J130749.6+292549.2
Link to XCS-DR1 entry
 |  |
| Fig. 1: The SDSS optical image with the XCS X-ray contours overlaid. | Fig. 2: The colour-magnitude diagram used to determine the magnitude gap. Green triangles are spectroscopic cluster members and circles are photometric cluster members. Red triangles are spectroscopic non-members. Only cluster members within ±0.2 mag of the r-i colour of the fossil galaxy (dotted lines) are used to calculate the gap. The two diamonds denote the second and the fourth brightest galaxy. |
Notes
This z=0.2406 system is located at
13:07:49.6 +29:25:49.2. There is the hint of an RS in the CMD, which
the FG lies on, and the magnitude gap is 3.1 based on SDSS photometric
data. There are no other spectroscopic objects in the vicinity of the
FG, however, those objects that have photometric redshifts are at the
same redshift. The X-ray temperature of the system is
TX=3.2 keV and the X-ray emission peak lies ~18.9 kpc
from the FG. The X-ray source is extended with R200=1.04
Mpc or ~25R90. No velocity dispersion could be
measured for this system. This system is also known as ZwCl
1305.4+2941. Gastaldello et al. (2008) find
TX=3.17±0.19 KeV (fully consistent with our
measurement) and LX,500=(1.25±0.16)×
1044 erg s-1.
Fossil System
| XCS ID | Δm14 | R200 | LX | TX | Ltot | ΣL24 |
|---|
| XMMXCS J130749.6+292549.2 | 3.1 | 1.04 | 1.94 | 3.2 | 12.83 | 1.12 |
Fossil Galaxy
| SDSS ID | z | M∗ | Age | Z | log(SSFR) | Lgal |
|---|
| J130749.23+292548.2 | 0.2406 | 1.36 | 10.9 | 0.028 | -12.13 | 6.71 |