CURRRICULIM VITAE

Rumen Bachev

Personal Data

Full name: Rumen S. Bachev, PhD

Birth date and place: May 23,1971; Sofia, Bulgaria

Nationality: Bulgarian

Affiliation: Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria

E-mail: (the server will delete without notice any e-mail from *.com, *.net, *.biz, etc.)

Current address: IANAO – BAS, 72 Tsarigradsko Shose Blvd., Sofia 1784, Bulgaria

Languages: Bulgarian as a first language, English, Russian

 

Education

  • 2003: PhD, Astronomy, Institute of Astronomy, Sofia, Bulgaria
  • 2003: MS, Astronomy, Univ. of Alabama, Tuscaloosa, AL, USA
  • 1994: BS and MS, Physics and Astronomy, Sofia University, Bulgaria
  • 1989: National High School of Mathematics and Natural Sciences, Sofia, Bulgaria

 

Research experience:

  • 2010. ARIES, Nainital, India. Collaborative work.
  • 2009. Senior research assoc. (associate professor), IANAO-BAS, Sofia, Bulgaria
  • 2006. Research associate (assistant professor), Institute of Astronomy, Sofia, Bulgaria
  • 2003. Thesis, Institute of Astronomy, Sofia, Bulgaria
  • 2003. Summer Intern, Osservatorio Astronomico di Padova, Italy
  • 2002. Summer Intern, Osservatorio Astronomico di Padova, Italy
  • 2002. Research Assistant, Univ. of Tuscaloosa, Alabama
  • 2001. Summer Intern, Osservatorio Astronomico di Padova, Italy
  • 1998. Intern, University of Groningen, The Netherlands
  • 1995. Staff Astronomer, Institute of Astronomy, Sofia, Bulgaria

 

Experience with astronomical equipment and software:

  • 2.0m RCC telescope, Rozhen, Bulgaria: CCD imaging
  • 0.6m telescope, Observatory of Belogradchik, Bulgaria: CCD and photometer observations
  • 0.6m telescope, Rozhen Observatory: CCD imaging
  • 1.8m telescope, Asiago, Italy: Spectral observations
  • 2.1m telescope, San Pedro Martir, Mexico: Spectral observations
  • 1m telescope, ARIES, India, CCD imaging
  • 0.4m telescope of the Univ. of Alabama: CCD imaging
  • Familiar with IRAF, Unix/Linux, Windows. Programming skills in C++, VB. Astronomical software development.

 

Teaching experience:

  • 2000; 2002 – 2005. Teaching assistant, Univ. of Alabama, Tuscaloosa. Taught astronomy lab for non-majors (AY102); physics lab for non-majors (PH102); substitute lectured in AY101 and AY203 classes (Intro and Observational Astronomy); occasional public demonstrations
  • 1995 – 2000. Institute of Astronomy, Sofia and the Observatory of Belogradchik (Bulgaria) – public lectures on a variety of astronomical topics; demonstrations.

 

Attended schools, meetings and colloquia:

  • September, 2010, "Robotic Telescopes in the Western Balkan Region", Prokuplje, Serbia (talk)
  • October, 2009, Cherenkov Telescope Array Meeting, Zurich, Switzerland
  • May, 2006, 5th Bulgarian-Serbian Astronomy Conference "Astronomy and Space Science" (poster)
  • June, 2004. South – East European Astronomical Meeting, Rozhen, Bulgaria (poster)
  • July, 2002. Astrophysical Disks, Jets and High Energy Phenomena in Astrophysics, Les Houches, France (talk)
  • Sept, 2000. Balkan Meeting of Young Astronomers, Belogradchik, Bulgaria (poster)
  • June, 2000. Second Bulgarian – Serbian Astronomical Meeting, Zajecar, Serbia (poster)
  • Aug, 1998. First Bulgarian – Serbian Astronomical Meeting, Belogradchik, Bulgaria
  • June, 1998. Astrophysical Discs, Cambridge, England (poster)

 

Research interests:

Theoretical:

  • Active Galactic Nuclei astrophysics: black hole parameter determination, variability models, unification schemes, broad line region structure and kinematics, emission line profile modeling, X-ray emission, radio loudness.
  • Accretion disks: geometry, transition radii, accretion modes, stationarity, outflows, selfgravitation
  • Blazar SED modeling, spectral evolution
  • Statistical methods in Astrophysics, low dimensional chaos

Observational:

  • AGN spectroscopy; ground and space based
  • AGN continuum variability, short-term variations
  • Blazar variability
  • Variability in cataclysmic stars
  • Observational techniques and code development

 

References:

Prof. Tanuy Bonev, IANAO-BAS, Director

Prof. Valeri Golev, Sofia University, Astronomy dept., Chair

Prof. Jack Sulentic, Instituto de Astrofisica de Andalucia

 

 

List of publications:

(Updated March, 2011; check http://adsabs.harvard.edu for a full list and recent updates):

 

Refereed publications as a first author

  • Bachev R., Semkov E., Strigachev A., et al., 2011, A&A 528, L10, "Intranight variability of 3C 454.3 during its 2010 November outburst"
  • Bachev R., Grupe D., Boeva S., et al., 2009, MNRAS, 399, 750; "Studying X-ray reprocessing and continuum variability in quasars: PG 1211+143"
  • Bachev R., 2009, A&A, 493, 907; "Quasar optical variability: searching for interband time delays"
  • Bachev R., Strigachev A., Semkov E., Mihov B., 2008, A&A, 488, 887; "Spectroscopy of bright quasars: emission lines and internal extinction"
  • Bachev R., Strigachev A., Semkov E., 2005, MNRAS, 358, 774 “Short-term optical variability of high-redshift QSO's”
  • Bachev R., Marziani P., Sulentic J. W., et al. 2004, ApJ 617, 171 “Average UV Quasar Spectra in the Context of Eigenvector 1: A Local Baldwin Effect Governed by Eddington Ratio?”
  • Bachev R., Strigachev A., 2004, AN, 325, No. 4, 1 (astro-ph/0310647): “Optical Continuum Variability of the Active Galaxy Mrk 279 - Implications for Different Accretion Regimes”
  • Bachev, R.; Strigachev, A.; Dimitrov, V. 2000, A&A Supl, 147, 175, “VRI comparison stars for selected active galaxies”
  • Bachev, R., 1999, A&A, 348, 71 “Emission lines from illuminated warped accretion disks in AGN”

 

Other refereed publications

  • Abdo, A. A.; Ackermann, M.; Ajello, M., .., Bachev R., et al., 2011, ApJ, 726, 43; "Multi-wavelength Observations of the Flaring Gamma-ray Blazar 3C 66A in 2008 October"
  • Marziani P., Sulentic J. W., Negrete C. A., Dultzin D., Zamfir S., Bachev R., 2010, MNRAS 409, 1033, "Broad-line region physical conditions along the quasar eigenvector 1 sequence"
  • Rani B., Gupta A. C., Strigachev A., Bachev R., Wiita P. J., et al., 2010, MNRAS 404, 1992; "Short-term flux and colour variations in low-energy peaked blazars"
  • Vercellone S., D'Ammando F., Vittorini V., .., Bachev R., et al., 2010 ApJ 712, 405; "Multiwavelength Observations of 3C 454.3. III. Eighteen Months of Agile Monitoring of the "Crazy Diamond""
  • Raiteri C. M., Villata M., Capetti A., .., Bachev R., et al., 2009, A&A 507, 769; "WEBT multiwavelength monitoring and XMM-Newton observations of BL Lacertae in 2007-2008. Unveiling different emission components"
  • Villata M., Raiteri C. M., Gurwell M. A., .., Bachev R., et al., 2009, A&A, 504, 9; "The GASP-WEBT monitoring of 3C 454.3 during the 2008 optical-to-radio and γ-ray outburst"
  • Bottcher M., Fultz K., Aller H. D., .., Bachev R, et al.,  2009, ApJ, 694, 174,  "The WEBT Campaign on the Intermediate BL Lac Object 3C 66A in 2007-2008."
  • Raiteri C. M., Villata M.,..., Bachev R., et al., 2008, A&A 491, 755, "A new activity phase of the blazar 3C 454.3. Multifrequency observations by the WEBT and XMM-Newton in 2007–2008"
  • Larionov V. M, Jorstad S. G., Marscher A. P.,..., Bachev R., et al., 2008, A&A 492, 389; "Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006–2007"
  • Zamanov R. K., Bode M. F., Melo C. H. F., Stateva I. K., Bachev R., et al., 2008, MNRAS 390, 377; "Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics"
  • Raiteri, C. M., Villata, M., Larionov,….., Bachev R., et al.,  2008, A&A,480, 339, "Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006-2007 outburst"
  • Mihov, B., Bachev, R., Slavcheva-Mihova, L., Strigachev, A., Semkov, E., Petrov, G., 2008, AN, 329 , 77, "Photometric monitoring of the blazar 3C 345 for the period 1996-2006"
  • Böttcher, M., Basu, S., Joshi, M., Villata, M., Arai, A., Aryan, N., Asfandiyarov, I. M., Bach, U., Bachev, R., et al.,  2007, ApJ, 670, 968, "The WEBT Campaign on the Blazar 3C 279 in 2006"
  • Zamanov R. K., Bode M. F., Melo C. H. F., Bachev R., et al., 2007, MNRAS, 380, 1053; "Rotational velocities of the giants in symbiotic stars - II. Are S-type symbiotics synchronized?"
  • Sulentic, Jack W., Bachev, Rumen, Marziani, Paola, Negrete, C. Alenka, Dultzin, Deborah, 2007, ApJ, 666, 757, "C IV λ1549 as an Eigenvector 1 Parameter for Active Galactic Nuclei
  • Negrete C. A., J. W. Sulentic, R. Bachev, P. Marziani, D. Dultzin,  2008, RMxAC, 32, 106-106; "Spectroscopic Study of C IV lambda 1549 and its Relation with Optical Parameters in Active Galactic Nuclei"
  • Contadakis, M. E.; Avgoloupis, S.; Seiradakis, J.; ..;Bachev, R. S., and 3 coauthors , 2004, AN, 325, 427, “Detection of high-frequency optical oscillation during the flare phase of EV Lac in 1999”
  • Sulentic, J. W.; Zamfir, S.; Marziani, P.; Bachev, R.; Calvani, M.; Dultzin-Hacyan, D.; 2003, ApJ, 597, L17 “Radio-loud Active Galactic Nuclei in the Context of the Eigenvector 1 Parameter Space”
  • Marziani, P.; Sulentic, J. W.; Zamanov, R.; Calvani, M.; Dultzin-Hacyan, D.; Bachev, R.; Zwitter, T.; 2003, ApJS, 145, 199 “An Optical Spectroscopic Atlas of Low-Redshift Active Galactic Nuclei”
  • Zamanov, R.; Marziani, P.; Sulentic, J. W.; Calvani, M.; Dultzin-Hacyan, D.; Bachev, R., 2002, ApJ, 576, L9, “Kinematic Linkage between the Broad- and Narrow-Line-emitting Gas in Active Galactic Nuclei”
  • Sulentic, J. W.; Marziani, P.; Zamanov, R.; Bachev, R.; Calvani, M.; Dultzin-Hacyan, D., 2002, ApJ, 566, L71 “Average Quasar Spectra in the Context of Eigenvector 1”
  • Zhilyaev, B. E.; Romanyuk, Ya. O.; Verlyuk, I. A.; ...;Bachev, R. S.; et al. 2000, A&A, 364, 641 “Detection of high-frequency optical oscillations on the flare star EV Lacertae”
  • Zhilyaev, B. E.; Romanyuk, Ya. O.; Verlyuk, I. A.; ...;Bachev, R. S.; et al., 2000, KFNTS, 3, 339 “High-frequency optical oscillations on the flare star EV Lacertae”
  • Konstantinova-Antova, R. K.; Antov, A. P.; Bachev, R. S., 2000, IBVS, 4867, 1, “Flares in the Active Giant V390 Aur”
  • Zhilyaev, B. E.; Verlyuk, I. A.; Romanyuk, Ya. O.;....; Bachev, R. S.; et al., 1998, A&A, 334, 931,“New features in the EV Lacertae flares discovered by fast high precision UBVRI photometry” 

 

Conference proceedings, non-refereed publications, and local editions

  • S. Boeva, A. Antov, R. Bachev, 2010, Bulg. AJ, 13; "The distance of the cataclysmic variable KR Aurigae"
  • E. Semkov, R. Bachev, A. Strigachev, A. C. Gupta, B. Rani, H. Gaur, E. Ovcharov, B. Mihov, A. Valcheva, S. Peneva, S. Boeva, N. Kacharov, 2010, Bulg. AJ, 14; "Short term optical variability of blazars: first results from joint international collaborations"
  • Strigachev, Anton; Bachev, Rumen; Semkov, Evgeni; 2008, Open European Journal on Variable Stars, 0079, No. 1, 1-3; "Discovery of a New Variable Star GSC2.3 N2X9042559"
  • Petrov Georgi, Momchil Dechev, Lyuba Slavcheva, Peter Duchlev, Boyko Mihov, V. Kopchev, Rumen Bachev, 2008, "VI Serbian-Bulgarian Astronomical Conference, 7-11 May 2008”, pp. 26-26; "Astronomical Virtual Observatory. Bulgarian Virtual Observatory – Place and Role”
  • Boeva Svetlana, Aleksander Antov, Rumen Bachev, Tsvetan Georgiev; 2008, "VI Serbian-Bulgarian Astronomical Conference, 7-11 May 2008”, pp. 31-31; "On the Distance of KR Aurigae”
  • Anton Strigachev, Rumen Bachev, Evgeni Semkov, 2007, Bulg. AJ, 8, 3-4;  "WEBT-Coordinated Optical Monitoring of Intra-night Variable Blazars – S5 0716+71 and OJ 287"
  • Kovačević Jelena, Rumen Bachev, Luka Č Popović, Radoslav Zamanov, Paola Marziani, 2007, AIP Conf. Proc., 938, 104-108; “Asymmetry of the C IV λ 1549 Å and [O III] λλ 4959, 5007 Å Lines in a Sample of RQ and RL AGN”
  • R. K. Zamanov, R. Bachev, 2007, Astr. Tel. 1220, 1; "CCD observations of the flickering of the recurrent nova RS Oph"
  • S. Boeva, R. K. Zamanov, A. Antov, R. Bachev, Ts. B. Georgiev, 2007, Bulg. AJ, 8, 11-16; "BVI observations of the flickering in the cataclismic variable KR Aur"
  • Rumen S. Bachev, 2007, Bulg. J. Phys, 34, No. S2, pp. 275-277; "Tracing Quasar Accretion Rates at Higher Redshifts"
  • R. Zamanov, R. Konstantinova-Antova, C. Melo, F. M. Bode, A. Comboc, R. Bachev, 2007, Bulg. J. Phys., 34, No. S2, pp. 124-130; “Rotation of the mass donors in symbiotic stars”
  • S. Boeva, A. Antov, R. S. Bachev, 2007, Bulg. J. Phys., 34 No. S2, pp. 232-235; "Flickering in KR Aurigae - CCD Observations"
  • Boeva, S.; Antov, A.; Semkov, E.; Bachev, R.; 2006, ASP Conf. Ser., 349, 197-201; “CCD Photometry of KR Aurigae in 1996-2005”
  • Semkov E., Strigachev A., Bachev R., 2005, Aerospace Research, Proceedings of the South-Eastern Astronomical Conference, Rozhen, 2004. "Spectra of bright quasars observed with the 2m Rozhen telescope"
  • Calvani M., Marziani P., Bachev R., Sulentic J. W., Zamanov R. K., Dultzin-Hacyan D., 2004, MmSAIS, 5, 223: ” Toward an Understanding of the Baldwin Effect: is the Eddington Ratio the Key Factor?”
  • Zamanov, R.; Marziani, P.; Sulentic, J. W.; Calvani, M.; Bachev, R.; Stirpe, G.; Dultzin-Hacyan, D., 2003, Memorie della Societa Astronomica Italiana Supplement, v.3, p.222, “Accretion Parameters and AGN Diversity”
  • Antov, A. P.; Bachev, R. S.; Boeva, S. S., 2001, Astronomische Gesellschaft Abstract Series, Vol. 18, “CCD Photometry of KR Aur with the 60 cm Telescope at Belogradchik Observatory”
  • Bachev, Rumen S., In: Balkan Meeting of Young Astronomers, 25 - 29 September 2000, Belogradchik, Bulgaria, 2001, p. 84 – 87 “Search for microvariability in Seyfert galaxies”
  • Bachev R., Slavcheva-Mihova L., 2000, Publ. Astr. Obs. Belgrade, 2000, 67, 3 "Search for Optical Variability in Two Seyfert Galaxies",
  • Bachev R., 1999, in "Activity in Galaxies and Related Phenomena", IAU 194, Armenia. Edited by Y. Terzian, E. Khachikian, and D. Weedman, San Francisco: Astronomical Soceity of the Pacific, p.313 "Bardeen-Petterson Effect and Broad HI Profiles of Seyferts",
  • Bachev R., Petrov G., Slavcheva L., Mihov B., , 1999, in "Activity in Galaxies and Related Phenomena", IAU 194, Armenia. Edited by Y. Terzian, E. Khachikian, and D. Weedman, San Francisco: Astronomical Soceity of the Pacific, p. 311,"Black Hole Masses and Unification of Seyferts"
  • Mihov B, Bachev R, Slavcheva L, Strigachev A., Petrov G., 1999, in "Activity in Galaxies and Related Phenomena", IAU 194, Armenia. Edited by Y. Terzian, E. Khachikian, and D. Weedman, San Francisco: Astronomical Soceity of the Pacific, p. 175. "Photometric Monitoring of Selected Quasars: The Highly Luminous Quasar HS 1946+7658"
  • Slavcheva L., Petrov G., Mihov B., Bachev R., , 1999, in "Activity in Galaxies and Related Phenomena", IAU 194, Armenia. Edited by Y. Terzian, E. Khachikian, and D. Weedman, San Francisco: Astronomical Soceity of the Pacific, p. 87 "Spectrophotometry of Selected AGN: Seyfert Galaxy AKN 564"
  • Petrov G., Slavcheva L., Mihov B., Bachev R., 1999, in "Activity in Galaxies and Related Phenomena", IAU 194, Armenia. Edited by Y. Terzian, E. Khachikian, and D. Weedman, San Francisco: Astronomical Soceity of the Pacific, p. 84 "Surface Photometry of Barred AGN Arakelian 564",
  • Bachev R. et al., 1999, Bulg. Journ. Phys., 5/6, 1, "Observations At Astronomical Observatory Belogradchik with CCD Camera SBIG ST-8"
  • Bachev R., Petrov G. T., 1998, Comp. Rendus de l'Acad. Bulg. des Scien., 7/8 "On the Black Hole Masses, Accretion Rates and Unification of Seyfert Galaxies"