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| META TOPICPARENT |
name="AGNTDEWorkingGroup" |
GROWTH Marshal Scanning Schedule |
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- M: Sjoert, T: Brad, W: Suvi, Th: Nadia, F: Charlotte, Sat: Sara, Sun: Tiara
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- M: Sjoert, T: Sara, W: Suvi, Th: Erica, F: Charlotte
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< | GROWTH Marshal Scanning Philosophy |
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> | GROWTH Marshal TDE Scanning |
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GROWTH Marshal Candidate Scanning Saving Philosophy (no longer used) |
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- save any "real" nuclear transient: AGN, TDE, nuclear SN
- remove any variable stars as "stellar"
- don't save faint sources with non detections between detections, but don't remove them as "bogus" until you are sure they are bogus. they will show up again on the scanning page on a later day if they persist and are real.
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| | GROWTH Marshal wish list
- add a histogram of distnr values from all the alert packets to the Marshal page.
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- manually add new sources to the Marshal, including the light curve, by uploading an .avro package (or via the ZTF name, but .avro uploads should be more easy to implement?).
- automatically push new sources to the Marshal by supplying .avro or .json data (ie, from an Ampel T3 module).
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- have a way to link to the scanning page view of the alert packets for a scanned transient.
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- be able to add a saved transient to a science program from the Marshal page.
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- have information on the number of alerts generated ingested in a night and how many got through your filter.
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- indicate (or remove) photometry from Ref-Science (ie, isdiffposs=0); update: looks like this is fixed for more recent alerts.
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lower priority, but still nice to have: |
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- option to classify a source without uploading a spectrum (eg, spectroscopic AGN from SDSS). Note, we can also do this by uploading new info in
list_program_sources.cgi, which is the preferred method for bulk annotations.
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- import SDSS (host) spectrum automatically
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- show SDSS (or PS1 if outside footprint) thumb in Program Reports. This makes it easier to identify your fav transient (perhaps safe the thumb image instead of reloading each time).
- add button that links to the ASASSN light curve tool,
https://asas-sn.osu.edu/?days=300&declination=99.9&ra=99.9
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< | Properties |
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> | Properties (note, this was written prior to the start of ZTF) |
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Below a list of properties that can be used for TDE identification. Feel free to add more items to the list. |
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- variability of the host before the flare (using ZTF PSF data, or perhaps PS1)
- no host / orphan source
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< | Channels designed for discovery of TDEs |
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> | Channels designed for discovery of TDEs (note, this was written prior to the start of ZTF) |
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A channel can be created by filtering both a single property or a combination of properties. The output of the channels below is follow-up observations. This follow-up will become a property that can be fed to other channels. |
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Some example AMPEL channels are available on the AMPEL commissioning page , and a list of variables that can be used in AMPEL filters is given on the AMPEL Variables Page. |
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< | SEDm TDEs
- Steward: Tiara
- Goal: Early follow-up with moderate contamination, complete for m_g<18.5
- Description: Strict TDE selection; similar to iPTF search.
- Facilities: SEDm
- Code: inside the Marshal, also see code below (might be replaced by Ampel filter once the Marshal accepts auto uploads).
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| | Fainter and near peak
- Steward: Sjoert
- Goal: Remove SNe Ia. Similar to SEDm selection, but to a fainter magnitude limit. Can either trigger u-band or spectroscopy at telescopes bigger than 60-inch.
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- Description: Nuclear
and Blue flare and large amplitude and near peak
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- Description: Nuclear and Blue flare and large amplitude and near peak
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- Facilities: DCT, friends at larger telescopes
- Code: Ampel filter developed in private git repro, contact Sjoert to get access.
Late identifications
- Steward: Sjoert
- Goal: Completeness! Make sure we get a spectrum if the flare didn't pass the strict cuts near peak, but turns out to be a good candidate when more data comes in.
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- Description: nuclear
and constant color. But no requirement on host color. Less strict requirements on flare color.
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- Description: nuclear and constant color. But no requirement on host color. Less strict requirements on flare color.
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- Facilities: SEDm or spectrograph at larger telescope; Swift.
- Code: Ampel filter. No started yet. Need iPTF data to test how well this idea will work.
Low mass host galaxy or orphan TDEs
- Steward: Sjoert
- Goal: Make sure TDEs in low mass galaxies are not missed (eg, because galaxy center is harder to measure).
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- Description: Blue
and constant color. Orphan flare or host galaxy mass < 1e10 Msun. Less strict requirement on offset from host (eg, 1").
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- Description: Blue and constant color. Orphan flare or host galaxy mass < 1e10 Msun. Less strict requirement on offset from host (eg, 1").
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- Facilities: Swift, optical spectroscopy
- Code: not yet, we first need PS1 photoz T2 module
High mass host galaxy
- Steward: Sjoert
- Goal: Find more sources like ASASSN-15lh
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- Description: Host galaxy mass >1e11
and nuclear flare
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- Description: Host galaxy mass >1e11 and nuclear flare
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- Facilities: Get optical spectrum
- Code: not yet, we first need PS1 photoz T2 module
Post-starburst host galaxy
- Steward: Sjoert
- Goal: Completeness for flares from host galaxies that are known to overproduce TDEs.
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- Description: E+A host spectrum
or high compactness (cf. the Law-Smith and Graur papers).
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- Description: E+A host spectrum or high compactness (cf. the Law-Smith and Graur papers).
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- Facilities: Optical spectrum; Swift
- Code: not yet, we need some good catalogs
Large AGN flares / Changing look
- Steward: Sara
- Goal: Find extreme AGN
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- Description: AGN with spectrum
and very large amplitude (delta m>1)
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- Description: AGN with spectrum and very large amplitude (delta m>1)
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- Facilities: Swift?
- Code: Ampel
TDEs in AGN
- Steward: Sara & Sjoert ?
- Goal: Try to find TDEs in AGN
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- Description: AGN
and large flare and BH mass < 1e8 and photometric TDE properties
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- Description: AGN and large flare and BH mass < 1e8 and photometric TDE properties
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- Facilities: depends on how bright the AGN is
- Code: not yet, first need to make AGN flares
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- Description: TDE identification based on optical spectrum; within few weeks from peak
- Facilities: VLA proposal (PI: van Velzen)
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< | GROWTH Marshal ZTF Science Validation Filter |
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> | GROWTH Marshal ZTF Science Validation Filter (not actively used, replaced by Ampel NuclearTransient filter) |
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bright = False; |
| | -- SjoertVanVelzen - 09 Feb 2018
-- RobertStein - 21 Feb 2018
\ No newline at end of file |
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-- SjoertVanVelzen - 10 Feb 2020 |
Copyright © 2008-2025 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.