Pith Number

pith:H4XSLYIT

pith:2026:H4XSLYITIX7RYGGRIBMSRKMLZC

not attested not anchored not stored refs resolved

Light Propagation Prescriptions for Black Hole Movies

Alejandro C\'ardenas-Avenda\~no, Daniel Rojas-Paternina

Fast and slow light prescriptions for black hole movies differ by tens of percent when variability is rapid.

arxiv:2605.12659 v1 · 2026-05-12 · astro-ph.HE · gr-qc

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\usepackage{pith}
\pithnumber{H4XSLYITIX7RYGGRIBMSRKMLZC}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

when the intrinsic variability timescale is comparable to, or shorter than, the relevant delay spread, the high-inclination mismatch between fast- and slow-light curves can reach several tens of percent.

C2weakest assumption

The comparison holds in a controlled semi-analytic setting for a given emitting geometry, black-hole spin, and observer inclination, with delay distributions directly comparable to source correlation time.

C3one line summary

Brisk light bridges fast and slow prescriptions by using dominant temporal intervals per lensing band, with mismatches reaching tens of percent when source variability is shorter than delay spreads.

References

22 extracted · 22 resolved · 3 Pith anchors

[1] Lensing by Kerr Black Holes 2020

[2] PATOKA: Simulating Electromagnetic Observables of Black Hole Accretion, 2022

[3] Akiyamaet al.(Event Horizon Telescope), First M87 event horizon telescope results 2019 · arXiv:1906.11242

[4] First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole 2022

[5] RAPTOR I: Time-dependent radiative transfer in arbitrary spacetimes 2018 · arXiv:1801.10452

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-18T03:09:50.555484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f2f25e11345ff1c18d1405928a98bc8b94d9372aac5fc30ccc6ba6e92408782

Aliases

arxiv: 2605.12659 · arxiv_version: 2605.12659v1 · doi: 10.48550/arxiv.2605.12659 · pith_short_12: H4XSLYITIX7R · pith_short_16: H4XSLYITIX7RYGGR · pith_short_8: H4XSLYIT

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/H4XSLYITIX7RYGGRIBMSRKMLZC \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 3f2f25e11345ff1c18d1405928a98bc8b94d9372aac5fc30ccc6ba6e92408782

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5daa93e2675089571e9bac5d7d18c8d18da6381ecb3d988d423f70f1fc899ee3",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-05-12T19:06:19Z",
    "title_canon_sha256": "e34dff5991046ed35cccaa8215c41e79cdf6d111d9915be5c07fd9e831cc40a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.12659",
    "kind": "arxiv",
    "version": 1
  }
}