Observational Studies of High Redshift Quasars
{'Code': '03020400', 'Directorate': {'Abbreviation': 'MPS', 'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'Abbreviation': 'AST', 'LongName': 'Division Of Astronomical Sciences'}}
{'SignBlockName': 'Millissa J. Evans', 'PO_EMAI': None, 'PO_PHON': None}
The redshift cutoff of quasars will be studied by carrying out                  systematic surveys for high-redshift quasars.  It is known that                 the number of quasars of given luminosity increases with                        increasing redshift.  Beyond a redshift of 2.5 or 3, however,                   there is a drop in quasar numbers.  This phenomenon probably                    signifies the first appearance of quasars in the universe, about 2              billion years after the Big Bang.  At the present time the drop in              quasar numbers at high redshift is poorly documented.  These                    quasars are very rare.  Typically one high-redshift quasar is                   found among 10,000 stars in the sky.  The survey technique will                 involve video recording the low-dispersion spectra of                           approximately 1 million faint objects with the 200-inch telescope               at Palomar.  The objects that show emission lines will be                       selected.  Follow-up spectroscopy of all the emission-line objects              will show which of these objects are quasars as well as measure                 their redshifts.  By careful control and calibration of the                     survey, it will be possible to evaluate its completeness limits,                and thus conduct a quantitative census of high-redshift quasars.                The results will allow the evaluation of different hypotheses                   proposed to explain the sudden appearance of quasars in the early               universe.  This phenomenon may well be associated with the birth                of galaxies.
{'FirstName': 'Maarten', 'LastName': 'Schmidt', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Maarten Schmidt', 'EmailAddress': None, 'NSF_ID': '000441742', 'StartDate': '06/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'California Institute of Technology', 'CityName': 'PASADENA', 'ZipCode': '911250001', 'PhoneNumber': '6263956219', 'StreetAddress': '1200 E CALIFORNIA BLVD', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '28', 'CONGRESS_DISTRICT_ORG': 'CA28', 'ORG_UEI_NUM': 'U2JMKHNS5TG4', 'ORG_LGL_BUS_NAME': 'CALIFORNIA INSTITUTE OF TECHNOLOGY', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1217', 'Text': 'EXTRAGALACTIC ASTRON & COSMOLO'}
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