A Fully Automated Integral Field Spectrograph Pipeline for the SEDMachine: pysedm. (arXiv:1902.08526v1 [astro-ph.IM])
<a href="http://arxiv.org/find/astro-ph/1/au:+Rigault_M/0/1/0/all/0/1">M. Rigault</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Neill_J/0/1/0/all/0/1">J. D. Neill</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Blagorodnova_N/0/1/0/all/0/1">N. Blagorodnova</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dugas_A/0/1/0/all/0/1">A. Dugas</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Feeney_M/0/1/0/all/0/1">M. Feeney</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Walters_R/0/1/0/all/0/1">R. Walters</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Copin_Y/0/1/0/all/0/1">Y. Copin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Brinnel_V/0/1/0/all/0/1">V. Brinnel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fremling_C/0/1/0/all/0/1">C. Fremling</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nordin_J/0/1/0/all/0/1">J. Nordin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sollerman_J/0/1/0/all/0/1">J. Sollerman</a>

Current time domain facilities are discovering hundreds of new galactic and
extra-galactic transients every week. Classifying the ever-increasing number of
transients is challenging, yet crucial to further our understanding of their
nature, discover new classes, or ensuring sample purity, for instance, for
Supernova Ia cosmology. The Zwicky Transient Facility is one example of such a
survey. In addition, it has a dedicated very-low resolution spectrograph, the
SEDMachine, operating on the Palomar 60-inch telescope. This spectrograph’s
primary aim is object classification. In practice most, if not all, transients
of interest brighter than ~19 mag are typed. This corresponds to approximately
10 to 15 targets a night. In this paper, we present a fully automated pipeline
for the SEDMachine. This pipeline has been designed to be fast, robust, stable
and extremely flexible. pysedm enables the fully automated spectral extraction
of a targeted point source object in less than 5 minutes after the end of the
exposure. The spectral color calibration is accurate at the few percent level.
In the 19 weeks since pysedm entered production in early August of 2018, we
have classified, among other objects, about 400 Type Ia supernovae and 140 Type
II supernovae. We conclude that low resolution, fully automated spectrographs
such as the `SEDMachine with pysedm’ installed on 2-m class telescopes within
the southern hemisphere could allow us to automatically and simultaneously type
and obtain a redshift for most (if not all) bright transients detected by LSST
within z<0.2, notably potentially all Type Ia Supernovae. In comparison to the current SEDM design, this would require higher spectral resolution (R~1000) and slightly improved throughput. With this perspective in mind, pysedm has been designed to easily be adaptable to any IFU-like spectrograph (see https://github.com/MickaelRigault/pysedm).

Current time domain facilities are discovering hundreds of new galactic and
extra-galactic transients every week. Classifying the ever-increasing number of
transients is challenging, yet crucial to further our understanding of their
nature, discover new classes, or ensuring sample purity, for instance, for
Supernova Ia cosmology. The Zwicky Transient Facility is one example of such a
survey. In addition, it has a dedicated very-low resolution spectrograph, the
SEDMachine, operating on the Palomar 60-inch telescope. This spectrograph’s
primary aim is object classification. In practice most, if not all, transients
of interest brighter than ~19 mag are typed. This corresponds to approximately
10 to 15 targets a night. In this paper, we present a fully automated pipeline
for the SEDMachine. This pipeline has been designed to be fast, robust, stable
and extremely flexible. pysedm enables the fully automated spectral extraction
of a targeted point source object in less than 5 minutes after the end of the
exposure. The spectral color calibration is accurate at the few percent level.
In the 19 weeks since pysedm entered production in early August of 2018, we
have classified, among other objects, about 400 Type Ia supernovae and 140 Type
II supernovae. We conclude that low resolution, fully automated spectrographs
such as the `SEDMachine with pysedm’ installed on 2-m class telescopes within
the southern hemisphere could allow us to automatically and simultaneously type
and obtain a redshift for most (if not all) bright transients detected by LSST
within z<0.2, notably potentially all Type Ia Supernovae. In comparison to the
current SEDM design, this would require higher spectral resolution (R~1000) and
slightly improved throughput. With this perspective in mind, pysedm has been
designed to easily be adaptable to any IFU-like spectrograph (see
https://github.com/MickaelRigault/pysedm).

http://arxiv.org/icons/sfx.gif