Coverage of Nova LMC 1996 (OGLE-2018-NOVA-01) outburst needed now

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
回覆文章
PTS
夸克星
文章: 6077
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

Coverage of Nova LMC 1996 (OGLE-2018-NOVA-01) outburst needed now

文章 PTS » 週四 15 3月, 2018 08:47

AAVSO Alert Notice 620

Coverage of Nova LMC 1996 (OGLE-2018-NOVA-01) outburst needed now

March 14, 2018: Dr. Frederick Walter (Stoney Brook University) has requested AAVSO observers, particularly those in South Africa, Australia, and New Zealand, to monitor the current outburst of the recurrent nova Nova LMC 1996 = OGLE-2018-NOVA-01.

The progenitor of this nova has eclipses every 2.85 days. Observations of the current outburst indicate that the eclipse appears to be out of phase. To confirm this, optical photometry is needed urgently, beginning immediately.

Dr. Walter writes: "Nightly observations for the [next] month or two [through 2018 May 15] would be most useful, since it's only up for a few hours at the start of the night. V is fine - in fact, a long time series in one band is preferable to a mixture. However, if [an observer] has the filters, a BVRI sequence each night would be better than B alone (I'm getting BVRIJHK from Chile). And if possible, sitting on it for a couple of hours when it is eclipsing would be useful. But we do not know the ephemeris well yet - just the period (2.85 days)."

The LMC is not very well placed at present for observations from Chile, so observers in South Africa, Australia, and New Zealand are urged to observe the nova as it declines. The current outburst is only the second one detected in Nova LMC 1996 (P. Mroz and A. Udalski on behalf of the OGLE team, (ATel #11384). Spectroscopy by Walter shows the nova is an optically thin He-N nova (ATel #11390).

L. Chomiuk et al. (ATel #11392) report that ASAS-SN monitoring of the LMC shows the present outburst was undetected down to <16.3 V before 2018 February 25. On 2018 February 25.16 UT, it was in outburst at V = 11.0 mag.

Coordinates (2000.0): R.A. 05 13 32.71 Dec. -68 38 00.4

Charts with a comparison star sequence for Nova LMC 1996 may be plotted using the AAVSO Variable Star Plotter (VSP). A finder chart showing the nova (but without comparison stars) prepared by Dr. Walter is available at:
http://www.astro.sunysb.edu/fwalter/SMA ... c1996.html

Please submit observations to the AAVSO International Database using the name NOVA LMC 1996.

This observing campaign is being followed on the AAVSO Campaigns and Observing Reports online forum at: https://www.aavso.org/nova-lmc-1996-observations-2018

This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.
----------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
https://www.aavso.org/webobs

ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

An Alert Notice archive is available at the following URL:
https://www.aavso.org/aavso-alert-notic ... iscoveries

Subscribing and Unsubscribing may be done at the following URL:
https://www.aavso.org/aavso-alert-notice-subscribe

-------------------------------------------------

回覆文章

回到「業餘天文研究專區 Amateur Astronomers' Research Area」

誰在線上

正在瀏覽這個版面的使用者:沒有註冊會員 和 1 位訪客