RESUMO
Nine point sources appeared within half an hour on a region within [Formula: see text] 10 arcmin of a red-sensitive photographic plate taken in April 1950 as part of the historic Palomar Sky Survey. All nine sources are absent on both previous and later photographic images, and absent in modern surveys with CCD detectors which go several magnitudes deeper. We present deep CCD images with the 10.4-m Gran Telescopio Canarias, reaching brightness [Formula: see text] mag, that reveal possible optical counterparts, although these counterparts could equally well be just chance projections. The incidence of transients in the investigated photographic plate is far higher than expected from known detection rates of optical counterparts to e.g. flaring dwarf stars, Fast Radio Bursts, Gamma Ray Bursts or microlensing events. One possible explanation is that the plates have been subjected to an unknown type of contamination producing mainly point sources with of varying intensities along with some mechanism of concentration within a radius of [Formula: see text] 10 arcmin on the plate. If contamination as an explanation can be fully excluded, another possibility is fast (t [Formula: see text] s) solar reflections from objects near geosynchronous orbits. An alternative route to confirm the latter scenario is by looking for images from the First Palomar Sky Survey where multiple transients follow a line.
RESUMO
La dacriocistorrinostomía es una modalidad terapéutica en niños con dacrioestenosis congénita o adquirida acompañada de dacriocistitis crónica donde la terapia médica, sondaje y la intubación no han tenido éxito. Se reporta la experiencia con 10 dacriocistorrinostomías en niños acompañada con intubación con tubos de polietileno o silicona. A pesar de que la dacriocistorrinostomía poco usada en niños en este trabajo se enfatizan las indicaciones para realizarla en estos pacientes