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Thread: Nova V1280 SCORPII has brightened to magnitude 3.7 (naked eye!!!)

  1. #1
    Join Date
    Jun 2004
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    28

    Nova V1280 SCORPII has brightened to magnitude 3.7 (naked eye!!!)

    Nova V1280 SCORPII has brightened to magnitude 3.7 (naked eye!!!)
    R.A. = 16h 57m 41s.0, Decl. =-32d 20m 34s(equinox 2000.0, uncertainty about 30");

    This is just south of Jupiter in the eastern morning sky.

    From IAUC 8807ol

    This nova (cf. IAUC 8803) has brightened greatly in the last
    week. Selected visual estimates (some from H. Yamaoka via VSNET,
    and some sent by E. Waagen, AAVSO): Feb. 8.323 UT, 8.0 (A. Amorim,
    Florianopolis, Brazil); 10.844, 7.5 (K. Kanai, Gunma, Japan);
    11.794, 7.0 (Kanai); 12.326, 6.5 (Amorim); 12.790, 6.2 (Kanai);
    12.86, 6.6 (Y. Sakurai, Mito, Ibaraki-ken, Japan; via S. Nakano);
    13.246, 6.0 (J. Ripero, Madrid, Spain); 14.782, 5.4 (Kanai);
    15.215, 5.2 (Ripero); 15.851, 4.5 (Kanai); 16.212, 4.2 (W. Kriebel,
    Schierling/Walkenstetten, Germany); 16.323, 3.9 (Amorim); 16.231,
    3.8 (P. Schmeer, Bischmisheim, Germany); 16.458, 3.7 (M. Simonsen,
    Imlay City, MI).
    H. Yamaoka, Kyushu University, writes that low-resolution
    spectroscopy obtained by M. Fujii (Ibara, Okayama, Japan) on Feb.
    12.88 and 14.83 UT, and by H. Naito (Nishi-Harima Astronomical
    Observatory) on Feb. 14.86, shows a much bluer continuum than in the
    spectroscopy taken on Feb. 5.87 (cf. IAUC 8803); the new spectra
    resemble the spectrum of an F-type star. Balmer lines (relatively
    weaker than in the Feb. 5 spectrum) show clear P-Cyg profiles
    (expansion velocity about 500 km/s), along with other weak lines.

    From IAUC. 8803

    V1280 SCORPII = NOVA SCORPII 2007
    Reports of apparently independent discoveries of a possible
    nova have been received by the Central Bureau: H. Yamaoka, Kyushu
    University, communicates the discovery of a new object (mag 9.9) by
    Yuji Nakamura (Kameyama, Mie, Japan) on two unfiltered CCD images
    taken on Feb. 4.8624 UT with a 135-mm camera lens, with the
    position of the variable measured to be R.A. = 16h57m41s.0, Decl. =
    -32o20'34" (equinox 2000.0, uncertainty about 30"); nothing was
    detected at this position with the same equipment on Jan. 29.8669
    (limiting mag 12.0) or Feb. 2.8662 (limiting mag 11.0). S. Nakano,
    Sumoto, Japan, reports the discovery by Yukio Sakurai (Mito,
    Ibaraki-ken) of the same star at mag 9.4 on two 10-s CCD exposures
    taken on Feb. 4.854 (correction to time given on CBET 834) using a
    Fuji FinePix S2 Digital Camera (+ Nikon 180-mm f/2.8 lens), the
    position measured to be R.A. = 16h57m40s.91, Decl. = -32o20'36".4;
    nothing is visible on a CCD frame taken by Sakurai on Feb. 2.8.
    Nakano adds that he has measured the variable's position from one
    of Sakurai's images, yielding position end figures 41s.24, 36".5.
    Nakano also writes that K. Kadota has confirmed the variable at mag
    8.9 on an unfiltered CCD image taken on Feb. 5.818 with a 0.25-cm
    f/5 reflector, providing position end figures 41s.20, 35".8.
    H. Naito and S. Narusawa, Nishi-Harima Astronomical
    Observatory (NHAO), report that they obtained a low-dispersion
    spectrum (range 410-670 nm; resolution 1600 at H_alpha) of N Sco
    2007 on Feb. 5.87 UT with the 2.0-m NAYUTA telescope (+ MALLS).
    The spectrum shows a smooth continuum with many lines (H_alpha,
    H_beta, He I 492- and 501.5-nm, and Fe II 516.3-nm) with P-Cyg
    profiles, which suggests that the variable is indeed a classical
    nova caught near maximum light. The FWHM of the H_alpha emission
    is 400 km/s, and its absorption minimum is blueshifted by 480 km/s
    from the emission peak (measured by a Gaussian fitting).
    N. N. Samus, Institute of Astronomy, Russian Academy of
    Sciences, advises the Bureau that the nova reported above has been
    given the designation V1280 Sco.

  2. #2
    Join Date
    Jan 2005
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    2,819
    Saw it this morning.

    A nova--my first. Fricken' WOW!


  3. #3
    Join Date
    Feb 2007
    Posts
    153
    Someone should post some pictures of this, if they haven't already.

  4. #4
    Join Date
    Feb 2007
    Posts
    18
    Got a pic? Sorry, weather's been bad here for sometime. How long is it gonna stay that way anyway?

  5. #5
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    Sep 2003
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    3,882

  6. #6
    Join Date
    Nov 2005
    Posts
    205
    Bad weather, and it's too low to see anyway (I think it doesn't even rise here)...

  7. #7
    Join Date
    Aug 2006
    Posts
    23
    i went out this morning and couldn't see it.

  8. #8
    Join Date
    Feb 2007
    Posts
    1
    Hi all,

    I took a digicam pic of the nova & surroundings this morning (Feb 19.05); see

    http://www.psychohistorian.org/astro...a-scorpii.html

    Regards,
    Auke

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