Pith Number

pith:Z6YEQPXA

pith:2021:Z6YEQPXAPIVD4B2MSGBAWHAW2O

not attested not anchored not stored refs pending

The 450 days X-ray monitoring of the changing-look AGN 1ES 1927+654

A. C. Fabian, B. Trakhtenbrot, C.-H. Chan, C. L. MacLeod, C. Ricci, D. Altamirano, D. Pasham, E. Cackett, E. Kara, I. Arcavi, J. Steiner, K. C. Gendreau, L. C. Ho, M. Loewenstein, P. Gandhi, P. Kosec, R. Li, R. Remillard, Z. Arzoumanian

arxiv:2102.05666 v1 · 2021-02-10 · astro-ph.HE · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z6YEQPXAPIVD4B2MSGBAWHAW2O}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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.

Cited by

1 paper in Pith

The Radius of PSR J0740+6620 from NICER and XMM-Newton Data

Receipt and verification

First computed	2026-07-05T02:55:11.677056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfb0483ee07a2a3e074c91820b1c16d3bc5f85914fd9dbfdf928947bc2f9cf0b

Aliases

arxiv: 2102.05666 · arxiv_version: 2102.05666v1 · doi: 10.48550/arxiv.2102.05666 · pith_short_12: Z6YEQPXAPIVD · pith_short_16: Z6YEQPXAPIVD4B2M · pith_short_8: Z6YEQPXA

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/Z6YEQPXAPIVD4B2MSGBAWHAW2O \
  | 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: cfb0483ee07a2a3e074c91820b1c16d3bc5f85914fd9dbfdf928947bc2f9cf0b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7cd9582916e3ba228d3059f265bc1b0e0da35a05d656a1c2371bb46b45dda8a6",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-02-10T19:00:00Z",
    "title_canon_sha256": "bc85ab92f2b88514664e4a46c55a62dc77c422e0c2f4ab43380b74ce33c5524a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.05666",
    "kind": "arxiv",
    "version": 1
  }
}