PKS 1519-273

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PKS 1519-273
PKS 1519-273 DSS image.jpg
The BL Lacertae object PKS 1519-273.
Observation data (J2000.0 epoch)
Constellation Libra
Right ascension 15h 22m 37.676s
Declination −27° 30′ 10.786″
Redshift 1.297000
Heliocentric radial velocity 388,831 km/s
Distance 8.529 Gly
Apparent magnitude  (V)18.5
Apparent magnitude  (B)18.72
Characteristics
Type BLLAC
Other designations
NVSS J152237-273010, 4FGL J1522.6-2730, IRCF J152237.6-273010, PKS J1522-2730

PKS 1519-273 is a BL Lacertae object located in the constellation of Libra. Its redshift is (z) 1.297 [1] and was first discovered by Very Large Array (VLA) as a strong extragalactic radio source in 1981 [2] The radio spectrum of PKS 1519-273 is flat, leading to its classification as a flat-spectrum radio source. [3] [4]

Contents

Description

PKS 1519-273 is an intraday variable source. It displays significant variations in both linear and circular polarization at centimeter wavelengths. [5] [6] When observed in August 2000, its circular polarization was found to differ between frequencies of 1.4 and 8.6 GHz on an hour to day timescale. According to scientists who studied it, the variability likely originated from interstellar scintillation of a compact source component containing about 3.8% of the circular polarization. [7] Irregular variability was detected in PKS 1519-273 on hourly timescales, with the object showing flux changes at higher amplitudes of 8.6 and 4.8 GHz. These flux changes were subsequently accompanied by anticorrelated polarization variability. [8]

The source of PKS 1519-273 is found to be compact. It has a slight extended structure located in the west direction with an unresolved radio core based on Very Long Baseline Interferometry observations. [9] [10] It is estimated to have a flux density of 2.2 Jansky, a brightness temperature that is greater than 3.2 x 1012 Kelvin and an estimated size of 0.25 milliarcseconds. [10] [11]

PKS 1519-273 is classified as a blazar according to an optical polarimetry study conducted in 1988, with an inverted spectrum during flaring periods. [12] [13] Radio variability was also detected by Australia Telescope Compact Array, with its mean flux density shifting between 1.8 and 2.2 Jansky. [14] In October 2023, it showed gamma ray activity, which was detected by Large Area Telescope. [15]

References

  1. ↑ Sbarufatti, B.; Treves, A.; Falomo, R.; Heidt, J.; Kotilainen, J.; Scarpa, R. (February 2005). "ESO Very Large Telescope Optical Spectroscopy of BL Lacertae Objects. I. New Redshifts". The Astronomical Journal. 129 (2): 559–566. arXiv: astro-ph/0410692 . Bibcode:2005AJ....129..559S. doi:10.1086/427138. ISSN   0004-6256.
  2. ↑ Ulvestad, J.; Johnston, K.; Perley, R.; Fomalont, E. (July 1981). "A VLA survey of strong radio sources". The Astronomical Journal. 86: 1010–1035. Bibcode:1981AJ.....86.1010U. doi:10.1086/112977. ISSN   0004-6256.
  3. ↑ Siebert, J.; Brinkmann, W.; Drinkwater, M. J.; Yuan, W.; Francis, P. J.; Peterson, B. A.; Webster, R. L. (November 1998). "X-ray properties of the Parkes sample of flat-spectrum radio sources: dust in radio-loud quasars?". Monthly Notices of the Royal Astronomical Society. 301 (1): 261–279. arXiv: astro-ph/9808065 . Bibcode:1998MNRAS.301..261S. doi: 10.1046/j.1365-8711.1998.02019.x . ISSN   0035-8711.
  4. ↑ Veron-Cetty, M.-P.; Veron, P. (September 1993). "Spectroscopic observations of sixteen BL Lacertae candidates". Astronomy and Astrophysics Supplement Series. 100: 521–529. Bibcode:1993A&AS..100..521V. ISSN   0365-0138.
  5. ↑ Bennett, W.; Macquart, J. P.; Johnston, H.; Jauncey, D. (December 2005). "Circular Polarization in PKS 1519-273". American Astronomical Society Meeting Abstracts. 207: 127.02. Bibcode:2005AAS...20712702B.
  6. ↑ Ruszkowski, Mateusz; Begelman, Mitchell C. (2002-07-10). "Circular Polarization from Stochastic Synchrotron Sources". The Astrophysical Journal. 573 (2): 485–495. arXiv: astro-ph/0112090 . Bibcode:2002ApJ...573..485R. doi:10.1086/340659. ISSN   0004-637X.
  7. ↑ Macquart, J.-P.; Kedziora-Chudczer, Lucyna; Rayner, David P.; Jauncey, David L. (August 2000). "Strong, Variable Circular Polarization in PKS 1519−273". The Astrophysical Journal. 538 (2): 623–627. Bibcode:2000ApJ...538..623M. doi:10.1086/309184. ISSN   0004-637X.
  8. ↑ Kedziora-Chudczer, L. L.; Jauncey, D. L.; Wieringa, M. H.; Reynolds, J. E.; Tzioumis, A. K. (1998). "Four Southern Intraday Variable Radio Sources". International Astronomical Union Colloquium. 164: 271–272. Bibcode:1998ASPC..144..271K. doi:10.1017/s0252921100045516. ISSN   0252-9211.
  9. ↑ Zensus, J. A.; Ros, E.; Kellermann, K. I.; Cohen, M. H.; Vermeulen, R. C.; Kadler, M. (August 2002). "Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei. II. Additional Sources". The Astronomical Journal. 124 (2): 662–674. arXiv: astro-ph/0205076 . Bibcode:2002AJ....124..662Z. doi:10.1086/341585. ISSN   0004-6256.
  10. 1 2 Shen, Z.-Q.; Wan, T.-S.; Moran, J. M.; Jauncey, D. L.; Reynolds, J. E.; Tzioumis, A. K.; Gough, R. G.; Ferris, R. H.; Sinclair, M. W.; Jiang, D.-R.; Hong, X.-Y.; Liang, S.-G.; Costa, M. E.; Tingay, S. J.; McCulloch, P. M. (November 1997). "A 5-GHz Southern Hemisphere VLBI Survey of Compact Radio Sources.I.". The Astronomical Journal. 114: 1999. arXiv: astro-ph/9709128 . Bibcode:1997AJ....114.1999S. doi:10.1086/118621. ISSN   0004-6256.
  11. ↑ Dodson, R.; Fomalont, E. B.; Wiik, K.; Horiuchi, S.; Hirabayashi, H.; Edwards, P. G.; Murata, Y.; Asaki, Y.; Moellenbrock, G. A.; Scott, W. K.; Taylor, A. R.; Gurvits, L. I.; Paragi, Z.; Frey, S.; Shen, Z.-Q. (April 2008). "The VSOP 5 GHz Active Galactic Nucleus Survey. V. Imaging Results for the Remaining 140 Sources". The Astrophysical Journal Supplement Series. 175 (2): 314–355. arXiv: 0710.5707 . Bibcode:2008ApJS..175..314D. doi:10.1086/525025. ISSN   0067-0049.
  12. ↑ Impey, C. D.; Tapia, S. (October 1988). "New Blazars Discovered by Polarimetry". The Astrophysical Journal. 333: 666. Bibcode:1988ApJ...333..666I. doi:10.1086/166775. ISSN   0004-637X.
  13. ↑ Edwards, P. G.; Tingay, S. J. (2004-09-01). "New candidate GHz peaked spectrum and compact steep spectrum sources" (PDF). Astronomy & Astrophysics. 424 (1): 91–106. arXiv: astro-ph/0407010 . Bibcode:2004A&A...424...91E. doi:10.1051/0004-6361:20035749. ISSN   0004-6361.
  14. ↑ Carter, Steven J. B.; Ellingsen, Simon P.; Macquart, Jean–Pierre; Lovell, James E. J. (2009-07-01). "Annual cycles in the interstellar scintillation time–scales of PKS B1519–273 and PKS B1622–253". Monthly Notices of the Royal Astronomical Society. 396 (3): 1222–1230. arXiv: 0903.5384 . Bibcode:2009MNRAS.396.1222C. doi: 10.1111/j.1365-2966.2009.14824.x . ISSN   0035-8711.
  15. ↑ Bartolini, Chiara (October 2023). "Fermi-LAT detection of gamma-ray activity from the BL Lac source PKS 1519-273". The Astronomer's Telegram. 16313: 1. Bibcode:2023ATel16313....1B.
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