The DOI matches its Crossref record; 146 of the 147 references it cites were found in a registry or an index.
A systematic search for changing-look quasars in SDSS
Open accessAbstract
We present a systematic search for changing-look quasars based on repeat photometry from Sloan Digital Sky Survey (SDSS) and Pan-STARRS1, along with repeat spectra from SDSS and SDSS-III Baryon Oscillation Spectroscopic Survey. Objects with large, |Δg| > 1 mag photometric variations in their light curves are selected as candidates to look for changes in broad emission line (BEL) features. Out of a sample of 1011 objects that satisfy our selection criteria and have more than one epoch of spectroscopy, we find 10 examples of quasars that have variable and/or ‘changing-look’ BEL features. Four of our objects have emerging BELs, five have disappearing BELs, and one object shows tentative evidence for having both emerging and disappearing BELs. With redshifts in the range 0.20 < z < 0.63, this sample includes the highest redshift changing-look quasars discovered to date. We highlight the quasar J102152.34+464515.6 at z = 0.204. Here, not only have the Balmer emission lines strongly diminished in prominence, including Hβ all but disappearing, but the blue continuum fν∝ν1/3 typical of an active galactic nuclei is also significantly diminished in the second epoch of spectroscopy. Using our selection criteria, we estimate that >15 per cent of strongly variable luminous quasars display changing-look BEL features on rest-frame time-scales of 8 to 10 yr. Plausible time-scales for variable dust extinction are factors of 2–10 too long to explain the dimming and brightening in these sources, and simple dust reddening models cannot reproduce the BEL changes. On the other hand, an advancement such as disc reprocessing is needed if the observed variations are due to accretion rate changes.
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In the citing paper
“LSST data will provide good constraints on AGN lifetimes, or at least the timescales over which they make distinct accretion-state transitions”
From LSST: From Science Drivers to Reference Design and Anticipated Data Products (2019) · cites this paper as MacLeod et al. 2016
Citations
Cites
The Sloan Digital Sky Survey: Technical Summary
York, D., Adelman, J., Anderson, J., Anderson, S., Annis, J., Bahcall, N., Bakken, J., Barkhouser, R., Bastian, S., Berman, E., et al. (2000) · The Astronomical Journal · doi:10.1086/301513 · Cited by 8,368
THE SEVENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY
Abazajian, K. N., Adelman-McCarthy, J. K., Agüeros, M. A., Allam, S. S., Prieto, C. A., An, D., Anderson, K. S. J., Anderson, S. F., Annis, J., Bahcall, N. A., et al. (2009) · The Astrophysical Journal Supplement Series · doi:10.1088/0067-0049/182/2/543 · Cited by 5,341
LSST: From Science Drivers to Reference Design and Anticipated Data Products
Ivezić, Ž., Kahn, S. M., Tyson, J. A., Abel, B., Acosta, E., Allsman, R., Alonso, D., AlSayyad, Y., Anderson, S. F., Andrew, J., et al. (2019) · The Astrophysical Journal · doi:10.3847/1538-4357/ab042c · Cited by 4,357
The host galaxies of active galactic nuclei
Kauffmann, G., Heckman, T. M., Tremonti, C., Brinchmann, J., Charlot, S., White, S. D. M., Ridgway, S. E., Brinkmann, J., Fukugita, M., Hall, P. B., et al. (2003) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2003.07154.x · Cited by 3,978
The Sloan Digital Sky Survey Photometric System
Fukugita, M., Ichikawa, T., Gunn, J. E., Doi, M., Shimasaku, K., & Schneider, D. P. (1996) · The Astronomical Journal · doi:10.1086/117915 · Cited by 3,033
The FIRST Survey: Faint Images of the Radio Sky at Twenty Centimeters
Becker, R. H., White, R. L., & Helfand, D. J. (1995) · The Astrophysical Journal · doi:10.1086/176166 · Cited by 2,808
THE ELEVENTH AND TWELFTH DATA RELEASES OF THE SLOAN DIGITAL SKY SURVEY: FINAL DATA FROM SDSS-III
Alam, S., Albareti, F. D., Prieto, C. A., Anders, F., Anderson, S. F., Anderton, T., Andrews, B. H., Armengaud, E., Aubourg, É., Bailey, S., et al. (2015) · The Astrophysical Journal Supplement Series · doi:10.1088/0067-0049/219/1/12 · Cited by 2,491
Self-citationSloan Digital Sky Survey: Early Data Release
Stoughton, C., Lupton, R. H., Bernardi, M., Blanton, M. R., Burles, S. M., Castander, F. J., Connolly, A. J., Eisenstein, D. J., Frieman, J. A., Hennessy, G. S., et al. (2002) · The Astronomical Journal · doi:10.1086/324741 · Cited by 2,389
The 2.5 m Telescope of the Sloan Digital Sky Survey
Gunn, J. E., Siegmund, W. A., Mannery, E. J., Owen, R. E., Hull, C. L., Leger, R. F., Carey, L. N., Knapp, G. R., York, D. G., Boroski, W. N., et al. (2006) · The Astronomical Journal · doi:10.1086/500975 · Cited by 2,373
Eisenstein, D. J., Weinberg, D. H., Agol, E., Aihara, H., Prieto, C. A., Anderson, S. F., Arns, J. A., Aubourg, É., Bailey, S., Balbinot, E., et al. (2011) · The Astronomical Journal · doi:10.1088/0004-6256/142/3/72 · Cited by 2,148
Research works printed but not linked: 10
- Bischoff, 1999, A&A, 345, 49
- Dawson K. S. . 2015. preprint (arXiv:1508.04473). · arXiv
- Ivezic Z. . 2008. preprint (arXiv:0805.2366). · arXiv
- Kaiser N. . Proc. SPIE Conf. Ser. Vol. 4836, Survey and Other Telescope Technologies and Discoveries. Tyson J. A. Wolff S. , editors. SPIE; Bellingham; 2002. p. 154.
- Kimball A. E. Ivezić Ž. Proc. IAU Symp. 304, Multiwavelength AGN Surveys and Studies. Mickaelian A. M. Sanders D. B. , editors. Cambridge Univ. Press; Cambridge; 2014. p. 238.
- Lupton R. Gunn J. E. Ivezić Z. Knapp G. R. Kent S. ASP Conf. Ser. Vol. 238, Astronomical Data Analysis Software and Systems X. Harnden F. R. Jr Primini F. A. Payne H. E. , editors. Astron. Soc. Pac.; San Francisco; 2001. p. 269.
- Margala D. Kirkby D. Dawson K. Bailey S. Blanton M. Schneider D. P. 2015. preprint (arXiv:1506.04790). · arXiv
- Rosen S. R. . 2015. preprint (arXiv:1504.07051). · arXiv
- Ruan J. J. . 2015. preprint (arXiv:1509.03634). · arXiv
- Shakura, 1973, A&A, 24, 337
Cited by
Sorted by citations
Items 201–300 of 323
Selection of optically variable active galactic nuclei via a random forest algorithm
Cicco, D. D., Zazzaro, G., Cavuoti, S., Paolillo, M., Longo, G., Petrecca, V., Saccheo, I., & Sanchéz-Sáez, P. (2025) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202453630 · Cited by 9
X-ray quasi-periodic eruptions from two previously quiescent galaxies
Arcodia, R., Merloni, A., Nandra, K., Büchner, J., Salvato, M., Pasham, D. R., Remillard, R. A., Comparat, J., Lamer, G., Ponti, G., et al. (2021) · DSpace@MIT (Massachusetts Institute of Technology) · Cited by 9
Wang, J., Zheng, W. K., Xu, D., Brink, T. G., Filippenko, A. V., Gao, C. D., Sun, S. S., & Wei, J. Y. (2021) · Research in Astronomy and Astrophysics · doi:10.1088/1674-4527/ac3477 · Cited by 9
Pflugradt, J., Ichikawa, K., Akiyama, M., Kokubo, M., Vijarnwannaluk, B., Noda, H., & Chen, X. (2022) · The Astrophysical Journal · doi:10.3847/1538-4357/ac8ff3 · Cited by 9
The long-term broad-line responsivity in MKN 110
Homan, D., Lawrence, A., Ward, M. J., Bruce, A., Landt, H., MacLeod, C., Elvis, M., Wilkes, B. J., Huchra, J., & Peterson, B. M. (2022) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stac3571 · Cited by 9
Self-citationPS1-13cbe: the rapid transition of a Seyfert 2 to a Seyfert 1
Katebi, R., Chornock, R., Berger, E., Jones, D. O., Lunnan, R., Margutti, R., Rest, A., Scolnic, D. M., Burgett, W. S., Kaiser, N., et al. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz1552 · Cited by 9
Self-citationSuspended and Restored Activities of a Nearby Supermassive Black Hole
Wang, J., Xu, D. W., Sun, S. S., Feng, Q. C., Li, T. R., Xiao, P. F., & Wei, J. Y. (2020) · The Astronomical Journal · doi:10.3847/1538-3881/ab85cc · Cited by 9
Guo(郭恒潇), H., Malkan, M. A., Gu, M., Li, L., Prochaska, J. X., Ma, J., You, B., Zafar, T., & Liao, M. (2016) · The Astrophysical Journal · doi:10.3847/0004-637x/826/2/186 · Cited by 9
Evolution of MHD torus and mass outflow around spinning AGNs
Aktar, R., Pan, K.-C., & Okuda, T. (2023) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stad3287 · Cited by 8
Marin, F., & Hutsemékers, D. (2020) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201936123 · Cited by 8
Discovery of a new extreme changing-state quasar with 4 mag variation, SDSS J125809.31+351943.0
Nagoshi, S., Iwamuro, F., Wada, K., & Saito, T. (2020) · Publications of the Astronomical Society of Japan · doi:10.1093/pasj/psaa108 · Cited by 8
Chen, X., Ichikawa, K., Noda, H., Kawamuro, T., Kawaguchi, T., Toba, Y., & Akiyama, M. (2020) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/abca30 · Cited by 8
Guo, H., Malkan, M. A., Gu, M., Li, L., Prochaska, J. X., Ma, J., You, B., Zafar, T., & Liao, M. (2016) · eScholarship (California Digital Library) · Cited by 8
Discovering changing-look AGN in the 6dF Galaxy Survey using ATLAS light curves
Amrutha, N., Wolf, C., Onken, C. A., Hon, W. J., Lai, S., Tonry, J. L., & Webster, R. L. (2024) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stae2470 · Cited by 7
The First Identification of Lyα Changing-look Quasars at High Redshift in DESI
Guo, W.-J., Pan, Z., Siudek, M., Aguilar, J., Ahlen, S. P., Bianchi, D., Brooks, D., Claybaugh, T., Dawson, K., de la Macorra, A., et al. (2025) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/adb426 · Cited by 7
An extremely luminous flare recorded from a supermassive black hole
Graham, M. J., McKernan, B., Ford, K. E. S., Stern, D. K., Cantiello, M., Drake, A. J., Ding, Y., Kasliwal, M. M., Koss, M., Margutti, R., et al. (2025) · Nature Astronomy · doi:10.1038/s41550-025-02699-0 · Cited by 7
Shen, Y.-H., Lu, K.-X., Guo, W.-J., Li, S., Feng, H.-C., Zhang, Y., Xi, W.-Z., Wang, J.-G., & Bai, J.-M. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/ae1299 · Cited by 7
Liang, W.-W., Shu, X., Wang, J. X., Tan, Y., Zhang, W. J., Sun, L., Jiang, N., & Dou, L. (2022) · Journal of High Energy Astrophysics · doi:10.1016/j.jheap.2022.01.002 · Cited by 7
Schmitt, J., Adami, C., Dennefeld, M., Agneray, F., Basa, S., Brunei, J. C., Buat, V., Burgarella, D., Carvalho, C., Castagnoli, G., et al. (2024) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202449254 · Cited by 7
Kokubo, M. (2016) · Publications of the Astronomical Society of Japan · doi:10.1093/pasj/psw050 · Cited by 7
Observational Nonstationarity of AGN Variability: The Only Way to Go Is Down!
Čaplar, N., Peña, T., Johnson, S. D., & Greene, J. E. (2020) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ab6a11 · Cited by 7
The Sloan Digital Sky Survey Reverberation Mapping Project: Photometric g and i Light Curves
Kinemuchi, K., Hall, P. B., McGreer, I. D., Kochanek, C. S., Grier, C. J., Trump, J. R., Shen, Y., Brandt, W. N., Wood-Vasey, W. M., Fan, X., et al. (2020) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/aba43f · Cited by 7
Self-citationMasterson, M., Kara, E., Pasham, D. R., D’Orazio, D. J., Walton, D. J., Fabian, A. C., Lucchini, M., Remillard, R. A., Arzoumanian, Z., Burkhonov, O. A., et al. (2023) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/acbea9 · Cited by 7
Ren, W., Wang, J., Cai, Z.-Y., & Hu, X.-F. (2024) · The Astrophysical Journal · doi:10.3847/1538-4357/ad17cb · Cited by 7
SkyMapper colours of Seyfert galaxies and Changing-Look AGN
Wolf, C., Golding, J., Hon, W. J., & Onken, C. A. (2020) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/staa2794 · Cited by 7
Long-term Variability of the Composite Galaxy SDSS J103911-000057: A True Type-2 AGN Candidate
XueGuang, Z., YingFei, Z., PeiZhen, C., BaoHan, W., Yi-Li, L., & HaiChao, Y. (2021) · The Astrophysical Journal · doi:10.3847/1538-4357/ac23c8 · Cited by 7
SALT long-slit spectroscopy of quasar HE 0435-4312: fast displacement of the Mg II emission line
Średzińska, J., Czerny, B., Hryniewicz, K., Krupa, M., Kurcz, A., Marziani, P., Adhikari, T. P., Basak, R., You, B., Wang, J.-M., et al. (2017) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201628257 · Cited by 7
Multiwavelength properties of changing-state active galactic nuclei
Jana, A., Ricci, C., Tortosa, A., Dimopoulos, G., Trakhtenbrot, B., Bauer, F. E., Temple, M. J., Koss, M., Gupta, K. K., Chang, H.-K., et al. (2026) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202556654 · Cited by 6
Ionizing Spotlight of Active Galactic Nucleus
Moiseev, A. V., & Smirnova, A. A. (2023) · Galaxies · doi:10.3390/galaxies11060118 · Cited by 6
Kollatschny, W., & Chelouche, D. (2024) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202451901 · Cited by 6
Broad-line active galactic nuclei in the 6dF Galaxy Survey
Hon, W. J., Webster, R. L., & Wolf, C. (2024) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stae2815 · Cited by 6
Kunert-Bajraszewska, M., Krauze, A., Kimball, A. E., Stawarz, Ł., Kharb, P., Stern, D. K., Mooley, K. P., Nyland, K., & Kozieł‐Wierzbowska, D. (2025) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/ada68f · Cited by 6
A peculiar Type II QSO identified via broad-band detection of extreme nebular line emission
Lin, Y.-H., Scarlata, C. M., Hayes, M., Feltre, A., Charlot, S., Bongiorno, A., Väisänen, P., & Mogotsi, M. K. (2021) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stab2978 · Cited by 6
Duffy, L., Eracleous, M., Runnoe, J. C., Ruan, J. J., Anderson, S. F., Dimassimo, S., Green, P. J., & LaMassa, S. M. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/adae0b · Cited by 5
Jana, A., Ricci, C., Venselaar, S. M., Chang, C.-S., Liao, M., Inoue, Y., Kawamuro, T., Bauer, F. E., Shablovinskaya, E. S., Trakhtenbrot, B., et al. (2025) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202554491 · Cited by 5
Suzuguchi, T., Omiya, H., & Takeda, H. (2025) · Publications of the Astronomical Society of Japan · doi:10.1093/pasj/psaf132 · Cited by 5
An X-ray view of the ambiguous nuclear transient AT2019pev
Yu, Z., Kochanek, C. S., Mathur, S., Auchettl, K., Grupe, D., & Holoien, T. W. S. (2022) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stac2073 · Cited by 5
Evidence for microlensing by primordial black holes in quasar broad emission lines
Hawkins, M. R. S. (2023) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stad3346 · Cited by 5
Wada, K., Iwamuro, F., Nagoshi, S., & Saito, T. (2021) · Publications of the Astronomical Society of Japan · doi:10.1093/pasj/psab025 · Cited by 5
Discovery of a quasar with double-peaked broad balmer emission lines
Terwel, J., & Jonker, P. G. (2022) · Monthly Notices of the Royal Astronomical Society Letters · doi:10.1093/mnrasl/slac026 · Cited by 5
SALT long-slit spectroscopy of quasar HE 0435-4312: fast displacement of the Mg II emission line
Średzińska, J., Czerny, B., Hryniewicz, K., Krupa, M., Kurcz, A., Marziani, P., Adhikari, T. P., Basak, R., You, B., Wang, J., et al. (2017) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361/201628257/pdf · Cited by 5
SDSS-IV MaNGA: Identification and multiwavelength properties of Type-1 AGN in the DR15 sample
Cortes-Suárez, E., Negrete, C. A., Hernández-Toledo, H. M., Ibarra-Medel, H. J., & Lacerna, I. (2022) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stac1505 · Cited by 5
X-ray spectral evolution in an X-ray changing-look AGN NGC 1365 with variable column density
Liu, H., Wu, Q., Xue, Y., Wang, T., Yang, J., Guo, H., & He, Z. (2021) · Research in Astronomy and Astrophysics · doi:10.1088/1674-4527/21/8/199 · Cited by 5
Testing colour–magnitude pattern as a method in the search for changing-look AGNs
Zhu, L., Wang, Z., Devanand, P. U., Gupta, A. C., Dogra, K., Li, J., Zhang, J., Ji, S.-H., & Sun, S.-S. (2024) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stae2774 · Cited by 4
Côté, P., Woods, T. E., Hutchings, J. B., Rhodes, J. D., Sánchez-Janssen, R., Scott, A. D., Pazder, J., Amenouche, M., Balogh, M. L., Blouin, S., et al. (2025) · Journal of Astronomical Telescopes Instruments and Systems · doi:10.1117/1.jatis.11.4.042202 · Cited by 4
Searching for Changing-look AGN Candidates through Optical and Mid-infrared Variability
chen, Z., Guo, W.-J., Zou, H., Liu, M. Y., & Yuan, Q. (2025) · Research in Astronomy and Astrophysics · doi:10.1088/1674-4527/ade952 · Cited by 4
Long-Term Optical Monitoring of Broad-Line AGNs (LoTerm AGN): Case Study of NGC 3516
Ilić, D., Popović, L. Č., Burenkov, A. N., Shablovinskaya, E. S., Malygin, E. A., Uklein, R. I., Moiseev, A. V., Oparin, D. V., Patiño-Álvarez, V., Chavushyan, V., et al. (2023) · Physics · doi:10.3390/physics6010003 · Cited by 4
The relation between quasars’ optical spectra and variability
Nagoshi, S., & Iwamuro, F. (2022) · Publications of the Astronomical Society of Japan · doi:10.1093/pasj/psac063 · Cited by 4
A candidate of high-z central tidal disruption event in quasar SDSS J000118.70+003314.0
Gu, Y., Zhang, X.-G., Chen, X.-Q., Yang, X., & Liang, E. (2024) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stae2816 · Cited by 4
Kokubo, M. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx080 · Cited by 4
Lawther, D., Vestergaard, M., Raimundo, S. I., Fan, X., & Koay, J. Y. (2025) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/staf424 · Cited by 3
Sleeping Giants Arise: Monitoring the Return of Three Changing-look Quasars to Their High States*
Duffy, L., Eracleous, M., Ruan, J. J., Yang, Q., & Runnoe, J. C. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/adeb73 · Cited by 3
A Sample of He II λ 4686 “Changing-look” Quasars
Lu, W., & Wang, J. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/ae11a2 · Cited by 3
Son, S., Kim, M., Ho, L. C., & Li, R. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/ae1ef1 · Cited by 3
Chen, Z.-Q., Jin, J., Guo, W.-J., Sun, S.-X., Pan, Z., Liu, C.-X., Cheng, H., Hu, J.-W., Sheng, Z.-F., Zou, H. Z. H., et al. (2026) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/ae23cb · Cited by 3
Systematic Analysis of Changing-Look Active Galactic Nucleus Variability Using ZTF Light Curves
Wang, H., Wu, X.-B., Yao, N., Lyu, B., Pang, Y., Fu, Y., Zhu, R., & Yang, Q. (2026) · The Astrophysical Journal · doi:10.3847/1538-4357/ae1fdc · Cited by 3
Scepi, N., Knigge, C., Mosallanezhad, A., Long, K. S., Matthews, J. H., Sim, S. A., & WALLIS, A. K. (2026) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stag592 · Cited by 3
Changing-look Active Galactic Nuclei Powered by Disk Tearing
Kaaz, N., Liska, M., Ward, C., & Davelaar, J. (2026) · The Astrophysical Journal · doi:10.3847/1538-4357/ae665a · Cited by 3
X-Ray Unveiling Events in a z ≈ 1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South
Yu, L.-M., Luo, B., Brandt, W. N., Bauer, F. E., Cicco, D. D., Fabian, A. C., Gilli, R., Koekemoer, A. M., Paolillo, M., Schneider, D. P., et al. (2023) · The Astrophysical Journal · doi:10.3847/1538-4357/acc17e · Cited by 3
Byun, W., Kim, M., Sheen, Y., Lee, D., Ho, L. C., Ko, J., Seon, K., Shim, H., Kim, D., Kim, Y., et al. (2023) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/acebe4 · Cited by 3
Saha, T., Markowitz, A. G., Homan, D., Krumpe, M., Hämmerich, S., Czerny, B., Graham, M., Frederick, S., Gromadzki, M., Gezari, S., et al. (2025) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202347985 · Cited by 3
Komossa, S., Grupe, D., Gallo, L., Poulos, P., Blue, D. M., Kara, E., Kriss, G. A., Longinotti, A. L., Parker, M. L., & Wilkins, D. (2020) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361/202039098/pdf · Cited by 3
The variability of the broad line profiles of SDSS J1430+2303
Hoshi, A., Yamada, T., & Ohta, K. (2024) · Publications of the Astronomical Society of Japan · doi:10.1093/pasj/psad083 · Cited by 3
A Sandwich Model for Changing-look Active Galactic Nuclei
Ma, Q. M., Gu, W., Cai, Z.-Y., Cao, X., Wang, J., Zhang, Z.-X., & Sun, M. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/add346 · Cited by 3
A kinetic model of jet-corona coupling in accreting black holes
Mehlhaff, J., Cerutti, B., & Crinquand, B. (2025) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202453561 · Cited by 3
Learning Transient Universe in Near-ultraviolet by Wide-angle Cameras
Wang, J., Liang, E. W., & Wei, J. Y. (2019) · Publications of the Astronomical Society of the Pacific · doi:10.1088/1538-3873/ab2749 · Cited by 3
An unusual mid-infrared flare in a type 2 AGN: An obscured turning-on AGN or tidal disruption event?
Yang, Q., Shen, Y., Liu, X., Wu, X., Jiang, L., & Jinyi, S. (2019) · MPG.PuRe (Max Planck Society) · Cited by 3
Oknyansky, V. L., Brotherton, M. S., Tsygankov, S. S., Додин, А. В., Tatarnikov, A. M., Du, P., Burlak, M. A., Ikonnikova, N. P., Metlov, V. G., Belinski, A., et al. (2024) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stae2707 · Cited by 2
Guo, W.-J., Zhang, Z.-X., Moiseev, A. V., Fawcett, V. A., Chen, Y.-J., Liu, J.-R., Musin, M., Kotov, S., Semena, A. N., Cheng, H., et al. (2025) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202452354 · Cited by 2
Utilizing Maximum Variability to Discern TDE Emission from AGN Flares
Mondal, S., & French, K. D. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/ae122c · Cited by 2
Lyu, B., Wu, X.-B., Jin, J., Fu, Y., Pang, Y., Wang, H., Zhu, R., Yao, S., Ai, Y. L., Zhang, Y.-X., et al. (2026) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/ae2b6e · Cited by 2
Guo, W.-J., Fawcett, V. A., Siudek, M., Li, Y., Cheng, C., Panda, S., Pan, Z., Sun, S., Greenwell, C., Alexander, D. M., et al. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/ae1d7b · Cited by 2
Gilbert, O., Ruan, J. J., Duffy, L. M., Eracleous, M., Anderson, S. F., Green, P. J., Haggard, D., Plotkin, R. M., Runnoe, J. C., & Sobolewska, M. A. (2026) · The Astrophysical Journal · doi:10.3847/1538-4357/ae5191 · Cited by 2
Tidal Disruption Events and stellar-mass black holes in OGLE and Gaia surveys
Wyrzykowski, Ł., Hamanowicz, A., & Rybicki, K. A. (2016) · Proceedings of the International Astronomical Union · doi:10.1017/s1743921317001636 · Cited by 2
A Changing-Look AGN to Be Probed by X-ray Polarimetry
Agı́s-González, B., Hutsemékers, D., & MINIUTTI, G. (2018) · Galaxies · doi:10.3390/galaxies6020052 · Cited by 2
Bon, E., Marziani, P., Jovanović, P., & Bon, N. (2019) · Atoms · doi:10.3390/atoms7010026 · Cited by 2
Extreme Variability Quasars from the Sloan Digital Sky Survey and the Dark Energy Survey
Rumbaugh, N., Shen, Y., Morganson, E., Liu, X., Banerji, M., McMahon, R. G., Abdalla, F. B., Benoit-Lévy, A., Bertin, E., Brooks, D., et al. (2018) · The Astrophysical Journal · doi:10.3847/1538-4357/aaa9b6 · Cited by 2
A Surprising Excess of Radio Emission in Extremely Stable Quasars: A Unique Clue to Jet Launching?
Kang, W.-Y., Wang, J., Cai, Z.-Y., Wang, H.-C., Ren, W., Liao, M., Yuan, F., Zdziarski, A. A., & Cao, X. (2024) · The Astrophysical Journal · doi:10.3847/1538-4357/ad5a0c · Cited by 2
Navigating AGN variability with self-organizing maps
Maruccia, Y., Cicco, D. D., Cavuoti, S., Riccio, G., Sanchéz-Sáez, P., Paolillo, M., Borrelli, N. L., Crupi, R., & Brescia, M. (2025) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202553866 · Cited by 2
A black hole changes its feeding habits
LaMassa, S. M. (2016) · Nature · doi:10.1038/nature20480 · Cited by 2
Dramatic X-ray spectral variability of a Compton-thick type-1 QSO at z ∼ 1
Simm, T., Büchner, J., Merloni, A., Nandra, K., Shen, Y. G., Erben, T., Coil, A. L., Willmer, C. N. A., & Schneider, D. P. (2018) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/sty2208 · Cited by 2
Active Galactic Nucleus Variability in the Age of Rubin
Creque‐Sarbinowski, C., Kamionkowski, M., & Zhou, B. (2022) · The Astrophysical Journal · doi:10.3847/1538-4357/ac9eb2 · Cited by 2
Quasars with flare/eclipse-like variability identified in ZTF
Zheng, Z., Shi, Y., Jin, S., Dannerbauer, H., Gu, Q., Li, X., & Yu, X. (2024) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stae1036 · Cited by 1
AT 2021hdr: A candidate tidal disruption of a gas cloud by a binary super massive black hole system
Hernández-García, L., Muñoz-Arancibia, A., Lira, P., Bruni, G., Cuadra, J., Arévalo, P., Sanchéz-Sáez, P., Bernal, S., Bauer, F. E., Catelan, M., et al. (2024) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202451305 · Cited by 1
Adhikari, T. P., Mondal, S., He, Z., Różáńska, A., & Hryniewicz, K. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/ade056 · Cited by 1
A possible shutting-down event of mass accretion in an active galactic nucleus at z ∼ 1.8
Morokuma, T., Schramm, M., Kawaguchi, T., González, J. B., Acosta-Pulido, J. A., Castro-Rodríguez, N., Morokuma-Matsui, K., Koshida, S., Furusawa, J., Furusawa, H., et al. (2025) · Publications of the Astronomical Society of Japan · doi:10.1093/pasj/psaf115 · Cited by 1
Mountrichas, G., Carrera, F. J., Quintin, E., Viitanen, A., Corral, A., & Webb, N. A. (2026) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202558424 · Cited by 1
Emission-line Variable Active Galactic Nuclei at Cosmic Noon from HETDEX
Liu, C., Kong, F., Cooper, E. M., Davis, D., 郭, W.-J. 威. G., Schneider, D. P., Xu, L., Gebhardt, K., Hill, G. J., Kollatschny, W., et al. (2026) · The Astrophysical Journal Supplement Series · doi:10.3847/1538-4365/ae5803 · Cited by 1
Directly Tracking the Rebrightening of a Supermassive Black Hole Accretion Disk
Middei, R., Nardini, E., Done, C., Lusso, E., Vagnetti, F., Risaliti, G., Piconcelli, E., Bianchi, S., Matzeu, G. A., Falcão, A. T., et al. (2026) · The Astrophysical Journal · doi:10.3847/1538-4357/ae6f0e · Cited by 1
Self-citationAkiba, T., Dexter, J., Brandt, W. N., Ho, L. C., Homayouni, Y., Schneider, D. P., Shen, Y. G., & Trump, J. R. (2023) · The Astrophysical Journal · doi:10.3847/1538-4357/ace1e1 · Cited by 1
Characterizing some Gaia Alerts with LAMOST and SDSS
Huo, Z., Dennefeld, M., Liu, X. W., Pursimo, T., & Zhang, T. (2020) · Astrophysics and Space Science · doi:10.1007/s10509-020-03804-7 · Cited by 1
Ivezić, Ž. (2016) · Zenodo (CERN European Organization for Nuclear Research) · doi:10.5281/zenodo.44697
Large Synoptic Survey Telescope Town Hall
Willman, B. (2016) · Zenodo (CERN European Organization for Nuclear Research) · doi:10.5281/zenodo.44768
The Lsst Data Processing Software Stack
Jenness, T. (2016) · American Astronomical Society Meeting Abstracts #227 · doi:10.5281/zenodo.44634
Lawrence, A. (2019) · Undergraduate lecture notes in physics · doi:10.1007/978-3-030-04544-9_12
Self-citationA New Population of Highly Energetic Nuclear Transients
Kankare, E., Kotak, R., Mattila, S., & Lundqvist, P. (2017) · Proceedings of the International Astronomical Union · doi:10.1017/s1743921318002387
Spectacularly rapid and regular X-ray eruptions observed from an active galaxy
Czerny, B. (2019) · Nature · doi:10.1038/d41586-019-02652-y
A status report on AGN variability
Lira, P. (2019) · Proceedings of the International Astronomical Union · doi:10.1017/s1743921320002690
Ye, W., Jun, Y., & Sun, X. (2023) · Chinese Astronomy and Astrophysics · doi:10.1016/j.chinastron.2023.06.007
Polarization Properties of BlazarsPreprint
Chen, G., Liang, J., Zeng, X., Zhang, Z., Ye, X., Xiao, H., Pei, Z. Y., & Fan, J. H. (2023) · Research Square · doi:10.21203/rs.3.rs-3206072/v1
Metadata
- Authors
- MacLeod, C. L., Ross, N. P., Lawrence, A., Goad, M., Horne, K., Burgett, W., Chambers, K. C., Flewelling, H., Hodapp, K., Kaiser, N., Magnier, E., Wainscoat, R., & Waters, C.
- Affiliations
- Royal Observatory (GB)
- University of Leicester (GB)
- University of Hawaiʻi at Mānoa (US)
- Corresponding author
- MacLeod, Chelsea L.
- ORCID
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2016-01-20
- Volume
- 457
- Issue
- 1
- Pages
- 389-404
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2233780967
- Cited by
- 323
- References
- 147
- Citations by year
- 2026: 26 · 2025: 38 · 2024: 27 · 2023: 30 · 2022: 21 · 2021: 37 · 2020: 38 · 2019: 36 · 2018: 30 · 2017: 25 · 2016: 15
- FWCI
- 16.90
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Monthly Notices of the Royal Astronomical Society (publishedVersion)
- arXiv (Cornell University) (acceptedVersion)
- Figshare (submittedVersion, cc-by)
- Leicester Research Archive (University of Leicester) (submittedVersion)
- HighWire Press Open Archive (submittedVersion)
- Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
- St Andrews Research Repository (St Andrews Research Repository) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (1313422, 0909182, 1238877)
- Smithsonian Institution
- U.S. Department of Energy
- National Aeronautics and Space Administration (AST-1313422, NNG05GF22G, AST-0909182, NNX08AR22G, AST-1238877)
- Alfred P. Sloan Foundation (NNX08AR22G)
- Yale University
- Vanderbilt University
- Princeton University
- Ohio State University
- Harvard University
- University of Washington
- Johns Hopkins University
- University of Pittsburgh
- Carnegie Mellon University
- Case Western Reserve University
- Drexel University
- Universität Basel
- University of Portsmouth
- New Mexico State University
- Space Telescope Science Institute (NNX08AR22G)
- York University
- Queen's University Belfast
- Durham University
- Chinese Academy of Sciences
- Queen's University
- Max-Planck-Gesellschaft
- National Central University
- Eötvös Loránd Tudományegyetem
- Max-Planck-Institut für Astronomie
- Office of Science
- College of Engineering, Michigan State University
- Smithsonian Astrophysical Observatory
- Science Mission Directorate (NNX08AR22G)
- Science and Technology Facilities Council (ST/N000757/1, ST/M001296/1, ST/L005050/1, ST/M001229/1, ST/K001000/1, ST/L00481X/1, ST/J004626/1)
- U.S. Naval Observatory
- Planetary Science Division (NNX08AR22G)
- Fermilab
- Brookhaven National Laboratory
- Lawrence Berkeley National Laboratory
- Los Alamos National Laboratory
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Keywords
- changing-look quasars, broad emission lines, quasar variability, interstellar extinction, quasar light curves, high-redshift quasars
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
