SSD-T-5069-0009-81 DOCUMENTATION FOR THE MACHINE-READABLE VERSION OF THE ULTRAVIOLET BRIGHT STAR SPECTROPHOTOMETRIC CATALOGUE May 1981 Contract NAS 5-26490 Theresa A. Nagy and Robert S. Hill Revised by: Susan E. Gessner Lee E. Brotzman December 1990 Prepared for: National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland 20771 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 2-1 File Contents........................................2-1 3-1 File Characteristics.................................3-1 ii 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 2-1. 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 2-1. File Contents (1 of 8) ULTRAVIOLET BRIGHT STAR SPECTROPHOTOMETRIC CATALOGUE Suggested Bytes Description Format 1-4 Sequential number (1 - 1356) of UV Bright I4 Stars. 5-10 Henry Draper (HD) identification I6 11-13 Number of spectra - there are a total of I3 5330 individual observations for the 1356 stars. The resultant data are an average of the individual observations. 14-379 Flux in units of 10^-10 erg/(cm^2 s^1 A^1) is given for each of 61 wavelengths from lamda=1360 to 2540 in 20 angstrom steps and at lamda=2740. wavelength (A) 14-19 1360 F6.2 20-25 1380 F6.2 26-31 1400 F6.2 32-37 1420 F6.2 38-43 1440 F6.2 44-49 1460 F6.2 50-55 1480 F6.2 56-61 1500 F6.2 62-67 1520 F6.2 68-73 1540 F6.2 74-79 1560 F6.2 80-85 1580 F6.2 86-91 1600 F6.2 92-97 1620 F6.2 98-103 1640 F6.2 104-109 1660 F6.2 110-115 1680 F6.2 116-121 1700 F6.2 122-127 1720 F6.2 128-133 1740 F6.2 134-139 1760 F6.2 140-145 1780 F6.2 146-151 1800 F6.2 152-157 1820 F6.2 2-1 Table 2-1. File Contents (2 of 8) Suggested Bytes Description Format 158-163 1840 F6.2 164-169 1860 F6.2 170-175 1880 F6.2 176-181 1900 F6.2 182-187 1920 F6.2 188-193 1940 F6.2 194-199 1960 F6.2 200-205 1980 F6.2 206-211 2000 F6.2 212-217 2020 F6.2 218-223 2040 F6.2 224-229 2060 F6.2 230-235 2080 F6.2 236-241 2100 F6.2 242-247 2120 F6.2 248-253 2140 F6.2 254-259 2160 F6.2 260-265 2180 F6.2 266-271 2200 F6.2 272-277 2220 F6.2 278-283 2240 F6.2 284-289 2260 F6.2 290-295 2280 F6.2 296-301 2300 F6.2 302-307 2320 F6.2 308-313 2340 F6.2 314-319 2360 F6.2 320-325 2380 F6.2 326-331 2400 F6.2 332-337 2420 F6.2 338-343 2440 F6.2 344-349 2460 F6.2 350-355 2480 F6.2 356-361 2500 F6.2 362-367 2520 F6.2 368-373 2540 F6.2 374-379 2740 F6.2 380-562 Root-mean-square deviation of the observations used to compute the mean flux given as a percentage: _ _ 2 _ 1/2 100 | (N_i - N) | S(lamda)= --- | -------------- | _ | n - 1 | N | | - - where N_i is the individual flux at wavelength lamda 2-2 Table 2-1. File Contents (3 of 8) Suggested Bytes Description Format _ N is the average flux at wavelength lamda n is the number of averaged observations (cf. bytes 11-13) These values are also for each of the observa- tion wavelengths. wavelength (A) 380-382 1360 I3 383-385 1380 I3 386-388 1400 I3 389-391 1420 I3 392-394 1440 I3 395-397 1460 I3 398-400 1480 I3 401-403 1500 I3 404-406 1520 I3 407-409 1540 I3 410-412 1560 I3 413-415 1580 I3 416-418 1600 I3 419-421 1620 I3 422-424 1640 I3 425-427 1660 I3 428-430 1680 I3 431-433 1700 I3 434-436 1720 I3 437-439 1740 I3 440-442 1760 I3 443-445 1780 I3 446-448 1800 I3 449-451 1820 I3 452-454 1840 I3 455-457 1860 I3 458-460 1880 I3 461-463 1900 I3 464-466 1920 I3 467-469 1940 I3 470-472 1960 I3 473-475 1980 I3 476-478 2000 I3 479-481 2020 I3 482-484 2040 I3 485-487 2060 I3 2-3 Table 2-1. File Contents (4 of 8) Suggested Bytes Description Format 488-490 2080 I3 491-493 2100 I3 494-496 2120 I3 497-499 2140 I3 500-502 2160 I3 503-505 2180 I3 506-508 2200 I3 509-511 2220 I3 512-514 2240 I3 515-517 2260 I3 518-520 2280 I3 521-523 2300 I3 524-526 2320 I3 527-529 2340 I3 530-532 2360 I3 533-535 2380 I3 536-538 2400 I3 539-541 2420 I3 542-544 2440 I3 545-547 2460 I3 548-550 2480 I3 551-553 2500 I3 554-556 2520 I3 557-559 2540 I3 560-562 2740 I3 563-568 Henry Draper (HD) identification number from I6 the Catalogue of Bright Stars (Reference 4, cf. bytes 649-659). 569-572 Additional HD identifications preceded by a 4A1 slash ("/"): e.g. #29 gives HD as 5789/8 which means 5789 or 5788 so the "/8" will appear in these bytes left justified. There are 15 cases of multiple HD identifications: Number HDs 29 5789/8 53 12447/6 71 18622/3 75 19134/5 114 27071/2 342 45725/6/7 529 61555/6 633 74560/35 774 120709/10 830 139891/2 848 142629/30 873 147933/4 2-4 Table 2-1. File Contents (5 of 8) Suggested Bytes Description Format 889 150135/6 925 157778/9 1004 170867/8 573-585 Other name 573-575 Flamsteed number prefix (e.g. 10 in I3 #1, 10 Cas) 576-577 Variable star letter designation 2A1 left justified (e.g. #8, AO in AO Cas); there are two cases of star names with a lower case followed by a constellation abbreviation (#665, a Car; and #915, 68 u Her) which have been entered in the machine-readable version as A CAR and 68 U HER respectively, i.e. there is no indication that these are lower case letters. 578-57 Greek letter coded as: I2 alpha=01 .... omega = 24 580-582 Greek 1etter superscript left 3A1 justified (e.g. 1 in #47, gamma^1 Ari and 1/2 in #71, theta^1/2 Eri) 583-585 Constellation abbreviation 3A1 (e.g.: #1, CAS; #5 PEG) 586 Blank 1X 587-593 Right ascension (Epoch 2000.0) Equatorial positions are from references (cf. bytes 649-659) #1, #4 or computed from #8 respectively in that order of preference. 587-588 hours I2 589 blank 1X 590-593 minutes F4.1 594 Blank 1X 2-5 Table 2-1. File Contents (6 of 8) Suggested Bytes Description Format 595-600 Declination (Epoch 2000.0) (cf. note for right ascension, bytes 587-593). 595 sign A1 596-597 degrees I2 598 blank 1X 599-600 arc minutes I2 601 Blank 1X 602-606 Spectral type (left justified). Sources of spectral 5A1 types and luminosity classes (cf. bytes 608-619) are from references (cf.bytes 649-659) #1, #3, #2, #9, #10, #4, #8, #11 or #16 respectively in that order of preference. 607 Blank 1X 608-619 Luminosity class information - all information 12A1 is given in upper case letters (cf. sources as given in note to bytes 602-606). 620-624 Visual magnitude, the V photoelectric magnitude F5.2 from the UBV system. The order of selection of the photoelectric data is the same as for the spectral type (cf. bytes 602-606) and luminosity class (cf. bytes 608-619) data. 625 A "V" in this byte indicates that the star A1 is confirmed to be variable from references (cf. bytes 649-659)#12, #13, or #14 respectively in that order of preference, otherwise this byte is blank. 626 An asterisk in this byte implies that the A1 data were in italics in the published cata- logue which means that the photoelectric data are from the HR (reference 4), HD (reference 11), or SAO (reference 8) catalogues. 627-631 Photoelectric B-V color in the UBV system. F5.2 Note: If no value was given in the published catalogue a value of 9.99 is given here. 632 Blank 1X 633-637 Photoelectric U-B color in the UBV system. F5.2 Same note as for bytes 627-631. 2-6 Table 2-1. File Contents (7 of 8) Suggested Bytes Description Format 638 Blank 1X 639-642 The B-V color excess [E(B-V)]: F4.2 E(B-V) = (B-V) - (B-V)_o where (B-V)_o is given in reference 15 (cf. bytes 649-659) (cf. note for byte 643 and for bytes 627-631). 643 An asterisk ("*") in this byte means that the A1 value of the color excess [E(B-V)] was in italics in the published catalogue. This was the case when an extrapolation of the data from the Fitzgerald source was required (cf. bytes 639-642). 644 Blank 1X 645-647 Projected rotational velocity (v sin i) from I3 references (cf. bytes 649-659) #5, #6, or #7 respectively in that order of preference. If no value was given in the published catalogue, a value of 999 is given here. 648 Blank 1X 649-659 References for source material separated by 11A1 commas coded as follows: 1 = Kennedy, P.M. and Buscombe, W. MK Spectral Classifications (Evanston 1974). 2 = Jaschek, C., Hernandez, E., Sierra, A., Gerhardt, A., 1972. Catalogue of Stars Observed Photoelectrically, Astronomical Observatory La Plata, Serie Astronomica, Tome XXXVIII. 3 = Blanco, V.M., Demers, S., Douglass, G.G., FitzGera1d, M.P., 1968. Publ. U.S. Naval Obs. 21, Second series. 4 = Hoffleit, D. 1964. Yale Catalogue of Bright Stars. 3rd Edition. Yale Univ. Obs., New Haven, Conn. 5 = Uesugi, A., Fukuda I., 1970. Contrib. Inst. of Astrophys. and Kwasan Obs., Univ. of Kyoto, No. 189. 2-7 Table 2-1. File Contents (8 of 8) Suggested Bytes Description Format 6 = Boyarchuk, A.A., Kopylov, I.M., 1964. Izv. Krymsk, Astrofiz. Obs. 31, 44. 7 = Bernacca, P.L., 1973. Contrib. Obs. Astrofisico di Padova in Asiago, No. 294. 8 = Smithsonian Astrophys. Obs. Star Catalogue 1966, Smithsonian Astrophys. Obs., Cambridge, Mass., Smith Publ. 4652. 9 = Houk, N., Cowley, A.P., 1975. University of Michigan Cat. of Two-Dimensional spectral types for the HD stars, Vol. I, Univ. of Michigan, Ann Arbor, Mich. 10 = Mermilliod, J.C., 1974. Catalogue of UBV photoelectric photometry. 11 = Henry Draper Catalogue, 1918 to 1924. Annals of the Astron. Obs. of Harvard College, 91 to 99. 12 = Kukarkin, B.V., Kholopov, P.N., Efremov, Yu. N., Kukarkina, N.P., Kurochkin, N.E., Medvedeva, G.I., Perova, N.B., Fedorovich, V.P., Frolov, M.S., 1969. General Cat. of Variable Stars, 3rd Ed., Moscow and Kukarkin, B.V., Kholopov, P.N., Efremov, Yu N., Kukarkina, N.P., Kurochkin, N.E., Medvedeva, G.I., Perova, N.E., Pskovsky, Yu. P., Fedorovich, V.P., Frolov, M.S., 1974. Second Suppl. to the 3rd Ed. of the General Cat. of Var. Stars, Moscow. 13 = Feinstein, A., 1968. zeitschrift fur Astrophys. 8, 29 and Feinstein, A., 1975. P.A.S.P., 87, 603. 14 = Baglin, A., Breger, M., Chevalier, C., Hauck, B., Le Contel, J.M., Sareyan, J.P., Valtier, J.C., 1973. Astron. and Astrophys. Suppl. 23, 221. 15 = FitzGerald, M.P., 1970. Astron. and Astrophys. 4, 234. 16 = Goy, G. 1973. Astron. and Astrophys. 12, 277. 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 3-1. Tab1e 3-1. File Characteristics ULTRAVIOLET BRIGHT STAR SPECTROPHOTOMETRIC CATALOGUE CATALOGUE......................................................TDBS NUMBER OF FILES................................................1 LOGICAL RECORD LENGTH (BYTES)..................................659 RECORD FORMAT..................................................Fixed TOTAL NUMBER OF LOGICAL RECORDS................................1356 3-1 SECTION 4 - REMARKS AND MODIFICATIONS The machine-readable version of the Ultraviolet Bright Star Spectrophotometric Catalogue was received from the Centre de Donnees Stellaires (CDS in Strasbourg, France) in l979. The published catalogue consists of two major data files: (1) the Primary Data File which contains the other major astrophysical quantities for the 1356 stars contained in this catalogue and (2) the Catalogue which is the major portion of the catalogue (fluxes at 61 wavelengths in the range lamda = 1360 to 2740). This catalogue is a compilation of absolute spectrophotometric data obtained with the Sky Survey Telescope (S2/68) on the European Astronomical Satellite TD-l. The details on the calibration procedures are described in detail in the introduction to the catalogue. The magnetic tape as received from the CDS had a logical record length of 989 bytes and a physical record length of 7912 bytes (8 records per physical block). The information from the primary data file was keypunched, proofread and added to the magnetic tape at NASA/GSFC. Each record had the 61 wavelengths (cf. bytes 14-379 of Table 2-1) explicitly. These 244 bytes were removed since they are easily reproduced: i.e. lamdba =l360 to 2540 in 20 angstrom steps and lamda =2740. The flux was initially given at each of the 61 wavelengths in a E9.3 format in units of erg/(cm^2 s^1 A^1). These quantities were multiplied by 10^10 so that they could be given in a F6.2 format in units of 10^-10 erg/(cm^2 s^1 A^1), thus reducing the logical record length by 183 bytes. The flux and the root-mean-square deviation of the observations (S, cf. bytes 380-562) were rearranged on the tape so as to correspond to the 61 wavelengths in ascending order (lamda =1360 to 2540 with lamda =2740 as the 61st value). The addition of the primary data file data resulted in the addition of 97 bytes so that the new version of the tape has: 989 - 244 - 183 + 97 = 659 bytes per logical record length. Also, the original tape had a first 989 byte record which was a reference record identifying the data file. This has been removed with the appropriate information as given in the reference below. There are 15 cases in the Primary Data File which had more than one line of correlative data for the given entry. See Table 4-1 in the published catalogue for double line entries. There is one entry (#1025) which has in the name field only "A" . This has not been retained in the machine-readable version. We would like to acknowledge the meticulous work of Mrs. P. A. Struthers in the addition of the primary data to the machine-readable version. Reference: C. Jamar, D. Macau-Hercot (Chercheur qualifie F.N.R.S.) and A. Monfils, Institut d'Astrophysique de Liege; G.I. Thompson, Royal Observatory, Edinburgh; L. Houziaux, Departement d'Astrophysique de Mons; and R. Wilson, University College London 1976, Ultraviolet Bright-Star Spectrophotometric Catalogue, ESA SR-27. (Also see announce- ment in CDS Information Bulletin No. 13, 1977, page 57.) 4-1