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information_for_astronomers:rx:s45mm
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information_for_astronomers:rx:s45mm [2016/11/29 22:03] akraus |
information_for_astronomers:rx:s45mm [2020/09/29 08:16] akraus |
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| ====== 4.5cm broad band C/X secondary focus receiver (4000-9300 MHz) ====== | ====== 4.5cm broad band C/X secondary focus receiver (4000-9300 MHz) ====== | ||
| - | This is a broad-band receiver with two linear polarizations. The system is | + | This is a broad-band receiver with two orthogonal linear polarizations (at a 45°-angle with the horizon). The receiver (in most setups simultaneously) delivers 4 basebands (each with two polarizations): |
| - | still under test, but could be used on a "shared-risk" basis. | + | |
| + | ^Baseband^Center Frequency^Bandwidth^Comment^ | ||
| + | |1|5.250 GHz| 2500 MHz| beware of strong RFI at frequencies < 4.5 GHz!| | ||
| + | |2|6.750 GHz| 2500 MHz| | | ||
| + | |3|6.668 GHz| 200 MHz| for methanol observations| | ||
| + | |4|4.829 GHz| 200 MHz| for formaldehyde observations| | ||
| ==== Calibration Information ==== | ==== Calibration Information ==== | ||
| - | ^ Frequency [GHz] ^ Channel ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | + | ^ Frequency [GHz] ^ Channel ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ HPBW [arcsec] ^ Last update ^ |
| - | |6.668 |A |lin |4.5 |36 |1.54 |23 |54 |2.2 |63 |102 |Nov 2016| | + | |5.250 |1+2 |lin |3.1 |35 |1.60 |22 |56 |2.0 |71 |140 |Oct 2019| |
| - | |6.668 |B |lin |4.1 |41 |1.54 |26 |54 |2.2 |63 |102 |Nov 2016| | + | |6.750 |1+2 |lin |4.5 |37 |1.40 |26 |49 |1.6 |58 |105 |Oct 2019| |
| + | |6.668 |1+2 |lin |3.6 |34 |1.39 |24 |49 |1.7 |60 |109 |Oct 2019| | ||
| + | |4.829 |1+2 |lin |2.8 |42 |1.59 |26 |56 |1.8 |65 |146 |Oct 2019| | ||
| ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ||
| - | |A0 = 0.9928|A1 = 4.212E-4|A2 = -6.158E-6|Jun 2016| | | + | |A0 = 0.9928|A1 = 4.212E-4|A2 = -6.158E-6|Jun 2016| Oct 2019 | |
| **Comments:** | **Comments:** | ||
| Line 23: | Line 31: | ||
| ==== Channel assignment in the MBFITS data files ==== | ==== Channel assignment in the MBFITS data files ==== | ||
| + | ==== Spectroscopy modes and resolution ==== | ||
| + | |||
| + | ^Baseband^f_center^Bandwidth^N_Chan^Df^Dv^dv^ | ||
| + | ^ ^ GHZ ^MHz ^ ^kHz^km/s^km/s^ | ||
| + | |1|5.25|2500|65536|38.1|2.18|2.53| | ||
| + | |2|6.75|2500|65536|38.1|1.69|1.96| | ||
| + | |3|6.668|200|65536|3.05|0.137|0.159| | ||
| + | |4|4.829|200|65536|3.05|0.189|0.219 | | ||
| + | |||
| + | BW ... band width\\ | ||
| + | nchan ... number of spectral channels\\ | ||
| + | nu ... center frequency\\ | ||
| + | Df ... Channel separation (in frequency)\\ | ||
| + | Dv ... Channel separation (in velocity)\\ | ||
| + | dv ... Velocity resolution (dv=1.16*Dv) | ||
| ==== Tcal and Tsys measurements ==== | ==== Tcal and Tsys measurements ==== | ||
| + | |||
information_for_astronomers/rx/s45mm.txt · Last modified: 2022/08/11 11:15 by akraus
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