Parabolic Dish

Summary of the available instrumentation


Here follow the summary tables listing the available instrumentation at the three telescopes. For each telescope, the first table provides constantly-updated information on the temporary unavailability of instruments and devices.
For further technical detail, please visit the specific sections linked here.


Italian VLBI


Notice: extra-EVN interferometry projects can involve any of the Italian antennas, as well as international facilities
(PIs are requested to arrange such collaborations prior to the submission of a proposal). Here only the main characteristics of the italian sub-network are provided.

MAXIMUM ANGULAR RESOLUTION
Band(a)
Theta Mc-Nt
(mas)
lambda
(cm)
L
41.5
18
C-low 13.8
6
C-high
11.5
5
X
8.3
3.6
K
3.0
1.3


SENSITIVITY
Band(a)
Baseline
sensitivity
Mc-Nt

(5', mJy)
Baseline
sensitivity
Mc-Sr

(5', mJy)
Baseline
sensitivity
Nt-Sr

(5', mJy)
Image
sensitivity
Mc-Nt

(6h, mJy)
Image
sensitivity
Mc-Sr

(6h, mJy)
Image
sensitivity
Nt-Sr

(6h, mJy)
Image
sensitivity
McNtSr

(6h, mJy)
L
1.86
0.56
0.57
0.22
0.07
0.07
0.05
S
1.12
-
-
0.13
-
-
-
C-low
0.54
-
-
0.06
-
-
-
C-high
2.48
0.53
0.61
0.29
0.06
0.07
0.05
X
1.34
-
-
0.16
-
-
-
K
1.93
0.80
0.86
0.23
0.09
0.10
0.07
(a) Details on the RF frequency ranges are listed in the sections devoted to the single telescopes
All estimates assuming 2048 Mbps data rates. Computations: EVN sensitivity calculator, http://old.evlbi.org/cgi-bin/EVNcalc 


CONTINUOUS CALIBRATION AVAILABILITY(b)
Telescope
L band S band C-low band
C-high band
X band
K band
Mc
v
x
v
v
v
v

Nt
x
x
v
v
x
v

Sr
x
x
x
v x v

(b) The DBBC allows to detect synchronously an 80 Hz signal integrating the power from the cal off and cal on phases.                   


UV COVERAGE
Plots of the UV coverage for DEC-10, DEC+30 and DEC+70 are shown in this PDF file.


 

Sardinia Radio Telescope


INFO on CURRENTLY UNAVAILABLE DEVICES
(scroll table; contact us for additional details)


RECEIVERS
 RF band
 (GHz)
Type
Offered for
Tsys @90°EL
(K)
Beamsize
(arcmin)
Max gain
(K/Jy)
Connected back-ends
 P  0.30-0.36(c)
 L  1.3-1.8
Dual frequency
coaxial feed,
cryo-cooled
VLBI,
single-dish
50-80
25-35
48
12.6
0.52
0.55
DBBC,
DFB3 (L band only),
SARDARA (L band only), ROACH-1
 C-high 5.7-7.7
Single-feed,
cryo-cooled
VLBI, single-dish
32-37
2.7
0.60
TP, DBBC, DFB3,
XARCOS, SARDARA, ROACH-1
 K  18-26.5
7-feed,
cryo-cooled
VLBI, single-dish
90(d)
0.8
0.66
TP, DBBC (single-feed),
DFB3 (single-feed),
XARCOS, SARDARA,
ROACH-1 (single-feed)
(c) Full band (300-410 MHz) is not available due to RFI. This band is available for pulsar observations only
(d) @22.3 GHz, with tau0=0.1 and ground-level atmospheric temperature Tg=293 K

 

BACK-ENDS

Name
available bandwidths (MHz)

Type

Integr. time

Max frequency bins

TP
250, 680, 1200 (C and K bands only),
2000 (C and K bands only)

Analog
total power

1-1000 ms

1

XARCOS
Narrow band spectrometer; up to four (for single-feeds) simultaneous bandwidths: 0.5, 2.0, 7.8, 62.5

Spectro-polarimeter

10 s

2048

SARDARA(e)
420, 1000 (L-band only, no f-track), 1500

Spectro-polarimeter

Down to
5 ms

1024 or 16384

DFB3
1024

Correlator for pulsars

Typical:
100 μμs

2048

ROACH1(f)
128 (8 x 16 MHz)

Baseband recorder

---

(varies with offline processing)

DBBC
512

VLBI

---

---

(e) IF band can be narrower than back-end filters, see technical information for details
(f) ROACH1 is still experimental; it is offered in shared-risk mode




Medicina


INFO on CURRENTLY UNAVAILABLE DEVICES (scroll table; contact us for additional details)

RECEIVERS

 RF band
 (GHz)
Type
Offered for
Tsys @90°EL
(K)
Beamsize
(arcmin)
Max gain
(K/Jy)
Connected back-ends
 L  1.35-1.45
     1.595-1.715
Dual-channel,
mono-feed
VLBI
55
65
27.5
31.2
0.12
0.11
 DBBC
 S  2.2-2.36
 X  8.18-8.98
Dual-frequency,
coaxial feed,
cryo-cooled
VLBI,
single dish (X only)
55
38
18
4.9
0.12
0.14
TP, DBBC, XARCOS
 C-low  4.3-5.8
Single-feed,
cryo-cooled
VLBI, single-dish 28
7.4
0.16
TP, DBBC, XARCOS
 C-high  5.6-7.3
Single-feed
VLBI, single-dish(g)
60-90
5.4
0.15
TP, DBBC, XARCOS
 K  18-26.5
Dual-feed,
cryo-cooled
VLBI, single-dish 50-80
1.7
0.11
TP, DBBC (single-feed),
XARCOS (single-feed)

(g) This receiver is offered in shared-risk mode for single-dish observations. Due to RFI, only a limited bandwidth can be exploited

BACK-ENDS

Name
available bandwidths (MHz)

Type

Integr. time

Max frequency bins

TP
250, 680, 1200 (C and K bands only), 2000 (K band only)

Analog
total power

1-1000 ms

1

XARCOS
Narrow band spectrometer; up to four simultaneous bandwidths: 0.5, 2.0, 7.8, 62.5

Spectro-polarimeter

10 s

2048

DBBC
400

VLBI

0.1-1 s

4096

 




Noto


INFO on CURRENTLY UNAVAILABLE DEVICES (scroll table; contact us for additional details)

RECEIVERS

 RF band
 (GHz)
Type
Offered for
Tsys @90°EL
(K)
Beamsize
(arcmin)
Max gain
(K/Jy)
Connected back-ends
 L  1.32-1.72
Single-feed VLBI 70(h)
30
0.10(h) DBBC
 S  2.21-2.39
 X  8.21-8.93
Dual-frequency,
coaxial feed
VLBI,
single dish (X only)
50(h)
90(h)
18
4.9
0.11(h)
0.108(h)
TP, DBBC
 C-low  4.62-5.02
Single-feed,
cryo-cooled
VLBI, single-dish 30
8
0.14
TP, DBBC
 C-high  5.1-7.25
Single-feed
VLBI 120
7.8
0.15(i)
DBBC
 K  21.5-23.0
Single-feed,
cryo-cooled
VLBI, single-dish
110
1.7
0.08
TP, DBBC
(h) These receivers have been recently installed and are offered in shared-risk. The given values are preliminary estimates.
(i) This value refers to LCP only. RCP has a maximum gain of 0.06 K/Jy


BACK-ENDS

Name
available bandwidths (MHz)

Type

Integr. time

Max frequency bins

TP
250, 680

Analog
total power

1-1000 ms

1

DBBC
400

VLBI

0.1-1 s

4096




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