| --- |
| license: cc-by-4.0 |
| task_categories: |
| - image-to-image |
| tags: |
| - astronomy |
| - supernovae |
| - panstarrs |
| - delight |
| size_categories: |
| - 1K<n<10K |
| --- |
| |
| ## Description |
|
|
| This is the dataset from DELIGHT [1], a model that locates the host galaxy of a |
| transient from multi-resolution images. The difference with the original is that |
| the images are **not** the cutouts used in the paper: they were regenerated from |
| [hips2fits](https://alasky.cds.unistra.fr/hips-image-services/hips2fits) |
| (PanSTARRS DR1 HiPS, served by CDS). |
|
|
| It contains **9,424 objects**, meant for held-out evaluation only. The training |
| and validation data is kept in a separate dataset, |
| [h2f_delight_train](https://huggingface.co/datasets/PRISM-Astro/h2f_delight_train), |
| which shares no host galaxy with this one. |
|
|
| Every cutout is centered on the **real supernova position**, and the `host_pos` |
| label is the offset from there to the host galaxy. Because these labels are |
| measured rather than simulated, this split evaluates against real observed |
| positions. |
|
|
| This split **does not include Sérsic metadata**. These objects had no `objID` |
| match in CasJobs (PanSTARRS DR1), so the `rSer*` columns are empty and no |
| synthetic transient position can be sampled from the galaxy light profile. |
|
|
| ## Image format |
|
|
| `image` has shape `(5, 5, 30, 30)`, which maps to |
| `(resolution levels, photometric bands, height, width)` |
|
|
| ## Columns |
|
|
| <div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;max-width:1000px;margin:0 auto;padding:16px 0"> |
| <table style="width:100%;border-collapse:collapse;font-size:13px"> |
| <thead><tr> |
| <th style="padding:10px 7px;text-align:left;font-weight:600;border-bottom:2px solid #4a6fb5;color:#4a6fb5;font-size:14px;width:18%">Column</th> |
| <th style="padding:10px 7px;text-align:left;font-weight:500;border-bottom:2px solid #4a6fb5;color:#4a6fb5;font-size:14px;width:20%">Type</th> |
| <th style="padding:10px 7px;text-align:left;font-weight:500;border-bottom:2px solid #4a6fb5;color:#4a6fb5;font-size:14px">Description</th> |
| </tr></thead> |
| <tbody> |
|
|
| <tr><td colspan="3" style="padding:8px 12px;font-weight:600;color:#4a6fb5;border-bottom:1px solid rgba(74,111,181,0.25);background:rgba(74,111,181,0.12)">Image and label</td></tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>image</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>(5,5,30,30)</code> float32</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Multi-resolution PanSTARRS cutout, centered on the supernova.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>host_pos</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float32 × 2</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Offset <code>[dx, dy]</code> from the supernova to the host galaxy, in level-0 pixels.</td> |
| </tr> |
| <tr><td colspan="3" style="padding:8px 12px;font-weight:600;color:#4a6fb5;border-bottom:1px solid rgba(74,111,181,0.25);background:rgba(74,111,181,0.12)">Identification</td></tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>oid</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">string</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Transient identifier (ZTF, or IAU name for historical supernovae).</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>host_name</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">string</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Catalog name of the host galaxy.</td> |
| </tr> |
|
|
| <tr><td colspan="3" style="padding:8px 12px;font-weight:600;color:#4a6fb5;border-bottom:1px solid rgba(74,111,181,0.25);background:rgba(74,111,181,0.12)">Host galaxy</td></tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>host_redshift</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Redshift of the host; <code>NaN</code> when unknown.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>hostsize</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Angular size of the host galaxy from the catalog.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>host_ra</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Right ascension of the host, in degrees.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>host_dec</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Declination of the host, in degrees.</td> |
| </tr> |
| <tr><td colspan="3" style="padding:8px 12px;font-weight:600;color:#4a6fb5;border-bottom:1px solid rgba(74,111,181,0.25);background:rgba(74,111,181,0.12)">Transient position</td></tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>meanra</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Mean right ascension of the transient, in degrees. This is the center of the cutout.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>meandec</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Mean declination of the transient, in degrees. This is the center of the cutout.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>sn_ra</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Right ascension of the supernova, in degrees.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>sn_dec</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Declination of the supernova, in degrees.</td> |
| </tr> |
| <tr><td colspan="3" style="padding:8px 12px;font-weight:600;color:#4a6fb5;border-bottom:1px solid rgba(74,111,181,0.25);background:rgba(74,111,181,0.12)">Sérsic fit — r band, from CasJobs (empty in this split)</td></tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>rSerRadius</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Effective radius Re of the r-band Sérsic fit, in arcsec. Empty in this split.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>rSerMag</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Magnitude of the r-band Sérsic fit. Empty in this split.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>rSerAb</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Axis ratio b/a of the fitted ellipse, between 0 and 1. Empty in this split.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>rSerPhi</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Position angle of the fitted ellipse, in degrees. Empty in this split.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>rSerRa</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Right ascension of the Sérsic fit center, in degrees. Empty in this split.</td> |
| </tr> |
| <tr> |
| <td style="padding:7px 7px;padding-left:20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>rSerDec</code></td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">float64</td> |
| <td style="padding:7px 7px;border-bottom:1px solid rgba(128,128,128,0.15)">Declination of the Sérsic fit center, in degrees. Empty in this split.</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| |
| ## References |
| [1] Förster, F., Muñoz Arancibia, A. M., Reyes-Jainaga, I., et al. 2022, |
| *DELIGHT: Deep Learning Identification of Galaxy Hosts of Transients using |
| Multiresolution Images*, The Astronomical Journal, 164, 195. |
| [doi:10.3847/1538-3881/ac912a](https://doi.org/10.3847/1538-3881/ac912a) |
| ```bibtex |
| @article{Förster_2022, |
| doi = {10.3847/1538-3881/ac912a}, |
| url = {https://doi.org/10.3847/1538-3881/ac912a}, |
| year = {2022}, |
| month = {oct}, |
| publisher = {The American Astronomical Society}, |
| volume = {164}, |
| number = {5}, |
| pages = {195}, |
| author = {Förster, Francisco and Muñoz Arancibia, Alejandra M. and Reyes-Jainaga, Ignacio and Gagliano, Alexander and Britt, Dylan and Cuellar-Carrillo, Sara and Figueroa-Tapia, Felipe and Polzin, Ava and Yousef, Yara and Arredondo, Javier and Rodríguez-Mancini, Diego and Correa-Orellana, Javier and Bayo, Amelia and Bauer, Franz E. and Catelan, Márcio and Cabrera-Vives, Guillermo and Dastidar, Raya and Estévez, Pablo A. and Pignata, Giuliano and Hernández-García, Lorena and Huijse, Pablo and Reyes, Esteban and Sánchez-Sáez, Paula and Ramírez, Mauricio and Grandón, Daniela and Pineda-García, Jonathan and Chabour-Barra, Francisca and Silva-Farfán, Javier}, |
| title = {DELIGHT: Deep Learning Identification of Galaxy Hosts of Transients using Multiresolution Images}, |
| journal = {The Astronomical Journal}, |
| } |
| ``` |
| |
