ALFALFA and MaNGA

ALFALFA & MaNGA match

Here, I used the v1_2_0 version catalog of MaNGA "MaNGA_targets_extNSA_tiled.fits" and $\alpha$ 40 of ALFALFA.[1] I also supplemented the SDSS information to ALFALFA $\alpha$ 40 catalog through PhotoObjID.

To match these two catalogs, I chosed "RA"&"DEC" in MaNGA catalog, and "ra"&"dec" given by SDSS which had been supplemented to ALFALFA catalog. I did not use "RAdeg_OC" and "DECdeg_OC" in ALFALFA catalog because they are different with the SDSS ra & dec for the same PhotoObjID object. It could because that the SDSS catalog has changed the galaxy properties a little bit after DR7, ALFALFA might used the old value (DR7).