Quantized rotating Taub-bolt instantons

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We argue that previously suggested metrics for rotating Taub-bolt instantons do not satisfy all the necessary regularity conditions, and we present a family of new regular rotating Taub-bolts labelled by an odd integer k. There are two types of rotating bolt solutions. The first infinite sequence starts with non-rotating Taub-NUT with positive mass Mₖ=N for a=0 and goes to (k-2)N for |a|→ ∞ (or N for k=1), where a is the rotation parameter. For the second sequence of rotating Page bolts, the masses Mₖ go through the value Mₖ=5N/4 for a=0 and asymptote to (k+2)N for |a|→ ∞.