BAL quasar

BAL quasar

short for broad absorption line quasar. See quasar.
References in periodicals archive ?
Spectroscopic observations map the Mrk 509 warm absorber, study the mini-broad absorption line quasar PG 1126-041, determine the source of reddening in low ionization BAL quasars, and probe quasar winds using narrow intrinsic absorption lines.
Over the past three years, as part of SDSS-III's Baryon Oscillation Spectroscopic Survey (BOSS), the researchers specifically have been seeking out repeated spectra of BAL quasars through a program proposed by Brandt and his colleagues.
Their persistence paid off -- the research team gathered a sample of 582 BAL quasars, each of which had repeat observations over a period of between one and nine years -- a sample about 20 times larger than any that previously had been assembled.
Over the past three years, as part of SDSS-III's Baryon Oscillation Spectroscopic Survey (BOSS), the survey has been specifically seeking out repeated spectra of BAL quasars through a program proposed by Brandt and colleagues.