[vsnet-chat 143] Re: V384 Sco..

[Taichi Kato <tkato>]

Berto Monard wrote:
> V384 Sco is categorized as an old (1893) 'nova :' and also listed as
> a suspected TOAD. It's one of a number of obscure targets on my
> observing program amongst others like ?? Pup, ?? Sgr, NN Sgr ,
> V3941 Sgr, V893 Sco (?!) ....

   According to Duerbeck's nova catalogue (Space Sci. Rev. 45, 1 (1987)),

  "V384 Sco = N Sco 1893 = N Sgr(!) 1893 = HV 7104, discovered by H. H. Swope
on Harvard plates.  The nova is seen on only three plates between 1893 April
30 and May 18 (H. H. Swope, HB 902, 5 (1936))"

   Position by Swope is:

   17h 58m 20s -35o 39' 27" (in B1950.0, probably precessed from the original
literature)

   The quiescence candidate by Duerbeck is located at:

   17h 58m 21s.54  -35o 39' 28".0 (18.5 mag star on SRC-J plate)

   The nova was mag 12.3p when discovered.  Extrapolated(?) maximum by
Duerbeck is 9.3 (decline observed?).  Duerbeck wrote: "amplitude suggests
nova.  No spectroscopic information is available."

> The (2000) coordinates of V384 Sco are 18 01 43, -35 39. This
> location is situated well within the boundaries of Sagittarius! 
> What for an arrangement is that?

   Actually located between V557 Sgr (CWA) and V563 Sgr (I)!

   Regarding other variables mentioned, NN Sgr seems to coincide with
IRAS 18433-2827 (IR color suggests a normal red star) and V3941 Sgr (UG:
11.5-<14p) coincides with a red star on my previous CCD images.  They
seem least likely to be dwarf novae.  I'm interested on what basis NN Sgr
has been paid attention to.

Regards,
Taichi Kato

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp