Okay, I need to create a Wikipedia-style document about the gravitational wave event GW150914 under the categories of Science > Astronomy > Gravitational Wave Events. Let me start by recalling what I know about GW150914.

First, the title should be H1, so "GW150914" as specified. The introduction needs to give an overview. I remember that this was the first direct detection of gravitational waves by LIGO. It occurred on September 14, 2015, and was caused by two black holes merging. That's a key point.

Next, the structure: sections with H2 and H3. Maybe start with "Introduction" as an H2. Then under that, perhaps "Discovery Context" as H3. But wait, the user wants multiple sections. Let me think of possible sections.

Possible sections could be: - Introduction - Discovery Details (H2) - Detection Date and Location (H3) - Source Characteristics (H3) - Scientific Significance (H2) - Confirmation of General Relativity (H3) - Implications for Black Hole Populations (H3) - Technical Aspects (H2) - LIGO Instruments (H3) - Data Analysis Methods (H3) - Follow-up Observations (H2) - Electromagnetic Counterparts (H3) - Multi-messenger Astronomy (H3) - Legacy and Impact (H2) - Recognition and Awards (H3) - Future Research Directions (H3) - References and Further Reading (H2)

Wait, the user mentioned "필요시 참고 자료나 관련 문서 섹션" so I need a references section. Also, make sure each section has enough detail. Let me check if all sections are covered.

For the introduction, mention that it's the first direct observation, confirming Einstein's prediction. Then in discovery details, include date, location (Hanford and Livingston), source (binary black hole merger). For scientific significance, talk about testing general relativity, black hole populations. Technical aspects: LIGO detectors' sensitivity, data analysis techniques like matched filtering. Follow-up observations: no electromagnetic counterparts found, but it's a milestone for multi-messenger astronomy. Legacy: Nobel Prize in Physics 2017, future projects.

Need to ensure that technical terms are explained. For example, "matched filtering" should be briefly defined. Also, mention the masses of the black holes (36 and 29 solar masses), resulting in a 62-solar-mass black hole. The energy released as gravitational waves is equivalent to about three solar masses.

Check for accuracy: GW150914 was indeed detected on September 14, 2015, by LIGO. The event was named after the date (GW = Gravitational Wave, 150914). The black holes merged into a larger one, and the signal was observed in both detectors.

Also, mention that this discovery opened a new era in astronomy, allowing observation of cosmic events through gravitational waves. Maybe include some statistics like the distance (about 1.3 billion light-years) and the frequency range (tens to hundreds of Hz).

Need to avoid markdown formatting except for headers and lists. Use H2 for main sections, H3 for subsections. Make sure each section is detailed enough to meet the 800-character minimum. Let me check the length as I go.

Also, include references like the LIGO collaboration paper, maybe a link to their website or the Nobel Prize announcement. But since it's a wiki-style document, perhaps just cite the sources in the references section without actual links.

Make sure the language is clear and professional, avoiding overly technical jargon but still accurate. For example, explain what gravitational waves are briefly in the introduction.

Double-check all facts: dates, masses, detectors involved, significance. Avoid any errors that could mislead readers.