Age and metallicity gradients in fossil ellipticals

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Table 1

Fossil ellipticals observed with ISIS.

Galaxy	α₂₀₀₀	δ₂₀₀₀	z	r′	Exposure	PA	Spectral range		FWHM
Galaxy	α₂₀₀₀	δ₂₀₀₀	z	[mag]	[seconds]	[°]	blue arm	red arm	[arcsec]

NGC 1132	02 52 51.8	−01 16 28.8	0.023	12.19	4 × 2700	140	3800−6250 Å	6600−7200 Å	1.3
RX J0752.7+4557^a	07 52 44.2	+45 56 57.4	0.052	14.43	3 × 3000	76	3800−6250 Å	6600−7200 Å	1.3
RX J0844.9+4258^a	08 44 56.6	+42 58 35.7	0.054	13.93	3 × 3000	36	3800−6250 Å	6600−7200 Å	1.3
RX J1152.6+0328^b	11 52 37.6	+03 28 21.8	0.081	14.37	3 × 2700	23	3800−6250 Å	6300−8500 Å	0.7
RX J1520.9+4840^b	15 20 52.3	+48 39 38.6	0.074	13.68	3 × 2600	94	3800−6250 Å	6300−8500 Å	0.7
RX J1548.9+0851^a	15 48 55.9	+08 50 44.4	0.072	13.20	3 × 2600	33	3800−6250 Å	6300−8500 Å	0.7

Notes.

^(a)

From Santos et al. (2007).

^(b)

From Eigenthaler & Zeilinger (2009).

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