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ASASSN-18fv: probable nova (10 mag or brighter) in Carina

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SPK
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ASASSN-18fv: probable nova (10 mag or brighter) in Carina

ASASSN-18fv (N:)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=611993

RA 10h36m13.7s, DEC -59°35'53.9" (J200.0)
Discoverer: All Sky Automated Survey for SuperNovae (ASAS-SN)

"ASAS-SN Discovery of a Possible, Very Bright Galactic Nova ASASSN-18fv" (ATel #11454): http://www.astronomerstelegram.org/?read=11454

ASAS.SN images: http://www.astronomy.ohio-state.edu/asassn/followup/asassn-18av.jpg
ASAS-SN lightcurve: https://asas-sn.osu.edu/light_curves/d4516005-ae77-4260-accc-2ce6382cb91d

ASASSN-18fv 20180315.34 <170V ASN
ASASSN-18fv 20180316.32 104V ASN
ASASSN-18fv 20180320.32 >100V ASN

Spectroscopy and precise astrometry are urgently required.

Sebastián Otero's earlier thread here: https://www.aavso.org/bright-nova-carina

Clear skies,
Patrick

Earlier thread here: https://www.aavso.org/bright-nova-carina

SPK
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Follow-up B and V photometry (ATel #11457)

2018 March 21.47 UT: V= 6.62, B= 7.19 mag

M. J. I. Brown, J. Upjohn, E. Rol, A. Obradovic, D. K. Galloway, K. Ackley, J. Davies, C. Lane, S. Olofsson, N. Reader (Monash University): "Photometry and brightening of Galactic transient ASASSN-18fv" (ATel #11457)
http://www.astronomerstelegram.org/?read=11457

SPK
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ASASSN-18fv is a classical nova in the iron curtain phase

Paul Luckas (International Centre for Radio Astronomy Research, University of Western Australia): "Spectroscopic Observations of ASASSN-18fv as a Classical Nova in the Iron Curtain Phase" (ATel #11460)
http://www.astronomerstelegram.org/?read=11460

weo
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AAVSO Alert Notice on ASASSN-18fv

AAVSO Alert Notice 626 announces and reports on ASASSN-18fv, the bright nova discovered in Carina. Please see the notice for details and observing recommendations.

Many thanks, and Good observing,

Elizabeth Waagen, AAVSO HQ

Sebastian Otero
Sebastian Otero's picture
6.3 tonight

It is not an easy object to observe in 7x50 binoculars due to the proximity of the 51 comparison star.
But it seems it is still getting brighter.

Cheers,
Sebastian

KBJ
KBJ's picture
ASASSN-18fv spectrum

I agree Sebastian, it is not an object for small binoculars.  I took a low-res optical spectrum last night (21 Mar) and it appeared featureless, with no obvious emissions or absorptions. It's a hard one to get a clear spectrum on at the scale I shoot because of the proximity of the bright star (and other bright stars in the vicinity).  Estimate roughly mag 6.5 on 21.635 March 2018 UT.  I've attached a widefield image showing the Eta Carinae Nebula - pretty part of the sky!

Cheers -

Rob Kaufman  KBJ

 

FRF
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Binocular chart for ASASSN-18fv

Binocular chart for ASASSN-18fv can be downloaded from VSP:
http://bit.ly/2GfylrY

Sebastian Otero
Sebastian Otero's picture
The 9.4 mag. red companion

A friend made me realize that I am not resolving the nova and the 9.4 red companion (which is slightly variable) in my visual observations made with 7x50 binoculars. I am applying a correction to subtract the light of that star now.
It amounts to 0.06 at mag. 6.3 and 0.09 at mag. 6.6.
Posted here because others may be also suffering from the same issue.

Cheers,
Sebastian

 

TCB168
TCB168's picture
Spectrum of the nova

I took a high resolution spectrum tonight that clearly shows Ha emission and P Cyg profie.

Terry

Prabhakaran A
photograph of the nova captured on 20.3.18 6.12 UTC

Wasn't aware of it when I captured it then later I checked the images to confirm it.

File upload: 
TCB168
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More spectra

Quite a significant change in 24 hours.

 

Meire Ruiz
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ASASSN-18FV - 10 March 2018 - Brazil

Increasing brightness.

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