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[vsnet-chat 5343] On UY Cen fading

On UY Cen fading

    According to BAA VSS Circular 112, 3 (J. Toone), UY Cen is reported to
have undergone a deep minimum (mag 10) in 2002 February to March.  Such
a deep fading may have been compared to a RCB-type fading.  Upon knowing
this information, I have checked the reports to VSNET.

  YYYYMMDD(UT)   mag  observer
  20010318.199    85  (Sebastian Otero)
  20010410.000    85  (Sebastian Otero)
  20010415.185    87  (Sebastian Otero)
  20010513.000    88  (Sebastian Otero)
  20010607.000    90  (Sebastian Otero)
  20010628.000    91  (Sebastian Otero)
  20010728.010    90  (Sebastian Otero)
  20010807.981    90  (Sebastian Otero)
  20010820.967    90  (Sebastian Otero)
  20010823.971    90  (Sebastian Otero)
  20020113.312    94  (Sebastian Otero)
  20020202.276    90  (Sebastian Otero)
  20020224.276    88  (Sebastian Otero)
  20020224.280    89  (Cecilia Scalia)
  20020324.212    86  (Sebastian Otero)
  20020401.308    88  (Sebastian Otero)
  20020406.103    86  (Sebastian Otero)
  20020421.031    87  (Sebastian Otero)
  20020421.033    89  (Cecilia Scalia)

   These observation may suggests that the fading(?) already started in
2001, but the depth may be inconsistent with the report in BAA VSS Circular??
Are we referring to a different star, or the object has recently changed its
variation properties??

   Identifications:

GSC7786.2428 131631.78 -444216.0 (2000.0)  8.12 0
USNO0450.15511308 131631.788 -444216.10 (2000.0)  8.1 99.9
IRAS13136-4426 131336.6 -442626 (1950.0)
    F12=52.47  F25=20.89  F60=3.98  F100=1.32 
    VAR= 9 LRS=43
    blue, 11micron (SiC) emission, strength=3
    II: variable star with 'young' O-rich circumstellar shell
131631.9 -444209 (2000.0) CD-44.8539 7.5
131631.4 -444214 (2000.0) IRAS13136-4426 54.820 20.520 4.127 1.324 9% 4(LRS)
131631.4 -444214 (2000.0) SSC13136-4426 54.820 20.520 4.127 1.324
131631.6 -444214 (2000.0) HD115236 SC(Michigan)
131631.6 -444220 (2000.0) GCSS816 10 - - CENUY
131631.8 -444212 (2000.0) UBV_UYCen 6.70 2.73 4.06 .253 .100 - SC N=2 Nm=6 -
131631.8 -444214 (2000.0) SAO224021 99.9 7.1 K5p
131632.0 -444219 (2000.0) FSC13136-4426 55.710 20.700 3.817 1.249
131631.8 -444215 (2000.0) 685HV2 2.87 HIP064778 plx=1.66(1.04) (0.01 0.04) U 6.54-7.11
131631.8 -444215 (2000.0) 702Vu 2.94 TYC7786.2428.1 plx=3.0(6.9) (0.01 0.05)
131631.7 -444215 (2000.0) 703 3.09 TYC2-7786.2428.1 (7.36 0.01) (10.99 0.05)
131631.8 -444214 (2000.0) CENUY SR 9.22 11.2 B - 114.6 - SC
131630.6 -444141 (2000.0) HD115236 30.0 30.0 K5p

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