Paper Citation Record · LEDGER

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves

As of 23 July 2026, this Paper Citation Record lists 48 of 48 outbound references and 0 inbound Pith citation observations for arXiv:1907.03757.

A citation records a reference. It does not transfer a finding from one paper to another.

pith.paper-citation-record.v1
1907.03757 v1

Coverage vector

measured 48 of 48 reference resolution

Typed states for the displayed outbound observations.

Source: paper_references, paper_reference_links, observed 2026-05-25T00:54:56.610400Z

measured 48 of 48 standing notices

One-hop event checks from named stored sources.

Source: scholarly_work_events, retraction_status_cache, observed 2026-07-20T06:30:07.809122+00:00

measured 0 of 0 inbound itemization

Pith citing papers itemized under the disclosed page cap.

Source: paper_references, paper_reference_links

measured 0 of 1 external citation measurements

A source-named dated measurement, never combined with another source.

Source: cited_works

Reference resolution

48 of 48 outbound references displayed

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External citation measurements

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Outbound references

Observation 2c1a4a36-f087-4ffc-b155-eae0d0bf7ef8 · outbound

This paper cites M., Chary, R.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves M., Chary, R

Reference 1

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.801986Z

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Observation 2cae0736-b12a-46b3-9d0d-c59187188ff4 · outbound

This paper cites 2016, ApJ, 821, 13.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2016, ApJ, 821, 13

Reference 2

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.780011Z

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Observation 975dd918-48a7-45d6-b88d-8409a4d97cb5 · outbound

This paper cites T., Brazier, A., et al.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves T., Brazier, A., et al

Reference 3

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.874659Z

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Observation cab5906a-780f-44f7-8fa0-de71b76b6d3c · outbound

This paper cites C., Blandford, R.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves C., Blandford, R

Reference 4

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.867451Z

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Observation c9dec088-8765-4bb9-85cb-76268a3822a4 · outbound

This paper cites 2008, Galactic Dynamics: Second Edition (Princeton University Press).

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2008, Galactic Dynamics: Second Edition (Princeton University Press)

Reference 5

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.842169Z

Source-reported events for the cited work

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Observation 58ad669e-5f21-4b0c-910c-8c781dfaefe5 · outbound

This paper cites 2018, MNRAS, 477.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2018, MNRAS, 477

Reference 6

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.811743Z

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Observation b08b9650-2373-40d4-aadc-3fa20867c6a7 · outbound

This paper cites The Astrophysics of Nanohertz Gravitational Waves.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves The Astrophysics of Nanohertz Gravitational Waves

Reference 7

Resolution: metadata mismatch; local_arxiv, observed 2026-05-25T00:55:09.456742Z

Source-reported events for the cited work

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Observation f6857dd9-decd-4a09-8f21-79484d947a79 · outbound

This paper cites J., Hickox, R.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves J., Hickox, R

Reference 8

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.892705Z

Source-reported events for the cited work

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Observation 6c18e5bb-323c-43e9-b877-0828709e7443 · outbound

This paper cites 1993, MNRAS, 265, 250.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 1993, MNRAS, 265, 250

Reference 9

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.937067Z

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Observation 9e9300e3-48db-480c-ae46-277d70055eb5 · outbound

This paper cites The Unique Blazar OJ 287 and its Massive Binary Black Hole Central Engine.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves The Unique Blazar OJ 287 and its Massive Binary Black Hole Central Engine

Reference 10

Resolution: metadata mismatch; local_arxiv, observed 2026-05-25T00:55:09.469781Z

Source-reported events for the cited work

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Observation 0ef1df32-f225-40a3-b3e4-5181986811ee · outbound

This paper cites 2011, Nature, 477, 431.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2011, Nature, 477, 431

Reference 11

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.852486Z

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Observation 38a685df-3f07-4a18-ba75-20d21acbf1cb · outbound

This paper cites M., Storchi-Bergmann, T., et al.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves M., Storchi-Bergmann, T., et al

Reference 12

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.933678Z

Source-reported events for the cited work

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Observation 0f919818-1e13-48bc-b185-97c4da2ec329 · outbound

This paper cites D., et al.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves D., et al

Reference 13

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.924620Z

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Observation b002dd4c-861d-4d70-9c34-92b7207d01a5 · outbound

This paper cites 2000, ApJ, 532, L29.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2000, ApJ, 532, L29

Reference 14

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.782507Z

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Observation 4395ac18-f92b-4ced-976b-e03d8d611fd5 · outbound

This paper cites D., Alexander, D.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves D., Alexander, D

Reference 15

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.940666Z

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Observation 6e77e76d-dc23-40a2-9d28-7f44fc9a476b · outbound

This paper cites A., Kocevski, D.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves A., Kocevski, D

Reference 16

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.785507Z

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Observation d9342ca5-98c1-431c-8ac4-562a1d390a19 · outbound

This paper cites M., Alexander, D.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves M., Alexander, D

Reference 17

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.814610Z

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Observation a0ccfd66-7912-46fd-9d78-91bdec92ccfa · outbound

This paper cites C., Mullaney, J.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves C., Mullaney, J

Reference 18

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.907088Z

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Observation 66402e02-8fa6-4221-9e2b-5597f0cf5d87 · outbound

This paper cites F., Richards, G.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves F., Richards, G

Reference 19

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.896504Z

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Observation 29ba53f2-9d60-4897-9e40-9f47aa036c53 · outbound

This paper cites an unresolved cited work.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Unresolved cited work

Reference 20

Resolution: unresolved; raw_fallback, observed 2026-05-25T00:55:09.920633Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 2c8b3ced-9e26-4f61-9267-4e4c37a1cc4f · outbound

This paper cites Z., Blecha, L., Hernquist, L., Sesana, A., & Taylor, S.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Z., Blecha, L., Hernquist, L., Sesana, A., & Taylor, S

Reference 21

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.856477Z

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Observation fcbb452e-9cac-429a-b0f4-9d4c32e2707d · outbound

This paper cites J., Blecha, L., Bernhard, P., et al.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves J., Blecha, L., Bernhard, P., et al

Reference 22

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.889230Z

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Observation 82c328fa-aba8-4ff6-841b-a0a09d17f1ce · outbound

This paper cites D., Alexander, D.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves D., Alexander, D

Reference 23

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.827658Z

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Observation 6945c617-3218-4783-b9ef-a8c550a566a9 · outbound

This paper cites 2013, ApJ, 762, 110.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2013, ApJ, 762, 110

Reference 24

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.849047Z

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Observation f27fddb1-de3d-4cf5-b8a7-06f361eb08d3 · outbound

This paper cites E., Shen, Y ., & Strauss, M.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves E., Shen, Y ., & Strauss, M

Reference 25

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.899657Z

Source-reported events for the cited work

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Observation 7aef0046-15ac-43d0-a8b8-c64342adf2ea · outbound

This paper cites 2004, MNRAS, 351, 169.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2004, MNRAS, 351, 169

Reference 26

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.808631Z

Source-reported events for the cited work

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Observation 83fdd6e2-7bdb-438b-9f27-8dca2e6fe957 · outbound

This paper cites 2008, MNRAS, 388.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2008, MNRAS, 388

Reference 27

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.881691Z

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Observation 200c30dd-f69d-4e48-8cf9-728663defbaa · outbound

This paper cites an unresolved cited work.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Unresolved cited work

Reference 28

Resolution: unresolved; raw_fallback, observed 2026-05-25T00:55:09.788497Z

Source-reported events for the cited work

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Observation 14c79578-7e05-4e4b-8c7c-ff74c7a49783 · outbound

This paper cites an unresolved cited work.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Unresolved cited work

Reference 29

Resolution: unresolved; raw_fallback, observed 2026-05-25T00:55:09.831202Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 2ab930e2-a5f0-4357-b86b-7ca4d65f2386 · outbound

This paper cites R., Alexander, D.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves R., Alexander, D

Reference 30

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.927724Z

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Observation b78249b7-5358-490c-9be9-581ea99adcd3 · outbound

This paper cites Y ., Ho, L.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Y ., Ho, L

Reference 31

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.903558Z

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Observation 9c9d9ebf-b916-4125-9c62-06cda86f2411 · outbound

This paper cites A Practical Theorem on Gravitational Wave Backgrounds.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves A Practical Theorem on Gravitational Wave Backgrounds

Reference 32

Resolution: verified exact; local_arxiv, observed 2026-05-25T00:55:09.463218Z

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Observation 5147ebc9-3172-40e3-b6a8-d44e1a39468e · outbound

This paper cites an unresolved cited work.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Unresolved cited work

Reference 33

Resolution: unresolved; raw_fallback, observed 2026-05-25T00:55:09.805086Z

Source-reported events for the cited work

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Observation bb4797b4-84d8-4ac6-99ba-8bf473cd9638 · outbound

This paper cites B., Zavala, R.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves B., Zavala, R

Reference 34

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.885207Z

Source-reported events for the cited work

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Observation d0fc2150-44f7-4a08-8f61-de4e39b40d35 · outbound

This paper cites P., & Stone, N.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves P., & Stone, N

Reference 35

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.795026Z

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Observation 1834a2fc-be60-497e-83b9-ca3ec23b6d9e · outbound

This paper cites J., & McWilliams, S.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves J., & McWilliams, S

Reference 36

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.871072Z

Source-reported events for the cited work

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Observation 19a2a4f1-db9a-47fc-a9c2-0542938f38ff · outbound

This paper cites an unresolved cited work.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Unresolved cited work

Reference 37

Resolution: unresolved; raw_fallback, observed 2026-05-25T00:55:09.863709Z

Source-reported events for the cited work

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Observation 9368e750-9974-4b99-ac20-375f13b9f685 · outbound

This paper cites an unresolved cited work.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Unresolved cited work

Reference 38

Resolution: unresolved; raw_fallback, observed 2026-05-25T00:55:09.820717Z

Source-reported events for the cited work

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Observation 65d60207-b1a0-4c4b-befb-10a9ab8595a9 · outbound

This paper cites an unresolved cited work.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves Unresolved cited work

Reference 39

Resolution: unresolved; raw_fallback, observed 2026-05-25T00:55:09.791520Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 479bf786-33e6-490a-8cd7-c345c50b744a · outbound

This paper cites K., et al.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves K., et al

Reference 40

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.798866Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 72513000-9114-4e3c-998d-571fd5d43f49 · outbound

This paper cites 2005, ApJ, 620, L79.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2005, ApJ, 620, L79

Reference 41

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.824464Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 32667adb-b213-4d43-840f-29975357c35f · outbound

This paper cites E., & Zakamska, N.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves E., & Zakamska, N

Reference 42

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.878115Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 1d2b9907-9ab4-4357-b1a6-0c6fead54124 · outbound

This paper cites R., Vallisneri, M., Ellis, J.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves R., Vallisneri, M., Ellis, J

Reference 43

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.930701Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 6c1b2253-c7a8-46ad-b0cb-4ec1067019f8 · outbound

This paper cites 2014, MNRAS, 437, 32.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2014, MNRAS, 437, 32

Reference 44

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.817690Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation c1731288-33b0-4e8d-9af9-a8641facb154 · outbound

This paper cites 2009, ApJL, 705, L20.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2009, ApJL, 705, L20

Reference 45

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.845607Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 9dd24865-8b4d-47f4-8c5e-65e44924d3b3 · outbound

This paper cites G., Adelman, J., Anderson, John E., J., et al.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves G., Adelman, J., Anderson, John E., J., et al

Reference 46

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.838390Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation de611a4e-7cbe-4696-8243-8071bd59583e · outbound

This paper cites 2003, ApJ, 599.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2003, ApJ, 599

Reference 47

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.834626Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-07-20T06:30:07.809122+00:00.

Observation 2fcca35c-6308-4560-b246-89ce9c2b3e1a · outbound

This paper cites 2019, MNRAS, 482.

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves 2019, MNRAS, 482

Reference 48

Resolution: verified fuzzy; raw_fallback, observed 2026-05-25T00:55:09.859882Z

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