Tucker et al. 1976

Tucker, K.D., R.L. Dickman, P.J. Encrenaz, and M.L. Kutner, 1976: The relation between carbon monoxide emission and visual extinction in cloud L134. Astrophys. J., 210, 679-683, doi:10.1086/154874.

Emission from the J = 1→0 transition of carbon monoxide has been mapped over an area of 40'×55' in cloud L134, and visual extinctions over the entire cloud have been obtained by means of star counts. Line intensities of => 2 K are observable down to an extinction level of about one magnitude. From observations of the J = 1→0 transition of the ¹³CO isotopic species at 18 locations in the cloud, we have found a linear correlation between the local thermodynamic equilibrium (LTE) column densities of ¹³CO and magnitudes of visual extinction.

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Tucker, K.D., Dickman, R.L., Encrenaz, P.J., and Kutner, M.L.: The relation between carbon monoxide emission and visual extinction in cloud L134, Astrophys. J., 210, 679-683, doi:10.1086/154874, 1976.

Tucker, K.D., R.L. Dickman, P.J. Encrenaz, and M.L. Kutner (1976), The relation between carbon monoxide emission and visual extinction in cloud L134, Astrophys. J., 210, 679-683, doi:10.1086/154874.

Tucker, K.D., R.L. Dickman, P.J. Encrenaz, and M.L. Kutner, 1976: The relation between carbon monoxide emission and visual extinction in cloud L134. Astrophys. J., 210, 679-683, doi:10.1086/154874.

Tucker, K.D., Dickman, R.L., Encrenaz, P.J., & Kutner, M.L. 1976, Astrophys. J., 210, 679, doi:10.1086/154874.

Tucker KD, Dickman RL, Encrenaz PJ, Kutner ML. The relation between carbon monoxide emission and visual extinction in cloud L134, Astrophys J 1976;210:679-683. doi:10.1086/154874.

K.D. Tucker, R.L. Dickman, P.J. Encrenaz, M.L. Kutner, Astrophys. J. 210, 679-683, doi:10.1086/154874 (1976).