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The important studies of Peebles, and Bond and Efstathiou have led to theformula C_l = const/[l(l +1)] aimed at describing the lower order multipoles ofthe CMBR temperature variations caused by density perturbations with the flatspectrum. Clearly, this formula requires amendments, as it predicts aninfinitely large monopole C_0, and a dipole moment C_1 only 6/2 times largerthan the quadrupole C_2, both predictions in conflict with observations. Werestore the terms omitted in the course of the derivation of this formula, andarrive at a new expression. According to the corrected formula, the monopolemoment is finite and small, while the dipole moment is sensitive toshort-wavelength perturbations, and numerically much larger than thequadrupole, as one would expect on physical grounds. At the same time, thefunction l(l +1)C_l deviates from a horizontal line and grows with l, for l\geq 2. We show that the inclusion of the modulating (transfer) functionterminates the growth and forms the first peak, recently observed. We fit thetheoretical curves to the position and height of the first peak, as well as tothe observed dipole, varying three parameters: red-shift at decoupling,red-shift at matter-radiation equality, and slope of the primordial spectrum.It appears that there is always a deficit, as compared with the COBEobservations, at small multipoles, l \sim 10. We demonstrate that a reasonableand theoretically expected amount of gravitational waves bridges this gap atsmall multipoles, leaving the other fits as good as before. We show that theobservationally acceptable models permit somewhat `blue' primordial spectra.This allows one to avoid the infra-red divergence of cosmologicalperturbations, which is otherwise present.Comment: prints to 25 pages including 14 figures, several additional sentences  on interpretation, new references, to appear in Int. Journ. Mod. Physics

ON THE CONTRIBUTION OF DENSITY PERTURBATIONS AND GRAVITATIONAL WAVES TO THE LOWER ORDER MULTIPOLES OF THE COSMIC MICROWAVE BACKGROUND RADIATION