Discovery of a new quasar: SDSS J022155.26‐064916.6

Abstract

We report the discovery of a new quasar: SDSS J022155.26-064916.6. This object was discovered while reducing spectra of a sample of stars being considered as spectrophotometric standards for the Dark Energy Survey. The flux and wavelength calibrated spectrum is presented with four spectral lines identified. From these lines, the redshift is determined to be z ≈ 0.806. In addition, the rest-frame u-, g-, and r-band luminosity, determined using a k-correction obtained with synthetic photometry of a proxy QSO, are reported as 7.496 × 10 13 L ⊙ , 2.049 × 10 13 L ⊙ , and 1.896 × 10 13 L ⊙ , respectively.

Serendipitous discovery of a brightening quasar at redshift z = 3.68

“…During a campaign to add spectro-photometric standard stars to the calibration plan of the Multi-Unit Spectroscopic Explorer, MUSE (Bacon et al 2010), we have serendipitously discovered a quasar at redshift 3.68 which is most suitable for RM studies. Robertson et al (2017) recently reported a similar discovery of a low redshift quasar in this journal under an analogous calibration campaign for the Dark Energy Survey.…”