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***************************************************************** * * * YALE CATALOGUE OF BRIGHT STARS * * * * DOCUMENTATION FOR THE MACHINE-READABLE VERSION OF * * THE YALE CATALOGUE OF BRIGHT STARS * * R-SAW-7/79-36 * * * ***************************************************************** The YALE CATALOGUE OF BRIGHT STARS is in the public domain, and this documentation on the catalogue was extracted almost verbatum from a booklet, also in the public domain, whose preparation was funded by: National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland 2077l under contract NAS 5-25369 by: Theresa A. Nagy Systems and Applied Sciences Corporation 6811 Kenilworth Avenue Riverdale, Maryland 20840 This database is revision 3 of the Yale Catalogue of Bright Stars, and it was obtained on 9 track tape on March 17, 1981 from: Dr. Wayne Warren National Space Science Data Center Code 601 Godard Space Center Greenbelt, Md 20771 Dr. Warren says that revision 4 of the catalogue is due in late 1981, and that it will have revisions in the magnitude and color data for about 10% of the stars. The National Space Science Data Center does NOT have the capability of supplying the data base or revisions on floppy disks. The people who funded the documentation of this catalog, and the people who did the documentation work for a living. PLEASE DO NOT MAKE THEM COMPLETLY UNPRODUCTIVE BY CALLING THEM UP FOR INFORMATION. The documentation is all here in this file. Two programs written in Microsoft BASIC, Version 5.2, STAR.BAS, showing how to access the data and STARVAL.BAS, which reads all of the database and performs a SIMPLE check to verify database integrity are on this disk. The database, called STARx.DAT, is on this and seven additional disks. disk1 STAR.DOC documentation STAR.BAS sample database access program STARVAL.BAS database validation program STAR1.BAD BAD database on stars 0001 thru 0050 to show the errors that STARVAL can and cannot find in the data. STAR1.DAT database on stars 0001 thru 0884 disk2 STAR2.DAT database on stars 0885 thru 2059 disk3 STAR3.DAT database on stars 2060 thru 3234 disk4 STAR4.DAT database on stars 3235 thru 4409 disk5 STAR5.DAT database on stars 4410 thru 5584 disk6 STAR6.DAT database on stars 5585 thru 6759 disk7 STAR7.DAT database on stars 6760 thru 7934 disk8 STAR8.DAT database on stars 7935 thru 9110 ***************************************************************** * * * Table of Contents/List of Tables * * * ***************************************************************** Section 1 - Introduction . . . . . . . . . . . . . . . . . 1-1 Section 2 - Tape Contents . . . . . . . . . . . . . . . . 2-1 Section 3 - Tape Characteristics . . . . . . . . . . . . . 3-1 Section 4 - Remarks and Modifications . . . . . . . . . . 4-1 Section 5 - Sample Listing . . . . . . . . . . . . . . . . 5-1 Table 2-l Tape Contents . . . . . . . . . . . . . . . . 2-2 Table 3-1 Tape Characteristics . . . . . . . . . . . . . 3-2 Table 4-1 Published Errata in the Third Edition . . . . 4-3 Table 4-2 Stars with Sign Error of the Galactic Latitued in the Published Catalogue . . . 4-4 Table 5-1 Sample Listing . . . . . . . . . . . . . . . . 5-1 ***************************************************************** * * * 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 as 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 the origional preface of the published catalogue. This memo should be distributed along with any copy of the machine-readable version of the catalogue. ***************************************************************** * * * Section 2 - Tape 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 Tape Contents *********************** Byte Description Format 1-4 Yale Bright Star (BS) I4 (= Harvard Revised (HR) Number) 5-7 Flamsteed Number I3 8-14 Name 7A1 (Greek letters coded: alpha = 0l . . omega = 24) 15 Sign of Bonner Durchmusterung (BD) A1 16-22 DM Number I7 23-28 Henry Draper (HD) Number I6 29-33 Boss General Catalog (GC) Number I5 34-37 Trig. Parallax Catalogue Number I4 (when followed by decimal - 1963 Supplement) 38-43 Radial Velocity Catalogue Number I6 44 Double Star Catalogue A1 b - implies Aitken's Catalogue of Double Stars R - implies Rossiter's Catalogue of Southern Double Stars Other catalogues or lists unnumbered, are represented be letters: I - Innes F - Finsen K - Kuiper B - van Biesbroeck or van den Bos 45-49 Catalogue Number I5 50-51 Blank or letters indicating componets 2A1 of multiple-star system. 52-59 Variable Star Catalogue 8A1 (1958 or 1961 Supplement, suspected but unconfirmed variables are represented by "VAR?"left justified) 60-65 ***** Right Ascension (epoch 1900.0) ***** 60-61 Hours I2 62-63 Minutes I2 64-65 Seconds I2 66 Sign of Ten-Year change in Right Ascension A1 67-69 Ten-Year change in Right Ascension I3 (unit = seconds) 70-74 ***** Declination (epoch 1900.0) ***** 70 Sign A1 71-72 Degrees I2 73-74 Minutes I2 75-79 ***** Galactic Longitude ***** 75-77 Degrees I3 78-79 Minutes I2 80-84 ***** Galactic Latitued ***** 80 Sign A1 81-82 Degrees I2 83-84 Minutes I2 85-88 BS-HR Number I4 89-94 ***** Right Ascension (epoch 2000.0) ***** 89-90 Hours I2 91-92 Minutes I2 93-94 Seconds I2 95-99 ***** Change in Right Ascension ***** ****** (epoch 2000.0 - 1900.0) ****** 95 Sign A1 96-97 Minutes I2 98-99 Seconds I2 100-104 ***** Declination (epoch 2000.0) ***** 100 Sign A1 101-102 Degrees I2 103-104 Minutes I2 105-107 ***** Change in Declination ***** **** (epoch 2000.0 - 1900.0) **** 105 Sign A1 106-107 Minutes I2 108-111 ***** Visual Magnitude ***** 108 Sign A1 (if minus (-) magnitude) 109-111 Visual Magnitude I3 (unit = 0.01 magnitude) 112-113 Source: 2A1 b - Indicates photoelectric determination by UBV System R - Indicates HR magnitudes reduced by Rybka to V system H - Indicates original HR magnitude was was retained B - Indicates blended images ***** Color ***** 114 Sign A1 115-117 B-V in UBV System I3 (unit = 0.01 magnitude) 118-139 Spectral Class 22A1 (if composit spectral class, plus (+) in byte 139) 140 Sign A1 141-144 value I4 (unit = 10^-3 arcsec) 145-149 ***** Annual Proper Motion in Declination ***** 145 Sign A1 146-149 Value I4 (unit = 10^-3 arcsec) 150-154 ***** Parallax ***** 150 Sign A1 151-153 Trigonometric Parallax I3 (unit = 10^-3 arcsec) 154 D indicates Dynamical Parallax, which is A1 given only when Trigonometric Parallax is not available 155-160 ***** Radial Velocity ***** 155 Sign A1 156-160 Velocity (km/sec) 5A1 ("V?" appears not right justified) ***** Double Star Data ***** 161-163 Magnitude difference between two componets I3 of a visual binary, or between two brightest componets of a multiple system from the double star catalog, which may be inconsistent with the values given in bytes 107-110. (unit = 0.01 magnitude) 164-167 Maxium observed separation of the same two I4 componets acording to the paticular catalog cited. (unit = 0.1 arcsec) 168 Number of componets having lettered I1 designations in the catalog of double stars. 169-170 Remarks: 1 - The companion is optical. 2 - Visual binary. 3 - Common proper motion componets. 4 - Fixed-seperation companion. 5 - Two spectra are indicated on the radial velocity plates. 6 - The star is a spectroscopic binary. 7 - Magnitude and color given refer to the combined light of two or more stars. The following letters refer to types of remarks that appear in the book form of the catalogue: D - Double star data. G - Cluster, group, aggregate, or association membership. M - Comments on magnitude or color, except data on known variable stars. N - The name of a bright star. R - Radial velocity comments, including data on spectroscopic binaries. S - Comments on Spectra. V - Remarks on variable stars other than the data from General Catalogue of Variable Stars and its Supplement, which are abstracted in the Remarks for all stars with named variable star designations. * - Any combination of the above categories and other comments not falling under any of those categories. 171-178 Right ascension (1900) in radians F8.4 179-186 Declination (1900) in radians F8.4 187-194 Right ascension (2000) in radians F8.4 194-202 Declination (2000) in radians F8.4 ***************************************************************** * * * Section 3 - Tape Characteristics * * * ***************************************************************** ***** The Star Catalogue is normally supplied on IBM compatible ***** 9 track computer tape (eg. EBCDIC characters). It is also ***** available on special request on DEC compatible 9 track ***** computer tape (eg. ASC-II characters). The data on the ***** floppy disks are in ASCII. 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 tape are given in Table 3-1, if more than one number is given for any entry this refers to a data set with more than one file. The multiple numbers then refer to the first, second, third, etc. files of the tape. *********** Table 3-l IBM/EBDIC Tape Characteristics *********** Catalogue YBS Number of Tracks 9 Density (BPI) 1600 Number of files 1 Logical Record Length (bytes) 202 Blocksize (bytes) 20200 Blocking Factor 100 Record Format (IBM OS/JCL) FB Total number of logical Records 9110 Total number of blocks 92 ********** Table 3-1 DEC/ASCII Tape Characteristics ************ Catalogue YBS Number of Tracks 9 Density (BPI) 800 Number of files 1 Logical Record Length (bytes) 202 Normal Blocksize (bytes) 15150 Last Block Blocksize (bytes) 7070 Blocking Factor 75 Record Format (IBM OS/JCL) FB Total Number of logical Records 9110 Total Number of Blocks 122 ***************************************************************** * * * Section 4 - Remarks and Modifications * * * ***************************************************************** The magnetic tape version of the Third Revised Edition of the Catalogue of Bright Stars (1964, Yale University Observatory) was received in 1972 from the U. S. Naval Observatory. This version of the catalogue had seperate data files for the left-hand and the right-hand pages of the catalogue. Listed below are the modifications to that version. 1. Overpunches existed in several fields. These fields were decoded and all amperstands were converted to plus (+) signs. 2. Right-hand and left-hand page dara were merged into one data file. 3. The tape was converted from a 7-track to a 9-track tape. 4. The record size was expanded from 84 bytes (each page with overpunches included) to 202 bytes. 5. All published errata (cf. table 4-1) have been incorporated in the magnetic tape version. 6. One star (BS 1612) was found to have a blank magnitude field which when read with a FORTRAN F format yielded a zero value. This field was corrected to 3.8 as per the published catalogue. 7. The double star number or leter was not right or left justified. The bytes containing this information were modified so that only the number appears in bytes 45-49 and the letter portion of the identification appears only in bytes 50-5l. 8. The equatorial coordinates at both epochs 1900 and 2000 were computed in radians and added to each record. In addition to the published errata other identification errors have been noted over the past years. These possible errors are listed below for reference but the corrections have not been made to the machine-readable version (except for star BS 1101) of the catalogue since they do not constitute a published set of errata. BS # Published Value Correction 67 DM +1 degree 28 DM +0 degree 28 1101 DM -1 degree 572 DM -0 degree 572 6165 B-V +0(m/.)26 B-V -(m/.)26 7705 HD 191570 HD 191571 8417 HD 209790 HD 209791 8841 HD 219449 HD 219430 ***** (m/.) was printed as a "." with a "m" directly above ***** the "." The second edition of the Yale Bright Star Catalogue (1940) included all except 19 of the 9110 stars first listed in the Harvard Annals (Volume 50, 1908), the "HR" catalogue whose numbering was exactly taken over in the Yale Bright Star Catalogue (YBS). There are 19 blank records in both the published version of the catalogue as well as the machine-readable version of the YBS. There are 9091 records with information, and 19 records with just the HR number (the remainder of the record is blank). The HR stars which are blank are given below. 92 95 182 663 1057 1630 1841 2472 2496 3515 3671 6309 6437 6515 7138 7189 7539 8296 8945 In addition to the information given in the Catalogue of Bright Stars - Third Revised Edition, the value of the 10-year change in the right ascension (bytes 66-69) is given plus the equatorial coordinates at both epochs (1900 and 2000) in radians (bytes 171-202). The published version of the catalogue had sign errors for the stars listed in Table 4.2. For all of the stars listed a minus sign should appear for the sign of the galactic latitude in the hard copy, the magnetic tape version is correct. It should be noted that more stars have colors on the machine-readable version of this catalogue than given in the published version of the catalogue. Also, sometimes the spectral type differs from that as listed in the Third Revised Edition (e.g. HR 72 is given as a G0 star in the published catalogue but as a G5 IV-V star on the tape). It is unclear what or who is the source of these updates. ******** Table 4-1 Published errata in the Third Edition ******** BS # Column For Read 472 R blank 3 967 Radial Velocity -65 -6 969 Radial Velocity +22 +2 1210 Double Srars: delta m blank 4.2 Sep blank 75.3 No blank 3 1966 RA (2000) 2x 27 2063 DM 11711 1171a 2402 DM 136 1136 2564 Dec (1900) 1' 18' 3366 HD 72622 72292 3445 B-V -0.71 +0.71 3759 Radial Velocity +98 +10 3962 HD 87330 87318 4101 R blank 1 4450 delta alpha 5v 55 5422 R 2 1 5703 Dec (1900) + - Galactic Long 20 deg 59' 347 deg 43' Galactic Lat +53 deg 21' +34 deg 3' Dec (2000) +14 deg 49' -15 deg 33' 5839 Radial Velocity +8 +4 6206 Double Stars: Sep 957. 95.7 6616 B-V +1.16 +0.70 6622 Spectral Class B35 B3V 6984 RA (1900) 27s 37s Galactic Long l' 2' Galactic Lat 5' 3' RA (2000) 4s 14s 7257 Radial velocity +16 +13 7517 HD 186648 186675 7543 R blank 1 7567 Variable Star Cat V Cyg V280 yg 7645 R blank 1 8225 R blank 1 8570 HD 213306 213296 8571 HD 213307 213306 8833 R blank 1 ********** Table 4-2 Stars with sign error of the ************** ********** galactic latitude in the published catalogue. ******** 93 488 561 839 964 1046 1073 1324 1330 1550 1612 1615 1689 1779 1795 1805 1843 1850 1914 1945 2074 2116 2135 2184 2223 2250 2253 2269 2287 2342 2362 2385 2404 2422 2432 2441 2474 2479 2517 2530 2582 2622 2639 2694 2723 2796 2825 2853 2923 2992 3004 3034 3099 3113 3160 3170 3177 3237 3237 3242 3253 3267 3270 3296 3327 3328 3520 3588 3614 3784 3837 3875 3920 4091 4095 4114 4144 4147 4169 4177 4179 4188 4198 4210 4228 4239 4271 4487 4499 4511 4541 4573 4599 4603 4644 4729 4730 4730 4781 4771 4830 4972 5171 5349 5459 5460 5546 5873 5937 6197 6381 6392 6398 6450 6456 6522 6700 6716 6724 6727 6762 6798 6825 6838 6858 6946 6973 7158 7315 7331 7332 7357 7437 7458 7472 7490 7540 7670 7743 7770 7826 7911 7926 7984 8023 8035 8053 8064 8107 8136 8161 8185 8206 8259 8677 8745 8797 8803 8894 8990 9100 ***************************************************************** * * * Section 5 - Sample Output Listing * * * ***************************************************************** The following is a listing of the EBCDIC (ASCII) characters on the machine readable version of this catalogue. If this document represents a binary tape, this listing is a formatted listing for convience. The sample listing represents the contents of the first phusical block on the tape. The header numbers (first three lines) when read vertically refer to the byte which then agrees with the information in table 2-1. ********* Table 5-1 Sample Output Listing ********************** ***** note: due to lazyness and your probable lack of a 132 ***** column line printer, I have reformatted the sample listing ***** and only included a few stars vs the 100 stars in the ***** documentations sample listing. You should be able to ***** get the general idea tho. Bytes 1 2 3 4 5 123456789 123456789 123456789 123456789 123456789 000-050 0001 +4404550 3 54 35 46 051-100 0 0 2+ 31+444011426-16530001 0 511+ 5 9+ 101-150 4513+33 646 R A0 -0016-0017 151-200 - 18 29 2153 0.0001 0.7796 0.0226 0.78 201-202 92 000-050 0002 - 104525 6 51 32 051-100 235956+ 31- 1 3 9819-61 80002 0 5 4+ 5 8- 101-150 030+33 628 +110G G9 +0039-0055 151-200 + 14 6.2829 -0.0183 0.0221 -0.00 201-202 87 ***** note: due to the poor quality of the photoreduced ***** printout, 5s, 6s, 8s, & 9s may have been mistaken ***** each other.