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information_for_astronomers:rx:s45mm
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information_for_astronomers:rx:s45mm [2016/11/29 20:57] akraus |
information_for_astronomers:rx:s45mm [2020/09/29 08:17] 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) ====== | ||
| - | To be installed soon. | + | 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): |
| + | |||
| + | ^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 ^ |
| - | |4.850 |A / B |LCP / RCP |1.8 |27 |1.55 |18 |53 |2.4 |63 |146 |June 2008| | + | |5.250 |1+2 |lin |3.1 |35 |1.60 |22 |56 |2.0 |71 |140 |Oct 2019| |
| + | |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:** | ||
| * The gain curve was corrected for opacity (though it is small, < 0.02 throughout the band). | * The gain curve was corrected for opacity (though it is small, < 0.02 throughout the band). | ||
| + | |||
| ==== Version description for OBSINP ==== | ==== Version description for OBSINP ==== | ||
| Line 21: | 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 | | ||
| + | |||
| + | N_Chan ... number of spectral channels\\ | ||
| + | f_center ... 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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