% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Roy:598714,
      author       = {Roy, Abhradeep and Gupta, Alok C. and Chitnis, Varsha R.
                      and Cellone, Sergio A. and Raiteri, Claudia M. and Romero,
                      Gustavo E. and Wiita, Paul J. and Chatterjee, Anshu and
                      Combi, Jorge A. and Liao, Mai and Sarkar, Arkadipta and
                      Villata, Massimo},
      title        = {{S}tudy of {V}ariability in {L}ong-term {M}ultiwavelength
                      {O}ptical {L}ightcurves of {B}lazar {AO} 0235+164},
      reportid     = {PUBDB-2023-06969, arXiv:2301.01944},
      year         = {2023},
      note         = {27 pages, 10 figures. Accepted for publication in The
                      Astrophysical Journal Supplement Series (ApJS)},
      abstract     = {We present a long-term and intraday variability study of
                      optical multiwaveband (U BV RI) data from the blazar AO
                      0235+164 collected by various telescopes for ∼44 yr
                      (1975–2019). The blazar was found to be significantly
                      variable over the years in all wave bands with a variation
                      of about 6 mag between its low and active states. The
                      variations in the different wave bands are highly correlated
                      without any time lag. We did not observe any significant
                      trend in color variation with time, but we observed a
                      bluer-when-brighter trend between the B − I color index
                      and the R magnitude. Optical BV R-band spectral energy
                      distributions always show a convex shape. Significant
                      intraday variability was frequently seen in the
                      quasi-simultaneous observations of AO 0235+164 made on 22
                      nights in the R and V bands by the CASLEO and CAHA
                      telescopes during 1999–2019. We also estimated a central
                      supermassive black hole mass of 7.9 × 10$^{7}$ M $_{⊙}$
                      by analyzing the broad Mg ii emission line in AO 0235+164's
                      spectrum. We briefly explore the probable physical scenarios
                      responsible for the observed variability.},
      cin          = {$Z_VER$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_VER-20210408$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613)},
      pid          = {G:(DE-HGF)POF4-613},
      experiment   = {EXP:(DE-H253)VERITAS-20170101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2301.01944},
      howpublished = {arXiv:2301.01944},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2301.01944;\%\%$},
      doi          = {10.3204/PUBDB-2023-06969},
      url          = {https://bib-pubdb1.desy.de/record/598714},
}