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The latest SDSS/APOGEE data release DR14 has provided an increased number ofstellar spectra in the H band and associated stellar models using an innovativealgorithm known as The Cannon. We took advantage of these novelties to extractthe 15 273 {\AA} near-infrared DIB and to study its link with dust extinctionand emission. We modified our automated fitting methods dedicated to hot starsand used in earlier studies with some adaptations motivated by the change fromearly- or intermediate-type stars to red giants. A new method has also beendeveloped to quantify the upper limits on DIB strengths. We compared our DIBmeasurements with the stellar extinctions Av from the Starhorse database. Wethen compared the resulting DIB-extinction ratio with the dust optical depthderived from Planck data, globally and also separately for nearby off-Planecloud complexes. Our analysis has led to the production of a catalog containing124 064 new measurements of the 15 273 {\AA} DIB, allowing us to revisit thecorrelation between DIB strength and dust reddening. The new data revealclearly that the sky-averaged 15 273 {\AA} DIB strength is linearly correlatedwith Av over two orders as reported by earlier studies but leveling-off withrespect to extinction for highly reddened lines-of-sight behind dense clouds.The comparison with Planck individual optical depths reveals in a conspicuousway this DIB depletion in the dense cores and shows it applies to all off-Planedense clouds. APOGEE measurements confirm the ubiquity of the 15 273 {\AA} DIBcarrier decrease with respect to dust grains in dense cloud cores, in a mannerthat can be empirically related to the dust optical depth reached in the cloud.

Updated extraction of the APOGEE 1.5273 {\mu}m diffuse interstellar band: a Planck view on the carrier depletion in dense cores