[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]
AG Draconis in outburst - photometry update no. 2
- To: "varstars@lists.funet.fi"@gollum.uio.no
- Subject: AG Draconis in outburst - photometry update no. 2
- Cc: GRANSLO@gollum.uio.no
0010
0020 OUTBURST OF AG DRACONIS --- PHOTOMETRY UPDATE NO. 2 (1994/06/20)
0030
0040 AG Dra [ZAND] Magn.: 8.9 p - 11.8 p Spec.: KIIIep
0050 R.A. = 16h 01m 41s.0 Decl. = +66d 48' 09" (J2000.0)
0060
0070 Other identifications: AG Dra = SAO 16931 = BD +67 922 = AGK3 +66 715.
0080 Orbital ephemeris by Meinunger (1979): Max(U) = JD 243 8900 + 554 E.
0090 Variability was discovered by E. M. Janssen and A. N. Vyssotsky (1943).
0190
0200 The data were taken from the General Catalogue of Variable Stars,
0210 4th edition (P. N. Kholopov et al., 1985) and S. J. Kenyon's book
0220 "The Symbiotic Stars" (1986). Kenyon's book also gives summaries of
0230 photometric, spectroscopic and other observations of AG Draconis and
0240 other well-studied symbiotic systems.
0290
0300 This report contains available photometric observations since April 1.
0310 The observations indicate that this symbiotic variable has entered a
0320 bright outburst, the first major outburst since 1980. According to
0330 observations compiled by the French variable star organisation AFOEV
0340 the star rose from mv = 10 in 1980 to a maximum at mv = 8.3 (near
0350 JD 244 4600) over a period of four months. After a fade to mv = 9.3 the
0360 star rose to a second maximum at mv = 8.2 (near JD 244 4950) before
0370 slowly declining to its normal brightness in 1983. There were also minor
0380 outbursts in 1985 (around JD 244 6150 at mv = 9.0), 1986 (JD 244 6500,
0390 mv = 9.0) and 1989 (JD 244 7700, mv = 9.3). The current outburst started
0400 at the end of May and it has now brightened by about 1.5 magnitudes.
0410 Photometric and spectroscopic observations are urgently needed!
0420
0430 New entries since Update No. 1 (1994/06/16) are marked with an asterisk
0440 (*), revisions are labelled with a cross (#).
0490
0500 #Sequences [SEQ]:
0510 AC AAVSO preliminary chart (sequence by Tsesevich)
0590
0600 #Magnitude systems [MS]:
0610 mv Visual
0690
0700 Sources:
0710 VSOLJ Variable Star Observers League in Japan (VSOLJ)
0720 c/o Taichi Kato
0730 NAS.VSS Norwegian Astronomical Society - Variable Star Section
0740 c/o Bjorn H. Granslo (granslo@argo.uio.no)
0750 SAAF SAAF, Svensk AmatorAstronomisk Forening (Sweden)
0760 c/o Hans Bengtsson (hanben@saaf.se)
0770 Mail(poy) Gary Poyner (gp@starlink.space-research.birmingham.ac.uk)
0780 Mail(jpz) Jochen Pietz (jpietz@astro.uni-bonn.de)
0790 HAA/VSS Hungarian Astronomical Association - Variable Star Section
0800 c/o Attila Mizser (h697kon@huella.bitnet)
0810 *AAM Agrupacion Astronomica de Madrid (Spain)
0820 c/o Jose Ripero (fax)
0830 *VVS-Bel Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren
0840 (Belgium), c/o Paul Van Cauteren (73064.1123@compuserve.com)
0850 *Mail(scp) Patrick Schmeer (extpasc@rz.uni-sb.de)
0970
0980 Time system is year, number of month and date with decimals in U.T.
0990
1000---------------------------------------------------------------------------
1010 YYYY+
1020 MM DD.DDD MAGN MS SEQ OBSERVER NOTES SOURCE
1030---------------------------------------------------------------------------
1994 04 03.577 9.9 mv Takenaka, Y. 20.3-cm SCT VSOLJ
1994 04 05.906 10.1 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 04 06.003 9.8 mv Westlund, M. 20.3-cm SCT SAAF
1994 04 08.07 9.9 mv AC Granslo, B. H. 20.3-cm SCT (80x) NAS.VSS
1994 04 08.96 9.8 mv Westlund, M. 20.3-cm SCT SAAF
1994 04 11.95 9.9 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 04 12.88 9.7 mv Westlund, M. 20.3-cm SCT SAAF
1994 04 12.92 9.9 mv AC Bengtsson, H. 15 -cm refl. SAAF
1994 04 13.95 9.9 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 04 14.909 10.0 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 04 17.994 9.8 mv Poyner, G. 20 -cm refl. Mail(poy)
1994 04 18.00 9.9 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 04 18.865 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 04 28.572 9.7 mv Takahashi, S. VSOLJ
1994 04 28.936 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 01.002 9.8 mv Poyner, G. 40 -cm refl. Mail(poy)
1994 05 01.956 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 02.918 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 04.03 9.9 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 05 06.497 10.1 mv Takenaka, Y. 20 -cm SCT VSOLJ
1994 05 07.963 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 09.97 9.9 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 05 11.896 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 11.97 9.9 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 05 13.865 10.1 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 13.9 9.8 mv Zajacz, G. 6.3-cm refr. HAA/VSS
1994 05 14.93 9.9 mv AC Bengtsson, H. 15 -cm refl. SAAF
1994 05 16.615 9.6 mv Shioi, H. 10 -cm refl. VSOLJ
1994 05 15.920 10.0 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 17.901 10.0 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 19.561 10.1 mv Takenaka, Y. 20.3-cm SCT VSOLJ
1994 05 19.94 10.0 mv AC Bengtsson, H. 15 -cm refl. SAAF
1994 05 20.00 9.9 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 05 21.988 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 23.909 9.9 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 25.911 9.7 mv AC *Ripero, J. 33.5-cm refl. (165x) AAM
1994 05 26.99 9.8 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 05 28.910 9.7 mv AC *Ripero, J. 33.5-cm refl. (165x) AAM
1994 05 28.94 9.6 mv AC Bengtsson, H. 15 -cm refl. SAAF
1994 05 30.01 9.6 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 05 30.874 9.8 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 31.009 9.3 mv Poyner, G. 20 -cm refl. Mail(poy)
1994 05 31.886 9.7 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 05 31.95 9.4 mv AC Bengtsson, H. 15- cm refl. SAAF
1994 06 01.900 9.3 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 06 02.904 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 02.944 9.3 mv AC Pietz, J. 20.3-cm SCT Mail(jpz)
1994 06 02.99 9.3 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 06 03.660 9.7 mv Takenaka, Y. 20.3-cm SCT VSOLJ
1994 06 03.695 9.1 mv Watanabe, Y. 10 -cm Bino. (20x) VSOLJ
1994 06 03.943 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 04.96 9.3 mv AC Granslo, B. H. 20.3-cm SCT (123x) NAS.VSS
1994 06 04.989 9.3 mv Poyner, G. 40 -cm refl. Mail(poy)
1994 06 05.010 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 06.910 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 09.901 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 10.957 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 11.978 9.3 mv Poyner, G. 22 -cm refl. Mail(poy)
1994 06 12.898 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 13.88 8.7 mv Szentasko, L. 33.4-cm refl.? HAA/VSS
1994 06 13.919 9.5 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 14.625 8.4 mv #Takenaka, Y. 7.5-cm refr. (30x) VSOLJ
1994 06 14.974 9.3 mv Poyner, G. 22 -cm refl. Mail(poy)
1994 06 15.060 8.6 mv *Diepvens, A. 15 -cm refr. VVS-Bel
1994 06 15.78 8.6 mv Mizser, A. 6 -cm Bino. (20x) HAA/VSS
1994 06 15.885 9.1 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 17.504 8.6 mv *Watanabe, Y. 10 -cm Bino. (20x) VSOLJ
1994 06 17.95 8.3 mv *Kiss, L. 10 -cm refl.? HAA/VSS
1994 06 18.896 9.1 mv AC *Ripero, J. 33.5-cm refl. (125x) AAM
1994 06 19.040 8.8 mv *Vanmunster, T. 35 -cm f/5 refl. VVS-Bel
1994 06 19.094 8.5 mv *Schmeer, P. 20.3-cm SCT Mail(scp)
1994 06 19.89 8.8 mv AC *Pujol, F. 26 -cm refl. (80x) AAM
1994 06 19.899 8.9 mv AC *Ripero, J. 33.5-cm refl. (75x) AAM
1994 06 19.927 9.1 mv AC *Ripero, J. 33.5-cm refl. (75x) AAM
1994 06 19.97 8.4 mv AC *Granslo, B. H. 20.3-cm SCT (80x) NAS.VSS
2960
2970---------------------------------------------------------------------------
2980
5000 +++ List of Observers +++
5090
5100 VSOLJ
5110 (Y. Takenaka, Kyoto, Japan); (S. Takahashi, Shiga, Japan);
5120 (H. Shioi, Chiba, Japan); (Y. Watanabe, Kanagawa, Japan)
5190
5200 Mail(jpz)
5210 (Jochen Pietz, Germany)
5290
5300 SAAF
5310 (M. Westlund, Uppsala, Sweden); (H. Bengtsson, Hisings Backa, Sweden)
5390
5400 NAS.VSS
5410 (B. H. Granslo, Fjellhamar, Norway)
5490
5500 Mail(poy)
5510 (G. Poyner, Birmingham, England)
5590
5600 HAA/VSS
5610 (G. Zajacz, Debrecen, Hungary); (L. Szentasko, Veresegyhaz, Hungary);
5620 *(A. Miszer, Budapest, Hungary); (L. Kiss, Szeged, Hungary)
5690
5700 AAM
5710 *(J. Ripero, Rivas Vaciamadrid, Spain); (F. Pujol, Spain)
5790
5800 VVS-Bel
5810 *(A. Diepvens, Balen, Belgium); (T. Vanmunster, Landen, Belgium)
5890
5900 Mail(scp)
5910 *(P. Schmeer, Bischmisheim, Germany)
9790
9800 (( Acknowledgements ))
9820 In compiling these updates, we would like to thank organizations and
9830 individuals from all over the world for their efforts in supplying
9840 vital observations of this variable star!!
9890
9900 Compiled by Bjorn H. Granslo (NAS.VSS) and Yasuto Takenaka (VSOLJ)
9940
9950 ----
9960 Norwegian Astronomical Society - Variable Star Section
9970 Bjorn H. Granslo (bgranslo@astro.uio.no)
9980 Variable Star Observers League in Japan ( = VSOLJ )
9990 Yasuto Takenaka (KFA02524@NiftyServe.or.jp)