[Aavso-photometry] [cvnet-discussion] RE: AAVSO Special Notice #92: Optical Transient in Canis Minoris

[Lew Cook]

I got 4 hours starting at 0630 before clouds, but oh, man, that moon!

  Lew,
  CBA Pahala
Tom Krajci <tom_krajci at tularosa.net> wrote:
          Tonight I started a second run on this target. However I will probably only
get a short time series because of incoming clouds.
http://www.observatories.hodar.com/

I've got my fingers crossed.

Tom Krajci

-------------------------------------------
Tom Krajci
Cloudcroft, New Mexico
http://overton2.tamu.edu/aset/krajci/

Center for Backyard Astrophysics (CBA)
http://cba.phys.columbia.edu CBA New Mexico

American Association of Variable Star
Observers (AAVSO): KTC http://www.aavso.org/
-------------------------------------------

-----Original Message-----
From: Tom Krajci [mailto:tom_krajci at tularosa.net]
Sent: Tuesday, 2008-January-22 12:11
To: cba-chat at cba.phys.columbia.edu; aavso at aavso.org;
cvnet-discussion at yahoogroups.com
Subject: RE: AAVSO Special Notice #92: Optical Transient in Canis
Minoris

A very crude analysis from (last night's data) of this new CV shows that the
superhump period is approx 0.058 day (84 minutes), and amplitude was approx.
0.1 magnitude.

Weather forecast for the next several days in New Mexico is bad.

Tom Krajci

-------------------------------------------
Tom Krajci
Cloudcroft, New Mexico
http://overton2.tamu.edu/aset/krajci/

Center for Backyard Astrophysics (CBA)
http://cba.phys.columbia.edu CBA New Mexico

American Association of Variable Star
Observers (AAVSO): KTC http://www.aavso.org/
-------------------------------------------

-----Original Message-----
From: cba-chat-bounces at cba.phys.columbia.edu
[mailto:cba-chat-bounces at cba.phys.columbia.edu]On Behalf Of Tom Krajci
Sent: Monday, 2008-January-21 19:33
To: aavso at aavso.org; chat CBA; cvnet-discussion at yahoogroups.com
Subject: Re: (cba:chat) AAVSO Special Notice #92: Optical Transient in
CanisMinoris

I have started an unfiltered time series on this star...casual visual
inspection shows it to be around mag 12.5 unfiltered.

I'll post my findings tomorrow morning.

Tom Krajci

-------------------------------------------
Tom Krajci
Cloudcroft, New Mexico
http://overton2.tamu.edu/aset/krajci/

Center for Backyard Astrophysics (CBA)
http://cba.phys.columbia.edu CBA New Mexico

American Association of Variable Star
Observers (AAVSO): KTC http://www.aavso.org/
-------------------------------------------

-----Original Message-----
From: aavso at aavso.org [mailto:aavso at aavso.org]
Sent: Sunday, 2008-January-20 07:21
To: tom_krajci at tularosa.net
Subject: AAVSO Special Notice #92: Optical Transient in Canis Minoris

AAVSO Special Notice #92

Optical Transient in Canis Minoris
January 20, 2008

H. Naito and S. Narusawa (Nishi-Harima Astronomical Obs., Japan)
announced (vsnet-alert #9382) spectroscopic observations of a new
optical transient, recently announced on the CBAT Unconfirmed
Observations Page, that suggest the object is a dwarf nova. A
check of the DSSII Blue, IR, and Red plates yields a very faint,
blue object at the stated coordinates of the OT, and the object
is present in the USNO-B1, NOMAD, and GSC 2.3.2 catalogs with
B ~19.5, but not in any other catalog. Because the object is
currently at V ~ 12.3, this indicates a large amplitude, and
suggests that this may be a new WZ Sge-type dwarf nova.
Time-series observations are encouraged.

The optical transient is located in Canis Minoris at coordinates

RA: 07 47 27.64 , Dec: +06 50 50.0 (J2000)

and was originally announced by CBAT as an unconfirmed source:

http://cfa-www.harvard.edu/iau/unconf/cbat_unconf.html

A comparison star sequence is not yet available, but charts may
be generated with VSP using the coordinates above:

http://www.aavso.org/observing/charts/vsp/

This special notice was prepared by Matthew Templeton.



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Regards and aloha, Lew
http://www.geocities.com/lcoo/pahala.htm
http://www.geocities.com/lcoo/cbacal.htm