LRD Watch DR1 · candidate
LRDW J041609.86-240444.1
Images
3.2″ across, north up, east left, resampled from the deepest mosaic covering the object in each band; ticks mark the catalogue position. Each band is stretched on its own noise; the composite shares one flux scale, so its colour is real.
Spectral energy distribution
- NIRCam wide
- NIRCam medium
- MIRI
- 2σ upper limit (S/N < 2)
At a glance
- Tier
- SILVER main class
- Found by
- colour lane
- Redshift
- 7.234 DJA grade 3, PRISM
- Spectral shape
- not V-shaped de Graaff+25 criteria
- F444W
- 28.33 AB S/N 9, 0.16″ aperture
- F277W − F444W
- 1.21 mag strict redness
- BH* share
- not in the BH* channel
- Compactness
- FWHM 0.184″
- Balmer break
- 0.85 ± 0.45 F356W/F200W, blue:far-uv
- Image vetting
- half-stack pass; no flags raised
- Literature
- no published match within 1″
Vetting
- Image vettingpassed
- Half-stack testpass
- Artifact risknone
- Neighbournone
- Extendedno
- No vetting notes.
Redshifts
Each redshift keeps its own column. Photometric redshifts of little red dots are unreliable: against spectra, about a third of AGN-template redshifts (z_agn; 31 of 95 in the last purity run) and about half of galaxy-template redshifts at z > 3 were catastrophic outliers (methods Section 8).
| Column | What it is | z | Source |
|---|---|---|---|
z_spec | Spectroscopic, DJA grade 3 | 7.2341 | macs0416-v4_prism-clear_1208_3109328.spec.fits |
z_vet | Adopted by vetting | 7.2341 | zspec:dja_specz_grade3.csv:3109328 |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | — | — |
z_agn | Colour-lane fit | 7.25 | AGN-inclusive templates |
Spectral checks
- V-shape (spectrum)
- not V-shaped
- Star (spectrum)
- no
- V-shape (photometry)
- passes βUV −1.25, βopt 3.82 at z_agn
- Line in F410M
- Hb, OIII 1 line-free optical band(s)
- Line-ambiguous
- yes
- Settling verdict
- inconclusive
Literature
Published objects within 1″ of this position. A match is a positional recovery, not an adopted classification.
- No published JWST little red dot or broad-line AGN within 1″.
Photometry
Circular aperture of radius 0.16″ at each band's native resolution, background from a 0.40–0.65″ annulus, programmes combined by inverse variance. For a point source multiply by the field's aperture correction (r = 0.16″ → 0.70″). Grey rows are below S/N 2.
| Band | Instrument | Pivot (µm) | f (nJy) | σ (nJy) | AB mag | S/N | Ap. corr. |
|---|---|---|---|---|---|---|---|
| F090W | NIRCam wide | 0.902 | −0.76 | 3.28 | — | −0.2 | 1.29–1.40 |
| F115W | NIRCam wide | 1.154 | 5.36 | 3.65 | 29.58 | 1.5 | 1.39–1.40 |
| F150W | NIRCam wide | 1.501 | 5.27 | 0.89 | 29.59 | 5.9 | 1.30–1.39 |
| F200W | NIRCam wide | 1.989 | 6.52 | 2.97 | 29.36 | 2.2 | 1.38–1.39 |
| F277W | NIRCam wide | 2.762 | 5.57 | 1.60 | 29.54 | 3.5 | 1.49–1.53 |
| F356W | NIRCam wide | 3.568 | 5.54 | 1.57 | 29.54 | 3.5 | 1.57–1.60 |
| F410M | NIRCam medium | 4.082 | 23.95 | 2.79 | 27.95 | 8.6 | 1.60–1.62 |
| F444W | NIRCam wide | 4.404 | 16.95 | 1.89 | 28.33 | 8.9 | 1.57–1.67 |
| F770W | MIRI | 7.636 | 6.10 | 3.76 | 29.44 | 1.6 | 2.37–2.81 |
| F1000W | MIRI | 9.947 | 2.07 | 5.12 | 30.61 | 0.4 | 2.61–2.84 |
Provenance
- Field
- MACS J0416.1-2403 (
jw01176o213,mj04161x) - Programmes
01176, 05578, 05890, 06882behind every mosaic the field measured- Pipeline rows merged
- 4 largest separation 0.024″
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Image sources
| Band | Mosaic | Native pixel | Coverage |
|---|---|---|---|
| F090W | jw01176-o213_t009_nircam_clear-f090w_i2d.fits | 0.031″ | 1.00 |
| F115W | jw01176-o211_t009_nircam_clear-f115w_i2d.fits | 0.031″ | 1.00 |
| F150W | jw05890-o002_t002_nircam_clear-f150w_i2d.fits | 0.031″ | 1.00 |
| F200W | jw01176-o213_t009_nircam_clear-f200w_i2d.fits | 0.031″ | 1.00 |
| F277W | jw01176-o213_t009_nircam_clear-f277w_i2d.fits | 0.063″ | 1.00 |
| F356W | jw01176-o213_t009_nircam_clear-f356w_i2d.fits | 0.063″ | 1.00 |
| F410M | jw01176-o211_t009_nircam_clear-f410m_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01176-o211_t009_nircam_clear-f444w_i2d.fits | 0.063″ | 1.00 |
Cite
Anderson, Jordan (2026). LRD Watch DR1: little red dot candidates from an independent search of public JWST imaging (Version DR1) [Data set]. Cerin Amroth Research. Zenodo. https://doi.org/10.5281/zenodo.23062632 Object LRDW J041609.86-240444.1.
CC BY 4.0. Please also acknowledge the JWST programmes that took the data. LRD Watch DR1 is a vetted candidate catalogue, not a complete census: it has no selection function and cannot on its own give number densities. About the release.