Pith Number

pith:S7UFLXE4

pith:2015:S7UFLXE4AKPJ6G35TCLQD245UB

not attested not anchored not stored refs pending

A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255 II. Emission- and absorption-line variability time lags

D. Trevese, F. G. Saturni, F. Vagnetti, M. Dadina, M. Perna

arxiv:1512.03195 v1 · 2015-12-10 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S7UFLXE4AKPJ6G35TCLQD245UB}

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	2026-05-18T01:20:50.100358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

97e855dc9c029e9f1b7d989701eb9da043d4b7a9a9f215d48e55d6e8df370911

Aliases

arxiv: 1512.03195 · arxiv_version: 1512.03195v1 · doi: 10.48550/arxiv.1512.03195 · pith_short_12: S7UFLXE4AKPJ · pith_short_16: S7UFLXE4AKPJ6G35 · pith_short_8: S7UFLXE4

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/S7UFLXE4AKPJ6G35TCLQD245UB \
  | 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: 97e855dc9c029e9f1b7d989701eb9da043d4b7a9a9f215d48e55d6e8df370911

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b9601b73ad578dfc199873fa7c64263fa890be6cdf34cb3dbd4b7c27ae1b9cc",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-12-10T10:06:01Z",
    "title_canon_sha256": "a7e06016eeafd069f55ca1694bba22f6654561504d3a4f27cc57c1a0bc2b34d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.03195",
    "kind": "arxiv",
    "version": 1
  }
}