... Given a flux at 0.9?m of 2.3x10 -7 Jy, estimate the I magnitude. 2.3x10 -7 Jy is less than 2.3x10 -1 Jy by three powers of a hundred, or 15 magnitudes. ...
... Flux measurements were routinely reported in the UBV magnitude system, and to attempt to integrate IR astronomy into this system, Johnson (Ap.J., 134 , 69) defined the first IR magnitude system. ...
... The integrated magnitude limit gives the total magnitude from all stars (or galaxies, or diffuse objects) of spectral type O which can appear in the MAMA field of view. ...
... uncertainty in distance, +dm, -dm (the corresponding uncertainty in absolute magnitude), name As noted above, all distances are based on trig parallax measurements, primarily Hipparcos or USNO; RI magnitudes are on Cousins system; JHK on the CIT or 2MASS ...
... A. Even if you haven't asked for magnitudes, synphot may internally convert to magnitude if you have specified a renormalization in magnitudes, or if you have specified one of the non-HST bandpasses that are defined in magnitudes (eg, Johnson V). ...
... The apparent magnitude of the host galaxies varies with distance as expected if the absolute magnitudes are approximately the same, with a spread of ±1 mag, out to redshift z ~0.5. ...