kegs (kepler extra-galactic survey) brad e. tucker

KEGS (Kepler Extra-Galactic Survey)

Brad E. Tucker

The KEGS Core Team – The KEGGERS

Brad Tucker

Dan Kasen

Armin Rest Peter Garnavich

Rob Olling Ed Shaya Richard Mushostsky

Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015

Kepler

Transiting planets around bright stars

105 sq. degree field in Cygnus

~100K targets ( ~3k GO)

1 min + 30 min cadences

Only selected pixels downloaded

Monitored 500 galaxies


Supernova with Kepler – The Good

30 Minute light-curve

Continuous monitoring

Pre-Explosion

4000 Data points per SN!

Photometry ~50 - 100 ppm

Olling+ (Nature, in press)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015

Supernova with Kepler – The Bad

~4” pixels

Data downloaded 3 months late => SN already happened

Must pre-select which galaxies to monitor/download => Need to predict the future


Supernova with Kepler – The Ugly

Systematic Nightmare!


SN with Kepler

6 SN from 2010 - 2012

3 Ia’s (Olling+, Nature, in press)

2 II-P (Tucker+, Nature, in prep)

1 IIn/Ia-csm (Garnavich+, in prep)


Type Ia SN with Kepler


Type Ia Supernova Progenitors


Detecting the Donor Star


The blue object is the donor star, with the yellow shock wave and front

The donor star interferes with the ejecta from the explosion

After ~3 days the eject fills the hole creating by the donor star (b)

Kasen (2010)

Signs of the Donor Star


Most of the interaction is in the ultraviolet

t < ~5 days in B band for a Red Giant shows a significant bump

Optical bands only suffer a slight modification to their light curve rise time

Kasen (2010)

Limits on Progenitors on Ia Progenitors


Kepler Cosmology


Core-Collapse SN

Tucker+ (Nature, in prep)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015

Core-Collapse SN

Tucker+ (Nature, in prep)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015

Hydrogen Recombination

Helium Recombination

Plateau Phase

Maximum Light

Tucker+ (Nature, in prep)

Core-Collapse SN

Garnavich+ ( in prep)Brad E. Tucker Hot-Wiring the Transient Universe IV 12 May 2015

K2 Fields

Kepler 1


Campaign 4

~3000 Galaxies

7 February – 24 April 2015


Campaign 5

2800 Galaxies

26 April – 11 July 2015


Fast and Faint

Image Credit : Mansi Kasliwal

KEGS


Active Galactic Nuclei

Mushotzky+11

~3% of galaxies low level AGN

Sensitivity ~0.01%

Aiming to find 300 – 500 new AGN

QSO’s Too


KEGS Plan + Goals

2 – 3 Fields per year (Galactic Cap Fields), 3-5K galaxies per field

3 – 10 SN per field, SN Shock break-out + subtle features

Fast, faint transients

AGN, QSO’s

Improving cosmological samples

Need Ground Based Follow-up to type objects

Talk to me if you’re thirsty for data and want some KEGS


kegs (kepler extra-galactic survey) brad e. tucker

Documents

tucker slide

transient universe

prep brad

prep slide

press brad

p tucker

galaxies brad

future brad