INR --- | --- SIRTF@IPAC

Modelling deep imaging surveys

SIRTF probable detection rates simulated using Monte Carlo techniques. Following postscript file summarises the technique and the available calibration data, and gives progress report as of July 12, 2000.

Progress report 1

Following plots give predicted colour distributions for 0.5 mag intervals in M, 14.5 < M < 17.5. (M zeropoint is F=154 Jy.). Solid histogram gives predictions for a power-law mass function with alpha = 2 (near Salpeter) 0.1 > M/M(sun) > 0.01; dotted line is for alpha = 1.5; dashed line for alpha = 1 (most likely value). Surface densities are in units of N / 0.5 mag (M) / 10 sq. deg.

Predicted (J-M) colour distributions

Predicted number-magnitude relation for alpha = 1, 1.5, 2 (same identification as in previous figure); surface densities scaled to 10 square degrees.

M-band number counts

Second draft of section for LEGACY proposal 21/12/00

2nd draft - latex

Figure

Data files for the above plot. Note that all of the files are calculated for a solid angle of 10 sq. deg.; the figure legend is scaled to give the equivalent numbers for 75 sq. deg.; the number counts are for Johnson M (zeropoint = 154 Janskys) - convert to F(4.5)_AB by adding 3.84 magnitudes.

• supermongo macro
• Numbercounts, alpha=1; col 1 = M; col 2 = N/10 sq.deg./0.5 mag.
• number counts, alpha=1.5;
• number counts, alpha=2;
• temperature distribution, alpha=1 col 1 = T; col 2 = N/100K (all masses; M < 17.5); col 3 = N/100K (J < 16); col 4 = N/100K (M < 0.03 M(sun), M < 17.5); col 5 = N/100K (0.03 < M < 0.055 M(sun), M < 17.5);col 6 = N/100K (0.055 < M < 0.07 M(sun), M < 17.5).
• temperature distribution, alpha=2 Format as above. Last line gives the totals (ignore the fact that the number in column 1 is 50).

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