PC 1247+3406

An optically selected quasar with a redshift of 4.897

Donald P. Schneider, Maarten Schmidt, James E. Gunn

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

This paper describes observations of PC 1247 + 3406, a quasar with a redshift of 4.897 ± 0.011. The redshift is based on three strong emission lines and the presence of substantial absorption, presumably due to "Lyman α clouds," on the blue side of the Lyman α emission line. The quasar is about the same brightness as PC 1158 + 4635, the 20th magnitude z = 4.733 quasar found in 1989. PC 1247 + 3406 was discovered in a four-filter CCD survey designed to detect quasars with redshifts between 4.0 and 5.5. The properties of PC 1247 + 3406 seem quite similar to other z> 3 quasars, although the absorption due to intervening neutral hydrogen is ≈20% less than expected. The flux in the spectrum abruptly drops at a wavelength of ≈910 Å in the rest frame of the quasar. This quick encounter with a Lyman-limit system is frequently seen in other z>4.3 quasars.

Original languageEnglish (US)
Pages (from-to)837-840
Number of pages4
JournalAstronomical Journal
Volume102
Issue number3
DOIs
StatePublished - Jan 1 1991

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quasars
hydrogen
filter
wavelength
encounters
charge coupled devices
brightness
filters
wavelengths

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Schneider, Donald P. ; Schmidt, Maarten ; Gunn, James E. / PC 1247+3406 : An optically selected quasar with a redshift of 4.897. In: Astronomical Journal. 1991 ; Vol. 102, No. 3. pp. 837-840.
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title = "PC 1247+3406: An optically selected quasar with a redshift of 4.897",
abstract = "This paper describes observations of PC 1247 + 3406, a quasar with a redshift of 4.897 ± 0.011. The redshift is based on three strong emission lines and the presence of substantial absorption, presumably due to {"}Lyman α clouds,{"} on the blue side of the Lyman α emission line. The quasar is about the same brightness as PC 1158 + 4635, the 20th magnitude z = 4.733 quasar found in 1989. PC 1247 + 3406 was discovered in a four-filter CCD survey designed to detect quasars with redshifts between 4.0 and 5.5. The properties of PC 1247 + 3406 seem quite similar to other z> 3 quasars, although the absorption due to intervening neutral hydrogen is ≈20{\%} less than expected. The flux in the spectrum abruptly drops at a wavelength of ≈910 {\AA} in the rest frame of the quasar. This quick encounter with a Lyman-limit system is frequently seen in other z>4.3 quasars.",
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PC 1247+3406 : An optically selected quasar with a redshift of 4.897. / Schneider, Donald P.; Schmidt, Maarten; Gunn, James E.

In: Astronomical Journal, Vol. 102, No. 3, 01.01.1991, p. 837-840.

Research output: Contribution to journalArticle

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T1 - PC 1247+3406

T2 - An optically selected quasar with a redshift of 4.897

AU - Schneider, Donald P.

AU - Schmidt, Maarten

AU - Gunn, James E.

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Y1 - 1991/1/1

N2 - This paper describes observations of PC 1247 + 3406, a quasar with a redshift of 4.897 ± 0.011. The redshift is based on three strong emission lines and the presence of substantial absorption, presumably due to "Lyman α clouds," on the blue side of the Lyman α emission line. The quasar is about the same brightness as PC 1158 + 4635, the 20th magnitude z = 4.733 quasar found in 1989. PC 1247 + 3406 was discovered in a four-filter CCD survey designed to detect quasars with redshifts between 4.0 and 5.5. The properties of PC 1247 + 3406 seem quite similar to other z> 3 quasars, although the absorption due to intervening neutral hydrogen is ≈20% less than expected. The flux in the spectrum abruptly drops at a wavelength of ≈910 Å in the rest frame of the quasar. This quick encounter with a Lyman-limit system is frequently seen in other z>4.3 quasars.

AB - This paper describes observations of PC 1247 + 3406, a quasar with a redshift of 4.897 ± 0.011. The redshift is based on three strong emission lines and the presence of substantial absorption, presumably due to "Lyman α clouds," on the blue side of the Lyman α emission line. The quasar is about the same brightness as PC 1158 + 4635, the 20th magnitude z = 4.733 quasar found in 1989. PC 1247 + 3406 was discovered in a four-filter CCD survey designed to detect quasars with redshifts between 4.0 and 5.5. The properties of PC 1247 + 3406 seem quite similar to other z> 3 quasars, although the absorption due to intervening neutral hydrogen is ≈20% less than expected. The flux in the spectrum abruptly drops at a wavelength of ≈910 Å in the rest frame of the quasar. This quick encounter with a Lyman-limit system is frequently seen in other z>4.3 quasars.

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