EVN STATUS TABLES - Last update: 13 May 2008 ================= Please communicate any comments to Antonis Polatidis (polatidis@jive.nl) TABLE I OBSERVATORIES, TELESCOPES AND AVAILABILITY ---------------------------------------------------------------------- | EVN OBSERVATORIES | TELESCOPE | AVAILABILITY | | |Code Diameter(m)| (see also TABLE II ) | |--------------------|-----------------|-----------------------------| |Jodrell Bank (UK) |Jb-1 Lovell 76 | Wavelengths >=6cm (5cm 2004)| | |Jb-2 Mk2 25 | Wavelengths < 18 cm | |Cambridge (UK) |Cm 32 | For EVN+MERLIN only - see(a)| |Westerbork (NL) |Wb Array Nx25 | See note (b) | |Effelsberg (D) |Eb/Ef 100 | | |Medicina (I) |Mc 32 | | |--------------------|-----------------|-----------------------------| |Noto (I) |Nt 32 | | |Onsala (S) |On-85 25 | Wavelengths >= 5 cm | | |On-60 20 | Wavelengths < 5 cm, + 13 cm | |Sheshan(Shanghai,CH)|Sh 25 | | |Nanshan(Urumqi,CH) |Ur 25 | | |Torun (PL) |Tr 32 | | |--------------------|-----------------|-----------------------------| |Metsaehovi (FI) |Mh 14 | Wav. 1.3, 0.7 cm. 13,3.6 | |Yebes (E) |Yb 14 | Wavel. 13,3.6, 0.7cm see (e)| | |Yb-40 40 | Wavel. 1.3cm (2008) | |Arecibo (USA) |Ar 305 | see note (c) | |Hartebeesthoek (SA) |Hh 26 | | |Wettzell (D) |Wz 20 | Limited; 13, 3.6 cm only | ---------------------------------------------------------------------- OTHER OBSERVATORIES ---------------------------------------------------------------------- |Robledo (Madrid, E) |Rob70 DSS-63 70 | Limited; | | |Rob34 DSS-65 34 | Limited; 13, 3.6 cm only | |Simeiz (Ukraine) |Sm 22 | | |Kashima (JP) |Ka 34 | see note (d) | |Matera (I) |Mr 20 | see note (d) | |Ny-Alesund (NO) |Ny 20 | see note (d) | ---------------------------------------------------------------------- (a) Cm occasionally available without MERLIN, but only with exceptional justification to the EVN Program Committee, and at the discretion of the Director, MERLIN/VLBI National Facilty (UK) (b) Default mode of operation for Westerbork uses the full tied array of 14 telescopes, although from time to time one or more may be out of operation. The tied array uses the current 8x16 MHz IF system. It is also possible to use only a single dish, to avoid problems with bandwidth and the narrow fan beam of the tied array. At 5cm only a single 14m telescope is used. Note: Hour-angle restriction is +- 6 h (c) Arecibo may be available for a small amount of time during EVN sessions for proposals which justify a need for its exceptionally high sensitivity. Proposals need only be submitted to the EVN. Note hour-angle limits: Max +- 1h20m (Dec 20) decreasing to +- 30m (Dec 0 and ~36) (d) These non-EVN telescopes may be requested for VLBI observations together with the EVN, but their use must be arranged by the Proposers themselves by application to the relevant observatory See also http://www.mpifr-bonn.mpg.de/EVN/EVNaffiliatecode.txt (e) The Yebes 14 meter telescope is out of service due to failure of its control computer. The new Yebes 40m telescope is expected to start observations at 1.3cm in the middle of 2008. Other receivers (s/X, 5-6 GHz) will follow. TABLE II ANTENNA+RECEIVER PERFORMANCE (SEFD = system noise in Jy) ------------------------------------------------------------------------------ |Wavel'th| 92 | 49 | 30 %| 21 #| 18 | 13*| 6 |5 (g)| 3.6*| 1.3 |0.7 cm| |--------|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-------| |Jb-1 (e)| 132 | 83 | | 36=| 44=| | 35 | | | | | |Jb-2 (d)| | | | 350=| 320=| | 320 | 910 | | 910 | | |Cm (a)| | | | 220=| 212=| | 136 | 900?| | 720 | | |Wb (b)| 150 | 90 | 120 | 30=| 30=| 60y| 60 |1600 | 120 | | | |Eb/Ef | | | 65 | 20=| 19=| 300r| 20 | 25 | 20 | 90 | 500 | |Mc | | | | 490=| 600=| 400 | 170 | 840 | 320 |1200+| | |--------|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-------| |Nt | 980s| yes |1025 | 820=| 784=| 770r| 260 |1100 | 770r| 800 | 900 | |On-85 | | | 900 | 320=| 320=| | 600 |1500 | | | | |On-60 | | | | | |1110r| |(09)?|1630r|1380 | 1310 | |Sh | | | | | 540 |1792r| 664 | | 708r|2185 | | |Ur |3020s|(f) |2400L| 240=| 240=| 880r| 200 | | 450r|2950L| | |Tr | | |2000 | 250=| 230=| | 220 | 400 | |(07) | | |--------|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-------| |Mh !| | | | | |4500r| | |3200r|2608 | 4500 | |Yb (h)| | | | | |3800r| | |3300r| | 4160L | |Yb-40 | | | | | | | | | |(08) | | |Ar | 12 | 12 | 3 | 3.5 | 3 | 3 | 5 | 5 | 6 | | | |Wz | | | | | |1250r| | | 750r| | | |Hh | | | | | 450 | 380 | 795 | 680 | 940 |3000 | | ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ |Rob70 | | | | | 35L| 20- |(06)?| | 18 | 83 | | |Rob34 | | | | | | 150 | | | 106-| |(06)? | |Sm |2000s|1600s| | | 900s| 800s| 400s| |1200s|3000s| | |Ka | | | | | ? | 240 | | | 300 | | | |Ny | | | | | | 850r| | |1255r| | | ------------------------------------------------------------------------------ All receivers (rx's) are dual circular polarisation unless otherwise indicated: L = LHC polarisation only r = RHC polarisation only s = only single (circular) polarisation; can be selected by investigator y = single linear polarisation (*) All observatories with 13 and 3.6 cm can observe both simultaneously and ONLY in RCP In Wb single linear polarization ONLY when observing simultaneously 3.6/13cm (=) Same receiver box for 21/18 cm. Manual changes: Nt (1h) (a) Cambridge normally available only during joint EVN/MERLIN sessions (d) Jb-2 normally used at 18 and 21 cm only when Jb-1 not available (but may replace Jb-1 in EVN-MERLIN sessions with prior justification) (b) Tsys values at Westerbork assume 14 telescopes of the tied array (e) Using the Lovell antenna the duration of any two adjacent scans must add up to at least 10min. (Contact A. Gunn for more details) (yy) planned for year 20yy (+) Two 1.3 cm receivers at Medicina (same Tsys) - dual channel at prime focus and single channel (LCP) at secondary focus mounting. (&) There in no 7mm RX in Medicina. The 7mm Noto RX has SEFD(LCP)=900 and SEFD(RCP)=1100 Jy (!) The Dual polarization RX at 43GHz in Metsahovi is currently out of service (Jun 2005) but can become available if there is proposal demand. The SEFD reported is from the old receiver. On the S/X receiver RCP only is installed. SEDF from the Geodesy SKED programme. The S/X receiver belongs to the Finnish Geodetic Institute and is thus not generally available for EVN observations by default. PIs wishing to use the receiver need to contact Metsahovi to initiate arrangements with FGI to get the permission to use the receiver. (-) Rob34 (DSS-65) At 13cm a HEMT rx (new 2005/2006). At 3.6cm a MASER rx (SEFD specified in the table) and a HEMT rx (SEFD 156Jy). For Rob70: At 13cm a maser RX (SEFD in the table) and a HEMT RX, SEFD=24, all other receivers are HEMTs. Plans for Dual Pol 18cm and 6cm at Rob70, and 7mm RX (2008) in one of the 34m telescopes (DSS-54) (%) 30cm Frequency range: See Table IIIC (#) See Table IIIA (f) New 49cm receiver in Urumqi. Freq 610-630 MHz SEFD not measured yet. (g) See Table IIIb (h) The new Yebes 40m telescope will participate in VLBI observations at 1.3cm from mid-2008. Other receivers (13/3.6, 6-5 cm) will become available in due cource. The Yebes 14m telescope can not participate in VLBI observations anymore due to failure of its control computer. (j) New Dual Polarisation 1.3cm and 0.7cm RX for OSO20m. SEFDs in the table are for the old receivers. TABLE III FREQUENCY (RECEIVER) AGILITY ------------------------------------------------------------------------------ |SITE|SWITCH|SCHED| WAVELENGTHS | COMMENTS | | | TIME |CONTR| | | |----|------|-----|-------------------------|--------------------------------| |Eb | 40s | yes |13, 6, 3.6, 2, 1.3, 0.7 |sec. focus / high IF / VLBA-rec | |Ef | 40s | yes | 2, 1.3, 0.7 |single-box rx / low IF / MK4-rec| |Eb | 40s | yes |18,21 |single rx; I.F. level changes !!| |Ef | 40s | yes |18,21 |single rx; I.F. level changes !!| |Wb | 300s | no |92,49,30,21,18,13,6,3.6 |prime focus | |Mc | 70s | yes |18/21, 13, 3.6, 1.3 |prime focus | |Mc | 240s | yes |18/21, 13, 3.6, 1.3<=> 6 |prime <=> secondary focus | |Nt | 70s | no |18, 13, 3.6, 1.3 | | |On85| 0s | yes |18, 21 |Changes in PRC file | |On85| 0s | yes | 6,5 |Changes in PRC file | |On60| 600s | no |1.3, 0.7, 0.3 | | |On60|60min | no |3.6/13 to <1.3 | | |Tr | 30s | yes |18, 6, 5 |SCHED switch between 18/21, 5/6 | |Cm | 180s | yes |18/21, 6, 1.3 |Changes in PRC file | |Hh | 30s | yes |13, 6, 5, 3.6 |Manual IF-VC cabling | |Sh | 5min| no |13/3.6, 6, 1.3 | | |Ur | 50min| no |1.3,3.6/13,6,18/21,30,49,92 no automatic changes | |Ro70| 300s | yes |Any band to 18 |ifadjust | |Ro70| 300s | yes |Any band to 1.3 |ifadjust | |Yb | 60min| no |13/3.6 , 0.7 | | ------------------------------------------------------------------------------ SCHED CONTR = Automatic change from VLBI schedule, no operator intervention ===> All other rx changes on the EVN take timescales >= 30 mins (#) TABLE IIIA 21/18cm FREQUENCY RANGE + AGILITY ------------------------------------------------------------------------ |SITE |SCHED|LOCAL| Frequency range | COMMENTS | | |CONTR|CMDS | | | |-----|-----|-----|----------------------|-----------------------------| |Eb/Ef| yes | no*| 1275-1480, 1590-1725 |New system in planning | |Jb1/2| yes | yes*| 1370-1430, 1550-1730 |30s switch time | |Cm | yes | yes | 1370-1430, 1550-1730 |30s switch time | |Wb | no | yes | 1150 - 1800 |rephase after agility(5Min) | |Mc | yes | yes | 1350-1450, 1595-1715 |21 and 18:different ptg model| |Nt | yes | no | 1400 - 1705 |Continuous band (no delay) | |On85 | yes | yes*| 1200-1450, 1594-1720 |Changes in PRC file | |Tr | yes | no | 1350 - 1750 | | |Ur | yes | no*| 1400 - 1735 | mixed patch:VC1-4low,5-8hi | |Ar | ? | ? | 1150 - 1730 | | |Hh | - | | 1580-1750 | | |Sh | - | | 1600-1740 | | ------------------------------------------------------------------------ (*) Mk4 systems:use ifadjust after switch 21/18cm to get levels OK. SCHED CONTR=switch 21/18 automatically from schedule. LOCAL CMDS=extra local commands must be inserted in schedule. (g) TABLE IIIB 5cm: 6.0/6.7 GHz AGILITY ------------------------------------------------------------------------ |SITE |SCHED|LOCAL| Frequency range | COMMENTS | | |CONTR|CMDS | | | |-----|-----|-----|----------------------|-----------------------------| |Eb/Ef| yes | no | 5750-6750 | | |Jb1/2| | ? | 6000-7000 | Changes in PRC file | |Cm | yes | yes | 6000-7000 | Changes in PRC file | |Wb | yes | no | 6100-6700 | | |Mc | yes | yes | 5900-7000 | | |Nt | - | - | 6000-6800 * | New 5cm receiver | |On85 | yes | yes | 5700-6725 * | changes in the PRC file | |Tr | no | no | 5900-6900 * | 15min break between freq | |Ar | | | 5200-6100 * | | |Hh | yes | no | 5900-6750 | | ------------------------------------------------------------------------ SCHED CONTR=switch 6.0/6.7 automatically from schedule. LOCAL CMDS=extra local commands must be inserted in schedule. * Frequency range from the SCHED: freq.dat file TABLE IIIC UHF (30cm) FREQUENCY RANGES ------------------------------------------------------------------------------- |SITE | FREQUENCY RANGE(S) | POLSN. | FILTER | STRONG INTERFERENCE | ------------------------------------------------------------------------------- |Ef | 800 - 1300 | LCP+RCP| 100MHz | 750-790,800,822-830,880-930,| | | | | | 940-960,960-1005,1089-1091 | |Wb | 750 - 1200 | LCP+RCP| ? | | |On-25| 780 - 1200 | LCP+RCP| 40MHz | 920-970,1010-1170 | |Nt | 600 - 1000 | LCP or | 5% | | | | | or RCP | | | |Tr-32| 780- 925, 965-1105 | 2xLIN | ? | ca.943 | |Tr-15| 780- 925, 965-1105 | LCP+RCP| ? | ca.943 | |Ur | 790 - 1120 | LHC | none | 872-882,928-963 | |Ar | 1100-1400 | LCP+RCP| ? | | ------------------------------------------------------------------------------- TABLE IV EVN RECORDING EQUIPMENT ** NOTES ** ** The EVN is currently recording with Mark5 (disks) only ** ** ** ** The VLBA correlator is also correlating with Mark5 units ** ** Thin tape recording capability is maintained in some sta- ** ** tions but this will become obsolete soon ** ** ** ** New column (eV) - eVLBI capability ** ------------------------------------------------------------------------- |TELESCOPE| RECORD MK5|eV|NO.|TP|REC MODES |NO. NARROW-BAND FILTERS| | Code | TERMINAL A|B| |BBC| |VLBA MK-4| 125(250a)500(1000a)kHz| |---------|--------------|-|- |---|--|----------|-----------------------| | Jb-1/2 |# MK4 Y| |Y | |Tt|all- all+| 8 6 8 4 | | Cm |# VLBA+4 Y| |Y | 8 |Tt|all all+| (b) | | Wb | MK4 Y| |Y | | t|all- all+| 8 7 8 4 | | Ef |$ MK4 Y| |Y | | |all- all+| 8 6 8 5 | | Eb |$ VLBA+4 |Y| | 8 | t|all | (b) | | Mc | MK4 Y| |Y | | t|all- all+| 18 6 18 6 | |---------|--------------| |- |---|--|----------|-----------------------| | Nt | VLBA+4 Y| |Y |14 | |all all+| (b) | | On-85/60| MK4 Y| |Y | | t|all- all+| 8 4 8 4 | | Sh | VLBA+4 Y| | |14 | t|all all+| (b) | | Ur | MK4 Y| | |14 | t|all all+| 7 0 7 0 | | Tr | VLBA+4 Y| |Y | 8 |Tt|all all+| (b) | |---------|--------------|-|- |---|--|----------|-----------------------| | Mh | VLBA4 Y| |Y |14@| |all- all+| (b) | | Yb | VLBA4 |Y| |14 |Tt|all all+| (b) | | Ar | VLBA4 Y| |Y | 8 | t|all all | (b) | | Wz (c) | MK4 Y| | | |Tt|all all | 3 3 3 3 | | Hh | MK4 Y| |Y | | t|all- all+| 8 2 8 2 | ------------------------------------------------------------------------- | Rob70/34| MK4 Y| | | |Tt|all- all+| 4 0 4 0 | | Sm | MK3A | | | | t|none | ? ? ? ? | | Ka | K3/4 | | | |T?| ??? | ? ? ? ? | | Mr | MK3A | | | |T | ??? ??? | ? ? ? ? | | Ny | MK4 Y| | | | t|all- all | 4 0 4 0 | ------------------------------------------------------------------------- # Normally, the MK4 terminal is used for Jb telescopes, and the VLBA terminal for Cm. Two Mk5A units are now available, one is connected to Cm. In special cases, changes in this arrangement could made, by prior consultation with Jb VLBI Friend. $ At Effelsberg: use the MK4 terminal for projects requiring > 8 BBCs, for MK4 modes (>256 Mb/s), for MK3 modes and for Mk5; use the VLBA terminal for experiments that require 8 or less BBCs in particular: global, VLBA correlator, VLBA modes, all requiring continuous Tsys calibration or frequency-agility. The Mk4 DATA aquisition Terminal is connected to the Mark 5A RECORDER The VLBA terminal is connected to the Mark5B recorder. @ 14 BBCs are installed at Mh. Only 8 are currently usable through all frequencies. T Can record with "thick" tape t Can record with "thin" tape VLBA4 VLBA terminal with MK4 formatter VLBA+4 VLBA terminal with both MK4 (default) and VLBA formatters all- All VLBA modes recorded with MK4 formatters have now been validated for inter-operability with the VLBA. However, there are still some restrictions resulting from differences between VLBA and MK4 terminals. Users should consult the document OK_modes.vlba which is available via anonymous ftp from: ftp.aoc.nrao.edu directory: pub all+ The full range of MK4 modes, including bit rates 1024 Mbps, is now operational (Jan 2002). 512Mb/s not yet tested in Wetzell. (a) 250 and 1000 kHz filter must be on external slots for MK4 terminals ===> NOT VALIDATED FOR USE WITH VLBA CORRELATOR (b) VLBA terminals have all filters for every BBC channel (c) Recommend use of "geodetic patching" modes at 13, 3.6 cm at Wz (yy) Planned for year 20yy Cambridge Recording ------------------- The MERLIN signal from the Cambridge telescope returns to Jodrell on micro- wave links (max. BW = 30 MHz) and is recorded on a VLBA terminal with 8 BBCs. As a result, the VLBI observing bands which can be recorded are restricted. (But the signal CAN be 2-bit sampled when recording VLBA/MK4 modes) Although the rest of MERLIN is dual polarisation for all experiments, the Cambridge signal may be either (i) single LHC polarisation or (ii) dual circular polarisation, and can be decided by the PI. The default will be (i) for single polarisation and (ii) for dual polarisation VLBI recording modes. ============================================================================== MERLIN OBSERVING PARAMETERS --------------------------- 1) System parameters for observation of a continuum source C-Band L-Band ------ ------ Observing frequencies available 4.5-5.2 1.35-1.43 GHz (21cm) 1.57-1.73 GHz (18cm) Maximum bandwidth per polarisation ~ 15 ~ 15 MHz Maximum angular resolution ~ 40 ~ 150 milliarcsecs. R.M.S. noise level for 12 hr. on source ~ 0.05 ~ 0.06** mJy per beam (in good weather) ** Use of the Lovell telescope reduces the rms to ~0.030 mJy/beam at L-Band and to ~0.020 mJy/beam at C-band. K-Band Methanol & OH ------ ------------- Observing frequencies available 21-24 6.0-7.0 GHz Maximum bandwidth per polarisation ~ 15 ~ 15 MHz Maximum angular resolution ~ 8 ~ 40 milliarcsecs. R.M.S. noise level for 12 hr. on source ~ 0.40 ~ 0.05## mJy per beam (in good weather) ## Only a single baseline between Cambridge and Mk2 is available at 6-7 GHz 2) MERLIN correlation: For spectral line work, the maximum number of frequency channels per baseline (to be divided between the 4 polarizations) for bandwidths of 16 MHz, 8 MHz, 4 MHz, 2 MHz and <2 MHz are 64, 128, 256, 512 and 512, respectively. The minimum total bandwidth is 125 kHz. 3) Further information can be obtained via: www URL http://www.jb.man.ac.uk/merlin/evn+merlin.html www URL http://www.jb.man.ac.uk/merlin/MERLIN.html email merlin@jb.man.ac.uk ============================================================================= The latest confirmation of information from observatories was: Hh 20 08 07 SEFD for 1.3cm dual pol RX (from N07K1) Ur 30 03 05 18cm increased freq range from "freq.dat" Cm 12 11 03 * 24 01 02 Jb 14 09 04 Update 21cm/18cm freq. and rms for MERLIN Sm 25 03 04 New 18cm 6cm receivers On 27 11 06 Dual Poln 18-50GHz RX, for 1.3cm 0.7cm SEFD pending Nt 29 04 08 5cm SEFD from NME (7mmRX SEFD(LCP/RCP)=900/1100Jy) Mh 28 06 05 VLBA4 recorder not available Tr 12 11 03 10 06 06 New UHF-21cm freq range-Dual Poln of 30cm receiver Wz 25 11 98 Mc 13 10 06 New 6cm RX, (EVN Newsl #15) previous SEFD was 330Jy No 0.7cm RX SEFD, used to be 2800L Eb 29 04 08 Mk5B recording with VLBA terminal Sh 22 11 05 New L band freq range & SEFD 540L 580R New C band freq range 4700-5150 Dual Pol 6cm (SEFD 664L/659R)-SEFD 1.3 2185L 1885R Yb 13 05 08 New Yebes 40M - 1.3cm - Mark 5B Wb 06 02 07 5cm Frequency set from Field System Ro 21 03 06 Ro34 new 13cm HEMT SEFT, Freq Agility 7mm RX (2008) Ar 26 03 04 New SEFD for X band receiver - Mk5 ordered Ny 07 02 01 Ka * 07 02 01 JI 05 03 02 New TABLE IIIA detailing 21/18cm frequency coverage and agility. Thanks to D.Graham for organising this. New Table IIIB detailing the 6.0/6.7GHz (5cm) agility New Table IIIC detailing the 30cm frequency coverage and known RFI (29 05 08) Table IV - clean out Mk3 modes and description, split out Mark5A and Mark5B New column e = eVLBI capability The previous Table IV with details on Mark3 modes and tapes can be found in http://www.evlbi.org/user_guide/EVNStatus_TableIV_Mark3.txt This file is kept at: http://www.evlbi.org/user_guide/EVNstatus.txt ==============================================================================