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[vsolj-alert 810] VSNET Weekly Campaign Summary (Aug. 8)



From owner-vsnet-campaign@kusastro.kyoto-u.ac.jp Tue Aug  8 03:01 JST 2000
To: vsnet-campaign
cc: uemura
Date: Tue, 08 Aug 2000 02:50:26 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
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Subject: [vsnet-campaign 414] VSNET Weekly Campaign Summary
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VSNET Weekly Campaign Summary

*** Last week news ***

(new targets)
  V730 Sgr		(RA = 19h23m00s.79, Dec = -28d29'29".2)

    As report by Williams in [vsnet-alert 5167], the suspected dwarf nova 
  V730 Sgr was in outburst (13.6mag on August 4).  The first outburst reported 
  to VSNET was in 1998 May, by Stubbings (mv=13.8) (vsnet-campaign 409).  
  The data observed by N. Butterworth can be seen in [vsnet-campaign-data 34] 
  and T. Kato commented about the data that the data seems to indicate the 
  absence of variations greater than 0.1 mag (vsnet-campaign 412).
    More time-series photometry is needed to clarify the sub-type of this 
  object.


  SN 2000da		(RA = 00h03m06s.52, Dec = -01d54'41".8)

    This supernova was discovered by the Lick Observatory team (IAUC 7474).
    H. Yamaoka reported that the recession velocity of UGC 5 (the host galaxy 
  of SN 2000da) is 7271 km/s, from which the expected maximum of typical 
  SN Ia is about 16.6 mag (vsnet-campaign-sn 38).
    Close monitorings are encouraged.


(continuous targets)
  SY Vol		(RA = 08h53m28s.9, Dec = -71d12'29".9)

    The outburst has faded since July 31 (vsnet-campaign-dn 74).
  Now it is at quiescent state.

  
  BR Lup		(RA = 15h35m51s.61, Dec = -40d34'25".4)

    The superoutburst continues.  The current magnitude is about 14.0mag 
  (vsnet-campaign-dn 98).  Time-series observations are strongly encouraged.


  V1008 Her		(RA = 18h05m46s.4, Dec = +31d40'18")

    T. Vanmunster performed an unfiltered CCD photometry on July 30/31 
  and reported that the resulting light curve is flat, showing no periodic 
  modulations.  With his past run, he commented that this outbursting 
  object seems to be an UGSS type dwarf nova (vsnet-campaign 406).
  The long outburst finally began fading from August 4 (13.7mag by 
  M. Reszelski)(vsnet-campaign-dn 95).
 
  
  DH Aql		(RA = 19h26m12s.05, Dec = -10d15'21".4)

    H. Iwamatsu and T. Kato performed CCD photometry on this SU UMa-type 
  dwarf nova under superoutburst on August 2, and confirmed that the object 
  was still bright (vsnet-campaign-dn 81).  From the light curve obtained 
  through August 3 observation at Ouda station by H. Iwamatsu and T. Kato, 
  they revealed that there were fully grown superhumps with the amplitude 
  of 0.30mag (vsnet-campaign-dn 92).  They calculated the superhump period 
  with the data on August 3, 4, and 5 to be 0.07991 d (vsnet-campaign-dn 99).
    It is still in superoutburst and the current magnitude is about 12.7mag.  
  More observations are strongly encouraged.

 
  Delta Sco		(RA = 16h00m19s.9, Dec = -22d37'17")

    E. Pollmann reported the equivalent width of H-alpha line on July 30 
  to be 1.9 and 1.6 A derived from the two spectra (vsnet-campaign-be 21).
  The object may show slightly fading (vsnet-campaign-be 31).


  V4641 Sgr		(RA = 18h19m21s.6, Dec = -25d24'25")

    No prominent activity was reported (vsnet-campaign-xray 27,30,31).


  SN 2000cx		(RA = 01h24m46s.15, Dec = +09o30'30".9)
 
    This supernova reached the maximum at about 13.1mag around the end of July 
  (vsnet-campaign-sn 36), and then, started fading (vsnet-campaign-sn 39).
  The current magnitude is about 13.9mag. 


  1H 1933+510		(RA = 19h34m36s.08, Dec = +51d07'42".2)

    After this new likely dwarf nova (originally NL type) returned to 
  low-state, another outburst was reported by S. O'Connor at 15.8mag 
  on August 4 (vsnet-campaign 408).  T. Vanmunster performed CCD photometry 
  on August 04/05 and reported that the resulting light curve shows some 
  small modulations, but clearly nothing related to superhumps 
  (vsnet-campaign 411).  G. Tovmassian and S. Zharikov got the spectrum which
  looks very similar to Dwarf Novae in outburst (vsnet-campaign 413).
    Time-series photometry is strongly urged to study this object and the 
  outburst nature.


  CI Aql                (RA = 18h52m03s.6, Dec = -01d28m38.9s)
  
    The data observed by S. Kiyota can be seen in [vsnet-campaign-data 25-33]. 
  

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

    The striking oscillation is ongoing.  A brightening was reported 
  on July 31 (13.6mag by R. Stubbings) (vsnet-campaign-dn 76).
  On August 1st, R. Stubbings reported the object was dimmer than 13.9mag, 
  and then, showed another brightening on August 2 (vsnet-campaign-dn 82).
  S. Walker performed CCD photometry on August 1 and 2, and detected 
  possible superhumps with their amplitude of 0.1mag (vsnet-campaign-dn 84, 
  vsnet-campaign 407).  A rapid fading from the bright outburst was 
  reported on August 5 ( <14.8 by R. Stubbings)(vsnet-campaign-dn 96). 
    Close monitorings and long-run with CCD are encouraged.


  BL Lac                (RA = 22h02m42s.86, Dec = +42d16'37.6")

    The activity becomes mild (vsnet-campaign-blazer 50, 51).


  XTE J1118+480         (RA = 11h18m10s.9, Dec = +48d02'12".9)

    A dramatic fading from the long outburst was reported by M. Verdenet 
  (14.3mag on July 31), and then, the light curve of Kyoto team confirmed 
  the trend (vsnet-campaign-xray 28,29).  The decline rate is about 0.07mag/d, 
  which is faster than previously reported one (vsnet-campaign-xray 29,25,34).
  V. Simon sent the long-term light curve to M. Uemura and it can be seen 
  in [vsnet-image 13] (vsnet-campaign-xray 33).  A. Oksanen and M. Moilanen 
  reported their CCD observation of 14.7mag on August 5, which confirmed 
  the rapid decline (vsnet-campaign-xray 35).
    It is in rapid decline phase.  Time-series observation will reveal 
  the activity during this phase of X-ray nova.
 

  V1494 Aql

    The data observed by L. Cook on JD2451711 - 2451755 can be seen in 
  [vsnet-campaign-nova 73].


  V2051 Oph

    The object, which had faded on July 24, brightened again on July 31
  (vsnet-campaign-dn 77).

    
*** Future schedule ***
 
  V382 Vel, V1494 Aql, Nova in LMC 2000 campaign 
    (August 7)          (August 21)

    S. Starrfield and his collaborators will be obtaining CHANDRA 
  observations of V382 Vel and V1494 Aql the week beginning August 7, 2000
  and they will be obtaining HST/STIS observations of Nova LMC 2000 the 
  week of August 21, 2000. Ground based observations are encouraged.
  Observers those who are interested in this campaign, should contact
  with Dr. Starrfield (sumner.starrfield@asu.edu).
						[vsnet-campaign-nova 71]

  BL Lac campaign  (July 17 - August 11)

    Massimo Villata, Gino Tosti, and Enrico Massaro organize an 
  optical campaign on BL Lac contemporaneous with the high-energy 
  campaign involving X-ray and TeV observatories such as BeppoSAX, 
  RXTE, STACEE, CAT, HEGRA.  Their goal is high-density and 
  high-precision coverage, possibly in two optical bands (B and R).
  Observers interested in participating to this optical campaign are
  invited to contact with M. Villata (villata@to.astro.it).
                                                [vsnet-campaign 204]

  NY Ser spectroscopic observations at the Calar Alto Observatory
                (July 08/09 and 09/10)
    D. Nogami noticed their schedule of spectroscopic observations of 
  NY Ser and wrote: "Because it is quite important for us to know the 
  state of NY Ser at our observations as accurately as possible, we would 
  ask observers to make a close monitor of this star for ~1 month from 
  now (this article was posted on June 29)."
    For more information, please see [vsnet-campaign 265], or contact 
  with D. Nogami (daisaku@uni-sw.gwdg.de).
                                                [vsnet-campaign 265]

  V446 Her campaign (throughout this summer)

    Boris T. Gaensicke organize a campaign on the post nova V446 Her (V~18). 
  Their aim is to obtain a *good* contiguous light curve of V446 Her that
  covers 2-3 dwarf nova-like outbursts of the system, in order to compare 
  its outburst characteristics to those of ``normal'' dwarf novae. 
  They invite those of you equipped with a CCD camera to obtain a couple 
  of images of V446 Her per night throughout the next three months, say, 
  until the end of September.
    For more information, please see [vsnet-campaign 325] or contact 
  with Boris T. Gaensicke (boris@uni-sw.gwdg.de).
    In [vsnet-campaign 368].....    
  "The V446 Her campaign from July 7 was started (through the end of 
   September).  But we have received very few observations since then.
   Negative observations, for instance, <17.0, are also useful.
   We strongly encourage observers to contribute to this project.
   Let's clarify the physics of post novae!"
    

*** General information ***

  V2051 Oph
    eclipse ephemeris, see [vsnet-campaign-dn 80]

  XTE J1118+480
    long-term light curves
	http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-image/msg00013.html
		(by V. Simon)
	http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Xray/xtej1118-camp.html
		(by VSNET collaboration team)
 
(This summary is reproduction free.)

Regards,
Makoto Uemura

VSNET Home Page

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