Rapid variations and a very deep minimum in the light curve of 3C 345

Bibcode
1990A&A...227L..25K
Kidger, M. R.; de Diego, J. A.
Referencia bibliográfica

Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 2, Jan. 1990, p. L25-L28.

Fecha de publicación:
1
1990
Número de autores
2
Número de autores del IAC
2
Número de citas
25
Número de citas referidas
25
Descripción
This paper reports CCD photometry of 3C345 taken in the summer of 1988 and spring of 1989 which show this object declining to the faintest magnitude yet recorded in B, of 18.32. A full light curve is presented, as well as an intraday and a three-week continuous light curve. Rapid CCD photometry at this faint level reveals the presence of a rapid fade in the light curve which, if real, is probably the fastest variation ever seen in this object in terms of magnitudes per hour. The existence of intraday variability in 3C 345 is now no longer in doubt.
Tipo
Con árbitro
Estrellas variables
Llamaradas estelares

Te puede interesar

  • Con árbitro
    An ultra-short-period super-Earth with an extremely high density and an outer companion
    We present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 d. We obtained follow-up transit photometry, confirming the star as the host of the signal
    Livingston, John H. et al.

    Fecha de publicación:

    11
    2024
    Bibcode
    2024NatSR..1427219L
    Número de citas
    0
  • Con árbitro
    Neural calibration of imaging Stokes polarimeters
    Current polarimetric calibration techniques derive the instrument modulation matrix by numerically fitting an instrumental model to measurements of a set of calibration Stokes vectors. These techniques are typically limited to an error on the retrieved normalized Stokes Q, U and V parameters, in the $1\times10^{-2}$ to $1\times10^{-3}$ range. This
    Iglesias, F. A. et al.

    Fecha de publicación:

    8
    2024
    Bibcode
    2024BAAA...65..281I
    Número de citas
    0
  • Con árbitro
    Model-based identification of solar coronal mass ejections using deep neural networks
    Coronal mass ejections (CMEs) are a major driver of space weather and thus can have important negative technological and social impacts. To assess their geoeffectiveness once they are ejected, it is crucial their prompt identification in coronagraph images. In the last decade, deep neural networks (DNN) have experienced enormous improvements in
    Iglesias, F. A. et al.

    Fecha de publicación:

    8
    2024
    Bibcode
    2024BAAA...65...17I
    Número de citas
    0