High-resolution measurements have been made on the infrared 
emission spectrum of the double substituted HCN isotopomer,
H^13C^15N, at temperatures on the order of 1370 K.
The measurements cover the region
400 - 850 cm^-1 with a resolution of 0.006 cm^-1. 
We could assign hot bands with upper levels up to 0 11^11 0 state.
The assignments have been verified for states up to v_2=5 by
fitting with earlier room temperature absorption measurements of
overtone and hot bands. 
All the measurements for H^13C^15N have been combined in a
single least-squares fit that includes approximately 8670 rovibrational 
lines which have a root-mean-square deviation on
the order of 0.000 33 cm^-1.   
The  spectroscopic constants for
the bending states \it v_2 = 1,...,11 are reported, as well as
for some combination states involving the two stretching modes.

This work continues our analogous measurements of
H^12C^14N, H^12C^15N, and H^13C^14N, see 
A. Maki, G. Ch. Mellau, S. Klee, M. Winnewisser, and W. Quapp,
J.Mol.Spectrosc. 202, 67-82 (2000) 
whereas the experimental setup is given in
W. Quapp, M. Hirsch, G. Ch. Mellau, S. Klee, M. Winnewisser, and A. Maki, 
J.Mol.Spectrosc. 195, 284-298 (1999).