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Photometric Reverberation Mapping of AGNs at 0.1 < z <0.8. I. Observational Technique

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Abstract

The improvement of the calibration relation for determining the size of the broad-line region from the observed optical luminosity of active galactic nuclei (AGN) is a necessary task to study fundamental parameters of distant AGNs such as mass of the central supermassive black hole. The most popular method of the BLRsize estimation is the reverberation mapping based onmeasuring the time delay between the continuum flux and the flux in the emission lines. In our work, we apply the method of photometric reverberation mapping in medium-band filters, adapted for observations at the Zeiss-1000 telescope of the SAO RAS, for the study of AGN with broad lines in the range of redshifts 0.1 < z < 0.8. This paper describes the technique of observations and data processing, provides a sample of objects and demonstrates the stability of the used method. As a preliminary result for 2MASXJ08535955+7700543 at z = 0.1 we have obtained time delay estimates of τ(ICCF) = 32.2±10.6 days and τ(JAVELIN) = 39.5−15.8+23.0 days that are consistent with each other and also within the accuracy of the existing calibration relations.

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Acknowledgments

The authors are sincerely grateful to the reviewer for fruitful comments, which contributed to the improvement to the article.

The authors thank V. L. Afanasiev for useful discussions and comments.

Funding

The work is executed at support of RFBR grant 18-32-00826. Observations on the telescopes of SAO RAS are carried out with the support of the Ministry of science of the Russian Federation.

The work was performed as part of the government contract of the SAO RAS approved by theMinistry of Science and Higher Education of the Russian Federation.

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Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 369167, Russia

    R. I. Uklein, E. S. Shablovinskaya, A. E. Perepelitsyn & A. A. Grokhovskaya

  2. Kazan Federal University, Kazan, 420008, Russia

    E. A. Malygin

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  1. R. I. Uklein
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  2. E. A. Malygin
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  3. E. S. Shablovinskaya
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  4. A. E. Perepelitsyn
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  5. A. A. Grokhovskaya
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Correspondence to R. I. Uklein.

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Conflict of Interests

The authors declare no conflict of interest regarding this paper.

Russian Text © The Author(s), 2019, published in Astrofizicheskii Byulleten’, 2019, Vol. 74, No. 4, pp. 397–405.

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Uklein, R.I., Malygin, E.A., Shablovinskaya, E.S. et al. Photometric Reverberation Mapping of AGNs at 0.1 < z <0.8. I. Observational Technique. Astrophys. Bull. 74, 388–395 (2019). https://doi.org/10.1134/S1990341319040059

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  • DOI: https://doi.org/10.1134/S1990341319040059

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