hetgcal> @meas_line_angle  

 HEG   15.010 A line,  acis_f1235_000N002_g02346_evt1a.fits

  Plus-side:       2688.93     -247.056
 Minus-side:      -2687.73      245.617
      Angle:      -5.23551

hetgcal> @meas_line_angle

 MEG   15.010 A line,  acis_f1235_000N002_g02346_evt1a.fits

  Plus-side:       1345.39      110.168
 Minus-side:      -1344.67     -112.212
      Angle:       4.72574