[vsolj-alert 765] Outburst of RXJ1450.5+6403

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

　ということで、RXJ1450.5+6403が14等クラスのアウトバーストで、スーパーア
　ウトバーストと確認されました。

From: "Tonny Vanmunster" <Tonny.Vanmunster@advalvas.be>
Date: Sun, 14 May 2000 21:52:36 -0000
Subject: [vsnet-alert 4834] Rare outburst of RXJ1450.5+6403

Dear colleagues,

I herewith report the detection (unfiltered CCD) of an outburst of =
RXJ1450.5+6403, using the 0.35-m f/6.3 telescope at CBA Belgium =
Observatory. The object is located at 145038.22  +640328.6 (J2000.0) and =
has a listed magnitude range of 16.3 - 17.1.=20

RXJ1450.5+6403 appears in "The Hamburg/RASS Catalogue of optical =
identifications" as an optical counterpart to a RASS source. Further =
identification (as a mag 16.3 object) in USNO : USNO1500.05897283 =
145038.215 +640328.55 (2000.0).
=20
Available observations :

RXJ1450.5+6403 20000510.906 UT  <16.5C  Tonny Vanmunster
RXJ1450.5+6403 20000514.864 UT   14.4C  Tonny Vanmunster
Instrument : 0.35-m f/6.3 SCT and SBIG ST-7 CCD (unfiltered)

I have found *no* further information on previous outbursts of this =
object, so it most likely is a very unknown CV, that is worth following =
closely by time-series photometry. I have started a CCD run on =
RXJ1450.5+6403 some time ago, and hope to announce first results =
shortly.

Best regards,
Tonny Vanmunster
CBA Belgium Observatory

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Subject: [vsnet-alert 4838] RXJ1450.5+6403 is a new SU UMa type variable !

Dear colleagues,

An intermediate inspection of the real-time developing light curve of =
RXJ1450.5+6403 (see outburst announcement earlier tonight in VSNET-ALET =
4834) clearly shows the presence of superhumps, thus establishing this =
object as a new member of the SU UMa type of cataclysmic variables.

Some further details : observations are being made using a 0.35-m f/6.3 =
telescope and unfiltered CCD at CBA Belgium Observatory, on May 14/15, =
2000. Period determination is done using PDM, and yields a (preliminary) =
superhump period of 0.0617d +/- 0.0003d. Amplitude is 0.32 mag.

The object is still increasing in brightness.

Best regards,
Tonny Vanmunster
CBA Belgium Observatory

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