# Gray 2002: A Search for Periodic Emissions at the Wow Locale

> Robert H. Gray, Simon Ellingsen, 2002. 4 records on Mysteries Department cite it. The main long-duration follow-up before 2020.

Source: https://mysteriesdept.com/sources/SRC0CXZ4E260YRZ/a-search-for-periodic-emissions-at-the-wow-locale  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[Wow! signal](https://mysteriesdept.com/mysteries/wow-signal)Gray 2002

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# A Search for Periodic Emissions at the Wow Locale

Robert H. Gray, Simon Ellingsen, 2002. _The Astrophysical Journal_.

Fourteen hours of monitoring of the two positions with the 26-metre Mount Pleasant telescope near Hobart in 1998 and 1999, finding nothing, and constraints on a periodic source. ApJ 578, 967–971.

**Wow! signal** Articledoi: **[10.1086/342646](https://doi.org/10.1086/342646)** Checked against the original0

## What it's used for here

The main long-duration follow-up before 2020.

## Cited by on this site 4 records

[The source does not repeat on any timescale sampled so far (seconds to decades).](https://mysteriesdept.com/mysteries/wow-signal/answers/ANS0CXZ4X6J08DT/the-source-does-not-repeat-on-any-timescale-sampled-so-far)

Answer

ANS

[Gray and Ellingsen monitor the locale for 14 hours from Hobart](https://mysteriesdept.com/mysteries/wow-signal/events/EVT0CXZ4MN429SQ/gray-and-ellingsen-monitor-the-locale-for-14-hours-from)

EVT

[The Wow! signal](https://mysteriesdept.com/mysteries/wow-signal)

The mystery article

MYS

[Has the signal ever repeated, and what would a search need to find out?](https://mysteriesdept.com/mysteries/wow-signal/questions/QST0CXZ4PKM6DRS/has-the-signal-ever-repeated-and-what-would-a-search-need-to)

Question

QST

## Cite it

```
Gray, R. H., & Ellingsen, S. (2002). A Search for Periodic Emissions at the Wow Locale. The Astrophysical Journal. https://doi.org/10.1086/342646
```

[Read it free at doi.org](https://doi.org/10.1086/342646)

Key

**SRC** 0CXZ4E260YRZ

Kind

Journal article

Rights

The publisher's

Kept

27 Oct 2026, for editors

Checked

Against the published article

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS.

[CSL-JSON](https://mysteriesdept.com/sources/SRC0CXZ4E260YRZ/a-search-for-periodic-emissions-at-the-wow-locale/csl.json)