Pith Number

pith:554ERFK7

pith:2018:554ERFK7YUWM2I7MLR3DCETOKQ

not attested not anchored not stored refs pending

The Parallax of the Red Hypergiant VX Sgr with Accurate Tropospheric Delay Calibration

Bo Zhang, Guangli Wang, Karl M. Menten, Mark J. Reid, Shuangjing Xu, Xingwu Zheng

arxiv:1804.00894 v1 · 2018-04-03 · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{554ERFK7YUWM2I7MLR3DCETOKQ}

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.

Receipt and verification

First computed	2026-05-18T00:15:14.912904Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef7848955fc52ccd23ec5c7631126e542116e52d35810239a7a81ec9bff62b7e

Aliases

arxiv: 1804.00894 · arxiv_version: 1804.00894v1 · doi: 10.48550/arxiv.1804.00894 · pith_short_12: 554ERFK7YUWM · pith_short_16: 554ERFK7YUWM2I7M · pith_short_8: 554ERFK7

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/554ERFK7YUWM2I7MLR3DCETOKQ \
  | 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: ef7848955fc52ccd23ec5c7631126e542116e52d35810239a7a81ec9bff62b7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "367496bbfb19e7342a9587a6b4d69e7ab6812229ccced775494973e74a73a718",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-04-03T10:06:24Z",
    "title_canon_sha256": "2f5466d2c7b9f8cb1b3a721b9bc437e5add4932ee951410edbe891cf6947d690"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.00894",
    "kind": "arxiv",
    "version": 1
  }
}