Table 1: Observation Log.
Target Instrument Date Filtera Detectorb No. interferograms Calibratorsd
  and configuration [UT]   and modec target/calibrator  

$\theta ^1$Ori C		 BTA 6 m/Speckle 1997.784 H P/DIT = 150 ms 519/641 $\theta ^1$Ori D
$\theta ^1$Ori C BTA 6 m/Speckle 1998.838 K' H/DIT = 120 ms 438/265 $\theta ^1$Ori D
$\theta ^1$Ori C BTA 6 m/Speckle 1999.737 J H/DIT = 100 ms 516/244 $\theta ^1$Ori D
$\theta ^1$Ori C BTA 6 m/Speckle 1999.8189 G' S/DIT = 5 ms 500/- -
$\theta ^1$Ori C BTA 6 m/Speckle 2000.8734 V' S/DIT = 5 ms 1 000/- -
$\theta ^1$Ori C BTA 6 m/Speckle 2001.184 J H/DIT = 80 ms 684/1 523 $\theta ^1$Ori D
$\theta ^1$Ori C BTA 6 m/Speckle 2003.8 J H/DIT = 160 ms 312/424 $\theta ^1$Ori D
$\theta ^1$Ori C BTA 6 m/Speckle 2003.9254 V' S/DIT = 2.5 ms 1 500/- -
$\theta ^1$Ori C BTA 6 m/Speckle 2003.928 V' S/DIT = 2.5 ms 2 000/- -
$\theta ^1$Ori C BTA 6 m/Speckle 2004.8216 V' S/DIT = 5 ms 2 000/- -
$\theta ^1$Ori C BTA 6 m/Speckle 2006.8 V', R' - - -
$\theta ^1$Ori C IOTA A35-B15-C0 2005 Dec. 04 H 1L7R, 2L7R 11 400/8 050 HD 14129, HD 36134, HD 34137,
            HD 50281, HD 63838
$\theta ^1$Ori C IOTA A35-B15-C10 2005 Dec. 02 H 2L7R, 4L7R 4 400/4 950 HD 34137, HD 50281, HD 63838
$\theta ^1$Ori C IOTA A35-B15-C10 2005 Dec. 03 H 2L7R 4 600/2 450 HD 28322
$\theta ^1$Ori C IOTA A35-B15-C15 2005 Dec. 01 H 2L7R, 4L7R 7 250/5 000 HD 20791, HD 34137, HD 36134
$\theta ^1$Ori C IOTA A25-B15-C0 2005 Dec. 06 H 2L7R, 4L7R 5 250/4 875 HD 28322, HD 34137, HD 36134,
            HD 74794
$\theta ^1$Ori D IOTA A35-B15-C0 2005 Dec. 04 H 2L7R 800/2 800 HD 14129, HD 36134, HD 34137,
            HD 50281, HD 63838
$\theta ^1$Ori D IOTA A25-B15-C0 2005 Dec. 06 H 2L7R, 4L7R 1 800/4 875 HD 28322, HD 34137, HD 36134,
            HD 74794

a Filter central wavelength and bandwidth, in nm ( $\lambda_{c}$/ $\Delta\lambda$) - V': 545/30; G': 610/20; R': 800/60; J: 1 239/138; H: 1 613/304; K': 2 115/214.
b P: PICNIC detector, H: HAWAII array, S: Multialkali S25 intensifier photocathode
c For the IOTA measurements, we used different detector read modes to adapt to the changing atmospheric conditions. The two numbers in the given 4-digit code denote the value of the loop and read parameter (Pedretti et al. 2004) of the PICNIC camera. Since data taken in different readout modes is calibrated independently, the scattering between the data sets also resembles the typical calibration errors (see Fig. 4).
d The dash symbol in the calibrator column indicates speckle measurements for which no calibrator was observed.

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