In this blog, I list and introduce some telescopes working in the centimeter/millimeter/sub-millimeter/infrared bands whose calls for proposal are open to Chinese researchers. Please note that the avialable instruments may change in different semester. Please refer to the official websites for more detailed and accurate information.

cm/mm/sub-mm Telescopes

Telescopes in China

1. Purple Mountain Observatory at Delingha (PMOD): 13.7 m millimeter telescope.
   Band: 85-115 GHz
   Line observation: a bandwidth of ~ 1 GHz and a velocity resolution of ~ 0.2 km/s
   Time for proposal: Proposal can be submitted throughout the year, but in winter, the telescope is dedicated to the MWISP observations.
   Notes: The telescope has a 3$\times$3 beam receiver to speed up mapping observation. You may need to ask the staff at PMOD for detailed information about the proposal writing and sensitivity estimation.
2. Tianma Radio Telescope (TMRT): A 65 m radio telescope operated by Shanghai Astronomical Observatory (SHAO).
   Band: 1350 MHz to 50 GHz (currently the X and Ka band, i.e. 8-9 and 30-34 GHz, receivers are not available)
   Line observation: Many modes for spectral line observation, for example, 1.5 GHz bandwidth with 61 kHz resolution and 8 spectral windows each with a 23.44 MHz bandwidth and 5.7 kHz resolution.
   Time for proposal: August in NAOC English website
   Notes: You may need to ask the staff at SHAO for detailed information about the proposal writing and sensitivity estimation.

Telescopes in other countries in the northern hemisphere

1. IRAM 30m (Institut de radioastronomie millimétrique): 30m mm/submm telescope
   Band: 72.68-117, 125-184, 202-274, and 277-350 GHz.
   Line Observation: FTS200: 4$\times$8 GHz with 195 kHz resolution, and FTS50: 8$\times$1.8 GHz with 50 kHz resolution
   Time for proposal: deadline in mid-March and min-September, and same for NOEMA
2. NOEMA: mm/submm interferometer (ten to twelve 15m antennas)
   Band: 71-119, 127-182 and 197-276 GHz
   Configuration: up to 760m, beam ~ 3.5 arcsec (configuration D) and ~ 0.5 arcsec (configuration A) at 100 GHz
   Line Observation: 64 chunks (64 MHz bandwidth, 62.5 kHz resolution) in two 7.7 GHz sideband
   Notes: Proposal is only open to some specific institutes in China (e.g. NJU).
   
3. Yebes 40m radio telescope: 40m mm telescope
   Band: 31.3-50.6 and 72-90 GHz
   Line Observation: 18.5 GHz bandwidth with 38 kHz resolution (~ 0.11 km/s at 80 GHz)
   Time for proposal: deadline in ~ January and July/June every year.
   Notes: Not very competitive. Proposals are encouranged.
4. James-Clerk-Maxwell Telescope (JCMT): 15m submm telescope
   Band: 325-375 GHz (HARP), 215-270.6 GHz (Uu)
   Line observation: 250 MHz (30.5 kHz resolution with one 250 MHz mode) to 1860 MHz (97.7 kHz resolution)
   Time for proposal: deadline in mid-March and mid-September
   Notes: HARP is a 16 beam receiver.
   
5. Green Bank Telescope (GBT): 100m radio telescope
   Band: 290 MHz to 116 GHz
   Line observation: Many modes for spectral line observation, for example, 1.25 GHz bandwidth with 92 kHz resolution and 8 spectral windows each with a 23.44 MHz bandwidth and 5.7 kHz resolution.
   Time for proposal: deadline in 1st Feburary and 1st August, and same for VLA
   Notes: There are several multi-beam receivers. Obervations at >50 GHz are only limited to nights in winter, and little time is available. You need to observe remotely by reself after some training.
   
6. Very Large Array (VLA): radio interferometer (twenty-seven 25m antennas)
   Band: 1-50 GHz
   Configuration: 3.1 arcsec (configuration D) and 0.089 arcsec (configuration A) at 22 GHz
   Line observation: see the call for proposal page for details
   Notes: VLA can mainly be used to observed the NH3 lines, and SiO, CH3OH, and some carbon chains.
   
7. Sub-millimeter Array (SMA): submillimeter interferometer (eight 6m antennas)
   Band: 180-418 GHz
   Configuration: baseline 8-509m, 2.5 arcsec (subcompact) and 0.3 arcsec (very extended) at 345 GHz
   Line observation: four 12 GHz sidebands with 140 kHz resolution
   Time for proposal: deadline in mid-March and mid-September
   Notes: SMA has relatively limited sensitivity except for very compact and bright sources.
   

Telescopes in other countries in the southern hemisphere

1. Astralia Telescope Compact Array (ATCA): A radio interferometer (six 22m antennas).
   Band: 1.1-3.1, 3.9-11, 16-25, 30-50, and 83-105 GHz
   Configuration: The most extended configurations are the 6A to 6D configurations with up to 6 km baselines, while the most compact comfiguration is the H75 configuration with ~ 30.6-75 m baseline.
   Line observation: The CABB backend provides 16 zoom bands in a total 2 GHz bandwidth for spectral line observations, each covering 64 MHz with a resolution of 31.25 kHz. However, CABB may be replaced in the coming semesters.
   Time for proposal: December and June
   Notes: The sensitivity of ATCA is not very high for spectral line observaiton. I tend to use it only for NH3 observation with H168 configuration (~10 arcsec beam). You need to observe remotely by reself after some training.
2. Atacama Large Millimeter/submillimeter Array (ALMA): The best instrument in the world.
   50 12m antennas, 12 7m antennas (ACA), and 4 12m antennas (TP).
   Band: 35-950 GHz
   Line observation: 2$\times$4 GHz bandwidths with different resolutions.
   Time for proposal: About April
   Notes: See the Proposer’s Guide for details.
   

IR Telescopes

Chinese researchers can access large optical/infrared through Telescope Access Program (TAP) at NAOC issued in March and Septemter and the NSF’s NOIRLab Call for Proposals (deadline approximately on 1st April and 1st Oct every year).

Telescopes in the northern hemisphere

1. Canada-France-Hawaii Telescope (CFHT, 3.6m, TAP)
   WIRCam: 4 detectors with 21.5 arcmin FOV, 0.306 arcsec/pix, 1-2.3 $\mu\rm m$, with H2 v=1-0 S(1) (2122$\pm$32 nm), K continuum (2218$\pm$33 nm), and Ks (2146$\pm$325 nm) filters.
   SPIRou: 0.95-2.35 $\mu\rm m$ with resolution ~75000.
   
2. Palomar Hale Telescope (P200, 5.1m, TAP)
   WIRC: 8.7 arcmin FOV, 0.25 arcsec/pix, with H2, K, Ks filters.
   TSpec: 1-2.5$\mu\rm m$ with resolution of 2500-2700.
   
3. Infrared Telescope Facility (IRTF, 3.2m, open)
   SpeX: 0.7-5.3$\mu\rm m$ with R ~ 200-2500 with different modes to cover different bands.
   iSHELL: 1.1-5.3$\mu\rm m$ with R ~ 75000 with different modes to cover different (relatively narrow) bands
   TEXES (visitor instrument): 5-20 and 22-25$\mu\rm m$ with R ~ 40000-100000
   Time for proposal: deadline approximately on 1st April and 1st Oct every year
   Notes: Not very competitive. Proposals are encouranged.
   
4. Gemini North (8m, NOIRLab) availble intruments depend
   GNIRS: 1-5.4$\mu\rm m$ with R~1200-18000, or 0.1-0.34 arcmin FOV imaging with H2 and K filters, or two modes of IFU.
   NIRI: 120-22 arcsec FOV, 0.117-0.022 arcsec/pix, with H2 v=1-0 S(1) (2123.9$\pm$26 nm), [FeII] (1644$\pm$25 nm), K continuum (2097.5$\pm$27 and 2271.8$\pm$35 nm) and H continuum (1570$\pm$23.6 nm) filters.
   
5. Subaru telescope (8.2m, through time exchange with Gemini in NOIRLab)
   IRCS: 0.9-5.6$\mu\rm m$ with R up to 20000
   
6. Keck (10m, Keck I and II, sometimes open to NOIRLab)
   MOSFIRE (Keck I): NIR multi-object spectrograph, 0.9-2.5$\mu\rm m$, R ~ 3300
   OSIRIS (Keck I): NIR IFU with R ~ 3800
   NIRES (Keck II): NIR spectroscopy, R ~ 2700, simultaneously 0.94-2.45 $\mu\rm m$
   NIRC2 (Keck II): NIR imager, 1-5 $\mu\rm m$, FOV = 10, 20, or 40 arcsec, 10, 20, or 40 milliarcsec/pix
   NIRSPEC (Keck II): 0.95-5.5$\mu\rm m$ with R ~ 25000
   

Telescopes in the southern hemisphere

1. Gemini South (8m, NOIRLab) availble intruments depend
   FLAMINGOS-2: 6 arcmin FOV, 0.18 arcsec/pix with some broad band filters
   GSAOI: NIR adaptive optics imager, 0.9-2.4 $\mu\rm m$, FOV=85 arcsec, 0.02 arcsec/pix
   
2. Cerro Tololo Inter-American Observatory (CTIO, 4m, NOIRLab)
   NEWFIRM: 27.6 arcmin FOV, 0.4 arcsec/pix, with H2 (2131.9, FWHM 24.0 nm), [FeII] (1649.1, FWHM 17.2 nm), and some continuum filters.
   
3. Southern Astrophysical Research Telescope (SOAR, 4.2m, NOIRLab)
   SPARTAN Near-IR Camera: 5 arcmin FOV, 0.066 arcsec/pix, with H2 (2116, FWHM 31.0 nm), [FeII] (1640, FWHM 14 nm), narrow K continuum (2140, FWHM 30 nm), and some broad continuum filters.
   TripleSpec: 0.8-2.47$\mu\rm m$, resolution ~ 3500
4. Very Large Telescope (VLT, 4 8.2m)
   KMOS (on UT1): IFU with R ~ 2000-4200, 64.9$\times$43.3 arcsec FOV in mosaic mode
   VISIR (on UT2): imaging and spectrography, at 5, 8-13 and 17-20 $\mu\rm m$, 1 arcmin FOV or R ~ 25000
   CRIRES (on UT3): 0.95-5.3$\mu\rm m$ with R up to 92000.
   HAWK-I (on UT4): 7.5 arcmin FOV, 0.11 arcsec/pix, with H2 and continuum filters.
   ERIS (on UT4): NIX: JHKLM band imaging, 13 milliarcsec/pix, FOV=27 arcsec
   Time for proposal: issued at the end of February and at the end of August
5. Magellan Telescope (2 6.5m, sometimes open to NOIRLab)
   FourStar (Magellan I): 10.8 arcmin FOV, 0.16 arcsec/pix, some continuum filters
   FIRE (Magellan I): 0.8-2.5$\mu\rm m$ with R ~ 6000-8000