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[vsolj-alert 947] VSNET Weekly Campaign Summary

From owner-vsnet-campaign@kusastro.kyoto-u.ac.jp Tue Sep  4 03:09 JST 2001
To: vsnet-campaign
Date: Tue, 04 Sep 2001 03:09:05 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
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Subject: [vsnet-campaign 1155] VSNET Weekly Campaign Summary
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VSNET Weekly Campaign Summary

*** Last week news ***

(new targets)
  PY Per

    As reported by M. Simonsen on August 29, the UGZ-type star 
  PY Per is in outburst at 14.1mag (vsnet-campaign-dn 1421).

  V347 Pup

    As reported by B. Monard, the object is now relatively bright 
  (12.8mag on August 29; vsnet-campaign-nl 26).


    The blazer 3C66A has recently been brighter than usual 
  (14.1mag on August 28; vsnet-campaign-blazar 222).


    As reported by S. O'Connor, an outburst of 11.8mag of AS270 
  was detected on August 28 (vsnet-campaign 1146).

  V844 Her

    As reported by C. P. Jones on August 31, the SU UMa-type dwarf 
  nova V844 Her is undergoing a relatively rare outburst.   The last 
  outburst occurred in 2000 July.  The most unusual characters of 
  this dwarf nova is the apparent absence of normal outburst, while 
  the intervals of superoutbursts are not especially long 
  (vsnet-campaign 1148).  The superoutburst is still ongoing.  
  The current magnitude is around 12.2mag (vsnet-campaign-dn 1476).

  AQ Eri

    As reported by P. A. Dubovsky on August 31, AQ Eri experiences 
  an outburst at 13.3mag (vsnet-campaign-dn 1451).

  NGC 6440 X-ray transient (RA = 17h48m53s.4, Dec = -20d21'20")

    According to ATEL No. 74, the X-ray transient in NGC 6440 is in 
  outburst (in't Zand et al.).  The source has been confirmed to be 
  identified with the currently outbursting optical variable V2 
  (vsnet-campaign-xray 83, 84, vsnet-campaign 1151, 1152).

(continuous targets) 
  HO Del		(RA = 20h36m55s.49, Dec = +14d03'09".4)

    M. Moilanen performed time-series observations on August 29 
  and reported it was 14.3mag (vsnet-campaign-dn 1408).  The 
  obtained light curve clearly showed superhumps with a period of 
  0.063262d (vsnet-campaign-dn 1419).  The superoutburst is still 
  ongoing. It is now around 14mag (vsnet-campaign-dn 1413, 1426, 
  1439, 1452, 1465).

  V4739 Sgr = Nova Sgr 2001 No. 2  
			(RA = 18h24m46s.04, -30d00'41".1)

    B. Liller reported that no object was seen on August 18.04 and 
  a low-resolution spectrum with 0.20m telescope showed the H-alpha 
  emission (vsnet-campaign-nova 485).  A. Pearce reported an early 
  observation of 8.9mag on August 28 (vsnet-campaign-nova 486).
  M. Fujii performed spectroscopy and obtained a spectrum with H-alpha 
  (FWHM=4700km/s) and H-beta emission lines.  He suggested that 
  this nova is a He/N-type nova and the spectrum is similar to 
  that of the reccurent nova, U Sco (vsnet-campaign-nova 487).
  The object rapidly faded since around August 28 (vsnet-campaign-nova 
  488, 493).  The decline speed became rather gradual on August 30 
  (vsnet-campaign-nova 497, 500), and then, again rapidly faded 
  on August 31 (vsnet-campaign-nova 502, 505).  The current magnitude 
  is around 10.8mag (vsnet-campaign-nova 506).
  KV And		(RA = 02h17m13s.85, Dec = +40d41'30".6)

    The superoutburst is still ongoing.  It is now about 15mag 
  (vsnet-campaign-dn 1415, 1453).

  SN 2001du		(RA = 03h33m28s.7, Dec = -36d08'32")

    It is gradually fading and the current magnitude is about 14.6 
  (vsnet-campaign-sn 232).

  V630 Cyg		(RA = 21h34m59s.21, Dec = +40d40'18".5)

    The likely superoutburst continues at about 14.2mag 
  (vsnet-campaign-dn 1414, 1423, 1435, 1440, 1454).

  V2275 Cyg = Nova Cyg 2002 No. 2	
			(RA = 21h03m02s.00, Dec = +48d45'52".9)

    The smooth fading continues (vsnet-campaign-nova 489, 494, 496, 
  498, 501, 503, 505).  M. Fujii performed spectroscopy on August 22 
  and reported that the Balmer lines became more intensive.  The  
  FWHM of H-alpha is 3100km/s.  Based on the clear presence of Fe II 
  multiplets, Fujii concluded that the nova is a typical "Fe II-type" 
  nova (vsnet-campaign-nova 490). 

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

    WZ Sge has still repeated re-brightenings (vsnet-campaign-dn 1411,
  1412, 1422, 1425, 1434, 1438, 1464, 1475, vsnet-campaign 1149).
  The extensive campaign is ongoing (vsnet-campaign-dn 1410, 1418, 
  1429, 1447, 1459, 1462, 1468, 1469, vsnet-campaign 1153).

    The peak brightness of the fourth rebrightening may even surpass 
  those of the three preceding ones.  The profile of humps became 
  a "triple wave" (vsnet-campaign 1145, vsnet-campaign-dn 1424).
  The fourth rebrightening was terminated on August 28.  During 
  its fading phase, J. Pietz reported short-term variations with 
  an amplitude of 0.1-0.15mag (vsnet-campaign-dn 1409) and eclipses 
  became sharper and deeper (vsnet-campaign-dn 1420).  The QPOs 
  detected by M. Moilanen showed somewhat shorter period of 2-3min 
  than that observed in the previous one (vsnet-campaign-dn 1427).  
  At the bottom, the main hump was observed at phase 0.5 and shallow, 
  slightly broad, eclipses were also present (vsnet-campaign-dn 1431).  
    A rapid rising to the fifth rebrightening with 0.15mag/hr was 
  reported (vsnet-campaign-dn 1428, 1432, 1436, 1443).  During this 
  phase, there were weak periodic signals.  The strongest hump signal 
  resides just after the eclipse times.  It may be that altough 
  superhumps may have newly grown (vsnet-campaign-dn 1433).  At the 
  peak of the fifth rebrightening on August 30, the superhumps and 
  eclipses became weak (vsnet-campaign-dn 1444, 1446).  The duration 
  of this peak of was a little longer (vsnet-campaign 1147), however 
  faded on August 31 when humps and eclipses were again strong 
  (vsnet-campaign 1150, vsnet-campaign-dn 1456).  
    The sixth rebrightening was reported on August 31/September 1 
  (vsnet-campaign-dn 1458, 1461, 1470).  The clear appearance of 
  eclipses and humps at the sixth rebrightening maximum may suggest 
  the presence of a precessing component, which is eclipsed at certain 
  times (vsnet-campaign-dn 1460).  The duration of the flat maximum 
  exceeds 0.5 d (vsnet-campaign 1154).  The complicated "triple" humps 
  were observed (vsnet-campaign-dn 1463).  The phase of eclipses 
  particularly changed to a great extent.  At maximum, the phase tended 
  to be earlier than the predicted times.  Later during the decline, 
  the eclipses became quite asymmetric (vsnet-campaign-dn 1466).  
  On September 2, the object faded from the sixth rebrightening.  
  The QPOs with 2-5min were detected (vsnet-campaign-dn 1472).  The 
  "phase 0.6 dip" was also again observed (vsnet-campaign-dn 1474).  
    A new rebrightening was observed on September 2/3
  (vsnet-campaign-dn 1473, 1477).

  V1008 Her		(RA = 18h05m46s.31, Dec = +31d40'18".1)

    The long outburst had finally faded around August 27 
  (vsnet-campaign-dn 1441).

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

    The outburst continued at least until August 28 at 16.0mag 
  (vsnet-campaign-dn 1416).

  V445 Pup

    The object is now very faint (<14.1 on September 1; 
  vsnet-campaign-nova 492, 507).

  V1548 Aql

    R. J. Modic reported a new brightening of this nova from 14.4mag 
  on September 1 to 13.7 on September 2 (vsnet-campaign-nova 508).

*** 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:

  For more information, see [vsnet-campaign 1039]

  V446 Her campaign until September
    conducted by Matthias Schreiber, Boris Gaensicke, and Daisaku Nogami
  For more detailed information, see [vsnet-campaign-dn 918], 
  [vsnet-campaign-nova 349], or [vsnet-campaign 983]

  Two Years of Science with Chandra *
    * This meeting will also be the 12th Annual Maryland Astrophysics 
	September 5-7, 2001
    For more information, see [vsnet-campaign-xray 66]

*** General information ***

  V4739 Sgr
    Discovery Story by A. Pereira, see [vsnet-campaign-nova 483].
    Spectrum by M. Fujii:
					[vsnet-campaign-nova 487]
    Image by G. U. Nappi:
					[vsnet-campaign-nova 499]

  WZ Sge
    Nightly averaged magnitude, see [vsnet-campaign-dn 1417, 1430,
				    1445, 1457, 1467]
    Light curve by T. Hynek:
					[vsnet-campaign-data 82]
    Light curve by T. Vanmunster:
					[vsnet-campaign-dn 1424]
    Light curve by D. Starkey:
					[vsnet-campaign-dn 1432]
    Time-series data by Rit team:
					[vsnet-campaign-dn 1437]
					[vsnet-campaign-dn 1450]
					[vsnet-campaign-dn 1471]
    Sequence by A. Henden and A. Landolt, see [vsnet-campaign-dn 1442]
    Chart by M. Richmond:
					[vsnet-campaign-dn 1448]
  V2275 Cyg
    Multi color photometry by G. Sostero, see [vsnet-campaign-nova

(This summary can be cited.)	

Makoto Uemura

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