Mumbai/Ahmedabad: Astral Limited (Astral; erstwhile Astral Poly Technik Ltd, Astral; part of the Astral group) long-term bank facilities has been upgraded to ‘CRISIL AA/Stable’ from ‘CRISIL AA-/Positive’ while reaffirmed its short term rating and commercial paper at ‘CRISIL A1+’ by country’s leading rating agency, CRISIL.