[ Previous | Next | ADS ]

iPTF discovery and identification of bright transients

ATel #10038; Thomas Kupfer, Anna Ho (California Institute of Technology), Emir Karamehmetoglu, Tanja Petrushevska (The Oscar Klein Centre), Scott Adams, James D. Neill, Richard Walters, Chris Cannella, Nadejda Blagorodnova, Lin Yan, Shri Kulkarni (California Institute of Technology)
on 2 Feb 2017; 04:06 UT
Credential Certification: Thomas Kupfer (tkupfer@caltech.edu)

Subjects: Optical, Supernovae, Transient

The intermediate Palomar Transient Factory (ATel #4807) reports the discovery of the following bright transients. We report as ATel alerts all objects brighter than 19 mag. Our discoveries are reported in two filters: sdss-g and Mould-I, denoted as g, and I. Both are in the AB magnitude system. All magnitudes are obtained using difference image photometry based on the PTFIDE pipeline described in Masci et al. 2016.

Our automated candidate vetting to distinguish a real astrophysical source (1.0) from bogus artifacts (0.0) is powered by three generations of machine learning algorithms:) RB2 (Brink et al. 2013MNRAS.435.1047B), RB4 (Rebbapragada et al. 2015AAS...22543402R), and RB5 (Wozniak et al. 2013AAS...22143105W). See ATel #7112 for additional details.

For a subset of transients, we have obtained follow-up observations with the Spectral Energy Distribution Machine (SEDM) (range 350-950nm, spectral resolution R~100) mounted on the Palomar 60-inch (P60) telescope. The approved classification (and/or subsequent) spectra are made publicly available through WISeREP (Yaron & Gal-Yam 2012).

 
Name      | RA (J2000)  | Dec (J2000)  | Discovery date | Discovery mag | Latest date   | Latest mag | Redshift | Classificiation | Classification Date | Notes 
----------|-------------|--------------|----------------|---------------|---------------|------------|----------|-----------------|---------------------|------ 
iPTF17aan | 07:39:26.28 | +13:55:09.76 | 2017-02-01.46  | 17.92 (g)     | 2017-02-01.32 | 17.92 (g)  |          |                 |                     |       
iPTF17wm  | 06:30:52.76 | +73:27:31.45 | 2017-01-29.05  | 18.96 (g)     | 2017-01-31.22 | 19.02 (g)  |          |                 |                     |       
iPTF17wr  | 05:02:44.91 | +75:01:44.60 | 2017-01-29.05  | 18.58 (g)     | 2017-01-31.21 | 18.43 (g)  |          |                 |                     |       
iPTF17wj  | 07:24:08.95 | +39:51:43.64 | 2017-01-29.04  | 19.15 (g)     | 2017-01-31.27 | 19.77 (I)  | 0.051    | SN Ib           | 2017-02-01.04       |