OBJOd : object fiber only, direct fibers
OBJOs : object fiber only, scrambled fibers
OBJ2d : object fiber and sky in second fiber, direct fibers
OBJ2s : object fiber and sky in second fiber, scrambled fibers
OBTHd : object fiber and Thorium in second fiber, direct fibers
OBTHs : object fiber and Thorium in second fiber, scrambled fibers
Prior to 1997, only one set of fibers (the 'direct' set) was available, and thus only OBJO, OBJ2 and OBTH are found.
Note: Users should note that for image types OBTH, OBTHs and OBTHd the presence of the Thorium-Argon orders interleaved with the stellar orders may lead to pollution of the stellar spectrum by highly saturated Argon lines which bleed into the adjacent stellar orders.
This archive is actively maintained. We thus welcome feedback from the user to help us detect anomalies and improve the website.
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