AD [2000] |
21 02 09.81
|
DE [2000] |
+45 46 33.0 |
Mag |
7.9 - 17 |
|
|
P Orb [j] |
743 |
Spec |
M8e |
|
|
|
|
Etoile symbiotique dont la magnitude habituelle est de l'ordre de 14.
Outburst détecté à une magnitude 6.8 le 10 mars 2010 par K. Nishiyama (Fukuoka, Japan) and F. Kabashima (Saga, Japan), and by T. Kojima (Tsumagoi, Agatsuma-gun, Gunma-ken, Japan).
Il s'agit du 3ème outburst enregistré (après ceux de 1936 et 1998), mais cette fois de beaucoup plus grande ampleur.
A very bright outburst of this symbiotic star has been discovered by K. Nishiyama (Fukuoka, Japan) and F. Kabashima (Saga, Japan), and by T. Kojima (Tsumagoi, Agatsuma-gun, Gunma-ken, Japan) on 2010 march 10 at a magnitude of 6,8 and 6,9 respectively.
Suivi spectroscopique de l'outburst en basse résolution
Meade LX200 25cm - LHIRES III 150 t/mm - Starlight SXV-H9
Traitement : MaximDL - Iris - VSpec - spectres corrigés par la réponse instrumentale de Véga - normalisation sur la zone 600-610 nm
Echelle des intensités relatives identique pour tous les spectres [-40,+400] (courbe noire)
Agrandissement sur une échelle [-2,20] (courbe bleue)
Etudes
Fichier .dat click droit sur 
 |
2010 mar 22,180 |
+12 j |
Date |
22 03 2010 |
Heure TU |
04:20 |
Exp |
8x300 sec |
Mags AAVSO |
B |
10,4 |
V |
9,2 |
R |
7,4 |
|
|
Phase |
0.319 |

|
 |
2010 mar 31,125 |
+ 21 j |
Date |
31 03 2010 |
Heure TU |
03:00 |
Exp |
12x300 sec |
Mags AAVSO |
B |
11 |
V |
9,9 |
R |
7,8 |
|
|
Phase |
0.332 |
|
 |
2010 avr 06,130 |
+28 j |
Date |
06 04 2010 |
Heure TU |
03:07 |
Exp |
11 x 240 sec |
Mags AAVSO |
B |
|
V |
10 |
R |
|
|
|
Phase |
0.340 |
|
 |
2010 avr 10,167 |
+32 j |
Date |
10 04 2010 |
Heure TU |
04:00 |
Exp |
8 x 240 sec |
Mags AAVSO |
B |
|
V |
10,5 |
R |
|
|
|
Phase |
0.345 |
|
 |
2010 avr 15,137 |
|
|
Date |
15 04 2010 |
Heure TU |
03:11 |
Exp |
4 x 240 sec |
Mags AAVSO |
B |
|
V |
10,5 |
R |
|
|
|
Phase |
0.352 |
Transparence faible

|
 |
2010 avr 17,125 |
+39 j |
Date |
17 04 2010 |
Heure TU |
03:00 |
Exp |
10 x 240 sec |
Mags AAVSO |
B |
|
V |
10,8 |
R |
|
|
|
Phase |
0.354 |

|
 |
2010 avr 21,104 |
+ 43 j |
Date |
21 04 2010 |
Heure TU |
02:30 |
Exp |
12 x 240 sec |
Mags AAVSO |
B |
|
V |
10,8 |
R |
|
|
|
Phase |
0.360 |

|
 |
2010 avr 24,125 |
+46 j |
Date |
21 04 2010 |
Heure TU |
03:00 |
Exp |
12 x 240 sec |
Mags AAVSO |
B |
|
V |
10,8 |
R |
|
|
|
Phase |
0,364 |

|
 |
2010 avr 27,104 |
+49 j |
Date |
27 04 2010 |
Heure TU |
02.30 |
Exp |
12 x 240 sec |
Mags AAVSO |
B |
|
V |
11.0 |
R |
8,8 |
|
|
Phase |
0,368 |

|
 |
2010 mai 13,021 |
+65 j |
Date |
13 05 2010 |
Heure TU |
00:33 |
Exp |
8 x 300 sec |
Mags AAVSO |
B |
|
V |
12.9 |
R |
10.7 |
|
|
Phase |
0,389 |
Apparition bande TiO 7050 de l'étoile primaire

|
 |
2010 mai 14,110 |
+66 j |
Date |
14 05 2010 |
Heure TU |
02:39 |
Exp |
4 x 600 sec |
Mags AAVSO |
B |
|
V |
|
R |
|
|
|
Phase |
0,391 |

|
 |
2010 mai 15,100 |
+67 j |
Date |
15 05 2010 |
Heure TU |
02:25 |
Exp |
4 x 600 sec |
Mags AAVSO |
B |
|
V |
|
R |
|
|
|
Phase |
0,392 |

|
 |
2010 mai 18,06 |
+70 j |
Date |
18 05 2010 |
Heure TU |
01:30 |
Exp |
4 x 600 sec |
Mags AAVSO |
B |
|
V |
|
R |
|
|
|
Phase |
0,396 |

|
 |
2010 mai 19,083 |
+71 j |
Date |
19 05 2010 |
Heure TU |
02:00 |
Exp |
4 x 600 sec |
Mags AAVSO |
B |
|
V |
|
R |
|
|
|
Phase |
0,397 |

|
 |
2010 mai 20,083 |
+72 j |
Date |
20 05 2010 |
Heure TU |
02:00 |
Exp |
4 x 600 sec |
Mags AAVSO |
B |
|
V |
|
R |
|
|
|
Phase |
|

|
 |
2010 mai 21,052 |
+73 j |
Date |
21 05 2010 |
Heure TU |
01:15 |
Exp |
12 x 600 sec |
Mags AAVSO |
B |
|
V |
|
R |
|
|
|
Phase |
|

|
 |
2010 mai 25,062 |
+77 j |
Date |
25 05 2010 |
Heure TU |
01:30 |
Exp |
13 x 600 sec |
Mags AAVSO |
B |
|
V |
~13,2 |
R |
~11,1 |
|
|
Phase |
|

|
 |
2010 mai 31 |
+83 j |
Date |
31 05 2010 |
Heure TU |
01:35 |
Exp |
6 x 600 sec |
Mags AAVSO |
B |
|
V |
~13 |
R |
|
|
|
Phase |
|
|
 |
2010 juin 03 |
+86 j |
Date |
06 06 2010 |
Heure TU |
|
Exp |
12 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.3 |
R |
|
|
|
Phase |
|
|
 |
2010 juin 05 |
+88 j |
Date |
05 06 2010 |
Heure TU |
|
Exp |
16 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.4 |
R |
|
|
|
Phase |
|
|
 |
2010 juin 11 |
+94 j |
Date |
11 06 2010 |
Heure TU |
|
Exp |
7 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.3 |
R |
|
|
|
Phase |
|
|
 |
2010 juin 13 |
+96 j |
Date |
13 06 2010 |
Heure TU |
|
Exp |
16 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.2 |
R |
|
|
|
Phase |
0.431 |
|
 |
2010 juin 17 |
+99 j |
Date |
17 06 2010 |
Heure TU |
|
Exp |
8 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.3 |
R |
|
|
|
Phase |
|
|
 |
2010 juin 22 |
+105 j |
Date |
22 06 2010 |
Heure TU |
|
Exp |
18 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.3 |
R |
|
|
|
Phase |
|
|
 |
2010 juin 26 |
+108 j |
Date |
26 06 2010 |
Heure TU |
|
Exp |
16 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.3 |
R |
|
|
|
Phase |
0.448 |
|
 |
2010 juillet 01 |
+113 j |
Date |
01 07 2010 |
Heure TU |
|
Exp |
23 x 600 sec |
Mags AAVSO |
B |
|
V |
~13.3 |
R |
|
|
|
Phase |
|
|
 |
2010 juillet 23 |
+135 j |
Date |
23 07 2010 |
Heure TU |
|
Exp |
16 x 600 sec |
Mags AAVSO |
B |
15.6 |
V |
14.1 |
R |
11.9 |
|
|
Phase |
|
|
 |
2010 août 05 |
+148 j |
Date |
05 08 2010 |
Heure TU |
|
Exp |
10 x 1200 s |
Mags AAVSO |
B |
|
Vis |
14.5 |
R |
|
|
|
Phase |
|
|
 |
2010 août 24 |
+167j |
Date |
24 08 2010 |
Heure TU |
|
Exp |
3 x 1200 s |
Mags AAVSO |
B |
|
Vis |
|
R |
|
|
|
Phase |
|
Spectre acquis dans des conditions difficiles (pleine lune). 3 poses seulement |
______ 2012 _______________________________________________________________________________________________________________ |
|
 |
Spectre obtenu au foyer du télescope de 60 cm du Centrastro de Saint Michel l'Observatoire
Mag V ~ 16 (Hiroshi Itoh/VSNET)
|

Identification des raies le 10 04 2010 :

Identification des raies le 13 05 2010
On voit apparaïtre une bande TiO, signature de la géante rouge qui compose la symbiotique




Courbes de luminosité AAVSO (V+Vis) durant l'outburst de 2010

Evolution
 |
22 03 2010 Bleu
10 04 2010 Rouge
Augementation de l'intensité relative de toutes les raies.
Développement spectaculaire du blend 6374-6384, dans lequel se trouve [FeX]6374
Apparition de [OIII] 4959 et 5007 |
 |
10 04 2010 Bleu
17 04 2010 Rouge
Affaiblissement des raies SiII, HeI et de la plupart des raies FeII
NII et [NII] se maintiennent
[OIII] en augmentation
Diminution sensible de l'intensité relative des raies HI et de la largeur de Ha |
 |
27 04 2010 Bleu
13 05 2010 Rouge
Le continuum a fortement diminué d'intensité (mag 12,8 dans le vert)
On voit apparaître une bande d'absortion TiO |


Dans l'infrarouge (17 04 2010), non corrigé de la réponse instrumentale.
OI 8448 apparait clairement. On a sans doute [FeXI] 7891.

24 04 2010 - Echelle des intensités logarithmique

V407 Cyg
V407 Cyg est cataloguée comme Mira symbiotique (Allen 1984). La période de pulsation de la mira a été établie à 745 jours avec une amplitude de 3 magnitudes, de 13.5 à >17 (Meinunger, 1966). Cette période est élevée pour une mira. L'intensité de la raie Ha varie fortement (Kolotilov & al. 1998).
Le premier outburst de V407 Cyg (mag 17 à mag 13) a été détecté le 29 août 1936, suivi d'un long déclin jusqu'en août 1939 ; elle a été classée comme nova-like (Hoffmeister (1949)
Ephéméride : Bmax = JD2429710 + 745d * E (Kolotilov & al. 1998)
Photométrie

Observations V et Vis. de l'AFOEV et de l'AAVSO
Liens
Publications
- arXiv:1012.4847
The spectroscopic evolution of the symbiotic-like recurrent nova V407 Cygni during its 2010 outburst. I. The shock and its evolution
S. N. Shore, G. M. Wahlgren, T. Augustijn , T. Liiets, K. L. Page, J. P. Osborne, A. P. Beardmore, P. Koubsky, M. Šlechta, V. Votruba
arXiv:1011.0905
The 2010 nova outburst of the symbiotic Mira V407 Cyg
U. Munari, V.H. Joshi, N.M. Ashok, D.P.K. Banerjee, P. Valisa, A. Milani, A. Siviero, S. Dallaporta, F. Castellani
Références
[1] 2007BaltA..16...23S
Baltic Astronomy, 16, 23-25 (2007)
V407 Cyg as a member of a new subclass of symbiotic stars.
SHUGAROV S.Y., TATARNIKOVA A.A., KOLOTILOV E.A., SHENAVRIN V.I. and YUDIN B.F.
[2] 2002A&A...383..188M
Astron. Astrophys., 383, 188-196 (2002)
A multi-epoch spectrophotometric atlas of symbiotic stars.
MUNARI U. and ZWITTER T.
[3] 2000A&AS..146..407B
Astron. Astrophys., Suppl. Ser., 146, 407-435 (2000)
A catalogue of symbiotic stars.
BELCZYNSKI K., MIKOLAJEWSKA J., MUNARI U., IVISON R.J. and FRIEDJUNG M.
[4] 1998PAZh...24..526K
Pis'ma Astron. Zh., 24, 526-535 (1998)
UBVJHKLMN photometry and optical spectrophotometry of the symbiotic Mira V407 Cygni.
KOLOTILOV E.A., MUNARI U., POPOVA A.A., TATARNIKOV A.M., SHENAVRIN V.I. and YUDIN B.F.
[5] 1994IAUC.6049....1M
IAU Circ., 6049, 1 (1994)
V407 Cygni.
MUNARI U., BRAGAGLIA A., GUARNIERI D., SOSTERO G., LEPARDO A. and YUDIN B.F.
[6] 1984PASAu...5..369A
Proc. Astron. Soc. Australia, 5, 369-421 (1984)
A catalogue of symbiotic stars.
ALLEN D.A.
[7] 2009A&A...505..287I
Astron. Astrophys., 505, 287-298 (2009)
Spectral evolution of the recurrent nova RS Ophiuchi during the 2006 outburst and some mysterious phenomena.
IIJIMA T.
>> AAVSO Special Notice #201
>>
>> Outburst of the symbiotic star V407 Cyg
>> March 12, 2010
>>
>> Further to Maehara et al. (CBET #2199, D.W.E. Green, editor), the
>> presumed symbiotic star V407 Cyg appears to be undergoing a very bright
>> outburst, well outside of its previous range. 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. This is well outside its previously stated range and
>> may indicate a nova outburst in progress.
>>
>> The AAVSO data archive for this object is sparse, and observations of
>> this object are strongly encouraged. Spectroscopy of V407 Cyg is
>> particularly encouraged given both the brightness of the source and the
>> fact that its exact nature is unclear. Suggested classifications for
>> this source include slow nova with either a Mira secondary or Mira
>> component, or a symbiotic star. Spectroscopy and multicolor photometry
>> may provide more information on the nature of this system, while visual
>> observations and time-series photometry will be needed for tracking the
>> overall light evolution of the system.
>>
>>
>> V407 Cyg is located at the following (J2000) coordinates:
>>
>> RA: 21 02 09.85 , Dec: +45 46 33.0
>>