Jay Edward says "The Catechism of the Catholic Church is part of the Magisterium"

Indeed.

From: http://tinyurl.com/CCC2ndEd

'... how fitting was the request submitted to me in 1985 by the Extraordinary Assembly of the Synod of Bishops that a catechism or compendium of all Catholic doctrine regarding faith and morals be composed. Drawn up by the special Commission of Cardinals and Bishops established in 1986, the Catechism was approved and promulgated by me in the aforementioned Apostolic Constitution"

"... the task of composing the Catechism, begun in 1986, is brought to a close and the desire of the aforementioned Extraordinary Synod of Bishops is happily fulfilled. The Church now has at her disposal this new, authoritative exposition of the one and perennial apostolic faith, and it will serve as a “valid and legitimate instrument for ecclesial communion” and as a “sure norm for teaching the faith,” ...'

John Paul II
August 15, 19978