Calibration

Since BEARS is operated in DSB mode, you must calibrate the difference of sideband ratio among receiver channels. NRO provides the calibration data (scaling to the data taken with S100+AC45 in Ta* scale) for the spectral lines (rest frequency) included in the accepted proposals. If possible, we recommend that observers get the calibration data by themselves during their observing time.

How to calibrate

Calibration data -Valid for 2013.12-2014.5

Calibration data for this season (2013.12-2014.5) are available here. We supply calibration data for some spectral lines;12CO 1-0 (USB) and HCO+ 1-0 (LSB) at the rest frequency of each line.

Calibration data -Valid for 2012.12-2013.5

Calibration data for this season (2012.12-2013.5) are available here. We supply calibration data for some spectral lines;12CO 1-0 (USB), 13CO 1-0 (USB), C18O 1-0 (USB), and HCO+ 1-0 (LSB) at the rest frequency of each line.

Calibration data -Valid for 2011.12-2012.5

Calibration data for this season (2011.12-2012.5) are available here. We supply calibration data for some spectral lines;12CO 1-0 (USB), 13CO 1-0 (LSB), C18O 1-0 (LSB), H13CO+ 1-0 (LSB), and CS 2-1 (LSB) at the rest frequency of each line.
There is an important note about the calibration data in this season. (2013/08/09)

Calibration data -Valid for 2010.12-2011.5

Calibration data for this season (2010.12-2010.5) are available here. We supply calibration data for some spectral lines;12CO 1-0 (USB), 13CO 1-0 (LSB), C18O 1-0 (LSB), H13CO+ 1-0 (LSB), and SiO 2-1 (LSB) at the rest frequency of each line.
There is an important note about the calibration data in this season. (2013/08/09)

Calibration data -Valid for 2009.12-2010.5

Calibration data for this season (2009.12-2010.5) are available here. Now we supply calibration data for some spectral lines;12 CO 1-0 (USB), 13CO 1-0 (LSB), C18O 1-0 (LSB), H13CO+ (LSB), and N2H+ (LSB) at the rest frequency of each line.
There is an important note about the calibration data in this season. (2013/08/09)

Calibration data -Valid for 2008.12-2009.5

Calibration data for this season (2008.12-2009.5) are available here. Now we supply calibration data for some spectral lines; CO 1-0 (USB), 13CO 1-0 (LSB), C18O 1-0 (LSB), HCN 1-0 (LSB), HCO+ 1-0 (LSB), H13CN 1-0 (LSB), H13CO+ 1-0 (LSB), and CN 1-0 (USB), at the rest frequency of each line.
There is an important note about the calibration data in this season. (2013/08/09)

Calibration data -Valid for 2007.12-2008.5

Calibration data for this season (2007.12-2008.5) are available here. We will supply calibration data for some spectral lines; CO 1-0 (USB), 13CO 1-0 (LSB), C18O 1-0 (LSB), H13CO+ 1-0 (LSB), etc. at the rest frequency of each line.
There is an important note about the calibration data in this season. (2013/08/09)

Calibration data for the past seasons (-2007.5)

Calibration data for the past seasons (2000.5-2007.5) are here.