I. Introduction

II. High Galactic Latitude SNR 5-7 Sources

Select sources from the final processing point source working database with that satisfy the following criteria:

• abs(glat)>70 (high galactic latitude
• dist_edge_ew>10 AND dist_edge_ns>10 (Edge boundary)
• cc_flg LIKE '000' (no artifacts identified in scan processing)
• rd_flg[1]!='0' AND rd_flg[2]!='0' AND rd_flg[3]!='0' (3-band detections)
• j_snr>5 OR h_snr>5 OR k_snr>5 (Scan SNR>5 in at least one band)

General Statistics:

Description	Total	Number with USNOA counterpart   (Fraction)
Scan SNR>5 in >1 band	152082	100956   (0.664)
Scan SNR>5 in 3 bands	48526	35377   (0.729)
Scan SNR>6 in >1 band	95893	65256   (0.681)
Scan SNR>6 in 3 bands	5306	4165   (0.785)

Colors

Figure 1 shows the J-H vs. H-K_s color-color diagram for the high latitude low SNR sources. black points represent sources with 5 < Scan SNR < 7 in at least one band, yellow points have 5 < Scan SNR < 7 in 3 bands, and the blue points have 6 < Scan SNR < 7 in 3 bands. The green, red and magenta overlays show the location of dwarf stars, giant stars, and the mean S0 galaxy colors ranging from 0 < z < 1.0. The colors of the high latitude low SNR sources are consistent with those of galaxies with redshifts of a few tenths.

Figure 1

Examine source images on Quicklook Atlas Images:

• Scan SNR>6 in 3 bands - Examined 25 sources (22 w/o optical counterparts)



• 25 real sources - often fuzzy - faint galaxies on DSS

Last Updated: 5 December 2001
R. Cutri - IPAC