[vsolj-alert 961] VSNET Weekly Campaign Summary

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

From owner-vsnet-campaign@kusastro.kyoto-u.ac.jp Tue Nov 20 05:59 JST 2001
To: vsnet-campaign
Date: Tue, 20 Nov 2001 05:59:36 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
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Subject: [vsnet-campaign 1229] VSNET Weekly Campaign Summary
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VSNET Weekly Campaign Summary

*** Last week news ***

(new targets)
  DM Dra		(RA = 15h34m12s.13, Dec = +59d48'31".9)

    As reported by T. Kinnunen on November 14, an outburst of DM Dra 
  at 14.6mag was detected (vsnet-campaign 1227).  T. Vanmunster 
  discovered superhumps with an amplitude of 0.36 mag on Novemer 
  14/15 and revealed its SU UMa-type nature (vsnet-campaign-dn 1890).  
  He furthermore reported their period of 0.0734 +/- 0.0030 d which 
  substantially differs from that previously reported 
  (vsnet-campaign-dn 1891).  The Kyoto team also detected superhumps 
  and reported candidates of the period of 0.0733 d or 0.0750 d 
  (vsnet-campaign-dn 1910).  T. Kato reported that the observation at 
  Kyoto in 2000 October during a possible superoutburst showed the 
  amplitude of superhumps were less than 0.1mag.  This suggests that 
  the amplitude of superhumps can quickly decay in this system 
  (vsnet-campaign 1228).  The superoutburst is still ongoing 
  (vsnet-campaign-dn 1894, 1901, 1906).


  SN 2001fz		(RA =  06h44m50s.26, Dec = -27d37'12".7)

    IAUC 7753 informed the discovery of a SN in the neighbouring galaxy
  NGC 2280 in Canis Major.  The Beijing Astronomical Observatiory team 
  discovered SN 2001fz on Nov. 15.8 (17.4 mag) and 16.7 (17.0 mag) at 
  the nearby galaxy NGC 2280.  The position is about 16" east and 66" 
  north of the nucleus of the inclined spiral galaxy NGC 2280.  
  It locates the outermost part of the arm region.  The host galaxy is 
  the late type, so there are many H II regions on the disk.
  The expected maximum for typical SN Ia in this galaxy is mag about
  14.0 (included the Galactic extinction), and mag about 16 for typical
  SN II (vsnet-campaign-sn 277, 278).

  
  XRF011030		(RA = 20h43m32s.5, Dec = +77d17'17".4)

    Harrison et al. obtained a 47 ksec Chandra observation of the 
  field containing the BeppoSAX X-ray transient XRF 011030 (GCN 1118), 
  centered on the radio transient reported by Taylor et al. (GCN 1136). 
  The X-ray spectrum over 0.2-5 keV is consistent with a power law of 
  photon index ~1.45.  They derived an unabsorbed flux of 2.4e-13 erg 
  cm^-2 s^-1. (vsnet-campaign-xray 97).


  TK5                   (RA = 19h17m26s.5, Dec = +37d10'41")

    P. A. Dubovsky detected an outburst (14.2mag) of this object 
  on November 17.  It is the brightest outburst reported to VSNET 
  (vsnet-campaign-dn 1913).

   
(continuous targets) 
  EY Cyg		(RA = 19h54m36s.77, Dec = +32d21'54".7)
    
    The long rare outburst is still ongoing. The object is now about 
  12.5mag (vsnet-campaign-dn 1896, 1900, 1907, 1914).


  SN 2001fv		(RA = 11h04m01s.66, Dec = +28d01'55".7)

    The CfA team revealed that SN 2001fv is of type Ia few weeks 
  after maximum and in the plateau phase (vsnet-campaign-sn 276).


  CC Cnc		(RA = 08h36m19s.17, Dec = +21d21'05".4)

    The superhump detection by the Kyoto team confirmed the current 
  outburst is a superoutburst (vsnet-campaign-dn 1889).  
  The superoutburst is still ongoing (vsnet-campaign-dn 1886, 1887, 
  1895, 1902, 1905).  Using the 6 nights observations at Kyoto, 
  T. Kato reported the superhump period of 0.07571(4) d which is 
  3.0% longer than the orbital period.  Modulations with a period 
  of 2-3 d is also superimposed on the light curve, suggesting the 
  presence of a beat phenomenon (vsnet-campaign-dn 1911).  In the 
  data observed by J. Pietz, T. Kato noticed a possible low-amplitude 
  QPO feature (vsnet-campaign-dn 1915).


  AK Cnc		(RA = 08h55m21s.21, Dec = +11d18'14".7)
   
    The object showed a possible rapid fading on November 14 
  (vsnet-campaign-dn 1897), and then again brightened.  The early 
  brightening may be precursor of the current possible superoutburst
  (vsnet-campaign-dn 1904).


  1RXS J232953.9+062814 (RA = 23h29m54s.30, Dec = +06d28'10".9)

    The object is now very gradually fading (vsnet-campaign-dn 1884, 
  1885, 1892, 1893).  A. Oksanen reported the object has faded to 
  16.6mag on November 17 (vsnet-campaign-dn 1903).  The light curve 
  showed superhumps and sometimes double humps (vsnet-campaign-dn 1885).  
  Using the data on November 13 and 14, the period analysis yielded 
  0.04591(8) d, which is 0.8% shorter than the superhump period.
  The emergence of a significantly different period is highly 
  suggestive of the (co-)existence of orbital modulations 
  (vsnet-campaign-dn 1888).  The superhump signal became weak on 
  November 16, and the overall feature resembles the quiescent light 
  curve.  The period analysis of the data on November 14 and 16 
  yielded the period of 0.04522 d, which means the superhump excess 
  is about 2% (vsnet-campaign-dn 1899). 


  U Gem                 (RA = 07h55m05s.55, Dec = +22d00'09".2)

    The object is going back to quiescence (vsnet-campaign-dn 1908).


  WZ Sge		(RA = 20h07m36s.53, Dec = +17d42'15".3)

    The gradual fading still continues (vsnet-campaign-dn 1909).


  SN 2001fe		(RA = 09h37m57s.10, Dec = +25d29'41".3)

    The CfA team revealed that SN 2001fe is of type Ia, near maximum 
  on Nov. 14 (vsnet-campaign-sn 276).


  SN 2001ff		(RA = 08h57m00s.97, Dec = +13d11'59".5)

    The CfA team revealed that SN 2001ff is of type II past maximum 
  (vsnet-campaign-sn 276).


  IX Dra		(RA = 18h12m32s.2, Dec = +67d04'41")

    As reported by Pavol A. Dubovsky on November 17, the ER UMa-type 
  dwarf nova, IX Dra is undergoing a bright outburst (14.6mag), 
  which may be a superoutburst (vsnet-campaign-dn 1912).

  
*** Future schedule ***

  WZ Sge campaign 
    D. Steeghs wrote:
	"Several of us are organizing a campaign on the current outburst 
  of WZ Sge, using a large variety of ground based facilities as well as 
  space observatories.  A web-page has been setup listing the scheduled 
  observations so far which we intend to keep up to date at:

	http://vsnet.astro.soton.ac.uk/~ds/wzsge.html
  "
  For more information, see [vsnet-campaign 1039]


  Supernova campaign: A great opportunity for amateurs by M. Schwartz.
    For more detailed information, see [vsnet-campaign-sn 233]
    announce on the HST observations, see [vsnet-campaign-sn 240, 246]
 

  International Conference on Classical Nova Explosions
	 Sitges (Barcelona), Spain: 20-24 May 2002
    For more detailed information, see http://vsnet.ieec.fcr.es/novaconf
					[vsnet-campaign-nova 643]

  Blazar meeting at Tuorla: June 17-21, 2002
	for more information, see http://vsnet.astro.utu.fi/blazar02
					[vsnet-campaign-blazar 232]

 
*** General information ***

  Spectra of recent supernovae:
	http://cfa-www.harvard.edu/cfa/oir/Research/supernova/RecentSN.html
					[vsnet-campaign-sn 276]

  DM Dra
    Observations by T. Vanmunster:
	http://vsnet.lunarpages.com/cbabelgium
					[vsnet-campaign-dn 1898]

(This summary can be cited.)	

Regards,
Makoto Uemura

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