Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240
PKS 1424+240 is a BL-Lac blazar with unknown redshift detected at high-energy gamma rays by Fermi-LAT with a hard spectrum. It was first detected at very-high-energy by VERITAS and latter confirmed by MAGIC. Attempts to find limits on its redshift include three estimations by modeling gamma-ray obse...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_18248039_v30-July-2015_n_p_Rovero |
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todo:paper_18248039_v30-July-2015_n_p_Rovero2023-10-03T16:33:07Z Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240 Rovero, A.C. Donzelli, C. Pichel, A. Muriel, H. PKS 1424+240 is a BL-Lac blazar with unknown redshift detected at high-energy gamma rays by Fermi-LAT with a hard spectrum. It was first detected at very-high-energy by VERITAS and latter confirmed by MAGIC. Attempts to find limits on its redshift include three estimations by modeling gamma-ray observations, and one obtained by analyzing Lyb and Lyg absorption lines observed in the far-UV spectra (from HST/COS) caused by absorbing gas along the line of sight. They allowed to constrain the redshift range to 0:6<z<1:19, which places PKS 1424+240 in the very interesting condition to be one of the few candidates to be the most distant blazars detected at very-high-energy gamma rays. Redshift determination of BL-Lac objects are difficult to achieve. We have found that redshift of blazars can be determined by its association to a galaxy group or cluster. To explore this possibility for PKS 1424+240, we have carried out spectroscopic measurements with the Gemini North telescope of galaxies in its field of view. In this work we present the optical spectrum of PKS 1424+240 and show preliminary results of the blazar environment characterization. Spectroscopic redshift using the optical spectrum of PKS 1424+240 could not be determined in this work. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_18248039_v30-July-2015_n_p_Rovero |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
PKS 1424+240 is a BL-Lac blazar with unknown redshift detected at high-energy gamma rays by Fermi-LAT with a hard spectrum. It was first detected at very-high-energy by VERITAS and latter confirmed by MAGIC. Attempts to find limits on its redshift include three estimations by modeling gamma-ray observations, and one obtained by analyzing Lyb and Lyg absorption lines observed in the far-UV spectra (from HST/COS) caused by absorbing gas along the line of sight. They allowed to constrain the redshift range to 0:6<z<1:19, which places PKS 1424+240 in the very interesting condition to be one of the few candidates to be the most distant blazars detected at very-high-energy gamma rays. Redshift determination of BL-Lac objects are difficult to achieve. We have found that redshift of blazars can be determined by its association to a galaxy group or cluster. To explore this possibility for PKS 1424+240, we have carried out spectroscopic measurements with the Gemini North telescope of galaxies in its field of view. In this work we present the optical spectrum of PKS 1424+240 and show preliminary results of the blazar environment characterization. Spectroscopic redshift using the optical spectrum of PKS 1424+240 could not be determined in this work. |
| format |
CONF |
| author |
Rovero, A.C. Donzelli, C. Pichel, A. Muriel, H. |
| spellingShingle |
Rovero, A.C. Donzelli, C. Pichel, A. Muriel, H. Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240 |
| author_facet |
Rovero, A.C. Donzelli, C. Pichel, A. Muriel, H. |
| author_sort |
Rovero, A.C. |
| title |
Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240 |
| title_short |
Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240 |
| title_full |
Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240 |
| title_fullStr |
Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240 |
| title_full_unstemmed |
Redshift measurement of the BL-Lac gamma-ray blazar PKS 1424+240 |
| title_sort |
redshift measurement of the bl-lac gamma-ray blazar pks 1424+240 |
| url |
http://hdl.handle.net/20.500.12110/paper_18248039_v30-July-2015_n_p_Rovero |
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AT roveroac redshiftmeasurementofthebllacgammarayblazarpks1424240 AT donzellic redshiftmeasurementofthebllacgammarayblazarpks1424240 AT pichela redshiftmeasurementofthebllacgammarayblazarpks1424240 AT murielh redshiftmeasurementofthebllacgammarayblazarpks1424240 |
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1807319257498779648 |