[vsnet-campaign-news 284] VSNET Weekly Campaign Summary

[Makoto Uemura]

VSNET Weekly Campaign Summary

*** Headlines ***

Nova in Sco 2005! ----- V1188 Sco 
Rare outburst! ----- FL TrA

*** Last week news ***

(new targets)
  V1188 Sco                (RA = 17h44m21s.59, Dec = -34d16'35".7)
    (= Nova Sco 2005 = ASAS174422-3416.5)

    G. Pojmanski reported a detection of a probable nova on 26 July 
  by the ASAS-3 system.  The object was fainter than 14mag at 
  Jul 23.287, and first detected V=9.109 at Jul 25.284
  (vsnet-campaign-nova 1713).  Following this alert, the object was
  soon confirmed by many observers (vsnet-alert 8569, 8570, 8572,
  vsnet-campaign-nova 1716, 1717, 1718,  1719, 1720, 1721, 1726, 1728).  
  M. Fujii took a spectrum of this object, in which the H-alpha line
  is clearly seen in emission, consistent with the classical nova
  classification (vsnet-campaign-nova 1722).  


  FL TrA                   (RA = 16h30m36s.61, Dec = -61d50'11".1)

    R. Stubbings reported a very rare outburst of FL TrA on 
  July 27.469 at 15.0mag.  He suspected that the position of the
  outbursting object is slightly different from the catalogued
  position (vsnet-campaign-dn 4485).  B. Monard confirmed the
  outburst, and reported the above position (vsnet-alert 8590).   
  There is no indication of the progenitor of FL TrA in catalogues
  like USNO (A2.0/B1.0) and 2MASS, however, DSS POSS2/UKSTU IR shows
  the object clearly (vsnet-alert 8591).  He also reported the 
  detection of growing superhumps with a period of 0.060 d
  (vsnet-alert 8593).
  

  SDSS J124058.03-015919.2 (RA = 12h40m58s.03, Dec = -01d59'19".2)

    According to MNRAS 361, 487, SDSS J124058.03-015919.2 is a new 
  AM CVn star with a 37-min orbital period.  The spectrum resembles
  those of quiescent AM CVn stars (GP Com, CP Eri etc.).  The object
  is normally at V=19.7, but its outbursts may be detected 
  (vsnet-campaign-dn 4484).


  SDSS J225831.18-094931.7 (RA = 22h58m31s.18, Dec = -09d49'31".7)

    H. Maehara reported an outburst of this object at V=12.59 at July
  31.78473.  SDSSJ225831.18-094931.7 is an SU UMa-type dwarf nova.  
  The most recent (reported) outburst occurred on May 31 (reported by
  Maehara) at mag V=12.90 (vsnet-campaign-dn 4486).


  V803 Cen              (RA = 13h23m44s.5, Dec = -41d44'30".1)

    V803 Cen continues to be bright.  T. Kato commented that it may be
  a possible superoutburst or an oscillating state (vsnet-campaign-dn
  4487).


(old targets)
  Swift J1753.5-0127    (RA = 17h53m28s.3, Dec = -01d27m06s)

    M. Uemura reported preliminary period analysis of observations of
  this new X-ray transient, Swift J1753.5-0127, taken by the Kyoto
  team (observer: Imada & Kubota).  During 15 - 23 July, the object
  kept at almost constant magnitude.  A linear fitting yielded a
  slightly fading trend of 0.01 mag/day.  While weather conditions
  were not good in several nights, nightly averaged data apparently
  show modulations with an amplitude of ~0.2mag and a period of about
  4-5 days.  No significant short-term (a few hours - days)
  periodicity was detected (vsnet-campaign-xray 371).
  

  AM Her                (RA = 18h16m13s.4, Dec = +49d52'03".1)

    AM Her is rapidly recovering from the long-lasting faint state
  (vsnet-campaign-polar 44).


  V378 Ser              (RA = 17h49m24s.57, Dec = -12d59'59".2)

    K. Nakajima reported V=14.92 at July 27.52512 
  (vsnet-campaign-nova 1724).


  V5116 Sgr             (RA = 18h17m50s.77, Dec = -30d26'31".2)

    H. Maehara reported V=10.67 at July 27.64373, and K. Nakajima
    reported V=10.71 at July 28.47322 (vsnet-campaign-nova 1725, 1726).


  V1663 Aql             (RA = 19h05m12s.50, Dec = +05d14'12".0)

    The latest observation show V=14.78 at July 28.48481 (by
  K. Nakajima; vsnet-campaign-nova 1714, 1725, 1726).


  SN 2005cs             (RA = 13h29m52s.85, Dec = +47d10'36".3)

    Y. Sano reported 14.28CR mag at 22.491 July (vsnet-campaign-sn
  1035).  K. Nakajima reported 14.50C mag at 28.50609 July
  (vsnet-campaign-nova 1726).


  V1413 Aql             (RA = 19h03m46s.84, Dec = +16d26'17".1)

    T. Kato reported that recent observations show that the eclipse of
  this symbiotic nova continues.  The object is AS338, whose
  eclipsing nature was revealed by Wakuda (vsnet-campaign-symbio 104, 
  105).


*** Future schedule ***

*** General information ***

  Nova Sco 2005
    Chart presented by S. Otero:
      http://ar.geocities.com/varsao/Carta_Nova_Sco_2005.htm
                                      [vsnet-alert 8573]
    Chart presented by JVSSA:
      http://www4.airnet.ne.jp/mira/nhk/flash/0200/0238_ASAS174422.gif
                                      [vsnet-campaign-nova 1723]
    Spectrum taken by M. Fujii:
      http://www1.harenet.ne.jp/~aikow/etc/v1188_sco_20050731.gif
                                      [vsnet-campaign-nova 1729]

  (Recent astro-ph preprints)
  A possible black hole in the gamma-ray microquasar LS 5039
    http://arXiv.org/abs/astro-ph/0507549
                                      [vsnet-campaign-xray 370]
  The Disappearing Act of KH 15D
    http://arXiv.org/abs/astro-ph/0507578
                                      [vsnet-campaign-orion 101]


(This summary can be cited.)	

Regards,
Makoto Uemura
Hiroshima University