J/A+A/689/A42 MACS J1149.5+2223 redshifts (Schuldt+, 2024)
Improved model of the Supernova Refsdal cluster MACS J1149.5+2223 thanks
to VLT/MUSE.
Schuldt S., Grillo C., Caminha G.B., Mercurio A., Rosati P., Morishita T.,
Stiavelli M., Suyu S.H., Bergamini P., Brescia M., Calura F., Meneghetti M.
<Astron. Astrophys. 689, A42 (2024)>
=2024A&A...689A..42S 2024A&A...689A..42S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Gravitational lensing ; Redshifts ;
Photometry, HST ; Optical
Keywords: gravitational lensing: strong - methods: data analysis - catalogs -
galaxies: clusters: general - galaxies: distances and redshifts
galaxies: clusters: individual: MACS J1149.5+2223
Abstract:
We present new VLT/MUSE observations of the Hubble Frontier Field
(HFF) galaxy cluster MACS J1149.5+2223, lensing the well-known
supernova "Refsdal" into multiple images, which has enabled the
first cosmological applications with a strongly lensed supernova.
Thanks to these data, targeting a northern region of the cluster and
thus complementing our previous MUSE program on the cluster core, we
have released a new catalog containing 162 secure spectroscopic
redshifts. We confirmed 22 cluster members, which had previously been
only photometrically selected, and detected ten additional ones,
resulting in a total of 308 secure members, of which 63% are
spectroscopically confirmed. We further identified 17 new
spectroscopic multiple images belonging to six different background
sources. By exploiting these new and our previously published MUSE
data, in combination with the deep HFF images, we developed an
improved total mass model of MACS J1149.5+2223. This model includes
308 total mass components for the member galaxies and requires four
additional mass profiles, one of which is associated with a cluster
galaxy overdensity identified in the north, representing the dark
matter mass distribution on larger scales. The values of the resulting
34 free parameters are optimized based on the observed positions of
106 multiple images from 34 different families, that cover an extended
redshift range between 1.240 and 5.983. Our final model has a multiple
image position root mean square value of 0.39", which is in good
agreement with other cluster lens models based on a similar number of
multiple images. With this refined mass model, we have paved the way
toward an improved strong-lensing analyses that will exploit the deep
and high resolution observations with HST and JWST on a pixel level in
the region of the supernova Refsdal host. This will increase the
number of observables by around two orders of magnitude, thus offering
the opportunity to carry out more precise and accurate cosmographic
measurements in the future.
Description:
Redshift catalog combining MUSE observations (Grillo et al.,
2016ApJ...822...78G 2016ApJ...822...78G, Cat. J/ApJ/822/78) and the GLASS survey (Treu et
al., 2015ApJ...812..114T 2015ApJ...812..114T, Cat. J/ApJ/812/114), which was constructed
for the analysis of the SN Refsdal
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 98 432 MUSE catalog from new pointing
--------------------------------------------------------------------------------
See also:
J/ApJ/812/114 : Grism Lens-Amplified Survey from Space (GLASS) I. (Treu+, 2015)
J/ApJ/822/78 : MACS J1149.5+2223 VLT/MUSE spectroscopic obs. (Grillo+, 2016)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 27 A27 --- CLASHVLT CLASHVLTR identifier
(CLASHVLTJHHMMSS.ss+DDMMSS.s)
29- 33 I5 --- HST HST catalog ID (1)
35- 44 F10.6 deg RAdeg Rigth ascension (J2000) (WCS)
46- 54 F9.6 deg DEdeg Declination (J2000) (WCS)
56- 62 F7.5 --- z Redshift (2)
64 I1 --- q_z [2/9] Redshift reference quality flag (3)
66 I1 --- Mult Number of spectra per target
68- 74 F7.5 --- s_z ?=0 Standard deviation of redshift
measurements when multiplicity Mult>0,
0.00000 otherwise)
76- 80 F5.2 mag F814W ?=99 HST F814W band Kron magnitude (AB)
82- 96 A15 --- FileName Root name of 1D spectrum file
98 I1 --- r_z [1/2] Reference for redshift (4)
--------------------------------------------------------------------------------
Note (1): IDs are negative (-1, -2, -3) when no match with HST catalog is found.
In such a case RA&DEC are reconstructed MUSE coordinates.
Note (2): MUSE redshifts have errors of 15km/s,
GLASS redshifts have errors of 200km/s.
Note (3): Quality flag as follows:
2 = LIKELY [304]
3 = SECURE [109]
9 = SINGLE-LINE [ 19]
Note (4): Reference for redshift as follows:
1 = MUSE [114]
2 = GLASS [318]
--------------------------------------------------------------------------------
History:
From https://sites.google.com/site/vltclashpublic/data-release#macs1149
(End) Patricia Vannier [CDS] 20-Feb-2025