[vsnet-alert 9527] Recent activity of symbiotic stars

[Berto Monard]

Hi,

Recent postings refer to activity of FN Sgr and V748 Cen, but there is
more going on amongst the symbiotic (Z And) stars. 

The following lightcurves show definite bright states, possibly a nova
type brightening for one of them: not much is known about most of these
tabled symbiotic stars. 


AS 288 might just be reaching a 'Mira' type max in its long period,
perhaps it's an outburst:

AS 288		2453310.25		14.2	CCD-V		MLF
AS 288		2453429.63		14.2	CCD-V		MLF
AS 288		2453467.60		14.3	CCD-V		MLF
AS 288		2453511.58		14.3	CCD-V		MLF
AS 288		2453524.62		14.4	CCD-V		MLF
AS 288		2453561.48		14.5	CCD-V		MLF
AS 288		2453594.30		14.57	CCD-V		MLF
AS 288		2453629.22		14.7	CCD-V		MLF
AS 288		2453827.55		14.46	CCD-V		MLF
AS 288		2453908.60		14.3	CCD-V		MLF
AS 288		2453975.33		14.14	CCD-V		MLF
AS 288		2454004.35		13.92	CCD-V		MLF
AS 288		2454062.24		13.8	CCD-V		MLF
AS 288		2454160.58		13.47	CCD-V		MLF
AS 288		2454204.65		13.27	CCD-V		MLF
AS 288		2454237.55		13.31	CCD-V		MLF
AS 288		2454319.30		13.1	CCD-V		MLF
AS 288		2454343.24		12.98	CCD-V		MLF


Hen 2-275 has been evolving around 15.2V for a couple of years but is
now brightening steeply: perhaps I missed a steep maximum in the recent
past?

Hen
2-275		2453308.22		15.10	CCD-V		MLF
Hen
2-275		2453411.60		15.10	CCD-V		MLF
Hen
2-275		2453466.61		15.00	CCD-V		MLF
Hen
2-275		2453498.55		15.25	CCD-V		MLF
Hen
2-275		2453524.57		15.22	CCD-V		MLF
Hen
2-275		2453594.24		15.40	CCD-V		MLF
Hen
2-275		2453628.27		15.50	CCD-V		MLF
Hen
2-275		2453826.55		15.50	CCD-V		MLF
Hen
2-275		2453855.58		15.37	CCD-V		MLF
Hen
2-275		2453891.38		15.30	CCD-V		MLF
Hen
2-275		2453975.30		15.50	CCD-V		MLF
Hen
2-275		2454004.35		15.14	CCD-V		MLF
Hen
2-275		2454151.60		15.10	CCD-V		MLF
Hen
2-275		2454213.56		15.47	CCD-V		MLF
Hen
2-275		2454237.52		15.54	CCD-V		MLF
Hen
2-275		2454319.27		14.88	CCD-V		MLF
Hen
2-275		2454343.24		14.30	CCD-V		MLF


a similar scenario for Sa 3-43

Sa
3-43		2453408.61		15.2	CCD-V		MLF
Sa
3-43		2453471.62		15	CCD-V		MLF
Sa
3-43		2453492.45		15	CCD-V		MLF
Sa
3-43		2453525.51		15.05	CCD-V		MLF
Sa
3-43		2453560.25		15.1	CCD-V		MLF
Sa
3-43		2453628.23		15.3	CCD-V		MLF
Sa
3-43		2453826.52		15.2	CCD-V		MLF
Sa
3-43		2453855.56		15.2	CCD-V		MLF
Sa
3-43		2453891.32		15.1	CCD-V		MLF
Sa
3-43		2453975.3		15.2	CCD-V		MLF
Sa
3-43		2454003.26		15.22	CCD-V		MLF
Sa
3-43		2454156.56		15.13	CCD-V		MLF
Sa
3-43		2454213.56		15.2	CCD-V		MLF
Sa
3-43		2454237.51		15.16	CCD-V		MLF
Sa
3-43		2454319.25		14.2	CCD-V		MLF
Sa
3-43		2454343.25		14.05	CCD-V		MLF


The bright state of V919 Sgr was reported earlier: note the BVRI data
of V919 Sgr in its bright state:
 
SGRV919
		2453308.2		13.05	CCD-V		MLF
SGRV919
		2453327.24		12.95	CCD-V		MLF
SGRV919
		2453428.63		13.05	CCD-V		MLF
SGRV919
		2453466.63		13.11	CCD-V		MLF
SGRV919
		2453498.57		13.3	CCD-V		MLF
SGRV919
		2453511.59		13.47	CCD-V		MLF
SGRV919
		2453524.61		13.5	CCD-V		MLF
SGRV919
		2453561.48		13.62	CCD-V		MLF
SGRV919
		2453594.33		13.37	CCD-V		MLF
SGRV919
		2453629.23		13.21	CCD-V		MLF
SGRV919
		2453827.56		12	CCD-V		MLF
SGRV919
		2453855.62		11.97	CCD-V		MLF
SGRV919
		2453908.61		12.08	CCD-V		MLF
SGRV919
		2453936.36		12.24	CCD-V		MLF
SGRV919
		2453975.35		12.42	CCD-V		MLF
SGRV919
		2454003.3		12.55	CCD-V		MLF
SGRV919
		2454062.24		12.96	CCD-V		MLF
SGRV919
		2454237.59		12.75	CCD-V		MLF
SGRV919
		2454319.31		10.8	CCD-V		MLF
SGRV919
		2454343.25		10.78	CCD-V		MLF

SGRV919
		2454319.31		11.34	CCD-B		MLF
SGRV919
		2454319.31		10.29	CCD-R		MLF
SGRV919
		2454319.31		9.44	CCD-I		MLF


Regards,

Berto Monard
CBA Pretoria / Bronberg Observatory