Open Access
Table 1
Average standard deviation of the X-ray filtered map 
(in Δ T∕T units) for different values of mean Poisson noise λ (in counts/pixel) and several filter sizes (in arcmin), corresponding to a map with exposure time of 400 s and NH = 2 × 1020 cm−2.
| λ = 0.03 | λ = 0.06 | λ = 0.09 | λ = 0.15 | λ = 0.25 | λ = 0.40 | λ = 0.70 | λ = 2.00 | λ = 7.50 | |
|---|---|---|---|---|---|---|---|---|---|
| θs = 0.80 | 5.00e−5 | 7.08e−5 | 8.68e−5 | 1.12e−4 | 1.45e−4 | 1.84e−4 | 2.43e−4 | 4.10e−4 | 7.93e−4 |
| θs = 1.28 | 3.07e−5 | 4.34e−5 | 5.33e−5 | 6.90e−5 | 8.93e−5 | 1.13e−4 | 1.49e−4 | 2.52e−4 | 4.87e−4 |
| θs = 2.04 | 1.76e−5 | 2.49e−5 | 3.06e−5 | 3.96e−5 | 5.12e−5 | 6.49e−5 | 8.56e−5 | 1.44e−4 | 2.79e−4 |
| θs = 3.25 | 9.40e−6 | 1.33e−5 | 1.64e−5 | 2.12e−5 | 2.75e−5 | 3.48e−5 | 4.59e−5 | 7.73e−5 | 1.49e−4 |
| θs = 5.19 | 4.96e−6 | 7.03e−6 | 8.64e−6 | 1.12e−5 | 1.45e−5 | 1.84e−5 | 2.42e−5 | 4.08e−5 | 7.88e−5 |
| θs = 8.29 | 2.71e−6 | 3.86e−6 | 4.75e−6 | 6.17e−6 | 8.01e−6 | 1.01e−5 | 1.33e−5 | 2.24e−5 | 4.32e−5 |
| θs = 13.23 | 1.50e−6 | 2.14e−6 | 2.64e−6 | 3.44e−6 | 4.47e−6 | 5.67e−6 | 7.41e−6 | 1.24e−5 | 2.39e−5 |
| θs = 21.12 | 8.81e−7 | 1.26e−6 | 1.56e−6 | 2.04e−6 | 2.67e−6 | 3.38e−6 | 4.38e−6 | 7.29e−6 | 1.41e−5 |
| θs = 30.00 | 5.91e−7 | 8.51e−7 | 1.06e−6 | 1.39e−6 | 1.82e−6 | 2.30e−6 | 2.96e−6 | 4.90e−6 | 9.43e−6 |
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