Pith Number

pith:XVHTAFKL

pith:2019:XVHTAFKLZF2RLJBHQNKX6PEYDI

not attested not anchored not stored refs pending

Estimating the black hole mass of NGC1313 X-1 based on the spectral and timing properties

Chang-Yin, C.-Y. Huang

arxiv:1901.01480 v1 · 2019-01-06 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XVHTAFKLZF2RLJBHQNKX6PEYDI}

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	2026-05-17T23:56:51.919823Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd4f30154bc97515a42783557f3c981a0cf738a4bceb45acf07876844a093ec4

Aliases

arxiv: 1901.01480 · arxiv_version: 1901.01480v1 · doi: 10.48550/arxiv.1901.01480 · pith_short_12: XVHTAFKLZF2R · pith_short_16: XVHTAFKLZF2RLJBH · pith_short_8: XVHTAFKL

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/XVHTAFKLZF2RLJBHQNKX6PEYDI \
  | 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: bd4f30154bc97515a42783557f3c981a0cf738a4bceb45acf07876844a093ec4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a80bad227a84a956557b6964b1b179883dcec394d9bce54a960ec40b93d2ed79",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-01-06T01:05:55Z",
    "title_canon_sha256": "662c219501e707d21044f9271dfddc156aa5f2d0bd493d49667588b4b9edd298"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.01480",
    "kind": "arxiv",
    "version": 1
  }
}