Calculate the HI Column Density for a Sky Position

nH is calculated using all points (from https://vizier.u-strasbg.fr site.) within r_arcmin

nh(ra = NULL, dec = NULL, r_arcmin = 10, showInfo = FALSE)

Arguments

ra

RA in degrees

dec

DEC in degrees

r_arcmin

search radius in arcmin

showInfo

show additional information ? Default=false

Value

weighted nH

Examples

if (FALSE) {
 xrayr::nh(213.2, -65.4, r_arcmin = 30, showInfo = T)
}