J/ApJ/822/78 VLT/MUSE spectroscopic obs. of MACS J1149.5+2223 (Grillo+, 2016)
The story of supernova "Refsdal" told by MUSE.
Grillo C., Karman W., Suyu S.H., Rosati P., Balestra I., Mercurio A.,
Lombardi M., Treu T., Caminha G.B., Halkola A., Rodney S.A., Gavazzi R.,
Caputi K.I.
<Astrophys. J., 822, 78-78 (2016)>
=2016ApJ...822...78G 2016ApJ...822...78G (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Redshifts ; Spectroscopy ; Photometry, HST ;
Gravitational lensing
Keywords: dark matter; galaxies: clusters: general;
galaxies: clusters: individual: MACS J1149.5+2223;
gravitational lensing: strong
Abstract:
We present Multi Unit Spectroscopic Explorer (MUSE) observations in
the core of the Hubble Frontier Fields (HFF) galaxy cluster
MACSJ1149.5+2223, where the first magnified and spatially resolved
multiple images of supernova (SN) "Refsdal" at redshift 1.489 were
detected. Thanks to a Director's Discretionary Time program with the
Very Large Telescope and the extraordinary efficiency of MUSE, we
measure 117 secure redshifts with just 4.8hr of total integration time
on a single 1arcmin2 target pointing. We spectroscopically confirm
68 galaxy cluster members, with redshift values ranging from 0.5272 to
0.5660, and 18 multiple images belonging to seven background, lensed
sources distributed in redshifts between 1.240 and 3.703. Starting
from the combination of our catalog with those obtained from extensive
spectroscopic and photometric campaigns using the Hubble Space
Telescope (HST), we select a sample of 300 (164 spectroscopic and 136
photometric) cluster members, within approximately 500kpc from the
brightest cluster galaxy, and a set of 88 reliable multiple images
associated with 10 different background source galaxies and 18
distinct knots in the spiral galaxy hosting SN "Refsdal". We exploit
this valuable information to build six detailed strong-lensing models,
the best of which reproduces the observed positions of the multiple
images with an rms offset of only 0.26". We use these models to
quantify the statistical and systematic errors on the predicted values
of magnification and time delay of the next emerging image of SN
"Refsdal". We find that its peak luminosity should occur between 2016
March and June and should be approximately 20% fainter than the
dimmest (S4) of the previously detected images but above the detection
limit of the planned HST/WFC3 follow-up. We present our
two-dimensional reconstruction of the cluster mass density
distribution and of the SN "Refsdal" host galaxy surface brightness
distribution. We outline the road map toward even better
strong-lensing models with a synergetic MUSE and HST effort.
Description:
As part of the CLASH sample, MACSJ1149.5+2223 was observed in HST
Cycle 18, between 2010 December and 2011 March, in 15 broadband
filters from 0.2 to 1.7um, to a total depth of 18 orbits, to which
previous archival HST images in the F814W band were added (see
Postman+ 2012, J/ApJS/199/25; Zheng+ 2012Natur.489..406Z 2012Natur.489..406Z; Jouvel+
2014, J/A+A/562/A86).
MACS 1149 was observed with the MUSE instrument on the VLT at the
Paranal Observatory on 2015 February 14 for 1hr, on 2015 March 21 for
4hr, and on 2015 April 12 for 1hr (coverage 4750-9350Å; R∼3000).
Objects:
------------------------------------------------------------------
RA (ICRS) DE Designation(s)
------------------------------------------------------------------
11 49 35.8 +22 23 55 MACS J1149.5+2223 = MCS J1149.5+2223
------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 56 134 MUSE spectroscopic catalog
table2.dat 28 26 Angular positions and spectroscopic redshifts
of the multiple image systems
table3.dat 18 62 Angular positions of the knots of the 'Refsdal'
host (MUSE ID 109, zsp=1.489)
table6.dat 51 300 Catalog of the 300 candidate cluster members
--------------------------------------------------------------------------------
See also:
J/ApJ/817/60 : Multiply imaged supernova Refsdal (Treu+, 2016)
J/ApJ/812/114 : Grism Lens-Amplified Survey from Space (GLASS) I. (Treu+, 2015)
J/MNRAS/444/268 : HST Frontier Fields clusters (Richard+, 2014)
J/ApJS/211/21 : Spectroscopic redshifts of galaxies in MACS (Ebeling+, 2014)
J/A+A/562/A86 : CLASH. Photometric + photo-z catalog (Jouvel+, 2014)
J/A+A/549/A63 : GMASS photometry (Kurk+, 2013)
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- IDsp [1/123] MUSE Spectroscopic Object ID
in MACS J1149.5+2223
5- 5 A1 --- m_IDsp [a-c] Multiply-imaged Object subID (1)
7- 8 I2 h RAh [11] Hour of Right Ascension (J2000)
10- 11 I2 min RAm [49] Minute of Right Ascension (J2000)
13- 18 F6.3 s RAs [33.4/38.2] Second of Right Ascension (J2000)
20- 20 A1 --- DE- [+] Sign of the Declination (J2000)
21- 22 I2 deg DEd [22] Degree of Declination (J2000)
24- 25 I2 arcmin DEm [23/24] Arcminute of Declination (J2000)
27- 31 F5.2 arcsec DEs Arcsecond of Declination (J2000)
33- 40 F8.4 --- z [0/3.71]?=999 Spectroscopic redshift
42- 42 I1 --- QF [0/9]? Quality Flag (2)
44- 50 F7.3 --- zlit [0.5/2.5]? Literature spectroscopic redshift
52- 52 A1 --- r_zlit [ES] Reference for zlit (3)
54- 54 A1 --- EL [NY] Emission Line Flag, Y/N
56- 56 A1 --- f_z [*] Redshift Discrepancy Flag (4)
--------------------------------------------------------------------------------
Note (1): Individual images of multiply-imaged background galaxies.
Note (2): Quality Flags as follows:
4 = extremely secure (dz<0.0004);
3 = very secure (dz<0.001);
2 = secure (dz<0.01);
1 = uncertain;
9 = secure (based on a single emission line);
0 = undetermined.
Note (3): Reference spectroscopic redshifts from:
E = Ebeling et al. 2014, J/ApJS/211/21
(<MACSg JHHMMSS.ss+DDMMSS.s> in Simbad);
S = Smith et al. 2009ApJ...707L.163S 2009ApJ...707L.163S (<[SEL2009] AN.N> in Simbad).
Note (4):
* = Details on the discrepancy between z and z-ref are given in the
article, Section 3.2.4.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- T16 [2/110] Main ID
from Treu+ (2016, J/ApJ/817/60) (G1)
5- 10 F6.2 arcsec offX X offset from BCG Luminosity center (G2)
12- 17 F6.2 arcsec offY Y offset from BCG Luminosity center (G2)
19- 23 F5.3 --- z [1.2/3.71]? Spectroscopic redshift
26- 28 I3 --- IDsp [106/118]? MUSE Spectroscopic Object ID
in MACS J1149.5+2223
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- T16 Main ID from Treu+ (2016, J/ApJ/817/60) (G1)
6- 11 F6.2 arcsec offX X offset from BCG Luminosity center (G2)
13- 18 F6.2 arcsec offY Y offset from BCG Luminosity center (G2)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- IDph [1/300] Photometric Object ID
in MACS J1149.5+2223 (1)
6- 7 I2 h RAh [11] Hour of Right Ascension (J2000)
9- 10 I2 min RAm [49] Minute of Right Ascension (J2000)
12- 17 F6.3 s RAs [29.5/41.4] Second of Right Ascension (J2000)
19 A1 --- DE- [+] Sign of the Declination (J2000)
20- 21 I2 deg DEd [22] Degree of Declination (J2000)
23- 24 I2 arcmin DEm [22/25] Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Arcsecond of Declination (J2000)
32- 36 F5.2 mag F160W [17.9/24.6] HST/WFC3 F160W AB magnitude
38- 41 F4.2 mag e_F160W [0.01/0.08] Uncertainty in F160W
43- 47 A5 --- Obs Observation Code(s) (2)
49- 51 A3 --- Notes Notes (3)
--------------------------------------------------------------------------------
Note (1): At recno #136, second number "126" corrected for "136"
(at RAJ2000=11:49:35.237,DEJ2000=+22:24:38.65) by CDS.
Galaxies are <[GKS2016] cNNN> in Simbad.
Note (2): Observation codes as follows:
- = No spectroscopic data obtained (136 sources);
G = HST/WFC3/Grism spectroscopy (96 sources);
M = VLT/MUSE spectroscopy (20 sources);
M,G = MUSE+Grism spectroscopy (48 sources).
Note (3): Notes as follows:
Ref = Second brightest, "Reference" cluster galaxy;
BCG = Brightest cluster galaxy;
G1 = Spectroscopically confirmed cluster member, G1;
G2 = Spectroscopically confirmed cluster member, G2.
--------------------------------------------------------------------------------
Global notes:
Note (G1): Secondary IDs are not matched because of the possible slight
coordinate offsets.
Note (G2): With respect to the luminosity center of the Brightest Cluster
Galaxy (BCG, RA=11:49:35.699, DE=+22:23:54.71, J2000); Offsets are
positive in the West and North directions.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
01-Sep-2016: Insert into VizieR
25-Jan-2021: Second number "126" corrected for "136" in Table 6.
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Aug-2016