NOVA SAGITTARII 2008 (V5579 Sagittarii)

Nova Sagittarii 2008 (V5579 Sgr) discovered (at mag 8.4) on two 30-s unfiltered CCD survey frames taken on Apr. 18.784 UT by K. Nishiyama (Kurume, Fukuoka-ken, Japan) and F. Kabashima (Miyaki-cho, Saga-ken, Japan) using a 105-mm f/5.6 camera lens (limiting mag about 12.6). See IAUC 8937. Position R.A. = 18h05m58s.88, Decl. = -27°13'56".0 (equinox 2000.0).

The setup used. Left, at the entrance of the fiber link: a 0.2 m telescope.
At the output of the fiber link: the compact LISA spectrograph
(note the Canon 85 mm f/1.8 camera lens, and at the top, an Audine CCD camera.

April 23.089 UT, 2008 observation (at V=6.5)
Observatory: Castanet Tolosan (France) - IAU959
Observer: Christian Buil
Instrument: 0.2 meter telescope (Takahashi CN-212) + LISA spectrograph (R=1000) - see technical details here + fiber link + Audine KAF1602ME CCD camera - Exposure 240 s (limited by the arrival of clouds). The instrumental response is corrected.

The spectrum can be downloaded here 20080423_089.DAT

April 24.106 UT, 2008 observation (at V=6.8)
Observatory: Castanet Tolosan (France) - IAU959
Observer: Christian Buil
Instrument: 0.2 meter telescope (Takahashi CN-212) + LISA spectrograph (R=1000) - see technical details here + fiber link + Audine KAF1602ME CCD camera - Exposure 8 x 300 s. The instrumental response is corrected.

The spectrum can be downloaded here 20080424_106.DAT

April 25.093 UT, 2008 observation (at V=6.9)
Observatory: Castanet Tolosan (France) - IAU959
Observer: Christian Buil
Instrument: 0.2 meter telescope (Takahashi CN-212) + LISA spectrograph (R=1000) - see technical details here + fiber link + Audine KAF1602E CCD camera - Exposure 5 x 300 s. The instrumental response is corrected. Weather: hazy sky.

The spectrum can be downloaded here 20080425_093.DAT 
Note fast evolution feature at the level of Na lines.

April 26.058 UT, 2008 observation (at V=7.2)
Observatory: Castanet Tolosan (France) - IAU959
Observer: Christian Buil
Instrument: 0.2 meter telescope (Takahashi CN-212) + LISA spectrograph (R=1000) - see technical details here + fiber link + Audine KAF1602E CCD camera - Exposure 5 x 300 s. The instrumental response is corrected. Wheater: clear sky.

The spectrum can be downloaded here 20080426_058.DAT
Hbeta come probably to be visible in emission.
 

April 27.097 UT, 2008 observation (at V=7.5 - source AAVSO)
Observatory: Castanet Tolosan (France) - IAU959
Observer: Christian Buil
Instrument: 0.2 meter telescope (Takahashi CN-212) + LISA spectrograph (R=1000) - see technical details here + fiber link + Audine KAF1602E CCD camera - Exposure 8 x 300 s. The instrumental response is corrected. Wheater: very hazy sky.

The spectrum can be downloaded here 20080427_097.DAT 

April 29.107 UT, 2008 observation (at V=8.7 - source AAVSO)
Observatory: Castanet Tolosan (France) - IAU959
Observer: Christian Buil
Instrument: 0.2 meter telescope (Takahashi CN-212) + echelle spectrograph (R=4000) - see technical details here + fiber link + Audine KAF1602E CCD camera - Exposure 9 x 300 s. The instrumental response is corrected.

The spectrum can be downloaded here 20080429_107.DAT

Echellogram of nova Sgr 2008 - April 29.12, 2008 UT.

 Time evolution

The each successive spectra are shifted by 0.5 unit along intensity axis for clarity.