Key points are not available for this paper at this time.
As of 2012 Jan 21, the Pan-STARRS1 \\ (3\\\) Survey has observed the3/4 of the sky visible from Hawaii with a minimum of 2 and mean of 7. 6 in 5 filters, \\ (g\ ₁, r\ ₁, i\ ₁, z\ ₁, y\ ₁\\). Now at the end of the second of the mission, we are in a position to make an initial public of a portion of this unprecedented dataset. article describes the PS1 Photometric Ladder, Release 12. 01 is the first of a series of data releases to be generated as the coverage increases and the data analysis improves. The Ladder has rungs every hour in RA and at 4 intervals in. We will release updates with increased area coverage (more rungs) from the latest dataset until the PS1 survey and the re-reduction are completed. The currently released catalog photometry of \\ (\ 1000\\) objects per square degree in the of the ladder. Saturation occurs at \\ (g\ ₁, r\ ₁, i\ ₁ \ 13. 5; z\ ₁ \ 13. 0;\\) and \\ (y\ ₁ \ 12. 0\\). Photometry is provided for down to \\ (g\ ₁, r\ ₁, i\ ₁ \ 19. 1\\) in the AB system. data release depends on the rigid `Ubercal' photometric using only the photometric nights, with systematic of (8. 0, 7. 0, 9. 0, 10. 7, 12. 4) millimags in \\ ( (g\ ₁, r\ ₁, i\ ₁, z\ ₁, y\ ₁) \\). covered only with lower quality nights are also included, and been tied to the Ubercal solution via relative photometry; accuracy of the non-photometric regions is lower and be used with caution.
Magnier et al. (Wed,) studied this question.