NOVA OPHUICHI 2004 (V2574 Oph)
Discovered by Akira Takao, Kitakyushu, Japan, discovered on Apr. 14.80
(V=10.9). See IAU Circular 8323.
Localization of the nova (2000.0): RA = 17h38m45.5s - DEC = -23°28'18"
Image of V2574 Oph the 25.06 April 2004
Canon EOS 10D + Canon 200 mm f/2.8 - Stack of 8 x 3 minutes exposure - C. Buil - Castanet Tolosan
April 24.029 UT 2004 Observation (estimated magnitude V=10.6)
Observatory: Castanet Tolosan (France)
Observer: Christian Buil
Instrument: Takahashi FS-128 refractor (5-inch aperture) - MERIS spectrograph (sampling of 2.87 A/pixel) + Audine KAF-0401E CCD
Cumulative exposure time of 52 minutes (stack of 41 two minutes frame)
A raw 2-minutes exposure of V5114 Sgr. The H-alpha line is at right. The intense vertical lines are from the sky pollution (high pressure sodium lamp). This 2D spectrum is colored artificially.
The 2D spectrum after stacking the 41 two-minutes exposures, geometric correction and sky subtraction.
The spectrum is corrected for the instrumental spectral response.
Download ASCII spectra (240404.DAT)
The Ha measured intensity is 9.7 time the continuum at 6660 angstroms. The FWHM of this line is 1420 km/sec +/- 50 km/sec. FWZI (Full Width at Zero Intensity) = about 2780 km/sec +/150 km/sec.
The instrument used
Click on the image for enlarge - MERIS spectrograph See also the "Bareges" spectrograph (ARAS site)
spectra of V2574 Oph for the date April
16.78 UT and April 20.77 UT.
the novae page