# Data Products **URL:** https://www.rubin.community/c/support/data/34.md [Latest](https://www.rubin.community/latest.md) · [Categories](https://www.rubin.community/categories.md) · [Tags](https://www.rubin.community/tags.md) --- ## [About the Data Products category](https://www.rubin.community/t/about-the-data-products-category/2275)
**Author:** [@jsick](https://www.rubin.community/u/jsick)\ **Replies:** 0
Ask science questions about released or future LSST data products. Questions will be monitored by Rubin Observatory staff and answered in a timely fashion. As often as possible, the answers will point to permanent locat… --- ## [Why alerts in only part of the focal plane?](https://www.rubin.community/t/why-alerts-in-only-part-of-the-focal-plane/12832)
**Author:** [@craiglagegit](https://www.rubin.community/u/craiglagegit)\ **Replies:** 2\ **Last updated:** [October 23, 2026, 6:00pm UTC](https://www.rubin.community/t/why-alerts-in-only-part-of-the-focal-plane/12832 "2026-10-23T18:00:55Z")
Hi all. I extracted the alerts for a given visit during internal testing. When I plot the location of the alerts on the focal plane, I get only partial coverage as in the attached plot. I hypothesize that the reason i… --- ## [How is SENSOR\_EDGE information handled in DP2 CellCoadds and Object catalogues?](https://www.rubin.community/t/how-is-sensor-edge-information-handled-in-dp2-cellcoadds-and-object-catalogues/12827)
**Author:** [@Saremi-Elham](https://www.rubin.community/u/Saremi-Elham)\ **Replies:** 2\ **Last updated:** [October 16, 2026, 1:49pm UTC](https://www.rubin.community/t/how-is-sensor-edge-information-handled-in-dp2-cellcoadds-and-object-catalogues/12827 "2026-10-16T13:49:18Z")
I noticed that the released DP2 deep\_coadd CellCoadds do not contain a SENSOR\_EDGE mask plane, while the DP2 Object catalogues include pixelFlags\_sensor\_edge and pixelFlags\_sensor\_edgeCenter. I checked several patches an… --- ## [Retrieving alert packets](https://www.rubin.community/t/retrieving-alert-packets/12822)
**Author:** [@craiglagegit](https://www.rubin.community/u/craiglagegit)\ **Replies:** 2\ **Last updated:** [October 13, 2026, 2:11pm UTC](https://www.rubin.community/t/retrieving-alert-packets/12822 "2026-10-13T14:11:44Z")
I’ve been working through the tutorial for alert packet retrieval. With the alert\_id that is in the tutorial, this retrieval is successful: alert\_id = “170059317401616524” response = await client.get(url, params={“ID”… --- ## [Any plans for a storage-optimized release of the catalog light curves?](https://www.rubin.community/t/any-plans-for-a-storage-optimized-release-of-the-catalog-light-curves/12410)
**Author:** [@kburdge](https://www.rubin.community/u/kburdge)\ **Replies:** 16\ **Last updated:** [October 12, 2026, 2:03pm UTC](https://www.rubin.community/t/any-plans-for-a-storage-optimized-release-of-the-catalog-light-curves/12410 "2026-10-12T14:03:23Z")
Hi all, I was wondering whether there’s any plan to release a storage-conscious version of the catalog files — optimized to use as little disk space as possible while still providing maximum utility to the community. E… --- ## [Issue with sersic\_reff\_major in object table](https://www.rubin.community/t/issue-with-sersic-reff-major-in-object-table/12812)
**Author:** [@ConnorStone](https://www.rubin.community/u/ConnorStone)\ **Replies:** 3\ **Last updated:** [October 10, 2026, 12:14am UTC](https://www.rubin.community/t/issue-with-sersic-reff-major-in-object-table/12812 "2026-10-10T00:14:56Z")
Hello, I was using the sersic fits in the object table for DP2 and noticed the fits looked off when projected over an image. I took the sersic parameters and fed them into AstroPhot (another parametric fitting code) and… --- ## [Clarifying questions on some of the fields in the DiaSource Table of the Alert Production Database](https://www.rubin.community/t/clarifying-questions-on-some-of-the-fields-in-the-diasource-table-of-the-alert-production-database/12808)
**Author:** [@heloise](https://www.rubin.community/u/heloise)\ **Replies:** 4\ **Last updated:** [October 7, 2026, 12:38am UTC](https://www.rubin.community/t/clarifying-questions-on-some-of-the-fields-in-the-diasource-table-of-the-alert-production-database/12808 "2026-10-07T00:38:42Z")
Hello, I have misc questions about the fields in the DiaSource Table - I’ve been reading the heck out of that schema and I need help: apFlux\_flag\_apertureTruncated: The aperture did no fit within the image. Q: is that … --- ## [How to tell if the zeropoints are calculated incorrectly (due to clouds or something else)?](https://www.rubin.community/t/how-to-tell-if-the-zeropoints-are-calculated-incorrectly-due-to-clouds-or-something-else/12698)
**Author:** [@mschwamb](https://www.rubin.community/u/mschwamb)\ **Replies:** 11\ **Last updated:** [October 2, 2026, 7:03pm UTC](https://www.rubin.community/t/how-to-tell-if-the-zeropoints-are-calculated-incorrectly-due-to-clouds-or-something-else/12698 "2026-10-02T19:03:50Z")
I suspect that the low i-band points in the bottom right are due to clouds/bad zeropoints. This is a dwarf planet and bright enough that it has sufficient past observations that show the rotational light curve does not … --- ## [How to figure out which DP2 visits have DP2 template coverage?](https://www.rubin.community/t/how-to-figure-out-which-dp2-visits-have-dp2-template-coverage/12782)
**Author:** [@mschwamb](https://www.rubin.community/u/mschwamb)\ **Replies:** 2\ **Last updated:** [October 2, 2026, 12:49pm UTC](https://www.rubin.community/t/how-to-figure-out-which-dp2-visits-have-dp2-template-coverage/12782 "2026-10-02T12:49:05Z")
I’m trying to figure out which DP2 visits have template coverage. I would imagine that every observation with a template generated at least one diaSource. Is it okay to query diaSource table for unique visit ID and dete… --- ## [General questions on DP2 bandpasses](https://www.rubin.community/t/general-questions-on-dp2-bandpasses/12734)
**Author:** [@mginolin](https://www.rubin.community/u/mginolin)\ **Replies:** 2\ **Last updated:** [September 29, 2026, 4:18pm UTC](https://www.rubin.community/t/general-questions-on-dp2-bandpasses/12734 "2026-09-29T16:18:52Z")
Hello! I had a few questions after looking at the DP2 bandpasses (accessed as shown in the tutorial notebook 204.4 204.4. Filter bandpasses — DP2): Is it possible to know which atmospheric model was used to compute th… --- ## [Saturation limits](https://www.rubin.community/t/saturation-limits/12649)
**Author:** [@sdcorle1](https://www.rubin.community/u/sdcorle1)\ **Replies:** 2\ **Last updated:** [September 24, 2026, 3:34pm UTC](https://www.rubin.community/t/saturation-limits/12649 "2026-09-24T15:34:53Z")
This topic was raised in 2020, but we now have some early results. The Science Book gave the LSST saturation limits as u, g, r, i, z, y = 14.7, 15.7, 15.8, 15.8, 15.3 and 13.9. I believe that I saw some recent alerts dat… --- ## [Status of the Solar System Processing Searches of Pre-LSST Data/DP2 Data](https://www.rubin.community/t/status-of-the-solar-system-processing-searches-of-pre-lsst-data-dp2-data/12699)
**Author:** [@mschwamb](https://www.rubin.community/u/mschwamb)\ **Replies:** 5\ **Last updated:** [September 23, 2026, 8:07pm UTC](https://www.rubin.community/t/status-of-the-solar-system-processing-searches-of-pre-lsst-data-dp2-data/12699 "2026-09-23T20:07:31Z")
At the RCW, we were pointed here to this website summary of Rubin MPC submissions for DP2 and pre-LSST data. Are the searches complete by the Rubin Solar System Processing team particularly for NEOs and middle Solar Sys… --- ## [How to determine when to use trailFlux versus psfFlux for Solar System objects?](https://www.rubin.community/t/how-to-determine-when-to-use-trailflux-versus-psfflux-for-solar-system-objects/12713)
**Author:** [@mschwamb](https://www.rubin.community/u/mschwamb)\ **Replies:** 3\ **Last updated:** [September 21, 2026, 7:01pm UTC](https://www.rubin.community/t/how-to-determine-when-to-use-trailflux-versus-psfflux-for-solar-system-objects/12713 "2026-09-21T19:01:30Z")
It is expected that even main belt asteroids will be slightly trailed in LSSTCam 30s exposure. It’s not clear how extendedness is estimated and whether something trailed by a pixel or two would be identified and flag wit… --- ## [Slow Solar System query](https://www.rubin.community/t/slow-solar-system-query/12657)
**Author:** [@mschwamb](https://www.rubin.community/u/mschwamb)\ **Replies:** 15\ **Last updated:** [September 20, 2026, 9:24am UTC](https://www.rubin.community/t/slow-solar-system-query/12657 "2026-09-20T09:24:18Z")
Maybe my sense of how fast queries should go is way off, but I’m surprised that this query is taking nearly 40s to return back. Is there a better way to write the following to get the query to return back faster? “selec… --- ## [DP2 coadd sigma and PSF extraction](https://www.rubin.community/t/dp2-coadd-sigma-and-psf-extraction/12701)
**Author:** [@Debasish\_Hazarika](https://www.rubin.community/u/Debasish_Hazarika)\ **Replies:** 2\ **Last updated:** [September 17, 2026, 6:22pm UTC](https://www.rubin.community/t/dp2-coadd-sigma-and-psf-extraction/12701 "2026-09-17T18:22:45Z")
Hi Rubin team & the community, I have two questions on extracting the sigma & PSF images for a DP2 cutout: Sigma / correlated noise: for a band (say ‘g’) I am taking a 324 × 324 pixel region from .variance.array, set… --- ## [EDP2: blendedness is negative for ~85% of primary objects, and mostly unflagged](https://www.rubin.community/t/edp2-blendedness-is-negative-for-85-of-primary-objects-and-mostly-unflagged/12616)
**Author:** [@lrspeiser](https://www.rubin.community/u/lrspeiser)\ **Replies:** 5\ **Last updated:** [September 17, 2026, 5:34pm UTC](https://www.rubin.community/t/edp2-blendedness-is-negative-for-85-of-primary-objects-and-mostly-unflagged/12616 "2026-09-17T17:34:54Z")
Forgive my post if I just completely messed something up! In the EDP2 Object catalog, blendedness is negative far more often and far more extremely than in DP1. It is defined as a flux fraction, so I expected it on \[0,… --- ## [diaObject summary stats are only provided for the observed filter](https://www.rubin.community/t/diaobject-summary-stats-are-only-provided-for-the-observed-filter/11991)
**Author:** [@genghisken](https://www.rubin.community/u/genghisken)\ **Replies:** 8\ **Last updated:** [September 10, 2026, 1:38am UTC](https://www.rubin.community/t/diaobject-summary-stats-are-only-provided-for-the-observed-filter/11991 "2026-09-10T01:38:26Z")
Each time we receive an alert, we get summary stats with the diaObject relating to the current band only. All the other bands are NaN or zero (see r-band example below). Is there a reason for this? I assume this is a spe… --- ## [Sky-estimation box size used for DP2 deep coadds](https://www.rubin.community/t/sky-estimation-box-size-used-for-dp2-deep-coadds/12455)
**Author:** [@ggolini](https://www.rubin.community/u/ggolini)\ **Replies:** 4\ **Last updated:** [September 10, 2026, 1:35am UTC](https://www.rubin.community/t/sky-estimation-box-size-used-for-dp2-deep-coadds/12455 "2026-09-10T01:35:40Z")
Hello community! I am trying to understand to which extent we can use LSST DP2 data to study intracluster light and I am trying to asses the impact of sky subtraction on measurements taken at large cluster-centric radii… --- ## [How is bboxSize determined for alerts?](https://www.rubin.community/t/how-is-bboxsize-determined-for-alerts/12543)
**Author:** [@carrieholt](https://www.rubin.community/u/carrieholt)\ **Replies:** 6\ **Last updated:** [September 8, 2026, 10:52pm UTC](https://www.rubin.community/t/how-is-bboxsize-determined-for-alerts/12543 "2026-09-08T22:52:28Z")
I’m trying to understand how the detection footprint of a DiaSource gets determined, and how that gets translated to the bboxSize for the alert. I can’t seem to find the code. For context, I am working with comet data i… --- ## [In LSST SIM Data Release 2, why do some binary components have labels = -32768?](https://www.rubin.community/t/in-lsst-sim-data-release-2-why-do-some-binary-components-have-labels-32768/12515)
**Author:** [@melanieAzaidel](https://www.rubin.community/u/melanieAzaidel)\ **Replies:** 1\ **Last updated:** [August 20, 2026, 5:26pm UTC](https://www.rubin.community/t/in-lsst-sim-data-release-2-why-do-some-binary-components-have-labels-32768/12515 "2026-08-20T17:26:40Z")
I’m looking through the lsst\_sim.simdr2\_binary simulated catalog described in Dal Tio et al 2022 and am finding that a significant number of binary systems have either the c2\_kw or c2\_label column set to -32768. This val… --- ## [Incompatible dimension universe versions - database universe (r30+)](https://www.rubin.community/t/incompatible-dimension-universe-versions-database-universe-r30/12456)
**Author:** [@Mandy8808](https://www.rubin.community/u/Mandy8808)\ **Replies:** 5\ **Last updated:** [August 17, 2026, 3:25pm UTC](https://www.rubin.community/t/incompatible-dimension-universe-versions-database-universe-r30/12456 "2026-08-17T15:25:43Z")
Hi, Recently I developed a pipeline to work with modified injected stamps. The pipeline works correctly with releases prior to r30 (e.g. r29). The problem appears when I try to create a local repository. During the tra… --- ## [Trifid Lagoon Dust Correction CMD Issues](https://www.rubin.community/t/trifid-lagoon-dust-correction-cmd-issues/12433)
**Author:** [@nqndozs](https://www.rubin.community/u/nqndozs)\ **Replies:** 3\ **Last updated:** [August 13, 2026, 4:44pm UTC](https://www.rubin.community/t/trifid-lagoon-dust-correction-cmd-issues/12433 "2026-08-13T16:44:57Z")
While creating a color magnitude diagram (CMD) for the Trifid Lagoon region in DP2 I ran into wild values after applying the dust correction to the CMD values. By applying the code seen in the 302\_2 jupyter notebook tut… --- ## [Epochal images for DP2 source](https://www.rubin.community/t/epochal-images-for-dp2-source/12358)
**Author:** [@kburdge](https://www.rubin.community/u/kburdge)\ **Replies:** 5\ **Last updated:** [August 6, 2026, 9:31pm UTC](https://www.rubin.community/t/epochal-images-for-dp2-source/12358 "2026-08-06T21:31:04Z")
Hi all, Is there a mechanism for users to request epochal images for specific sources ahead of the full DP2 release? I have a 20th mag source in the Bulge for which I would like to extract a light curve by hand. My mot… --- ## [Saturation at the central region of galaxies in deep coadd images](https://www.rubin.community/t/saturation-at-the-central-region-of-galaxies-in-deep-coadd-images/12419)
**Author:** [@Niranjana\_2002](https://www.rubin.community/u/Niranjana_2002)\ **Replies:** 4\ **Last updated:** [August 6, 2026, 6:23pm UTC](https://www.rubin.community/t/saturation-at-the-central-region-of-galaxies-in-deep-coadd-images/12419 "2026-08-06T18:23:47Z")
When i query deep coadd images from EDP2, say of M49, its center (roughly 60-100") appears to be saturated in all bands . Where as its not saturated in the pretty coadd images that is HiPS . Is there any way we can get … --- ## [Querying for visit\_detectors which overlap a given RA/Dec](https://www.rubin.community/t/querying-for-visit-detectors-which-overlap-a-given-ra-dec/12425)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 1\ **Last updated:** [August 6, 2026, 6:10pm UTC](https://www.rubin.community/t/querying-for-visit-detectors-which-overlap-a-given-ra-dec/12425 "2026-08-06T18:10:35Z")
Can I run the equivalent of this query - dataset\_refs = butler.query\_datasets("visit\_image", where="band.name = :band AND \\ visit.timespan OVERLA… --- ## [Rubin coadds on Aladin Lite?](https://www.rubin.community/t/rubin-coadds-on-aladin-lite/12416)
**Author:** [@kburdge](https://www.rubin.community/u/kburdge)\ **Replies:** 3\ **Last updated:** [August 5, 2026, 3:51pm UTC](https://www.rubin.community/t/rubin-coadds-on-aladin-lite/12416 "2026-08-05T15:51:55Z")
Hi, Quick question: are the DP2 coadds (and coadds from future releases) public, and if not, would the collaboration consider making simple color versions of them public? I ask because I contacted the Aladin team about… --- ## [Are there red leaks?](https://www.rubin.community/t/are-there-red-leaks/12385)
**Author:** [@jgizis](https://www.rubin.community/u/jgizis)\ **Replies:** 3\ **Last updated:** [August 5, 2026, 3:30pm UTC](https://www.rubin.community/t/are-there-red-leaks/12385 "2026-08-05T15:30:49Z")
I know that in ComCam DP1, there were known red (or infrared) leaks in the u and g bands. Are there any known red leaks for the DP2 datasets? In particular, in u or g? --- ## [A number of visits survey property map](https://www.rubin.community/t/a-number-of-visits-survey-property-map/12390)
**Author:** [@nsevilla](https://www.rubin.community/u/nsevilla)\ **Replies:** 2\ **Last updated:** [August 5, 2026, 2:47am UTC](https://www.rubin.community/t/a-number-of-visits-survey-property-map/12390 "2026-08-05T02:47:33Z")
Hello! We want to build some kind of footprint in healsparse that ensures that a given position has 3 or more exposures in some given bands. Is there a healsparse survey property map that includes this information? Can w… --- ## [Survey property maps extension](https://www.rubin.community/t/survey-property-maps-extension/12407)
**Author:** [@nsevilla](https://www.rubin.community/u/nsevilla)\ **Replies:** 1\ **Last updated:** [August 3, 2026, 4:58pm UTC](https://www.rubin.community/t/survey-property-maps-extension/12407 "2026-08-03T16:58:02Z")
Hello! Looking at: I see that the survey property map from Figure 2 does not cover the whole DP2 coverage from Figure 1. Is it because the survey property maps are built only on the deep coadd images tracts? Thanks --- ## [DP2 timeline after publication/release](https://www.rubin.community/t/dp2-timeline-after-publication-release/12181)
**Author:** [@nsevilla](https://www.rubin.community/u/nsevilla)\ **Replies:** 4\ **Last updated:** [July 18, 2026, 2:35pm UTC](https://www.rubin.community/t/dp2-timeline-after-publication-release/12181 "2026-07-18T14:35:36Z")
Hello! I was wondering if there was a generic timeline or estimate for transfers (‘Rucio triggers’ or otherwise) of DP2 data to IDACs and US sites once DP2 has been made public at the US DAC. Thanks for your help and al… [Next page](https://www.rubin.community/c/support/data/34.md?page=1)