Pith Number

pith:SB4QEVUU

pith:1998:SB4QEVUU7NQOZARCTNG7NZXLNN

not attested not anchored not stored refs pending

H-alpha from High Velocity Clouds

L. M. Haffner, R. J. Reynolds, S. L. Tufte

arxiv:astro-ph/9811270 v1 · 1998-11-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SB4QEVUU7NQOZARCTNG7NZXLNN}

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	2026-07-04T14:16:20.407351Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9079025694fb60ec82229b4df6e6eb6b56889fbb4a70b565b40809cb490511b6

Aliases

arxiv: astro-ph/9811270 · arxiv_version: astro-ph/9811270v1 · doi: 10.48550/arxiv.astro-ph/9811270 · pith_short_12: SB4QEVUU7NQO · pith_short_16: SB4QEVUU7NQOZARC · pith_short_8: SB4QEVUU

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/SB4QEVUU7NQOZARCTNG7NZXLNN \
  | 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: 9079025694fb60ec82229b4df6e6eb6b56889fbb4a70b565b40809cb490511b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1cb78cd2fde553e52ee2c616f60e5550032a3958a2234934c15f30d31296c8f4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-11-17T18:28:47Z",
    "title_canon_sha256": "35554f4f65c7241da13c55f02554c02b7c86df9c6f329c25a0b29fbc44f0f48e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9811270",
    "kind": "arxiv",
    "version": 1
  }
}