Pith Number

pith:DNQOHXB4

pith:2019:DNQOHXB4LDSOAEBCSWFWAUGF5F

not attested not anchored not stored refs pending

The need for single-mode fiber-fed spectrographs

Andrew Bechter, Charles Beichman, Christian Schwab, Cullen Blake, David Coutts, Eric Bechter, Gautam Vasisht, James K. Wallace, Ji Wang, Jonathan Crass, Nemanja Jovanovic, Peter Plavchan, Robert J. Harris, Sam Halverson, Tobias Feger

arxiv:1901.07567 v2 · 2019-01-22 · astro-ph.IM · astro-ph.EP · 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{DNQOHXB4LDSOAEBCSWFWAUGF5F}

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	2026-05-17T23:55:33.672728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b60e3dc3c58e4e01022958b6050c5e97bb2fd1bc70362b3d323b098e483159b

Aliases

arxiv: 1901.07567 · arxiv_version: 1901.07567v2 · doi: 10.48550/arxiv.1901.07567 · pith_short_12: DNQOHXB4LDSO · pith_short_16: DNQOHXB4LDSOAEBC · pith_short_8: DNQOHXB4

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/DNQOHXB4LDSOAEBCSWFWAUGF5F \
  | 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: 1b60e3dc3c58e4e01022958b6050c5e97bb2fd1bc70362b3d323b098e483159b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d782fd2ef60b2a17bb57e1e056a2e2331d40e091e828ed019b0e99ba90327d7",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-01-22T19:00:02Z",
    "title_canon_sha256": "ea13c43a09e9fe8a822ac3309ddcde98bf4d0de1e59001e0924bdca8366d5159"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.07567",
    "kind": "arxiv",
    "version": 2
  }
}