Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links, observed 2026-08-14T11:44:41.691334Z
Paper Citation Record · LEDGER
As of 16 August 2026, this Paper Citation Record lists 89 of 89 outbound references and 1 inbound Pith citation observation for arXiv:1908.08552.
A citation records a reference. It does not transfer a finding from one paper to another.
Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links, observed 2026-08-14T11:44:41.691334Z
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-16T06:30:59.297886+00:00
Pith citing papers itemized under the disclosed page cap.
Source: paper_references, paper_reference_links, observed 2026-08-15T14:49:10.632845Z
A source-named dated measurement, never combined with another source.
Source: pith, observed 2026-08-15T14:49:12.107181Z
89 of 89 outbound references displayed
External citation measurements
No source-named external measurement is stored.
Observation 06f6564d-a871-46a4-a7ba-9bb7d2631b64 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 1
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 620ced45-7884-4c2f-84f5-33484530d222 · outbound
An extremely X--ray weak blazar at z=5 F., Fan, X., Richards, G
Reference 2
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 4186a1ec-3227-4c3b-a456-4769bfb418d7 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 3
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 9d2bf33a-c77e-4963-99c5-c9666af24d9c · outbound
An extremely X--ray weak blazar at z=5 C.-J., Large, M
Reference 4
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 641257ff-a113-4683-8982-b81582b239eb · outbound
An extremely X--ray weak blazar at z=5 H., & Perley, R
Reference 5
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 193d560c-b1c0-4244-8ba4-8df8d688a20b · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 6
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation f7f3cee9-71aa-4522-8831-e363686f150a · outbound
An extremely X--ray weak blazar at z=5 1984, The Messenger, 38, 9
Reference 7
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 6e9616f4-c04a-4eb3-a0f1-37b00a2491a3 · outbound
An extremely X--ray weak blazar at z=5 2019, MNRAS, 484, 204
Reference 8
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 6beaeca1-7038-4b76-91bc-8ab66ce79d12 · outbound
An extremely X--ray weak blazar at z=5 2013, MNRAS, 431, 210
Reference 9
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 72e6d8dc-3b6d-4928-81e3-7fdd0d065422 · outbound
An extremely X--ray weak blazar at z=5 2018, A&A, 612, A59
Reference 10
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation c004692f-ae3e-491c-b119-b170a0504a3b · outbound
An extremely X--ray weak blazar at z=5 2017, A&A, 606, A15
Reference 11
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 3cbb1ee3-72de-4998-b4ae-36931b8dad51 · outbound
An extremely X--ray weak blazar at z=5 1997, MNRAS, 286, 415
Reference 12
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 6615aadb-eeac-4a5c-a1eb-b5bcba64e17f · outbound
An extremely X--ray weak blazar at z=5 C., & Pan-STARRS Team 2016, American Astronomical Society Meeting Abstracts #227, 227, 324.07
Reference 13
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation efc9f0c5-e3ae-41e7-9b43-f56dc123279e · outbound
An extremely X--ray weak blazar at z=5 D., Jones, P
Reference 14
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation ac921f22-92a8-4004-8c9a-4889f6a0a027 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 15
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 8cf4651e-1d86-4532-b645-728efb307698 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 16
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 2aee9a3b-d1b7-476f-aba1-40bcc9c64f53 · outbound
An extremely X--ray weak blazar at z=5 D., Pogge, R
Reference 17
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation a9caae96-cfa6-425d-8820-1f185fdba755 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 18
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation c07391b6-c987-4b78-9ce3-e9f4076bb4da · outbound
An extremely X--ray weak blazar at z=5 L., & Keating, B
Reference 19
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 287f1bb2-f717-443d-8686-65b3b954cf3f · outbound
An extremely X--ray weak blazar at z=5 2005, International Journal of Modern Physics A, 20, 3121
Reference 20
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 3a98fe86-6d3f-4efb-8977-b566f2fa85a6 · outbound
An extremely X--ray weak blazar at z=5 T., Honscheid, K., et al
Reference 21
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 0d7b4e64-8d50-4e20-976e-ab7d855100ff · outbound
An extremely X--ray weak blazar at z=5 J., Hewett, P
Reference 22
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 22d67264-88c6-49cc-894e-cdd3a2298f8c · outbound
An extremely X--ray weak blazar at z=5 E., de Vicente, P., & Shu, F
Reference 23
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 3f3675e9-8521-47b3-9ea8-7f525722da1b · outbound
An extremely X--ray weak blazar at z=5 2004, ApJ, 611, 1005
Reference 24
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 13d92fca-3df8-4ca2-b225-7e879dbade6c · outbound
An extremely X--ray weak blazar at z=5 2009, MNRAS, 397, 985
Reference 25
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 4550170e-852d-49fc-803e-f56af2835edc · outbound
An extremely X--ray weak blazar at z=5 2010, MNRAS, 402, 497
Reference 26
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation df5c8f79-06c7-4718-b205-af5f0dd89e55 · outbound
An extremely X--ray weak blazar at z=5 2013, MNRAS, 432, 2818
Reference 27
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 7b3664f2-5af4-455b-a7b6-8b21464d6f22 · outbound
An extremely X--ray weak blazar at z=5 2014, MNRAS, 440, L111
Reference 28
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 3394c44a-e63a-481c-8278-9f9398f692ab · outbound
An extremely X--ray weak blazar at z=5 2015, MNRAS, 450, L34
Reference 29
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 100abe40-028d-497d-85be-82b22f115006 · outbound
An extremely X--ray weak blazar at z=5 2015, MNRAS, 448, 1060
Reference 30
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 665a6874-bc93-4422-b3df-701f9194f398 · outbound
An extremely X--ray weak blazar at z=5 Open Universe for Blazars: a new generation of astronomical products based on 14 years of Swift-XRT data
Reference 31
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 99a2136a-d103-4121-84d3-3346ccdc02aa · outbound
An extremely X--ray weak blazar at z=5 2006, Proc
Reference 32
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation bcf0088d-00ca-4434-bbb4-0ecd7f069997 · outbound
An extremely X--ray weak blazar at z=5 R., Suntzeff, N
Reference 33
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 20310619-c8db-4078-95de-b8e8fe706f86 · outbound
An extremely X--ray weak blazar at z=5 B., Heathcote, S
Reference 34
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation aa24289f-34fd-4b33-b2e1-ce7c1df9dd04 · outbound
An extremely X--ray weak blazar at z=5 E., Romani, R
Reference 35
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 5d5fd5e4-0069-49be-85b0-274e8caca5db · outbound
An extremely X--ray weak blazar at z=5 C., Kovalev, Y
Reference 36
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 27ab2445-673b-42ea-bfdf-ad62ad13232a · outbound
An extremely X--ray weak blazar at z=5 The Dark Energy Camera (DECam)
Reference 37
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 4f0fdc61-45ab-4c32-b691-340623efb629 · outbound
An extremely X--ray weak blazar at z=5 R., Hancock, P
Reference 38
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 396e334c-5cce-4931-a6f6-fd96b7ed9d1e · outbound
An extremely X--ray weak blazar at z=5 2019, MNRAS, in press
Reference 39
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 090b29e4-5d43-4c3c-b784-baabd09b51bf · outbound
An extremely X--ray weak blazar at z=5 2007, ApJ, 656, 680
Reference 40
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 1e974769-89c1-48d1-b730-57e4c52d38e9 · outbound
An extremely X--ray weak blazar at z=5 D., Fan, X., et al
Reference 41
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 6a573247-7318-4c05-942d-2e4a11b2521b · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 42
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation a15ed7d6-b342-4133-9da0-5f52c9c654b2 · outbound
An extremely X--ray weak blazar at z=5 I., Goss, W
Reference 43
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation d0c26c74-7054-4527-a65f-7d58f70e5ea0 · outbound
An extremely X--ray weak blazar at z=5 2016, MNRAS, 456, 2993
Reference 44
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation aa9595d1-8c14-46a1-92e4-053dd18003e1 · outbound
An extremely X--ray weak blazar at z=5 2011, ApJ, 731, 53
Reference 45
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation eebed957-84c9-4faf-b7a2-24a749633870 · outbound
An extremely X--ray weak blazar at z=5 2015, Ap&SS, 357, 75
Reference 46
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 2d0c4a21-d220-4d91-82d0-48018fcf68e2 · outbound
An extremely X--ray weak blazar at z=5 J., et al
Reference 47
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 1bb0ce3a-5270-493a-ab50-2dd823bb4b93 · outbound
An extremely X--ray weak blazar at z=5 P., et al
Reference 48
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 519e63ed-b7ac-49da-8c69-9e2fe08fc30a · outbound
An extremely X--ray weak blazar at z=5 M., Murphy, T., & Ekers, R
Reference 49
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation be9ce313-6efc-4df0-81f1-66b35dc667d0 · outbound
An extremely X--ray weak blazar at z=5 D., Jiang, L., Fan, X., et al
Reference 50
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation e868bedf-a659-4331-bce8-90cbde5fcba2 · outbound
An extremely X--ray weak blazar at z=5 G., Banerji, M., Gonzalez, E., et al
Reference 51
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation aba13bcb-2f6f-44ce-a869-6e4b26473a4f · outbound
An extremely X--ray weak blazar at z=5 2006, MNRAS, 365, 807
Reference 52
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 42322480-ce9b-491f-89e6-a8455b8eb4a0 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 53
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 11059a34-18ab-4072-a595-4c8821590e95 · outbound
An extremely X--ray weak blazar at z=5 2010, Proc
Reference 54
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 995fa6de-bda2-4cbe-a4eb-b7af7164734b · outbound
An extremely X--ray weak blazar at z=5 2014, A&A, 568, A9
Reference 55
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation e5325bf6-bef3-478d-b143-70165944154b · outbound
An extremely X--ray weak blazar at z=5 J., Warren, S
Reference 56
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation db2c8c33-53e9-4e9f-871a-3c44f941ff0a · outbound
An extremely X--ray weak blazar at z=5 M., Ekers, R
Reference 57
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 8947bdd9-13c9-434b-8107-cfe37b378772 · outbound
An extremely X--ray weak blazar at z=5 D., & Thorne, K
Reference 58
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 714d83c0-c4f3-4245-8b94-caade6bb4d08 · outbound
An extremely X--ray weak blazar at z=5 2002, ApJ, 574, 315
Reference 59
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation b040bbda-0314-4bd9-b6c1-7c8b35f7afe1 · outbound
An extremely X--ray weak blazar at z=5 N., Thomasson, P., Kopylov, A
Reference 60
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 770b99d2-2f1e-4c6f-becf-1c566bea0eb3 · outbound
An extremely X--ray weak blazar at z=5 M., Ferrarese, L., Gilbert, K
Reference 61
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 2d482bd7-90d1-4891-bf69-59ac939872b4 · outbound
An extremely X--ray weak blazar at z=5 2016, MNRAS, 458, 3047
Reference 62
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation bd44d1ae-69fc-416b-931c-8e1a5ee72a31 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 63
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 1ae07f11-527c-4ee1-83b5-59c3e4117177 · outbound
An extremely X--ray weak blazar at z=5 L., McMahon, R
Reference 64
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 6919446f-25b9-44a3-8b05-7a98cf4db58a · outbound
An extremely X--ray weak blazar at z=5 Three new VHS-DES Quasars at 6.7 < z < 6.9 and Emission Line Properties at z > 6.5
Reference 65
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation b753f5b4-96e2-4bae-a245-00d41abe4728 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 66
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 6ca18dc7-4c3d-4aba-82e0-d53aeb7d043e · outbound
An extremely X--ray weak blazar at z=5 T., Lacy, M., Storrie-Lombardi, L
Reference 67
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation f17bb180-2458-473c-a68d-8c4e0aa81d0c · outbound
An extremely X--ray weak blazar at z=5 T., Kruczek, N
Reference 68
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 3bb827f3-426a-499a-b81b-f99fa6eae05d · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 69
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 53b70c20-2fa1-4031-9c34-9ed04d08e06d · outbound
An extremely X--ray weak blazar at z=5 W., Sowards-Emmerd, D., Greenhill, L., & Michelson, P
Reference 70
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 8ee84d3b-4758-4aea-a5de-3585a87d316f · outbound
An extremely X--ray weak blazar at z=5 R., Webb, N
Reference 71
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation a2520477-f6d0-4815-ad3b-d8b674fccbec · outbound
An extremely X--ray weak blazar at z=5 2012, MNRAS, 426, L91
Reference 72
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 8fa8a8fb-5c18-4697-87c7-0ffe671faa0c · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 73
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation ca57ba7a-3185-468c-9f69-8f14b03d0627 · outbound
An extremely X--ray weak blazar at z=5 I., & Sunyaev, R
Reference 74
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 8349ecae-0d6e-412f-90e4-a0f0c01605ce · outbound
An extremely X--ray weak blazar at z=5 E., Strauss, M
Reference 75
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 872b3dc7-d654-4b22-9e57-277645b57c10 · outbound
An extremely X--ray weak blazar at z=5 A., Ross, N
Reference 76
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 78d03e69-194b-4e70-ba91-b94d90540a10 · outbound
An extremely X--ray weak blazar at z=5 T., Strauss, M
Reference 77
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation cae01d44-5022-40ad-845e-071d78ba1ebd · outbound
An extremely X--ray weak blazar at z=5 W., Michelson, P
Reference 78
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 28305e0b-39ef-463e-99b8-7339b059b835 · outbound
An extremely X--ray weak blazar at z=5 V ., Brandt, W
Reference 79
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation dc3b3a20-42e0-4565-a22f-c610f2eb203c · outbound
An extremely X--ray weak blazar at z=5 1993, Astronomical Data Analysis Software and Systems II, 52, 173 Vanden Berk, D
Reference 80
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 1800c039-aca5-4a40-9ac8-171043a52cb7 · outbound
An extremely X--ray weak blazar at z=5 P., McMahon, R
Reference 81
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation b15066d7-fbf5-4a62-9229-6a73149a40d2 · outbound
An extremely X--ray weak blazar at z=5 2011, A&A, 536, A105
Reference 82
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 71d546c0-4288-4dc9-ab42-a11aafaf249e · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 83
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation a2c60da3-2a32-4270-bfe9-f47d4f5d7312 · outbound
An extremely X--ray weak blazar at z=5 B., Lenc, E., Bell, M
Reference 84
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation fff6703b-2706-4f04-8b82-fdd6b77c3990 · outbound
An extremely X--ray weak blazar at z=5 J., Delorme, P., Reylé, C., et al
Reference 85
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation d39bea7f-6d15-48b6-889e-d0dc5de83ba0 · outbound
An extremely X--ray weak blazar at z=5 E., Griffith, M
Reference 86
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 5d928a45-a53c-4069-8963-54e9fd0ea535 · outbound
An extremely X--ray weak blazar at z=5 L., Eisenhardt, P
Reference 87
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation f7cdecc0-78cb-411e-bb03-82bac64fef13 · outbound
An extremely X--ray weak blazar at z=5 G., Adelman, J., Anderson, J
Reference 88
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation c33e1c70-c210-43ec-8f8f-aa82c3c2e630 · outbound
An extremely X--ray weak blazar at z=5 Unresolved cited work
Reference 89
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 1edb739a-6428-4665-a2f8-e927ca4f6490 · inbound
The most extreme high-z radio quasars in the eRASS:1 X-ray survey An extremely X--ray weak blazar at z=5
Reference 266
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.