[vsnet-alert 11678] Re: New transient J062657.68+242906.8

[Ondrej Pejcha]

Hello,

We observed this object on 19 Nov 2009 11:30 UTC with the MDM 2.4m
telescope and CCDS spectrograph. We used 350 l/mm grating and 1.5"
slit that gives resolution of about 5 Angstroms. We covered wavelength
range 3800-6700 Angstroms. The blue part of the spectrum shows broad
Balmer absorption lines with a narrow emission component in the
center. This is similar to dwarf novae in outburst, as seen eg in Fig.
5 of Hessman et al. (1984).

The raw spectra can be viewed at
http://www.astronomy.ohio-state.edu/~pejcha/vargem/ot_blue.png
http://www.astronomy.ohio-state.edu/~pejcha/vargem/ot_red.png

This report was submitted also to CBAT.

Best regards,

Ondrej Pejcha



2009/11/18 Korotkiy Stas <planet171 at yandex.ru>:
> Timur Kryachko (Russia) report the new object (mag approximately 16) on the 13 unfiltered images with
> exposition 300 sec (lim mag 21) taken Nov. 10, 11 and 12, 2009 with a Takahashi FRC-300 30-cm f/7.8
> telescope (+ Apogee Alta U9000 CCD camera) at KSU Astrotel Observatory (Karachay-Cherkessia, Russia).
> The object was found by blinking with DSS2 R-photographic plate. All archival DSS and 2MASS photographic plates
> shows this object fainter than 19-20 mag, except DSS1 R and B plates.
> The new object is located at R.A. = 06h26m57s.68 +/- 0.5, Decl. = +24d29m06s.8 +/- 0.5 (equinox 2000.0).
> On the DDS1 consecutive B and R images is clearly visible that object is very blue.
> The object shows rather fast variability this days. Discovery image:
> <http://www.makhaon.com/_files/transient.jpg>
>
> Magnitude variability table:
>
> JD mag
>
> 2455146.381076 16.24 CR
> 2455146.384711 16.20 CR
> 2455146.388657 16.18 CR
> 2455146.392558 16.18 CR
> 2455146.396481 16.18 CR
>
> 2455147.461146 15.72 CR
> 2455147.465069 15.77 CR
> 2455147.468924 15.74 CR
> 2455147.472836 15.77 CR
> 2455147.476736 15.78 CR
>
> 2455148.455694 15.90 CR
> 2455148.459491 15.95 CR
> 2455148.463437 15.92 CR
>
> New magnitude estimation of new transient: 06h26m57s.68, +24d29m06s.8.
> The object remains bright 7 days.
>
> JD mag
>
> 2455153.415972 16.25 СR
> 2455153.419769 16.27 CR
> 2455153.423692 16.28 CR
> 2455153.427604 16.30 CR
> 2455153.431505 16.31 CR
>