| Issue |
A&A
Volume 368, Number 2, March III 2001
|
|
|---|---|---|
| Page(s) | 431 - 439 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361:20010029 | |
| Published online | 15 March 2001 | |
Search for new flat-spectrum radio sources
1
Metsähovi radio research station, Helsinki University of Technology, 02540 Kylmälä, Finland
2
Tuorla Observatory, 21500 Piikkiö, Finland
Corresponding author: H. Teräsranta, hte@alpha.hut.fi
Received:
15
November
2000
Accepted:
19
December
2000
22 GHz continuum observations with the Met sähovi Radio telescope are used to identifying new flat spectrum radio sources selected from lower frequency survey data. The sample is complete to sources with a flux higher than 0.5 Jy at
1.4 GHz, 
between 1.4 and 4.85 GHz, declination from 0 to +75 degrees and sources more than 20o from the galactic plane. Additional strong sources from the 5 GHz survey
were observed to get the sample as complete as possible down to 1.0 Jy at 22 GHz
for extrapolation of source counts to lower flux levels. The new flat spectrum sources will be added to our monitoring sample and their duty cycle will be studied for the coming γ-ray observatiories AGILE and GLAST.
Key words: galaxies: active / BL Lacertae objects: general / quasars: general / radio continuum: galaxies / radio continuum: general
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.