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0
Assigned ID: 1133
----- Attempting Submission 1 (Wed Aug 19 13:47:45 GMT 2020) -----
Joint Chandra/HST
0
----- Attempting Submission 1 (Wed Sep 16 13:06:22 GMT 2020) -----
A candidate bullet in the Planck SZ Catalogue
We propose joint Chandra (146 ks) and HST (5 orbits) observations of PSZ2 G282.28+49.94, a candidate ``bullet-like" cluster. It features a cometary shape and a very large offset (350 kpc) between the X-ray peak and a galaxy clump, suggesting that it is undergoing a major merger shortly after core passage. In this phase, the collisionless components of the cluster are maximally separated from the collisional ICM, as in the Bullet Cluster, and their separation can provide constraints to the DM cross section. The large separation makes PSZ2 G282.28+49.94 a very promising target for these studies. The requested observations will allow us to map both the ICM and the DM distribution, to infer the dynamical history of this extreme object and to measure the offset between DM, gas and galaxies.
We're doing a 2x2 mosaic with ACS F814W (for weak lensing) + a central pointing of F435W.
Each ACS pointing will be 1 orbit with 4 dithers stepping across the chip gap.
These will complement the archival half-orbit snapshot in WFC3/IR F110W and F140W (706 s each; PI Ebeling; GO 15132).
n/a
Galaxies
6
false
false
false
false
false
false
false
SUPPORTED
CLUSTER OF GALAXIES
GRAVITATIONAL LENS
RICH CLUSTER
This object was generated by the targetselector and retrieved from the SIMBAD database.
J2000
J2000
ACS/WFC
Imaging
No
No
F435W
ACS/WFC
Imaging
No
No
F814W
POS-TARG
DITHER
3.034
LINE
false
false
4
85.29
ACS-WFC-DITHER-LINE
1
false
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