ERRATUM: "GAMMA RAY STUDIES OF BLAZARS: SYNCHRO-COMPTON ANALYSIS OF FLAT SPECTRUM RADIO QUASARS" (2009, ApJ, 692, 32)

The photo-absorption due to γ-rays interacting with broad line region (BLR) photons was calculated incorrectly in Figures 11 and 12 of the published version of this article. Corrected figures can be found in Figures 1 and 2. We are grateful to Dahai Yan (Yunnan University) for bringing this error to our attention. Absorption effects from the BLR will clearly have less of an observable effect than we concluded, particularly for the ξ = −2 case. However, for the ξ = 0 case, a spectral break is still clearly seen. All our other conclusions remain unchanged.

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We also point out a few errors which do not affect our results, as the correct expressions were used in our calculations. Equation (88) of the published article should read

$$\begin{eqnarray*} &&\frac{u_*(\epsilon _{*})}{4\pi } = u_{bb}(\epsilon _{*},\Omega _{*}) = \frac{2m_e c^2}{\lambda _C^3} \frac{ \epsilon _{*}^3}{ \exp (\epsilon _{*}/\Theta) - 1 }\, \end{eqnarray*}$$

i.e., there was an extra factor of c in the numerator.

The equation in the text just above Equation (93) should read

$$\begin{eqnarray*} &&\dot{n}(\epsilon _{*}; \vec{R}) = \dot{N}_{{\rm ph}}(\epsilon _{*})\sigma _{\rm T}n_e(R) / (4\pi R^2), \end{eqnarray*}$$

i.e., there was an extra factor of c in the denominator.

Equation (103) should read

$$\begin{eqnarray*} f_\epsilon ^{T,{\rm iso}} &=& \frac{c\pi r_e^2 \delta _{\rm D}^3 u_{*0}}{4\pi d_L^2} \left(\frac{\epsilon _s}{\epsilon _{*}}\right)^2 \int ^1_{\max (-1,1-2\epsilon _s/\epsilon _{*})} d\mu _* \nonumber \\ &&\times \int ^{\infty }_{\sqrt{ \epsilon _s/2\epsilon _{*}(1-\mu _*)}} d\gamma \ \gamma ^2\ N^\prime _e(\gamma /\delta _{\rm D})\, \end{eqnarray*}$$

i.e., δ_D should be raised to the power 3 rather than 3 + p.

In Equation (104), the conditional should read

$$\begin{eqnarray*} &&\epsilon _{*}\lesssim \epsilon _s \ll 4\epsilon _*\big(\delta _{\rm D}^2\gamma ^{\prime }_1\big)^2, \end{eqnarray*}$$

and in Equation (105) the conditional should read

$$\begin{eqnarray*} &&4\epsilon _{*}\big(\delta _{\rm D}^2\gamma ^{\prime }_1\big)^2 \lesssim \epsilon _s \ll 4\epsilon _{*}\big(\delta _{\rm D}^2\gamma ^{\prime }_2\big)^2. \end{eqnarray*}$$