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Table 2

Observational details.

NGC 1052

Satellite Obs ID Date Radius Exptime Net Exptime Counts HR OM
(″) (ks) (ks) (0.5–10 keV)
(1) (2) (3) (4) (5) (6) (7) (8) (9)

XMM-Newton c 093630101 2001-08-15 25 16.3 11.2 5818 0.06 No
XMM-Newton 306230101 2006-01-12 25 54.9 44.8 25 565 0.03 Yes
XMM-Newton 553300301 2009-01-14 25 52.3 42.4 27 367 0.02 Yes
XMM-Newton * 553300501 2009-01-14 25 8.0 5.4 320 No
XMM-Newton 553300401 2009-08-12 25 59.0 46.8 30 643 0.02 Yes
Chandra (ACIS-S) * 385 2005-09-18 3 2.4 2.3 270 0.24
Chandra (ACIS-S) * c 5910 2000-08-29 3 60.0 59.2 6549 0.04
NGC 3226

XMM-Newton c 0101040301 2000-11-28 15 40.1 30.2 6514 0.04 Yes
XMM-Newton 0400270101 2006-12-03 15 107.9 93.1 28 199 0.01 Yes
Chandra (ACIS-S) * c 860 1999-12-30 3 47.0 46.6 476 0.12
Chandra (ACIS-S)* 1616 2001-03-23 3 2.5 2.2 193 0.31
NGC 3627

XMM-Newton c 0093641101 2001-05-26 25 11.2 5.1 1181 0.02 Yes
Chandra (ACIS-S) * 394 1999-11-03 8 1.8 1.8 7
Chandra (ACIS-S) c 9548 2008-03-31 8 50.2 49.5 964 0.05
NGC 4261

Chandra (ACIS-S) 834 2000-05-06 3 35.2 34.4 3465 0.01
Chandra (ACIS-S) c 9569 2008-02-12 3 102.2 100.9 7757 0.01
XMM-Newton 0056340101 2001-12-16 25 33.2 21.3 10 730 0.01 Yes
XMM-Newton c 0502120101 2007-12-16 25 127.0 63.0 32 156 0.01 Yes
NGC 4278

Chandra (ACIS-S) * 398 2000-04-20 3 1.4 1.4 303 0.05
Chandra (ACIS-S) * 4741 2005-02-03 3 37.9 37.5 20% pileup
Chandra (ACIS-S) c 7077 2006-03-16 3 111.7 110.3 9182 0.01
Chandra (ACIS-S) * 7078 2006-07-25 3 52.1 51.4 18% pileup
Chandra (ACIS-S) * 7079 2006-10-24 3 106.4 105.1 16% pileup
Chandra (ACIS-S) 7081 2007-02-20 3 112.1 110.7 7591 0.01
Chandra (ACIS-S) 7080 2007-04-20 3 56.5 55.8 3379 0.01
Chandra (ACIS-S) * 11269 2010-03-15 3 83.0 81.9 2091 0.01
Chandra (ACIS-S) * 12124 2010-03-20 3 26.2 25.8 576 0.01
XMM-Newton * c 0205010101 2004-05-23 25 35.9 20.8 34 516 0.01 Yes
NGC 4552

Chandra (ACIS-S) c 2072 2001-04-22 3 55.1 54.4 2288 0.01
XMM-Newton c 0141570101 2003-07-10 25 44.8 17.3 12180 0.01 Yes
NGC 5846

XMM-Newton c 0021540101 2001-01-25 25 30.0 25.6 25 905 0.01 Yes
XMM-Newton d 0021540501 2001-08-26 25 19.7 10.0 10 027 0.01 Yes
Chandra (ACIS-S) c 788 2000-05-24 7 30.3 29.9 1839 0.01
Chandra (ACIS-I) 7923 2007-06-12 7 91.2 90.0 2307 0.01

Notes.Instrument (Col. 1), obs ID (Col. 2), date (Col. 3), aperture radius for the nuclear extraction (Col. 4), total exposure time (Col. 5), net exposure time (Col. 6), number of counts in the 0.5–10 keV band (Col. 7), hardness ratio (Col. 8), data from the optical monitor available (Col. 9).

(*)

Observations were not used for the simultaneous fittings.

(c)

Observations used to compare XMM-Newton and Chandra data.

(d)

Observation with only optical OM data (UV not available).

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