Pith Number

pith:NJZK2IAY

pith:2026:NJZK2IAYMAPWHZHLRXTZYZUZEO

not attested not anchored not stored refs pending

Sensitivities of Black Hole Images from GRMHD Simulations

Alejandro C\'ardenas-Avenda\~no, Cora Prather, M\'ario Raia Neto, Pedro Naethe Motta

Automatic differentiation-computed gradients of GRMHD black hole images can guide parameter exploration even in the presence of noise.

arxiv:2604.11869 v2 · 2026-04-13 · astro-ph.HE

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\usepackage{pith}
\pithnumber{NJZK2IAYMAPWHZHLRXTZYZUZEO}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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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

Automatic differentiation-computed image gradients can guide parameter exploration effectively even in the presence of noise.

C2weakest assumption

That the mock data analysis and idealized blurring/noise models sufficiently represent the challenges of real EHT observations, including unmodeled systematics and the full complexity of GRMHD parameter degeneracies.

C3one line summary

Differentiable GRMHD image sensitivities create a structured error landscape that supports gradient-based parameter recovery for black hole imaging under idealized and noisy conditions.

Receipt and verification

First computed	2026-06-19T16:10:37.304535Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a72ad2018601f63e4eb8de79c669923a20f3156a2f11595fa60f17bb5b9aa31

Aliases

arxiv: 2604.11869 · arxiv_version: 2604.11869v2 · doi: 10.48550/arxiv.2604.11869 · pith_short_12: NJZK2IAYMAPW · pith_short_16: NJZK2IAYMAPWHZHL · pith_short_8: NJZK2IAY

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/NJZK2IAYMAPWHZHLRXTZYZUZEO \
  | 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: 6a72ad2018601f63e4eb8de79c669923a20f3156a2f11595fa60f17bb5b9aa31

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89e7e9ccd61503958a9173b1fd39283e73d85d3034c7757565061d52e7b40e3f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-04-13T18:00:00Z",
    "title_canon_sha256": "28b6bb312404eeef85b29782c1a487cf0be4258d7273268a0cb72979a0929dfb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.11869",
    "kind": "arxiv",
    "version": 2
  }
}