Paper Citation Record · LEDGER

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope

As of 21 August 2026, this Paper Citation Record lists 78 of 78 outbound references and 5 inbound Pith citation observations for arXiv:1908.11794.

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

pith.paper-citation-record.v1
1908.11794 v1

Coverage vector

measured 78 of 78 reference resolution

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Pith citing papers itemized under the disclosed page cap.

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Source: arxiv_reference, observed 2026-05-11T06:46:44.579350Z

Reference resolution

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External citation measurements

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Outbound references

Observation 0b13a98a-d84e-4691-9608-f2f665864bd7 · outbound

This paper cites an unresolved cited work.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 1

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This paper cites Here we denote pµ as the 4-momentum of photons.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Here we denote pµ as the 4-momentum of photons

Reference 2

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Observation 1fbb936e-de75-478f-9fa5-8c821351956e · outbound

This paper cites The 4-velocity of disk element is given by Eq.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope The 4-velocity of disk element is given by Eq

Reference 3

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This paper cites Using the sine theorem of spherical triangle in ∆ Myy′, we obtain sin ’Myy′/ sin( ¯My′/r) = sin ’y′My/ sin(ˆyy′/r).

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Using the sine theorem of spherical triangle in ∆ Myy′, we obtain sin ’Myy′/ sin( ¯My′/r) = sin ’y′My/ sin(ˆyy′/r)

Reference 4

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Observation 1a5c01fc-e05a-4651-9715-a645b04e35d8 · outbound

This paper cites Akiyama et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Akiyama et al

Reference 5

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Observation 235a40be-a5aa-4ff2-94b2-18fe262c80f2 · outbound

This paper cites Akiyama et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Akiyama et al

Reference 6

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 7

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This paper cites Akiyama et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Akiyama et al

Reference 8

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This paper cites Akiyama et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Akiyama et al

Reference 9

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Observation d8d1705e-1ad6-4cf6-8f49-e41922f79ba9 · outbound

This paper cites Akiyama et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Akiyama et al

Reference 10

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Observation 3c30cce9-ec0b-413d-89ec-32daec6cf177 · outbound

This paper cites Akiyama et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Akiyama et al

Reference 11

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Observation 98ac3eae-fba7-4409-a6b6-3aca7cb35313 · outbound

This paper cites Falcke, F.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Falcke, F

Reference 12

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Observation 941215ce-24c6-4bbb-9839-f2560fa249be · outbound

This paper cites Astrophys.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Astrophys

Reference 13

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 14

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 15

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 16

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 17

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Observation 9b35f4a8-4433-4490-8913-b9331225f3a9 · outbound

This paper cites Luminet, Astron.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Luminet, Astron

Reference 18

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 19

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Observation 1fbe592a-6ace-4ce4-8357-771ef8bc833d · outbound

This paper cites Johannsen, C.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Johannsen, C

Reference 20

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Observation f7fa8fbd-4756-4e25-88d2-2c78ad868174 · outbound

This paper cites Roelofs et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Roelofs et al

Reference 21

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 22

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Observation 364a28ba-4fb2-4831-aeb8-abc8c24000ff · outbound

This paper cites Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope

Reference 23

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Observation 26246968-f268-4d56-838e-9fdf0c243c8f · outbound

This paper cites Porth et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Porth et al

Reference 24

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Observation bf2b7b59-db27-4bed-95c2-478b976b0ee9 · outbound

This paper cites Constrained transport and adaptive mesh refinement in the Black Hole Accretion Code.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Constrained transport and adaptive mesh refinement in the Black Hole Accretion Code

Reference 25

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Observation 033f678f-ce1a-4c65-b982-4c89944b51c9 · outbound

This paper cites Dexter and E.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Dexter and E

Reference 26

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Observation 4ff10af1-1150-4aac-9f4b-01143d0ec95a · outbound

This paper cites Shadow of rotating charged black hole with Weyl corrections.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Shadow of rotating charged black hole with Weyl corrections

Reference 27

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Observation 1623b42a-8aee-4fa1-9cc0-983039d32450 · outbound

This paper cites Glampedakis and S.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Glampedakis and S

Reference 28

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Observation 3d315bf5-176e-4c96-b0bb-99b709c5792a · outbound

This paper cites Mizuno, Z.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Mizuno, Z

Reference 29

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Observation c5a54770-562a-4913-87d5-5215eb8b75ed · outbound

This paper cites Rezzolla and A.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Rezzolla and A

Reference 30

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Observation 7832c995-6857-4504-8607-23ac55b5ff6b · outbound

This paper cites Bronzwaer, J.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Bronzwaer, J

Reference 31

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Observation 0ef3d5e6-2cd3-46e7-b3bc-3cc6990e15ee · outbound

This paper cites Gyulchev, P.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Gyulchev, P

Reference 32

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Observation 571aceeb-cdea-4141-8453-2eb09a768a64 · outbound

This paper cites Clifton, P.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Clifton, P

Reference 33

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 34

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 35

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 36

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 37

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Observation 88cf768e-72c2-44a2-89f6-0cb2d7352055 · outbound

This paper cites Masanori et al.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Masanori et al

Reference 38

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Observation 2ab438fa-2405-4f29-a05b-6bbb8149cb84 · outbound

This paper cites Takahashi, K.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Takahashi, K

Reference 39

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Observation 84c64f8a-3a69-4987-b490-6655b14de168 · outbound

This paper cites Testing the rotational nature of the supermassive object M87* from the circularity and size of its first image.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Testing the rotational nature of the supermassive object M87* from the circularity and size of its first image

Reference 40

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Observation 992bd7e6-2fb2-4229-b9d7-5d60cdabc5b9 · outbound

This paper cites Measurement of the spin of the M87 black hole from its observed twisted light.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Measurement of the spin of the M87 black hole from its observed twisted light

Reference 41

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Observation 0407fcb3-70da-4faa-96f5-5be86150156e · outbound

This paper cites Li, Y.-F.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Li, Y.-F

Reference 42

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Observation 33529bde-3660-498f-8ab1-53f822ded072 · outbound

This paper cites Kawashima, M.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Kawashima, M

Reference 43

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Observation a0861e6b-31fc-410e-ba3a-80bb1db35e5e · outbound

This paper cites Nemmen, Astrophys.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Nemmen, Astrophys

Reference 44

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Observation ead9e795-d43d-4d6f-82de-0a5666ae90fb · outbound

This paper cites M87 black hole mass and spin estimate through the position of the jet boundary shape break.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope M87 black hole mass and spin estimate through the position of the jet boundary shape break

Reference 45

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Observation 8dc4330b-d399-4961-8806-c693a79551c6 · outbound

This paper cites Yunes and L.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Yunes and L

Reference 46

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Observation 67b8c5a7-55a1-403d-842c-2fe26e07b7fd · outbound

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 47

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Observation 3990a897-7278-49eb-b2e1-16db8e4aeef6 · outbound

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 48

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Observation 93c791c3-d83a-4d4e-a230-e79255098914 · outbound

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 49

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:31.078735Z

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Observation 2ad1c6c8-27b4-474b-8beb-15a05fb6b34f · outbound

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 50

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:31.065626Z

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Observation 113cdda2-0d1e-45a5-a840-fd46ad936265 · outbound

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 51

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:31.053647Z

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Observation 341ca3f1-b9f3-46ee-8596-cc911f6cccc7 · outbound

This paper cites Punsly, Astrophys.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Punsly, Astrophys

Reference 52

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 53

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Observation bded7163-b10a-4044-abd6-248ba0ef0907 · outbound

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 54

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:31.014073Z

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Observation ef825a28-18f8-4c31-8c26-99389a9ebf5a · outbound

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Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 55

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:31.000608Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 00ab5ed5-43a8-4bd6-98cd-c59877c5ab93 · outbound

This paper cites C´ ardenas-Avenda˜ no, J.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope C´ ardenas-Avenda˜ no, J

Reference 56

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.987609Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 886ee743-91a9-43cf-9242-d1e63030c6b7 · outbound

This paper cites Fukue and T.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Fukue and T

Reference 57

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.975488Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 9a601a4e-d0fb-4fe6-af51-fabf463025a9 · outbound

This paper cites Horne and T.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Horne and T

Reference 58

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.963769Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 87a79832-78a0-43cb-9222-20c94028bf73 · outbound

This paper cites an unresolved cited work.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 59

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:30.951410Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 56d1fbba-46e7-4b65-8ca2-7a6c0e1dcaef · outbound

This paper cites Gebhardt and J.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Gebhardt and J

Reference 60

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.938204Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 4c53d592-49de-4160-a573-01cafa413d48 · outbound

This paper cites Gebhardt, J.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Gebhardt, J

Reference 61

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.925433Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 997da4b6-3b84-4d52-b409-d3463bf494f8 · outbound

This paper cites an unresolved cited work.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 62

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:30.911738Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 757fc694-edf5-4d13-b466-4fb6003d608c · outbound

This paper cites Macchetto, A.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Macchetto, A

Reference 63

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.899837Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 8281b6ef-d05c-4f10-b93f-70b5d26ef37c · outbound

This paper cites an unresolved cited work.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 64

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:30.888118Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 05379ba3-3df1-4266-b311-ea325a9a0160 · outbound

This paper cites Cosmological Tests of Gravity.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Cosmological Tests of Gravity

Reference 65

Resolution: unresolved; no resolver link, observed 2026-08-14T10:14:30.559836Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation ac06814d-725b-4c9b-a2a1-382a0d21aec4 · outbound

This paper cites De Felice and S.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope De Felice and S

Reference 66

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.875629Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation d8a629ff-9228-45a9-b7ee-829d3bdc4267 · outbound

This paper cites Capozziello, A.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Capozziello, A

Reference 67

Resolution: unresolved; no resolver link, observed 2026-08-14T10:14:30.567929Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation 383e3359-f815-4c1c-81cc-0799c6e20312 · outbound

This paper cites Chiba, T.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Chiba, T

Reference 68

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.855622Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 8685219e-b64e-4574-b181-fc274e5236d6 · outbound

This paper cites 4G: Pure fourth-order gravity.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope 4G: Pure fourth-order gravity

Reference 69

Resolution: metadata mismatch; local_arxiv, observed 2026-08-14T10:14:30.675585Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 3e33d3a9-b7ab-4db8-8b4f-6908903fde4d · outbound

This paper cites Tian, Phys.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Tian, Phys

Reference 70

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.843845Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation ef304225-0a41-437b-80be-510454e0258c · outbound

This paper cites Ay´ on-Beato and A.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Ay´ on-Beato and A

Reference 71

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.831406Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation bdebebc0-6857-49c6-a562-bc179217febd · outbound

This paper cites an unresolved cited work.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 72

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:30.818048Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation a54d9e5e-588a-4568-bdbf-f643cb0a08e4 · outbound

This paper cites Chinaglia and S.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Chinaglia and S

Reference 73

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.805560Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 61b4b6db-079d-4644-9049-5efea0d0ad84 · outbound

This paper cites Nojiri and S.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Nojiri and S

Reference 74

Resolution: unresolved; no resolver link, observed 2026-08-14T10:14:30.596163Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation 2a7362e5-e5da-48bb-8289-22b371d984f4 · outbound

This paper cites an unresolved cited work.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Unresolved cited work

Reference 75

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:14:30.786326Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation 137697c5-f57a-40a7-a8b6-ab2c9e22148d · outbound

This paper cites Baker, E.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Baker, E

Reference 76

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:14:30.774107Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-20T06:33:59.587034+00:00.

Observation b9f14cd0-805e-414d-882d-f858cdf63d62 · outbound

This paper cites The masses and shadows of the black holes Sagittarius A* and M87* in modified gravity (MOG).

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope The masses and shadows of the black holes Sagittarius A* and M87* in modified gravity (MOG)

Reference 77

Resolution: unresolved; no resolver link, observed 2026-08-14T10:14:30.608131Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation be76ddc0-0440-401e-90fb-17e4f2706cd8 · outbound

This paper cites Post-merger chirps from binary black holes as probes of the final black-hole horizon.

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope Post-merger chirps from binary black holes as probes of the final black-hole horizon

Reference 78

Resolution: unresolved; no resolver link, observed 2026-08-14T10:14:30.612775Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Pith citing papers

Observation 364a28ba-4fb2-4831-aeb8-abc8c24000ff · inbound