(cba:news) Suspected New Dwarf Nova in Cam (fwd)
Joe Patterson
jop at astro.columbia.edu
Mon Dec 18 07:41:25 EST 2006
Dear CBAers,
This looks like an awfully interesting object, and beautifully placed in
the sky for northern observers. Acquire in the evening, and let 'er rip!
joe
---------- Forwarded message ----------
Date: Sun, 17 Dec 2006 23:19:57 -0000
From: David Boyd <drsboyd at dsl.pipex.com>
Reply-To: cba-chat at cbastro.org
To: cba-chat at cbastro.org, thorsten at partita.dartmouth.edu
Cc: BAAVSS alert <baavss-alert at yahoogroups.com>,
cba-news <cba-news at cbastro.org>, cvnet-outburst at yahoogroups.com
Subject: (cba:chat) Re: (cba:news) Suspected New Dwarf Nova in Cam
Using Astrometrica and USNO-B1.0 I've obtained the following mean position
(with std errors) from 5 of my images taken on 2006 Dec 17 between 18.42 and
18.47UT.
RA 5:57:18.468 ±0.003 Dec 68:32:27.01±0.02
Regards,
David Boyd
----- Original Message ----- From: <thorsten at partita.dartmouth.edu>
To: <cba-chat at cbastro.org>
Cc: "BAAVSS alert" <baavss-alert at yahoogroups.com>; "cba-news"
<cba-news at cbastro.org>; <cvnet-outburst at yahoogroups.com>
Sent: Sunday, December 17, 2006 10:13 PM
Subject: Re: (cba:news) Suspected New Dwarf Nova in Cam
>
> Hello all,
>
> Just a remark -- it would be useful if someone could do astrometry
> on an outburst image, so that the quiescent counterpart can be
> identified with confidence once the object fades. I may be able
> to get some large-telescope images in January to accomplish this.
>
> John Thorstensen
>
> On Sun, 17 Dec 2006, David Boyd wrote:
>
>> I was able to observe this object for 2hrs using unfiltered CCD photometry
>> on a 0.35m SCT before clouds intervened. It showed superhump-like
>> modulations with an amplitude of 0.2 magnitudes and a period, according to
>> Peranso, of 0.052+/-0.007days. The mean magnitude was approx 14.85. It
>> appears to be another UGSU type dwarf nova.
>>
>> Regards,
>> David Boyd
>> West Challow, UK
>>
>>
>> ----- Original Message ----- From: sn2005cs
>> To: cvnet-outburst at yahoogroups.com
>> Sent: Sunday, December 17, 2006 6:31 PM
>> Subject: [cvnet-outburst] Fwd: Suspect on New Dwarf Nova
>>
>>
>> ----------------------------------------------------------
>>
>> Dear colleagues,
>>
>> I obtained V and B magnitudes of this object as follows:
>>
>> object YYYYMMDD(UT) mag code
>> OT_J055718++683226 20061217.62573 14.95V Mhh.VSOLJ
>> OT_J055718++683226 20061217.62839 15.11B Mhh.VSOLJ
>>
>> A USNO B1 star is located close to this object:
>> USNO-B1.0 1585-0088462 RA=05 57 18.45 Dec=+68 32 26.9 B1=19.04
>> R1=19.23
>>
>> A ROSAT X-ray source 1RXS J055722.9+683219 is located at about
>> 0.4 arcmin east from this object.
>>
>> This object seems to be a new dwarf nova.
>>
>> Regards,
>> Hiroyuki Maehara
>>
>> ----------------------------------------------------------
>> ----------------------------------------------------------
>> ------
>>
>> Dear Wolfgang Kloehr,
>>
>> I have taken 60 s exposures (in Ic band) with the 14 inch telescope
>> and confirmed the presence of the object.
>>
>> As you note, the faint counterpart seems to be present in the DSS2
>> red.
>>
>> Regards,
>> Ken'ichi Torii
>>
>> ----------------------------------------------------------
>> ----------------------------------------------------------
>> ------
>>
>>
>> >> Dear List,
>> >>
>> >> i'd like to report a possible new object ~Mag 15.2CR at Ra.:
>> 05:57:18
>> >> Dec.: +68 :32 :26 from 2006-12-16 03:54:58 UT.
>> >> Image and data are here:
>> >> http://www.dsi-astronomie.de/New%20object%20near%20ugc3379.htm
>> >> Image form 2006-12-16 is a composite of 7 images a 21sec at F6.3.
>> Object
>> >> is visible on all.
>> >> The weak pregnator object GSC2.2 N31020007187 is of class 3 = non
>> star.
>> >> http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-info=XML&-out.add=.&-
>> source=I/271/out&GSC2.2===N31020007187
>> >> Till now i only have this image and i would like to ask wether
>> there is
>> >> someone who can take a confirmation of this. The weather here will
>> be bad
>> >> the next days.
>> >> No known minor plantes around this position at this time.
>> >> No known variables in GCVS / VSX at this position.
>> >>
>> >> thanks for your help
>> >>
>> >> regards
>> >> Wolfgang Kloehr
>> >>
>>
>>
>>
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>
> --
> ----------------------------------------------------------------------------
> John R. Thorstensen - Professor and Chair
> Department of Physics and Astronomy
> Dartmouth College
> 6127 Wilder Laboratory
> Hanover, NH 03755
>
> Office: 239 Wilder Hall
> Phone: voice 603-646-2869 FAX 603-646-1446 Hinman box 6127
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