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J/A+AS/44/387       Hα-emission stars                  (Macconnell+, 1981)
Discoveries on southern red-sensitive objective-prism plates III:
new stars having Hα in emission.
    Macconnell D.J.
   <Astron. Astrophys. Suppl. Ser., 44, 387-399 (1981)>
   =1981A&AS...44..387M
ADC_Keywords: Stars, emission

Keywords: Hα-emission stars - Be stars - objective-prism surveys


Abstract:
   The catalog includes 731 early-type stars (non-banded spectra) and
   34 late-type stars (banded spectra) showing Hα in emission
   which were not previously known as emission-line stars.

Description (by B. Skiff):
    This is a rough working list of accurate coordinates for MacConnell's
    1981 list of H-α emission objects. The original catalog is made
    of 2 tables: table I with the early-type stars, and table II with the
    late-type stars. A few objects were not recoverable, either due to
    gross position errors or simply from plate flaws or something similar.
    Many cases were verified using the SuperCOSMOS H-α emission
    survey images.

    MacConnell's magnitudes are replaced with much better V data mainly
    from ASAS-3. The original magnitudes have a scale error at the faint
    end (the faintest "11.9" stars are typically mag 13 to 14), and are
    generally rather scattered.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
catalog.dat      128      771   Catalog of stars having H-α emission
                             (737 early-type and 34 late-type)


See also:
    III/180 : SS(77) Catalogue: new H-alpha em* in Milky Way (Stephenson+ 1977)
    III/205 : H-alpha Stars in Northern Milky Way (Kohoutek+ 1997)
    J/A+A/402/963 : Stephenson Hα stars (Maheswar+, 2003)


Byte-by-byte Description of file: catalog.dat

   Bytes Format Units   Label     Explanations

   1-  5  A5    ---     ---       [[M81]]
   7-  8  A2    ---     Tbl       [I ] Table number (I or II)
       9  A1    ---     ---       [-]
  10- 12  I3    ---     No        [1/737] Star number in table
  17- 18  I2    h       RAh       Right Ascension J2000 (hours)
  20- 21  I2    min     RAm       Right Ascension J2000 (minutes)
  23- 27  F5.2  s       RAs       Right Ascension J2000 (seconds)
      29  A1    ---     DE-       Declination J2000 (sign)
  30- 31  I2    deg     DEd       Declination J2000 (degrees)
  33- 34  I2    arcmin  DEm       Declination J2000 (minutes)
  36- 39  F4.1  arcsec  DEs       Declination J2000 (seconds)
      41  A1    ---     s         [UTMgs?] Source of position (1)
  43- 46  F4.1  mag     Vmag      ? V-band magnitude (1)
      48  A1    ---     ---       [V]
  51- 53  A3    ---     SpT       Spectral type
  59-128  A70   ---     Remarks   Remarks, by B. Skiff

Note (1): Origin of position as follows:
   U = UCAC2 (Cat.  I/289)
   T = Tycho-2 (Cat. I/259)
   M = 2MASS all-sky release (Cat. II/246)
   g = GSC-2.2 (I/271) or GSC-2.3 (I/305)
   s = SkyView estimate (±2")
   ? = position from original catalog; concerns the 3 stars which could
       not be retrieved:
       * I-128: B1950=07:36:12.5-34:58:47, J2000=07:38:03.5-35:05:39
       * I-242: B1950=08:26:32.1-26:11:20, J2000=08:28:39.5-26:21:22
       * I-563: B1950=17:27:11.6-39:55:06, J2000=17:30:40.8-39:57:21


History:
    The catalog was prepared by Brian Skiff (Lowell Observatory)
(End)                                   Francois Ochsenbein [CDS]    18-Jul-2009