SDSS J153817.35+512338.0 obs crucial now and DT Oct is next

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
文章: 7696
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

SDSS J153817.35+512338.0 obs crucial now and DT Oct is next

文章 PTS » 週二 14 5月, 2013 07:17

AAVSO Special Notice #353

SDSS J153817.35+512338.0 obs crucial now and DT Oct is next
May 13, 2013

Further to AAVSO Alert Notice 471
( and AAVSO Special
Notice #351 (,
HST/COS is scheduled to observe the dwarf nova SDSS

SDSS J153817.35+512338.0 2013 May 16 22:44:06 through May 17 02:14:05 UT

The HST team will be making a final decision on observing SDSS
J153817.35+512338.0 based on the observations of May 13/14 and
14/15, and observations from the following night will also be
essential. Close monitoring of 1RXS J105010.3-140431 through May
18 is requested. SDSS J153817.35+512338.0 is V=18.6 at minimum
and its magnitude at maximum is unknown.

After SDSS J153817.35+512338.0, the next target will be the SU
UMa-type dwarf nova DT Oct:

DT Oct 2013 May 23 23:31:07 through May 24 02:05:03 UT

This date is revised from the preliminary date given in AAVSO
Special Notice #351. Giving SDSS J153817.35+512338.0 highest
priority, please also monitor DT Oct; close monitoring May 17
through 25 is essential. DT Oct is V=16.5 at minimum and V=11.8
at maximum.

As instructed in AAVSO Alert Notice 471, for CCD observers,
simultaneous photometry [shortly before, during, and after the
HST observations] would be ideal. For the magnitude estimates, a
nightly V measurement from now through the HST observations and
a day beyond would be best. If positive visual observations are
possible, they are welcome, as are visual fainter-than
observations fainter than magnitude 15.0.

Coordinates (2000.0)
SDSS J153817.35+512338.0 R.A. 15 38 17.31 Dec. +51 23 38.0
DT Oct R.A. 18 40 52.31 Dec. -83 43 10.0

Charts may be created using the AAVSO Variable Star Plotter

Please report observations as soon as possible to the AAVSO
International Database using the names SDSS J153817.35+512338.0
and DT Oct, respectively. If an outburst is detected, please
report observations immediately. Many thanks!

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.


Information on submitting observations to the AAVSO may be found at:


A Special Notice archive is available at the following URL:

Subscribing and Unsubscribing may be done at the following URL: ... ialnotices


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


正在瀏覽這個版面的使用者:沒有註冊會員 和 1 位訪客