A: There are no technical problems running hyperz with only 3 filters, but the results will be not very reliable. If you look at the probability functions probably you will find multiple solutions and extended ``plateaux''.
Q: Do I need near-IR or UV to compute photometric redshifts?
A: No, you don't need specifically near-IR or UV. But then the accuracy in several redshift zones, especially at , is going to be severely decreased. You can check Bolzonella et al. (2000) for a complete study.
Q: Do I need to have the photometry in all the filters for each object?
A: If your object was in the field but not detected, then you have to set its magnitude and choose between the different options that hyperz provides to deal with such case. If your object was not in the field, then set its magnitude and hyperz will not consider it in the computation.
Q: Do I need to cite you if I write a paper using this code?
A: It will be greatly appreciated to include a note saying that your results were obtained using the publicly available software hyperz, to refer to the paper Bolzonella M., Miralles J.-M. & Pelló R. (2000) and to include the http address where you downloaded it.
Q: I have an unsolvable problem, who can I contact?
A: You can contact either Micol at firstname.lastname@example.org, Roser at email@example.com or Joan-Marc at firstname.lastname@example.org.
Q: When are you going to release a new version?
A: If you want to be informed of new releases, bug fixes or improvements,
just email to any of us.