An H I survey of the Bootes void .1. The data

We present the results of a neutral hydrogen survey of the Bootes void carried out with the VLA(2) [Napier et al., Proc. Inst. Electron. Electric. Eng. 71, 1295 (1983)] in D array. The survey covers similar to 1100 Mpc(3) about 1% of the volume of the void as defined by Kirshner et al., [ApJ, 314, 493 (1987)]. We observed 24 fields, centered on known void galaxies; 16 of these were detected in H I. Eighteen uncataloged companion galaxies were discovered directly in the H I line at distances of 45'' to 14.5' from the target galaxies. We also present the results of follow-up optical imaging observations and discovery of one additional Bootes void galaxy, found through spectroscopy of a number of apparent companions to known void members. Our angular resolution is similar to 1' (45 kpc)3, each field has a size of similar to 1 degrees (2.7 Mpc). The detected H I masses range from 8x10(8) to 1X10(10) M(circle dot). Typically our 2 sigma H I column density sensitivity is 2x10(19) cm(-2). The radio and optical data are analyzed and discussed in the following companion article (Paper II, Szomoru et al. 1996). (C) 1996 American Astronomical Society.