| Autor: |
Artamonov, B. P., Shimanovskaya, E. V., Bruevich, V. V., Burkhonov, O., Egamberdiev, Sh. A. |
| Předmět: |
|
| Zdroj: |
Astronomy Letters; Apr2024, Vol. 50 Issue 4, p230-237, 8p |
| Abstrakt: |
In 2015–2021 we carried out observations of the Seyfert 1 galaxy (SyG 1) NGC 7469 in Bessell filters with the 1.5-m telescope of the Maidanak Observatory, which have continued the monitoring of NGC 7469 since 1990. We took CCD frames and performed standard frame processing, including bias correction, sky background subtraction, flat fielding, cosmic-ray particle removal, etc. All our data were obtained on CCD cameras with deep cooling and subarcsecond seeing. We carried out the calibrations using several standard stars in the same frame as the galaxy. The results of our photometry in a 13.5 arcsec aperture are presented graphically in the visibility windows of the observed period. A slow (S) flare was detected on the constructed variability curves in the filters; a slow increase in brightness is observed since 2015, reaching a maximum in 2019. The amplitude of the S flare is 0.5 mag in the filter and decreases to zero in the filter. On the color–color diagrams the colors in a 5 arcsec aperture are bluer than those in a 30 arcsec aperture. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink