[vsnet-alert 75] more about V725 Aql

[tkato@kusastro.kyoto-u.ac.jp]

  Dear vsnet-alert members,

  After our initial alert on unidentified outbursting stellar image in the
field of this variable star, we have been informed by Dr. D. Welsh (Canada,
welch@physics.mcmaster.ca) of a bibliographic list of V725 Aql compiled
from the "Bibliographic Catalogue of Variable Stars" and its supplements.
  I have been surveying the litertures listed, and found some additional
information on this star.

 * Bruch 1983 (IBVS 2287): UBV photometry during quiescence.
     V = 15.79 +/- 0.11, B-V = 1.52 +/- 0.14, U-B = 0.60 +/- 0.47
     Bruch notes that the colors resembles those of the recurrent nova
     T CrB.  However, one should be careful in interpreting these data
     because photometry was apparently done for the object identified by
     Vogt and Beteson 1982 (AsAp Sup. 48, 383) = Downes and Shara 1993
     (PASP 105, 127).

 * Echevarria 1984 (Mexico Rev. Astr. Astrof.): a compliation of UBV
     photometry of CVs which includes the photometric data by Bruch.

 * Fuhrmeister 1991 (MVS 12, 94): a survey of 250 Sonneberg plates.
     Following outbursts are listed; the first three (*) are identical
     with those reported in Rohlfs 1949 (Veroff. Sternwarte Sonneberg
     1, Nr. 3 = discovery paper).

             JD
         ------------------
         2428040 - 8048 (*)
            9429        (*)
         2430704        (*)
         2441921  (two plates)
         2447039

     These data seem to suggest a low outburst frequency of this object.
     No information of identification was given.

  Our library lacks two most important discovery papers for identifying
what star is true V725 Aql:

   Rohlfs, E. 1949, Veroff. Sternwarte Sonneberg 1, Nr. 3
   Hoffmeister 1957, MVS 1, 245.

Can anyone check them?

  Some additional information seem to have appeared in various litertures,
which we can't access.

  * Petit 1960, JO 43, 17
  * Schneller 1960, GUL 2.5.1
  * S.V.S.O. 1987, S.V.S.O. Rep. 1986: 2.A.1
  * S.V.S.O. 1987, S.V.S.O. Rep. 1986: 2.A.2
  * Khruzina, Shugarov 1991: Atlas of Cataclysmic Variables (Moscow)

  We would like to hear any further information and observation.

Regards,
Taichi Kato and Ouda team

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