Kinematics and line strength indices in the halos of the Coma brightest cluster galaxies NGC 4874 and NGC 4889

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Volume 519 (September 2010)

A&A, 519 (2010) A95

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Table 1:

Summary of the observing log and instrumental set up.
Parameter	Run 1	Run 2
	13-14 Apr. 2007	8-9 May 2008
Exp. time on galaxy	$16\times 30$ min	$11\times 30$ min
Exp. time on sky	$6\times 30$ min	$4\times 10$ min
Mean Seeing	$\sim$ 2''	$\sim$ 2''
RA slit center	12:59:51	13:00:08
Dec slit center	+27:58:01	+27:58:37
Slit PA	$81^\circ7$	$-8^\circ3$
Slit length	300 arcsec	300 arcsec
Slit width	0.8 arcsec	1.0 arcsec
CCDs	MIT 2.2 K $\times$ 4 K	MIT 2.2 K $\times$ 4 K
Gain	2.1 e^-/ADU	2.1 e^-/ADU
R.O.N.	4 e^- rms	4 e^- rms
Pixel size	15 $\mu$ m	15 $\mu$ m
Pixel binning	$3\times1$	$3\times1$
Pixel scale	0 $.\!\!^{\prime\prime}$ 104 pixel^-1 ( $\times 3$ )	0 $.\!\!^{\prime\prime}$ 104 pixel^-1 ( $\times 3$ )
Grism	VPH 450	VPH 520
Filter	L600	L600
Dispersion	0.394 Å pixel^-1 ( $\times 1$ )	0.400 Å pixel^-1 ( $\times 1$ )
Observed range	4200-5700 Å	4450-6050 Å
Calibrated range	4545-5665 Å	4700-5900 Å
Calibration lamp	Th + Ar	Th + Ar
Instrumental $\sigma^{(*)}$	76 $\rm km\;s^{-1}$	96 $\rm km\;s^{-1}$

Notes. ^(*) Computed at 5100 Å.

Source LaTeX | All tables | In the text

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