Abstract
We use the KODAK IIIa-J emulsion to obtain deep prism plates with the former Hamburg Schmidt telescope now operating at Calar Alto Observatory/Spain. The plates are scanned in Hamburg with a PDS microdensitometer to search for quasars (Hagen et al., 1986). To reach optimum sensitivity the plates are baked at 65° C in nitrogen. Under the weather conditions on Caler Alto a desensitization of the plates during exposure (t ~ 1 hour) is probable, as they are not protected against contact with ambient air. Test series were performed in February 1987 on Calar Alto to obtain a measure of this effect for typical humidity values.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Hagen,H.J., Groote,D., Engels,D., Haug,U., Reimers,D.: 1986, Mitt.A.G. 67, 184
Smith,A.G.: 1978, in Modern Techniques in Astronomical Photography, eds. West/Heudier, ESO-Workshop.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1988 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Engels, D., Schröder, K.P. (1988). Desensitization of Hypersensitized IIIa-J Plates by Exposure to Ambient Air. In: Marx, S. (eds) Astrophotography. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83268-0_10
Download citation
DOI: https://doi.org/10.1007/978-3-642-83268-0_10
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-83270-3
Online ISBN: 978-3-642-83268-0
eBook Packages: Springer Book Archive