|
SIMBAD Astronomical Database
Informationen über Brh V28
IBVS No. 5203:
On the variability of V1538 Aql (Brh V17) and
GSC 1123.1704 (Brh V28)
Nachricht von Dr. Klaus Bernhard 16. Januar 2000
Chris Lloyd hat inzwischen eine Datenanalyse unserer Beobachtungen von BeV28
gemacht.
Sein Kommentar:
I have been a bit busy recently but I have managed to look at the data on
BeV28. This is very interesting. I have found what I think is the best
period, which is 0.43613 days. This is one I mentioned before as possible
and with Moschner's data it gives clearly the best fit. The light curve
has two maxima and minima and is probably a W UMa star. I am also sure
that the light curve is variable, the minima do not reproduce exactly, and
this is not errors or a difference between your and Moschner's magnitudes.
We should think about writing these new stars up for IBVS.
Nachricht von Dr. Klaus Bernhard 29. September 1999
K. Bernhard konnte in zwei Nächten einen Helligkeitsabfall von ca. 0.5 mag
beobachten und
vermutet
einen Algol-Stern. Intensive Beobachtungen sind angebracht
um Typ und Elemente zu
bestimmen. Die
Saison für diesen Stern neigt sich langsam
dem Ende zu!
Nachricht von Dr. Klaus Bernhard 25. Oktober 1999
Meine Messungen der letzten Wochen deuten auf eine sehr kurze Periode von
0,5578d hin!
Von: Klaus Bernhard [klaus.bernhard@vpn.at]
Gesendet: 28. Oktober 1999 00:36
Betreff: New variable (BeV28)
Dear colleagues!
I would like to send you observations of a new variable star (BeV28),
which I have discovered in a systematic CCD-based search for new variables.
In each observing run typically 400 images are taken of several survey fields.
The frames are processed automatically.
Instruments:
CCD-camera:Starlight Xpress SX (unfiltered)
Telescope: Celestron-8 (20 cm Schmidt-Cassegrain)
New variable star:
new BeV28 212830.2 N104522 (J2000) 12.7 13.2(CCD)
comments:
BeV28: GSC 1123 1704
Comparison star was for all measurements GSC 1123 1430 (12.8 mag),
which was checked to be constant.
Data analysis was made by Chris Lloyd, UK. His comment:
Very clear series of periods at 1.76 days and its 1-day aliases.
Best period looks like 0.636 days and this one also could be eclipsing,
so the true period could be 1.28 days.
object YYMMDD(UT) mag (CCD) code
BeV28 990909.9118 12.72 BRH.BAV
BeV28 990910.9188 13.19 BRH.BAV
BeV28 990911.9104 12.70 BRH.BAV
BeV28 990913.9028 12.80 BRH.BAV
BeV28 990914.9333 12.69 BRH.BAV
BeV28 990923.8757 12.73 BRH.BAV
BeV28 990924.8750 13.22 BRH.BAV
BeV28 990927.8694 12.77 BRH.BAV
Regards,
Klaus Bernhard
Klaus Bernhard
Kafkaweg 5
A-4030 LINZ
AUSTRIA
e-mail:
klaus.bernhard@vpn.at
| 
