Observations 1. Observing Lines & Frequencies 13CO J=1 - 0, 110.201353 GHz 2. Observed Regions/target sources Heiles' Cloud 2 3. Observing period: Dec. 1992 --- Mar. 1994 4. Receiver frontend: S115Q 5. Receiver backend: AOS-H 6. Frequency & Velocity resolutions: 37.0 kHz, 0.1 km/s 7. Total bandwidth & Velocity Coverage: 40 MHz, 109.3 km/s 8. Typical system temperature & typical atmospheric opacity: 270 K --- 500 K @El 70 Degree 9. Main-beam efficiency: 51 % 10. Observation mode: OTF / position switch / frequency switch position switch 11. OFF Position (s) if OTF/Position switch is applied; (4h38m38s, 26d35'45") (B1950) 12. Pointing Calibration & Pointing error: NML-Tau, < 5 arcsec. 13. Intensity Calibration & Accuracy of absolute scale: Orion KL & map center 10% 14. Noise level: Ave. 0.33 K, s.d. 0.08 K 15. CUBE FITS Information Mapping area: BLC(4h39m25.6s, 25d08'33.0") TRC(4h34m53.3s, 26d43'11.0") Velocity -5 -- 15 km/s Grid spacing: 34.0" CUBE size: (x, y, z) 109 x 168 x 200 16. Other information