Nova in southern sky ?
The Astronomer's Telegram http://www.astronomerstelegram.org
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ATEL #10772 ATEL #10772
Title: ASAS-SN Discovery of a Possible Bright Galactic Nova ASASSN-17mt
Author: K. Z. Stanek, C. S. Kochanek, J. V. Shields, T. A. Thompson
(OSU), L. Chomiuk, J. Strader (MSU), T. W.-S. Holoien, B. J. Shappee
(Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), Subo
Dong (KIAA-PKU)
Queries: stanek.32@osu.edu
Posted: 24 Sep 2017; 18:50 UT
Subjects:Optical, Nova
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN,
<a href="http://adsabs.harvard.edu/%61bs/2014ApJ ... S">Shappee
et al. 2014</a>), using data from the quadruple 14-cm "Cassius"
telescope in CTIO, Chile, we detect a bright, new transient source,
possibly a classical nova (could also be a bright CV), near the
Galactic plane
Object RA (J2000) DEC (J2000) Gal l (deg) Gal b (deg)
Disc. UT Date Disc. V mag
ASASSN-17mt 08:50:29.576 -47:45:28.56 267.191 -2.319
2017-09-24.39 11.3
ASASSN-17mt was discovered in images obtained on UT 2017-09-24.39
V~11.3, and it is also detected at UT 2017-09-23.40 at V~11.3. There
was an ~80-day seasonal gap before these observations, so the nova
candidate could have peaked already. We do not detect (V>16.9) this
object in subtracted images taken on UT 2017-07-07.95 and before.
Using <a href=https://asas-sn.osu.edu/>ASAS-SN Sky Patrol</a>
public all-sky light curve interface (<a
href=http://adsabs.harvard.edu/abs/2017PASP. ... K>Kochanek et
al. 2017)</A>, we have retrieved aperture photometry time series at
the location of ASASSN-17mt, and the resulting light curve can be seen
<a href=https://asas-sn.osu.edu/light_curves/9c ... 97>here</a>.
No previous outbursts or variability are detected at the position of
ASASSN-17mt since ASAS-SN started observing this location in February
2016.
Follow-up observations, especially spectroscopy, are strongly encouraged.
We thank Las Cumbres Observatory and its staff for their continued
support of ASAS-SN. ASAS-SN is funded in part by the Gordon and Betty
Moore Foundation through grant GBMF5490 to the Ohio State University,
NSF grant AST-1515927, the Mt. Cuba Astronomical Foundation, the
Center for Cosmology and AstroParticle Physics (CCAPP) at OSU, and the
Chinese Academy of Sciences South America Center for Astronomy
(CASSACA). Happy Birthday to MtS.
Nova ASASSN-17mt ?
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Nova ASASSN-17mt ?
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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Re: Nova ASASSN-17mt ?
Nova confirmed. A classical nova in the Fe Curtain stage. ATel courtesy of Steve here: http://www.astronomerstelegram.org/?read=10795
Paul
Paul
Last edited by Paul Luckas on Fri Oct 06, 2017 6:36 am, edited 2 times in total.
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Re: Nova ASASSN-17mt ?
Congratulation Paul for this confirmation and the Atel !!!
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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Re: Nova ASASSN-17mt ?
Félicitations, Paul !
The data base is updated with a new page:
http://www.astrosurf.com/aras/Aras_Data ... el2017.htm
21th nova
All the best,
François
The data base is updated with a new page:
http://www.astrosurf.com/aras/Aras_Data ... el2017.htm
21th nova
All the best,
François
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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- Posts: 101
- Joined: Tue Jun 24, 2014 5:08 pm
- Location: Perth, Western Australia
Re: Nova ASASSN-17mt ?
A quick screen shot of ASASSN-17mt, taken a week after the confirmation spectra. Given this target's position low in the eastern sky before dawn, and the fact that 17mt is likely to be a slow developing classical nova, this will probably be the last spectrum (from me at least).
Paul
Paul