Very large array 1.4GHz catalogs of the A370 and A2390 cluster fields

摘要

We present 1.4GHz catalogs for the cluster fields A370 and A2390 observed with the Very Large Array. These are two of the deepest radio images of cluster fields ever taken. The A370 image covers an area of 40′ × 40′ with a synthesized beam of 17 and a noise level of ～5.7 μJy near the field center. The A2390 image covers an area of 34′ × 34′ with a synthesized beam of 14 and a noise level of ～5.6 μJy near the field center. We catalog 200 redshifts for the A370 field. We construct differential number counts for the central regions (radius < 16′) of both clusters. We find that the faint (S_(1.4 GHz) < 3 mJy) counts of A370 are roughly consistent with the highest blank field number counts, while the faint number counts of A2390 are roughly consistent with the lowest blank field number counts. Our analyses indicate that the number counts are primarily from field radio galaxies. We suggest that the disagreement of our number counts can be largely attributed to cosmic variance.