A search was
made using the Herschel Science Archive (HSA) for calibration observations of
OJ 287 made in standard photometric observing modes. A total of five
photometric observations were found, all taken with the SPIRE photometer
(Griffin 2010), each giving simultaneous photometry at 250, 350, and 500um. The
observations were made on four Operational Days (ODs) between 2010/04/20 and
2010/05/23.

We have
three sources of visible monitoring data for this period. Our first source is
the data in R only from the database of long-term monitoring maintained at the
Astronomical Observatory of the Jagiellonian University (Cracow, Poland). This
consists of 27 observations obtained from 19 nights of photometry in R, taken
between April 1 and May 28, 2010. Additionally, very high-quality data are
publicly available from the SMARTS telescope (Bonning et al.
2012ApJ...756...13B) in B, V, and R. 26 sets of BVR photometry are available
between April 1 and May 31, 2010.

The SMARTS
monitoring programme also obtains high-quality data in the J and K bands in the
near-infrared. Three nights have visible, but no infrared photometry, hence J
and K data are available on 23 nights in April and May 2010.

The 37GHz
observations were made with the 13.7m diameter Metsahovi radio telescope, which
is a radome-enclosed paraboloid antenna situated in Finland.