Team Leaders: Kate Maguire (QUB ; from 1/9/2014)
Team members - revised list : Andrea Pastorello (INAF-OAPd; was TAT leader until 1/9/2014), Joe Anderson (ESO Chile), Maria Teresa Botticella (INAF-Capodimonte), Regis Cartier (Southampton), (Janet) Ting-Wan Chen (MPE), Annalisa De Cia (ESO Garching), Michel Dennefeld (IAP, Paris), Nancy Elias-Rosa (INAF-OAPd), Morgan Fraser (IoA, Cambridge), Lluís Galbany (Pittsburgh), Cosimo Inserra (QUB), Joe Lyman (Warwick), Stephen Smartt (QUB), Mark Sullivan (Southampton), Stefan Taubenberger (ESO Garching, MPA).
Information on selection of the Target and Alert Team for ePESSTO runs:
The dates of upcoming observing runs are available here: Observing Runs A request email for volunteers will be sent by the TAT chair to alerts_@_pessto.org approx. one week prior to the start of the next observing run (generally made up of three subruns). Responses received by email within 24 hours will be included for consideration in the TAT schedule. Note: requests for inclusion in the TAT for future observing runs are also possible in advance of this email by emailing the TAT chair, Kate Maguire (kate.maguire_@_qub.ac.uk) with details of your availability. Preference will be given to people who haven't served in the TAT recently (if they so wish).
Note (20170407): Additional information to appear shortly for newcomers on TAT duties and tips and tricks for the different surveys.
The Marshall is the interface through which targets are compiled from the feeder surveys, scheduled for classification, classifications are added and follow-up scheduling is overseen.
Bugs & improvement/development requests can be reported via the 'bug' symbol on the right hand side of the top menu bar on the Marshall - this takes you to the github issues page)
The aim of the TAT is to identify suitable targets for spectroscopic classification with ePESSTO during an upcoming observing subrun. Discovery information from feeder surveys is ingested by the Marshall and appears firstly in the 'Inbox'. The duty of the TAT is to prioritise the targets appearing in the inbox in the days leading up to an observing subrun.
Usually the TAT is most active in the days preceding observing nights and one to two days before the start of the subrun. Scheduling of targets for classification (adding them to the 'classification targets' queue) is best done no more than one to two days before the start of the observing subrun. This is because otherwise objects can be added for classification for which more data appears that makes them less interesting and then have to be downgraded but can sometimes be missed. Generally it is fine to 'snooze' objects (see below) well in advance of the subrun because these objects will reappear in the inbox if further information is obtained.
A general (but not-exhaustive) strategy for a TAT member on duty would be to go through the inbox and ask a number of initial questions about each target:
If it appears likely to be a true extragalactic transient then the criteria defined in Section 2 below can be applied to determine the priority.
The snooze button is there to be used for objects where their current light curve evolution is unclear or they are currently too faint for an NTT classification spectrum (>20.5 mag). Snoozing an object means that it is removed from the inbox and placed in the 'snoozed' list. When an additional light curve point becomes available that shows the transient to be rising, the object is automatically added back into the inbox for reevaluation by the TAT team on duty.
To be updated to align with ePESSTO science groups. Light curve properties for ePESSTO science targets to be included here: LC properties Old version here: (Criteria for selecting targets for classification up to mag 20.5) For nearly all transient events that fall into an ePESSTO science group, our aim is to observe as soon as possible after explosion. In most cases (with some notable exceptions), old declining transients are not of interest to us.
Targets that are suitable for classification are added to the 'classification queue' using the top button on the righthand side of the target. A comment should be included describing why it is of interest (or not) e.g 'Offset from z=0.005 galaxy. Deep non-detection three days ago and rising over past two nights. Currently -16 mag. High priority. ' The priority of the target is assigned on the 'classification queue using the 'flame' symbol dropdown menu on the righthand side of the target ('high', 'medium' or 'low'). 'High priority' for classifications should be reserved for the youngest, brightest, faintest, etc. transients to make it easier for the observers to prioritise during the night.
Survey specific tips:
Once approved, science targets can be added to the 'follow-up targets' list on the Marshall. The P.I. is responsible for scheduling follow-up observations. All requests and their details should be entered via the Marshall (not via email!) including a recent estimate of the magnitude of the target. Details on typical exposure times are available at: OBs information Since SOFI spectroscopy is very time-consuming, requests for follow-up SOFI spectra must be made to the Survey P.I., the Science Board chair and the TAT chair with justification of the science case.
There are three classes of priority for follow-up: (i) CRITICAL, (ii) IMPORTANT, and (iii) USEFUL. There has been an overuse of 'critical' in the past, this should only be used when the resulting publication is expected to significantly suffer for the lack of these data. Once the data have been obtained or the time period of the request expires, the priority will be reset to 'NONE'.
It is PESSTO policy that optical light curves should not be obtained with the NTT unless the target is too faint for smaller facilities (e.g. fainter than >21 mag). It is the responsibility of the Science PI of each follow-up target to organise the light curve coverage, which should be in place (at least in principle) before PESSTO spectroscopic follow-up commences.
GROND (2.2m, g'r'i'z'JHK simultaneously, unusual SNe, PI: Ting-Wan Chen)