Unusual optical quiescence of the classical BL Lac object PKS 0735+178 on intranight time-scale
dc.contributor.author | Goyal, Arti | en_US |
dc.contributor.author | Gopal-Krishna, | en_US |
dc.contributor.author | Anupama, G. C. | en_US |
dc.contributor.author | Sahu, D. K. | en_US |
dc.contributor.author | Sagar, Ram | en_US |
dc.contributor.author | Britzen, S. | en_US |
dc.contributor.author | Karouzos, M. | en_US |
dc.contributor.author | Aller, Margo F. | en_US |
dc.contributor.author | Aller, Hugh D. | en_US |
dc.date.accessioned | 2010-06-01T21:53:04Z | |
dc.date.available | 2010-06-01T21:53:04Z | |
dc.date.issued | 2009-11-01 | en_US |
dc.identifier.citation | Goyal, Arti; Gopal-Krishna, ; Anupama, G. C.; Sahu, D. K.; Sagar, R.; Britzen, S.; Karouzos, M.; Aller, M. F.; Aller, H. D. (2009). "Unusual optical quiescence of the classical BL Lac object PKS 0735+178 on intranight time-scale." Monthly Notices of the Royal Astronomical Society 399(3): 1622-1632. <http://hdl.handle.net/2027.42/74920> | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.issn | 1365-2966 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/74920 | |
dc.description.abstract | We present the result of our extensive intranight optical monitoring of the well-known low-energy peaked BL Lac (LBL) object PKS 0735+178. This long-term follow-up consists of R -band monitoring for a minimum duration of ∼4 hours, on 17 nights spanning 11 years (1998–2008). Using the CCD as an N-star photometer, a detection limit of around 1 per cent was attained for the intranight optical variability (INOV). Remarkably, an INOV amplitude of ≥3 per cent on hour-like time-scale was not observed on any of the 17 nights, even though the likelihood of a typical LBL showing such INOV levels in a single session of >4 hours duration is known to be high (∼50 per cent) . Our observations have thus established a peculiar long-term INOV quiescence of this radio-selected BL Lac object. Moreover, the access to unpublished optical monitoring data of similarly high sensitivity, acquired in another programme, has allowed us to confirm the same anomalous INOV quiescence of this LBL all the way back to 1989, the epoch of its historically largest radio outburst. Here, we present observational evidence revealing the very unusual INOV behaviour of this classical BL Lac object and discuss this briefly in the context of its other known exceptional properties. | en_US |
dc.format.extent | 2683525 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | Journal compilation © 2009 RAS | en_US |
dc.subject.other | Galaxies: Active | en_US |
dc.subject.other | BL Lacertae Objects: General | en_US |
dc.subject.other | BL Lacertae Objects: Individual: PKS 0735+178 | en_US |
dc.subject.other | Galaxies: Jets | en_US |
dc.title | Unusual optical quiescence of the classical BL Lac object PKS 0735+178 on intranight time-scale | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Astronomy | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Astronomy Department, University of Michigan, Dennison Building, Ann Arbor, MI 48109-1090, USA | en_US |
dc.contributor.affiliationother | Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263 129, India | en_US |
dc.contributor.affiliationother | NCRA–TIFR, Pune University Campus, Pune 411 007, India | en_US |
dc.contributor.affiliationother | Indian Institute of Astrophysics (IIA), Bangalore 560 034, India | en_US |
dc.contributor.affiliationother | Max-Planck-Institut fÜr Radioastronomie, Auf dem HÜgel 69, 53121 Bonn, Germany | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/74920/1/j.1365-2966.2009.15385.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2966.2009.15385.x | en_US |
dc.identifier.source | Monthly Notices of the Royal Astronomical Society | en_US |
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