Pith Number

pith:MBMT7C5M

pith:1997:MBMT7C5MXELPNJLPDYSXETTPWZ

not attested not anchored not stored refs pending

A Doppler Map and Mass-ratio Constraint for the Black-Hole X-ray Nova Ophiuchi 1977

Alexei V. Filippenko, Danny Steeghs, Emilios T. Harlaftis, Keith Horne

arxiv:astro-ph/9707242 v1 · 1997-07-22 · 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{MBMT7C5MXELPNJLPDYSXETTPWZ}

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	2026-07-04T16:03:08.234489Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60593f8bacb916f6a56f1e25724e6fb6689133d4246688f29b153fd18419bb9d

Aliases

arxiv: astro-ph/9707242 · arxiv_version: astro-ph/9707242v1 · doi: 10.48550/arxiv.astro-ph/9707242 · pith_short_12: MBMT7C5MXELP · pith_short_16: MBMT7C5MXELPNJLP · pith_short_8: MBMT7C5M

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/MBMT7C5MXELPNJLPDYSXETTPWZ \
  | 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: 60593f8bacb916f6a56f1e25724e6fb6689133d4246688f29b153fd18419bb9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5d27534161b4e5e18557fefd5f21cb03f81315b023c97d2b64af3926b237c2c5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-07-22T10:57:45Z",
    "title_canon_sha256": "95c1478346a8e46dd894963e047d215db343b48c663942e79c76bb8ce2d628c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9707242",
    "kind": "arxiv",
    "version": 1
  }
}