordinates (Epoch 1900.0) Right Ascension 6-7 Hours I2 8 Blank IX 9-12 Minutes F4.1 13 Blank IX 14-17 Seconds F4.1 18 Blank IX Declination 19 Sign A1 20-21 Degrees I2 22 Blank 1X 23-26 Arc Minutes F4.1 27 Blank 1X 28-29 Arc Seconds I2 30-3l Colon(s) * or Blank A2 32 Blank 1X 33-49 Magnitudes 33-37 Photographic Magnitude, F5.2 Sometimes B 38 Colon * or Blank A1 39-43 Visual Magnitude, sometimes F5.2 red-biased *Implies that precision is probably less than that quoted, but probably not by a whole decimal place. 2-1 BYTES DESCRIPTION FORMAT 44 Colon * or Blank A1 45-48 Infrared Magnitude F4.1 49 Colon * or Blank A1 50 Blank 1X 51-80 Spectrum, either: 30A1 a. Spectral Type based on Keenan System. b. Definitive sources that classified the S Star. Sources for quoted class- ifications are in parenthesis. Lists of source codes and references are included later. Other semi-quantitative information contained here is: i) SWK means a weak S Star, i. e. ZrO is rather weak, comes only from Cleveland material. ii) MS - When assigned from objective prism plates, means that the ZrO is both weak and also very much weaker than TiO. iii)S! means that the ZrO has outstanding strength, both absolutely and with respect to TiO. iv) For a summary of nomenclature on stars called SC and C-S, see Stephenson, C. B., 1973, Astrophys. J., 186, 589. v) R means unusually Red. vi) Colon indicates uncertainty. 81-170 Designations - This gives the star's occur- 90A1 rence in various finding lists, including un- published ones. Further spectral types on the Keenan system, in addition to anything cited under Spectrum, will be given here in parentheses following the source abbreviation, unless the star is a variable star with numerous classifications at different phases; the latter infor- mation is sometimes indicated under Remarks. Other semi-quantitative classifications are similarly quoted here, if available and if something is already listed under Spectrum. Classifications merely of type S are not explicitly cited in parentheses unless one or more non-S, Sp, or S: classifications are also cited, and not always even then (in some references a classification of S may be assumed); *Implies that precision is probably less than that quoted, but probably not by a whole decimal place. 2-2 BYTES DESCRIPTION FORMAT the rule is, if the finding list is one of spectral types and no type is cited in this catalogue for a quoted source, it is to be assumed that the source called the star an S star. If a given source is already quoted for type under Spectrum, that classification will not be repeated under Designations, whence the types cited under Designations are always additional to those given under Spectrum; but a source cited under Spectrum may be repeated under Designation in order to indicate independent discovery. A source cited under Spectrum but not under Designation means that the star was specially examined in order to determine its spectral type, but not routinely picked up in an objective - prism survey. Finding lists with no concentration on S stars: The chief published designations cited are the HR number, labelled HR; the HD number, usually given first, and quoted as a number without other alphabetic characters; the BD or CoD numbers in the usual notation, but without alphabetic characters; and the GCVS (General Catalogue of Variable Stars or CSV (Catalogue of Stars Suspected of Being Variable) designation. Spectral types are not quoted from the GCVS unless they appear to be independent of the rest of the data and are of unusual interest. CoD numbers are usually not given if the CoD magnitude is fainter than 9.5, and CPD numbers are never given. 171-174 Catalogue Number (repeated) I4 175 Blank 1X 176-186 Galactic Coordinates (degrees) 176-180 Longitude F5.1 181 Blank 1X 182-186 Latitude F5.1 187 Blank 1X 188-200 Notes 13A1 * - An asterisk indicates that the record given equates at least two data in contradiction to one or more of the papers cited; for 2-3 BYTES DESCRIPTION FORMAT example, the record may be citing two identifications of the star as an S star, with the later paper calling the star new; or Stephenson may be assigning a BD number when the discoverer did not; and so on. Less often, the asterisk means that Stephenson omitted an erroneous published identification. In all cases the single asterisk means that his conclusion has been made solely on the basis of published information, i. e. without examining an objective prism plate in order to prove it. ** - A double asterisk means the same as a single one, except that Stephenson has looked at his own plate material with the identification problem in mind. + - A plus calls attention to an identification of an S star with a GCVS star, being newly made in here on the basis of Stephenson's comparing an objective-prism plate with a published iden- tification chart for the variable. R - An R means that further remarks will be found in the Remarks in the original publication. Reference codes also appear Coding of sources: Whenever a number appears separated from the initial part of the designation by a blank space, the number is one (usually published) assigned by the corresponding discoverer, hyphens if any separating table numbers from numbers within tables. Numbers following alphabetic characteristics and not preceded by a blank space are part of the abbreviation. The abbreviations mean the following: BidK Bidelman and Krumenaker (1972). Bidun Bidelman, unpublished, usually from a slit spectrogram. BidMac Bidelman and MacConnell (1973). BM Blanco and Munch (1955). BSD Bergedorfer Spektral-Durchmusterung (Schwassmann and van Rhijn 1935). BlancN Blanco and Nassau (1957). D Lee et al (1943, 1944, 1947). The present catalogue has not been fully compared with the 44,000 stars of the D lists, except for the stars of the latter called S, Sp, or S?. 2-4 De Dean (1972). Dol61 Dolidze (1961). Dol62a " (1962a). Dol62b " (1962b). Dol65 " (1965). Dol68 " (1968). Dol70a " (1970a). Dol70b " (1970b). Dol70c " (1970c). Dol71 " (1971). In most of the lists of this series the coordinates seem to be uncertain by 5 - 10 arcmin. DolJim Dolidze and Jimsheleishvili (1966). Harw Harwood (1962). Hen60 Henize (1960). Henun Henize, unpublished. The star numbers are from a list dated 1965. Hetzler Hetzler (1937). Krum Krumenaker (1975). MacCon MacConnell (1967). MacRae MacRae (1952). MSB Merrill, Sanford, and Burwell (1933, 1942). Without a number, unpublished. Nass54 Nassau, Blanco, and Morgan (1954). NassCam Nassau and Cameron (1956). NassSte Nassau and Stephenson (1961). Nass64 Nassau, Stephenson, and Caprioli (1964). Perr59 Perraud (1959). Perr61 Perraud (1961). Pes Pesch, unpublished. Rust Rust (1938). Sndlk Sanduleak, unpublished. Ste Stephenson, unpublished. Ste73 Stephenson (1973). SteTer Stephenson and Terrill (1967). Sto Stock and Wroblewski (1972). S-WS Two Case lists of S stars: Nassau, Blanco, and Morgan (1954); Blanco and Nassau (1957). The68 The (1968). VB Blanco (unpublished). Vys Vyssotsk (1942), Janssen and Vyssotcky (1943), Vyssotsky and Miller (1946), always with a star number. Without a number, Vyssotsky unpublished. Wray Wray (1966). Numbers are from his combined table of carbon and S stars. His type SE means S with H alpha emission. Coding for references, both as used under Remarks and under Spectrum, are as follows, omitting abbreviations that are also found under Designations. Bid65 Bidelman (1965). Merr Merrill (1940). CatchF Catchpole and Feast (1971). Sanf41 Sanford (1941). F66 Feast (1966). Sanf49 Sanford (1949). K Keenan (1954). Sharp Sharpless (1964). K66 Keenan (1966). WPB Bidelman (1954a). 2-5 REFERENCES 1. Bidelman, W. P., 1950, Astrophys. J., 112, 219. 2. _______. 1954a, Astrophys. J. Suppl., 1, 175. 3. _______. 1954b, Mem. Soc. Roy. Sci. Liege, 4th Ser., 14, 402. 4. _______. 1965, Publs. Astron. Soc. Pacific, 77, 392. 5. Bidelman, W. P., and Krumenaker, L. E., 1972, Publs. Astron. Soc. Pacific, 84, 685. 6. Bidelman, W. P., and MacConnell, D. J., 1973, Astron. J, 78, 687. 7. Blanco, V. M., 1965, Stars and Stellar Systems, Vol. V (ed. A. Blaauw and M. Schmidt) Chap. 12; University of Chicago Press, Chicago. 8. Blanco, V. M., and Munch, L., 1955, Bol. Obs. Tonantzintla y Tacubaya, No. 12. 9. Blanco, V. M., and Nassau, J. J., 1957, Astrophys. J., 125, 408. 10. Catchpole, R. M., and Feast, M. W., 1971, Monthly Notices Roy. Astron. Soc., 154, 197. 11. Dean, C. A., 1972, unpublished Ph.D. thesis, Univ. of Texas. 12. Dolidze, M. V., 1961, Astron. Circ., No. 224, 15. 13. _______. 1962a, Ibid., No. 228, 13. 14. _______. 1962b, Ibid., No. 230, 14. 15. _______. 1965, Ibid., No. 347, 4. 16. _______. 1968, Ibid., No. 464, 5. 17. _______. 1970a, Ibid., No. 507, 6. 18. _______. 1970b, Ibid., No. 552, 8. 19. _______. 1970c, Ibid., No. 596, 4. 20. _______. 1971, Ibid., No. 632, 7. 21. Dolidze, M. V., and Jimsheleishvili, G. N., 1966, Astron. Circ., No. 387, 7. 2-6 REFERENCES (continued) 22. Feast, M. W., 1966, Monthly Notices Roy. Astron. Soc., 132, 495. 23. Greene, A. E., 1971, unpublished Ph.D. thesis, Ohio State Univ. 24. Harwood, M., 1962, Ann. Leiden Obs., 21, 387. 25. Henize, K. G., 1960, Astron. J., 65, 491. 26. Hetzler, C., 1937, Astrophys J., 86, 509. 27. Janssen, E. M., and Vyssotsky, A. N., 1943, Publs. Astron. Soc. Pacific, 55, 245. 28. Keenan, P. C., 1954, Astrophys J., 120, 484. 29. _______. 1966, Astrophys. J. Suppl., 13, 333. 30. Kron, G. E., and Smith, J. L., 1951, Astrophys. J., 113, 324. 31. Krumenaker, L. E., 1975, Publs. Astron. Soc. Pacific, 87, 185. 32. Lee, 0. J., Baldwin, R. B., Hamlin, D. W., and Kinnaird, R. F. 1943, Annals Dearborn Obs., 5, pt. 1A. 33. Lee, 0. J., and Barlett, T. J., 1944, Annals Dearborn Obs., 5, pt. 1B. 34. Lee, 0. J., Gore, G. D., and Bartlett, T. J., 1947, Annals Dearborn Obs., 5, pt. 1C. 35. MacConnell, D. J., 1967, Publs. Astron. Soc. Pacific, 79, 266. 36. MacRae, D. A., 1952, Astrophys. J., 116, 592. 37. Merrill, P. W., 1940, The Spectra of Long-Period Variables; The Uøniversity of Chicago Press, Chicago. 38. Merrill, P. W., Sanford, R. F., and Burwell, C. G., 1933, Publs. Astron. Soc. Pacific, 45, 306. 39. ________. 1942, Ibid, 54, 107. 40. Nassau, J. J., Blanco, V. M., and Morgan, W. W., 1954, Astrophys. J., 120, 478. 41. Nassau, J. J., and Cameron D. M., 1956, Astrophys. J., 124, 346. 42. Nassau, J. J., and Stephenson, C. B., 1961, Astrophys. J., 133, 920. 2-7 REFERENCES (continued) 43. Nassau, J. J., Stephenson, C. B.,. and Caprioli, G., 1964, Astrophys. J., 139, 864. 44. Neckel, H., 1958, Astrophys. J., 128, 510. 45. Neugebauer, G., and Leighton, R. B., 1969, NASA Special Publ., No. 3047. 46. Perraud, H., 1959, J. Observateurs, 42, 142. 47. _______. 1961, Ibid., 44, 149. 48. Rust, C. F., 1938, Astrophys. J., 88, 525. 49. Sanford, R. F., 1941, Publs. Astron. Soc. Pacific, 53, 290. 50. _______. 1949, Ibid., 61, 43. 51. Schwassmann, A., and van Rhijn, P. J., 1935-1953, Bergedorfer Spektral-Durchmusterug; Hamburger Sternwarte, Bergedorf. 52. Sharpless, S., 1964, IAU Symp. No. 24, p. 345; Acamedic Press, N.Y. 53. Stephenson, C. B., 1973, Astrophys. J., 186, 589. 54. Stephenson, C B., and Sanduleak, N., 1971, Publs. Warner & Swasey Obs., 1, No. 1. 55. Stephenson, C. B., and Terrill, C. L., 1967, Astrophys. J., 147, 148. 56. Stock, J., Nassau, J. J., and Stephenson, C. B., 1960, Luminous Stars in the Northern Milky Way II; Hamburg and Warner and Swasey Observatories, Hamburg-Bergedorf. 57. Stock, J., and Wroblewski, W., 1972, Publs. Dept. Astron. Univ. Chile, 2, No. 3. 58. The, P. S., 1968, Publs. Astron. Soc. Pacific, 80, 104. 59. Vyssotsky, A. N., 1942, Publs. Astron. Soc. Pacific, 54, 153. 60. Vyssotsky, A. N., and Miller, W. J., 1946, Publs. Astron. Soc. Pacific, 58, 53. 61. Wray, J. D., 1966, Unpublished Ph. D. thesis, Northwestern University. 2-8 SECTION 3 - FILE CHARACTERISTICS The information contained in this section is sufficient for the user to read the machine-readable version of the catalogue. The statistics of the contents of the entire file are given in Table 2. Table 2. File Characteristics STEPHENSON'S GENERAL CATALOGUE OF S STARS CATALOGUE..............................................................SS NUMBER OF FILES........................................................1 LOGICAL RECORD LENGTH (BYTES)..........................................200 RECORD FORMAT..........................................................Fixed TOTAL NUMBER OF LOGICAL RECORDS........................................741 3-1 SECTION 4 - REMARKS AND MODIFICATIONS The machine-readable version of the "Stephenson Catalogue of S Stars" was keypunched at Goddard Space Flight Center, NASA. It was keypunched in two parts. The first part contained the record number, Equatorial Coordinates, Magnitudes, and Spectrum. There were 741 cards, one per entry. The second part contained record number, Designations, Galactic Coordinates, and Notes. There were 803 cards, one, two or three per entry. Extra cards were required for long designations, maximum of 89 bytes for one. A 200 byte record was generated when combining the two parts of the catalogue, the following changes were made to the initial keypunching: 1. The Equatorial Coordinate units and magnitude(s) units were aligned to compensate for the varying accuracy given in the catalogue. 2. The continuation of second and third cards for the Designation were combined into one 90 byte unit. 3. The record number was included twice to allow for ease in reading on microfilm and printout. The following modifications were made to fit the catalogue to machine-readable form: 1. Daggars were coded as a plus (+) In the notes. 2. 40^1 = 401 (superscripts = units digit) 3. Pi^1 = 161 ( alpha=01, beta 0.2, pi= 16, ... omega= 24) Reference for the published version of the Catalogue of S Stars: Stephenson, C. B., Publications of the Warner and Swasey Observatory, Case Western Reserve University, Vol. 2, No. 2, (1976). 4-1