Hello all,
Here is my last contribution to the tracking of Vend47 with the following two spectra :
on September 25 at 21 h 53 UT with a resolution of 509 (JJ = 2458387.4258) and an acquisition time of 40 min (8 x 300 s).
- TCPJ19544251+17222 on September 25th, 2018
- _tcpj19544251+17222_20180925_912_Christophe Boussin_3700_7570.png (109.32 KiB) Viewed 15019 times
on September 28 at 21 h 51 UT with a resolution of 507 (JJ = 2458390.4231) and an acquisition time of 35 min (7 x 300 s).
- TCPJ19544251+17222 on September 28th, 2018
- _tcpj19544251+17222_20180928_911_Christophe Boussin_3700_7570.png (106.79 KiB) Viewed 15019 times
The evolution of the Vend47 spectrum between August 11 and September 28, 2018 appears below :
- TCPJ19544251+17222 on August 11th, 13th, 15th, 18th, 25th and 1st, 7th, 11th, 15th, 25th and 28th September, 2018
- TCPJ19544251+17222 on August 11th, 13th, 15th, 18th, 25th and 1st, 7th, 11th, 15th, 25th and 28th September, 2018 (zoom)
The relative intensities of Balmer lines are always increasing.
For example, the profiles of Halpha and Hbeta lines renormalized around their local continuum are shown below :
- TCPJ19544251+17222 (Halpha)
- tcpj19544251+17222(normcont)_Halpha_Christophe Boussin.png (43.1 KiB) Viewed 15019 times
- TCPJ19544251+17222 (Hbeta)
- tcpj19544251+17222(normcont)_Hbeta_Christophe Boussin.png (43.77 KiB) Viewed 15019 times
The profile of the HeII line at 4686A, also renormalized around its local continuum, shows that the relative intensity of this line seems to be about the same since September 1st :
- TCPJ19544251+17222 (HeII 4686A)
- tcpj19544251+17222(normcont)_HeII4686_Christophe Boussin.png (46.74 KiB) Viewed 15019 times
As before, I always detect a double peak for the position that correspond to the Raman OIV line at 6826A...and the relative intensities of these peaks continue to increase :
- TCPJ19544251+17222 (Raman OIV 6826A)
The [OIII] lines at 4363, 4959 and 5007A are always undetectable at low resolution but...I think I have seen some changes in the Vend47 spectrum...
First, I note that the relative intensity of the line [OI] at 5577A appears to be increasing since September 15th. Second, a structure appeared in the area near the [FeVI] line at 5677A.
Of course, these potential changes need to be confirmed in the coming days...
- TCPJ19544251+17222 ([OI] 5577A and [FeVI] 5677 ?)
Did someone notice something similar?
Clear skies,
Christophe BOUSSIN