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Spectrophotometric reverberation mapping of intermediate-mass black hole NGC 4395

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dc.contributor.author Pandey, Shivangi
dc.contributor.author Rakshit, S
dc.contributor.author Chand, Krishan
dc.contributor.author Stalin, C. S
dc.contributor.author Cho, Hojin
dc.contributor.author Woo, Jong-Hak
dc.contributor.author Jalan, P
dc.contributor.author Mandal, A. K
dc.contributor.author Omar, A
dc.contributor.author Jose, Jincen
dc.contributor.author Gupta, Archana
dc.date.accessioned 2024-12-05T05:42:43Z
dc.date.available 2024-12-05T05:42:43Z
dc.date.issued 2024-11-20
dc.identifier.citation The Astrophysical Journal, Vol. 976, No. 1, 116 en_US
dc.identifier.issn 1538-4357
dc.identifier.uri http://hdl.handle.net/2248/8594
dc.description Open Access en_US
dc.description Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI
dc.description.abstract Understanding the origins of massive black hole seeds and their coevolution with their host galaxy requires studying intermediate-mass black holes (IMBHs) and estimating their mass. However, measuring the masses of these IMBHs is challenging, due to the high-spatial-resolution requirement. Spectrophotometric reverberation monitoring is performed for a low-luminosity Seyfert 1 galaxy, NGC 4395, to measure the size of the broad-line region and black hole mass. The data were collected using the 1.3 m Devasthal fast optical telescope and 3.6 m Devasthal optical telescope at ARIES, Nainital, over two consecutive days in 2022 March. The analysis revealed strong emission lines in the spectra and light curves of the merged 5100 Å spectroscopic continuum flux (f 5100) with the photometric continuum V band and Hα, with fractional variabilities of 6.38% and 6.31% respectively. In comparison to several previous studies with lag estimation <90 minutes, our calculated Hα lag supersedes them by minutes, using the ICCF and JAVELIN methods. The velocity dispersion (σ line) of the broad-line clouds is measured to be km s‑1, yielding a black hole mass of ∼ and an Eddington ratio of 0.06. en_US
dc.language.iso en en_US
dc.publisher American Astronomical Society en_US
dc.relation.uri https://doi.org/10.3847/1538-4357/ad7fe1
dc.rights © 2024. The Author(s)
dc.subject Black holes en_US
dc.subject Active galactic nuclei en_US
dc.subject Reverberation mapping en_US
dc.subject Spectroscopy en_US
dc.subject Intermediate-mass black holes en_US
dc.title Spectrophotometric reverberation mapping of intermediate-mass black hole NGC 4395 en_US
dc.type Article en_US


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