Optical study of PKS B1322-110, the intra-hour variable radio source
Observations with the Australia Telescope Compact Array revealed intra-hour variations in the radio source PKS B1322-110 (Bignall et al. 2019). As part of an optical follow-up, we obtained Gemini Halpha and Halpha continuum (HalphaC) images of the PKS B1322-110 field. A robust 19-sigma detection of...
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| creator | Madrid, Juan P Tuntsov, Artem V Schirmer, Mischa Walker, Mark A Donzelli, Carlos J Bannister, Keith W Bignall, Hayley E Stevens, Jamie Reynolds, Cormac Johnston, Simon |
| description | Observations with the Australia Telescope Compact Array revealed intra-hour variations in the radio source PKS B1322-110 (Bignall et al. 2019). As part of an optical follow-up, we obtained Gemini Halpha and Halpha continuum (HalphaC) images of the PKS B1322-110 field. A robust 19-sigma detection of PKS B1322-110 in the Halpha-HalphaC image prompted us to obtain the first optical spectrum of PKS B1322-110. With the Gemini spectrum we determine that PKS B1322-110 is a flat-spectrum radio quasar at a redshift of z=3.007 +/- 0.002. The apparent flux detected in the Halpha filter is likely to originate from HeII emission redshifted precisely on the Galactic Halpha narrow-band filter. We set upper limits on the emission measure of the Galactic plasma, for various possible cloud geometries. |
| doi_str_mv | 10.48550/arxiv.2009.06447 |
| format | Article |
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| subjects | Emissions control Physics - Astrophysics of Galaxies Quasars Radio Radio sources (astronomy) Red shift |
| title | Optical study of PKS B1322-110, the intra-hour variable radio source |
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