Welcome to the March 18th SMWLV-TVS Cadence Hack Day!
Thursday, March 18th, 2021
“Morning:” 10:00am- 12:00 Noon EDT
“Afternoon:” 1:00 - 3:00pm EDT
Hosted on Gathertown: click here to enter
Passcode: smwlvtvs
Meeting homepage: this Community Post
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The two sessions are identically scheduled - attend as much or as little as you like!
SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Anticipated observing strategy hack days
Goal: help ensure the community provides the Rubin Observatory with our cadence input by the April 15th deadline. Anticipated (in Feb) sequence w/ suggested foci:
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
“Morning” schedule (from this doc)
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“Morning” session: 10:00am - 12:00 Noon EDT Thurs Mar 18 (all times EDT) | |
10:00 - 10:05 am | Participants assemble: log in to Gathertown, go to the “SMWLV” room |
10:05 - 10:15 am | Welcome: breakout room sign-up |
10:15 - 10:45 am | Hack session 1 part 1 |
10:45 - 11:15 am | Plenary: investigations in progress (see the Slides) |
11:15 - 11:50 am | Hack session 1 part 2 |
11:50 am - 12:00 Noon | Groups encouraged to write TODOs and issues into the plenary slide deck |
We’ll stay in Gathertown for the plenary unless more than about 15 people are present.
SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
“Afternoon” schedule (from this doc)
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“Afternoon” session: 1:00 pm - 3:00 pm EDT Thurs Mar 18 (all times EDT) | |
1:00 - 1:05 pm | Participants assemble: log in to Gathertown, go to the “SMWLV” room |
1:05 - 1:15 pm | Welcome: breakout room sign-up |
1:15 - 1:45 pm | Hack session 2 part 1 |
1:45 - 2:15 pm | Plenary: investigations in progress (see the Slides) |
12:15 - 2:50 pm | Hack session 2 part 2 |
2:50 - 3:00 pm | Groups encouraged to write TODOs and issues into the plenary slide deck (the slide with the pink background below) |
We’ll stay in Gathertown for the plenary unless more than about 15 people are present.
SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Objectives for this Hack Day:
Comments for item 2:
* The SCOC solicitation for cadence notes can be found here.
Links to the lists of planned cadence notes thus far: (SMWLV , TVS)
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summaries of investigations in progress
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Our mid-session plenary today will consist of short one-slide descriptions of the cadence investigation(s) under way by participants.
Template slides (green background) follow (slide ~14 onward): if no blank templates are available, just duplicate the template slide and complete as needed.
(This likely will not form a complete set of the investigations underway - there are far too many for that, see e.g. the TVS and SMWLV planned cadence notes - but to help you solicit help or to find investigations that interest you and to contribute.)
SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Resources
(See also the Community thread for this workshop. The community thread for hack day 1 also has useful discussion.)
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Example specification: short exposures and saturation
An example specification document is available at this link. It specifies a high-level “Figure of Merit” (FoM) in terms of a single number. This FoM is in turn described in terms of “Metrics” - quantities evaluated for each spatial location (“Healpix”) using the MAF framework.
Templates of this specification are provided as a resource to help groups get started translating their science cases into Figures of Merit, at the hack day 3 breakout room signup page. Feel free to {use / edit / copy / modify / ignore completely}.
The templates are public, which means everyone can see each other’s specifications (useful for e.g. determining overlapping science cases).
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Organizing the breakout rooms
To propose a topic for a breakout room, please use the hack day III breakout room signup page (time will be provided after this plenary).
(A suggested plan will be be input based on the sign-up sheet, but you should feel free to edit this.)
During the session, you should be able to move between rooms at will. That said, if you do participate in a breakout room, it will be helpful if you can write your name in the “participants” column so that we know who contributed work.
At the end of the session, groups will be invited to comment on any issues or difficulties encountered.
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Breakout room “locations”
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Communication
This meeting:
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summaries of investigations in progress
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Our mid-session plenary today will consist of short one-slide descriptions of the cadence investigation(s) under way by participants.
Template slides (green background) follow (slide ~14 onward): if no blank templates are available, just duplicate the template slide and complete as needed.
(This likely will not form a complete set of the investigations underway - there are far too many for that, see e.g. the TVS and SMWLV planned cadence notes - but to help you solicit help or to find investigations that interest you and to contribute.)
(Will update: shortly before the afternoon plenary session, I will re-order the slides so that those not discussed in the morning session go first.)
(If you have prepared a slide in powerpoint on your computer, you can upload it to the following public google drive folder: hackday3_powerpointSlidesINBOX )
SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Young stars and their variability
Who’s working on this: Sara Bonito, Laura Venuti, Mario Guarcello, Loredana Prisinzano, Francesco Damiani, Keivan Stassun, John Gizis
One-line summary: a week long run of 10 hours per night with observations every 30 min each year on Carina Nebula with g, r, i (u) filters
Science area(s): variability of young stars; discriminate accretion bursts, rotation, dip for warp disk, …, from the light curves
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): specified
Immediate next task: Implement figure of merit in Jupyter notebook, using previous developed notebooks on light curves and variability (e.g. transients, TDEs, ...)
Anticipated challenges / upcoming decisions: What (if any) challenges remain? Are there any capabilities you need to obtain before you can implement your figure of merit or conduct your investigation?
Challenges solved: What accomplishments have you already made towards your goal? This is a good place to advertise any advances you have made that you think others will benefit from.
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Galactic Plane coverage for Star Forming Regions
Who’s working on this: Sara Bonito, Loredana Prisinzano, Francesco Damiani, Laura Venuti, Mario Guarcello, John Gizis, Keivan Stassun
One-line summary: Uniform cadence over 10 years (WFD) , g, r, i (u) filters in the Galactic Plane (|b|<5 deg)
Science area(s): mapping star forming regions in the Galaxy; young stellar objects, EXor and FUor objects
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): prototyped
Immediate next task: Implement figure of merit in Jupyter notebook, already partially developed (to be improved including appropriate star formation density )
Anticipated challenges / upcoming decisions: Estimate the total number of stars with t<10Myr, mass M>0.3 Msun in the Galactic Plane. Working on this challenge to provide appropriate function in the Jupyter notebook to implement figure of merit (by Peter Yoachim)
Challenges solved: Estimate the maximum distance to detect stars down to 0.3 Msun assuming WFD observing strategy. Estimate the related star volume. Trying to convert this star volume into total number of young stars in the Gal. Plane
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Develop Alternative Galactic Plane Footprints
Who’s working on this: Rachel Street
One-line summary: Develop ~3 footprints (inclusive, medium, minimum-viable) in the Galactic Plane which highlight regions of highest scientific value.
Science area(s): Galactic transients and variables
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): Idea
Immediate next task: Debugging and expanding implementation
Anticipated challenges / upcoming decisions: Refreshing familiarity with MAF; find the most constructive way to provide the MAF team with [good / acceptable / bad] evaluation
Challenges solved:
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Studying Local Volume galaxies with resolved stellar populations
Who’s working on this: Jeff Carlin, Knut Olsen, Leo Girardi
One-line summary: We want to ensure that the necessary depth (in at least 2 filters), image quality (for star/galaxy separation and identifying globular clusters), crowded-field photometry, and the overall WFD footprint are not hampering resolved-star science that can be done with/near LV galaxies.
Science area(s): Resolved stellar populations, dwarf galaxies, tidal substructures, crowded field photometry.
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): specification in progress -- ideas welcome. Specification at this link: cadenceFoM_LocalVolume
Immediate next task: Need to turn the ideas into a figure of merit.
Anticipated challenges / upcoming decisions: Need to decide on the main capability to be captured in a FOM. Define what surface brightness/crowding limit we need to reach. Learn how to use MAF!
Challenges solved:
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Short exposures Figure of Merit
Who’s working on this: Will Clarkson, John Gizis, Loredana Prisinzano, Sara Bonito, Mario Guarcello
One-line summary: Total survey area with sufficiently bright saturation limit
Science area(s): Observations of bright or foreground objects; stellar populations behind a bright foreground population
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): specified
Immediate next task: Implement figure of merit in Jupyter notebook, edited from an example notebook in the SMWLV-Metrics Github repository.
Anticipated challenges / upcoming decisions: Is a single apparent magnitude each for bright / faint limit in each filter sufficient?
Challenges solved: Class that estimates the saturation limit for each observation [written by Peter Yoachim]
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Confusion-limited legacy survey
Who’s working on this: Will Clarkson, Knut Olsen, your name here
One-line summary: In crowded regions, LSST should produce a template image, constructed of at least four images in good seeing, that reaches the confusion limit for 0.55 arcsec seeing. This forms a confusion-limited legacy image set.
Science area(s): Microlensing, stellar populations, planetary nebulae, any future reduction requiring a high-spatial-resolution template image / truth table
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): idea
Immediate next task: Need to translate the goal into a specification, then implement it as a notebook.
Anticipated challenges / upcoming decisions: How do we judge whether observations in a particular field are sufficient to make a useful legacy image in crowded regions? Here is a possible proxy: count the fraction of the sky for which:
Challenges solved: N/A
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: [Fe/H] precision for (red clump stars)
Who’s working on this: Massimo Dall’Ora, Annalisa Calamida, Mike Rich, Will Clarkson, Mario Guarcello, Peter Yoachim, Sara Bonito, Loredana Prisinzano
One-line summary: Photometric [Fe/H] uncertainty estimated from (u-i) color uncertainty using relations in Section 4.3.2. of Christian Johnson et al. 2020 MNRAS 499, 2357
Science area(s): Stellar populations
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): partly specified; incomplete draft specification is here: cadenceFoM_stellarMetallicity
Immediate next task: Draft a first-order notebook by dissection of bd_distance_metric?
Anticipated challenges / upcoming decisions: It would be best to also determine the uncertainties on Teff & E(B-V) from LSST photometry, as a function of observing strategy. Is it practical to implement these important additional tests by April 15? Some discussion on this and other issues can be found in the draft specification above. Perhaps broaden to include other stellar tracers? (E.g. pulsators? Literature has other photometric metallicity estimators, e.g. F- G-class stars, in which case (u-g) color. (Note: not just the bulge!)
Challenges solved:
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: A Detailed census of variables and transients in the Magellanic Clouds
Who’s working on this: Knut Olsen, Ilaria Musella, Vincenzo Ripepi, Marcella Marconi, Marcella Di Criscienzo, Mario Giuseppe Guarcello
One-line summary: Developing a figure of merit to cover a broad set of variable and transient populations in the Magellanic Clouds
Science area(s): Stellar populations, variable stars, microlensing, supernovae (through light echoes), ISM, star formation.
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): specified/prototyped/partially implemented/partially run on opsims.
Immediate next task: Derive figure of merit based on Nvisits and some measure of timing, justify through exploration of additional variable populations
Anticipated challenges / upcoming decisions: Will need to limit the number of populations that we explore
Challenges solved: Nice investigation of RR Lyrae period and light curve shape metrics by Marcella Di Criscienzo
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: A 3-D Map of the Magellanic System
Who’s working on this: Knut Olsen, Leo Girardi, Adriano Pieres, ...
One-line summary: Evaluating ability to detect faint structures in the periphery of the Magellanic Clouds, use RR Lyrae to trace 3-D geometry
Science area(s): Stellar populations, dwarf galaxies, streams
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): Mostly specified.
Immediate next task: Complete specification
Anticipated challenges / upcoming decisions: Implementing sketched out metrics
Challenges solved: Basic technique of identifying LSB structure is well documented
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Cataclysmic Variables cadence�[David Buckley, Paula Szkody, Hanno Marais, Retha Pretorius, Patrick Woudt...]
We aim to investigate what the optimal survey strategy would be for CVs & related objects (incl. Novae), taking into account the various sub-classes and their out-burst & variability timescales
PLOT
Dwarf Nova in CRTS:
Infrequent high amplitude outbursts
Magnetic CV in CRTS:
variable accretion states
One-slide summary: Variability of Blazars [live notes from discussion]
Who’s working on this: Claudia M. Raiteri, Maria Isabel Carnerero Martin,, … , Sara Bonito
One-line summary: Blazar lightcurve recovery
Science area(s): AGN variability
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): prototyping - started the implementation. Testing metrics (transientASCII, Saturation limits...).
Immediate next task: What do you intend to do next for this figure of merit or investigation?
Anticipated challenges / upcoming decisions: Can existing metrics be applied to Blazar variability at these timescales? Bright limit applies? (Some interaction with young stars but are different regimes). Saturation will likely be a key issues. Some overlap with SN detection: revisit time likely important… already know that 2x15s better than 1x30s.
Challenges solved: What accomplishments have you already made towards your goal? This is a good place to advertise any advances you have made that you think others will benefit from.
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
(Template slides for specifications follow)
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Your investigation here
Who’s working on this: Who has expressed an interest in this investigation?
One-line summary: What investigation are you doing?
Science area(s): Indicate science areas your work will be relevant to.
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): pick one or write your own.
Immediate next task: What do you intend to do next for this figure of merit or investigation?
Anticipated challenges / upcoming decisions: What (if any) challenges remain? Are there any capabilities you need to obtain before you can implement your figure of merit or conduct your investigation?
Challenges solved: What accomplishments have you already made towards your goal? This is a good place to advertise any advances you have made that you think others will benefit from.
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
One-slide summary: Your investigation here
Who’s working on this: Who has expressed an interest in this investigation?
One-line summary: What investigation are you doing?
Science area(s): Indicate science areas your work will be relevant to.
Status ( idea / specified / prototyped / implemented / run on opsims / output analyzed / cadence note drafted): pick one or write your own.
Immediate next task: What do you intend to do next for this figure of merit or investigation?
Anticipated challenges / upcoming decisions: What (if any) challenges remain? Are there any capabilities you need to obtain before you can implement your figure of merit or conduct your investigation?
Challenges solved: What accomplishments have you already made towards your goal? This is a good place to advertise any advances you have made that you think others will benefit from.
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Miscellaneous resources / scratchspace for sharing notes, figures
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
TODOs arising from Hack Day 3 (Thurs March 18)
Please indicate here any actions you have identified for yourself or your group arising from this hack day.
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Slides not used in this session / kept from previous hack days
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Issues and TODOs arising from Hack Day 2: “Morning”
To be entered by participants after their hack session
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Issues and TODOs arising from Hack Day 2: “Morning”
To be entered by participants after their hack session
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
Issues and TODOs arising from Hack Day 2: “Afternoon”
To be entered by participants near the end of their hack session. Please also indicate your name so that others know who to work with.
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
(For reference, here are the specifications from the Feb 18th hack day)
(Can also be found in the breakout rooms page)
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Specification doc | Lead author (if known) |
Sara Bonito | |
Sara Bonito | |
John Gizis | |
(Will Clarkson) | |
Knut Olsen | |
Will Clarkson |
SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
[Some discussion notes from Thurs Feb 18]
Notes from initial discussion - what to work on:
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SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021
[Comment from Feb 18th slides]
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[Comment from Peter Yoachim:]
For folks interested in defining a population of objects and then seeing how well they are observed, the microlensing metric is a good example.
Source code here: https://github.com/LSST-nonproject/sims_maf_contrib/blob/master/mafContrib/microlensingMetric.py
Example notebook running it here: https://github.com/LSST-nonproject/sims_maf_contrib/blob/master/science/Transients/Microlensing.ipynb
This should be easy to modify to other populations (say, brown dwarf stars, Cepheid Variables, whatever). Just define your spatial distribution, then define your detection criteria, and you’re good to go.
SMWLV-TVS: Cadence Hack Day, Thurs March 18th, 2021