Dr. Ileana Andruchow

   M.Sc. in Astronomy, 2001, UNLP, Argentina, "Study of the characteristics of the nebular material associated to globular clusters"
Ph.D. in Astronomy, 2006, UNLP, Argentina, "Photopolarimetric studies on the fast variability of blazars"

Current position: Researcher
La Plata Institute for Astronomy (IALP-CONICET), Argentina
Faculty of Astronomical and Geophysical Sciences, University of La Plata (FCAyG-UNLP), Argentina

Publication list

Contact: andru@fcaglp.unlp.edu.ar

For my M.Sc. research (Licenciatura), I performed simulations of globular cluster images with and without nebular material. Then, I analysed the output of the simulations with IRAF routines in order to measure the level of detectable dust in bright profiles of the globular clusters. This work was done under the direction of Dr. Juan Carlos Forte (University of La Plata) and with the important collaboration of Leonardo Pellizza (from IAFE-UBA).

For my Ph.D. Thesis, I have implemented studies of the incidence of optical microvariability in the light curves of different types of Active Galactic Nuclei, with special emphasis on EGRET blazars. These studies were carried out, first, from a purely observational point of view, collecting data from the sources through photometry and polarimetry (we used mainly the 2.15-m telescope at CASLEO, San Juan, Argentina). These data were reduced using IRAF package in the case of the photometry and a FORTRAN code for the case of polarimetry. Then, I performed a statistical analysis of the processed data to characterise the different classes of objects (LBLs, HBLs, OVVs, etc.). Afterwards, I went into the theoretical discussion of the origin of the observed variability, testing same models with the observations.
Complementary to these studies, I investigated the influence of the atmospheric conditions in the polarimetric measurements during the observation of blazars with prominent host galaxies. Such studies allowed the identification of possible sources of error during monitoring campaigns under a wide variety of circumstances. I implemented a numerical simulation of the host galaxy, the nuclei and the atmosphere, in order to predict the incidence of spurious variability in this kind of studies. My Ph.D. research was made under the supervision of Prof. Gustavo E. Romero and Dr. Sergio A. Cellone (Both members of GARRA).

During my postdoctoral research I stated to investigate the incidence of microvariability and the optical polarization properties of blazars with very high emission at gamma-ray wavelengths (VHE sources), those detected by H.E.S.S. and MAGIC. This research was also made under the supervision of the Dr. Gustavo E. Romero and Dr. Sergio A. Cellone.

Since then, I am working, more or less, in the same direction. In particular, since the VHE sources could not be to much far away because of the effect of the Electromagnetic Background Light (EBL) over the very high radiation, we have also started to try to obtaind better estimations of the redshift of same Blazars, using high resolution spectrums taking with telescopes such as Gemini.