V407 Cyg

 

See also the ARAS collective compilation

Very bright outburst of symbiotic star V407 Cyg. This outburst was discovered independently by the team of K. Nishiyama (Fukuoka, Japan) and F. Kabashima (Saga, Japan), and by T. Kojima (Tsumagoi, Agatsuma-gun, Gunma-ken, Japan). Nishiyama and Kabashima observed the star at an unfiltered magnitude of 6.8 on 2010 March 10.813 (JD 2455266.313) and magnitude 6.9 on 2010 March 10.814 (2455266.814). Kojima observed the star at around magnitude 7 on two images taken using a Canon EOS 40D (CBET 2199). The spectra exhibiting spectral features clearly indicating a classical nova of the He/N type (see CBET 2204). R.A. = 21h02m09s.85, Decl. = +45°46'10'33.0" (equinox 2000.0).

Setup for spectroscopic observation: Celestron 11 telescope (0.28-m diameter) + eShel spectrograph (échelle spectrographe - resolution power R=11000 - 0.1 A/pixel spectral sample) - click here for technical details about échelle eShel spectrograph + QSI532 CCD camera (6.8 microns pixel).
Observatory: Castanet-Tolosan (France)
Observer: Christian Buil

March 14.238, 2010 observation

V magnitude near 8.3.
Exposure: 11 x 600 sec.
Ha measured FWZI = 5900 km/s
Ha peak intensity relative to continuum (continuum normalized between 6460 A and 6470 A) : 116

Download v407cyg_20100314_238.dat


Full spectrum.


Faint features.


Detail of Ha region. Note similarity with RS Oph 2006 outburst.


Detail of Hb line.


Detail of Na D1-D1 lines. Note the double lined structure.


Detail of 5120 A - 5370 A region.

March 16.143, 2010 observation

V magnitude near 8.5.
Exposure: 10 x 600 sec.
Ha peak intensity relative to continuum (continuum normalized between 6460 A and 6470 A) : 162

Download v407cyg_20100316_143.dat

 


Full spectrum.


Faint features.


Detail of Ha region. Note similarity with RS Oph 2006 outburst.


Detail of Hb line.


Detail of Na D1-D1 lines. Note the double lined structure.


Detail of 5120 A - 5370 A region.

March 23.129, 2010 observation

V magnitude near 9.5.
Exposure: 7 x 600 sec.
Ha peak intensity relative to continuum (continuum normalized between 6460 A and 6470 A) : 230

Download v407cyg_20100323_129.dat

 


Full spectrum.


Faint features.


Detail of Ha region. Note similarity with RS Oph 2006 outburst.


Detail of Hb line.


Detail of Na D1-D1 lines. Note the double lined structure.


Detail of 5120 A - 5370 A region.

April 5.142, 2010 observation

V magnitude near 9.8 (source AAVSO).
Exposure: 8 x 600 sec.
Ha peak intensity relative to continuum (continuum normalized between 6460 A and 6470 A) : 250

Download v407cyg_20100404_142.dat


Full spectrum.


Faint features.


Detail of Ha region. Note similarity with RS Oph 2006 outburst.


Detail of Hb line.


Detail of Na D1-D1 lines..


Detail of 5120 A - 5370 A region.

April 10.114, 2010 observation

V magnitude near 10 (source AAVSO).
Exposure: 10 x 600 sec.

Download v407cyg_20100410_114.dat






 

April 15.070, 2010 observation

V magnitude near 10.2 (source AAVSO).
Exposure: 7 x 600 sec.

Download v407cyg_20100415_070.dat

April 18.063, 2010 observation

V magnitude near 10.6 (source AAVSO).
Exposure: 17 x 600 sec.

Download v407cyg_20100418_063.dat

Comparison: from March 14 to March 23 observations

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