Title: Robert%20P.%20Kirshner,%20Peter%20Challis,%20Tom%20Matheson,%20Malcom%20Hicken%20(CfA)
1Supernovae at the CfA Current Samples and
Applications
- Robert P. Kirshner, Peter Challis, Tom Matheson,
Malcom Hicken (CfA) - Saurabh Jha (UC Berkeley)
- Peter Garnavich (Notre Dame)
2MOUNT HOPKINS, ARIZONA
3Supernovae in the IAU Circulars
KAIT
SCP
4Spectroscopy at Mount Hopkins
FLWO 1.5-m Tillinghast reflector
FAST spectrograph
Three or four spectra per night, 300 spectra
per year
Reliable service observers on site
5Capability of Spectrograph
SN with R 19.8 mag
6Recent Examples
7Classification of Supernovae
560 nearby (low-z) SNe discovered in last three
years
495 have spectroscopic classifications
Mt. Hopkins program responsible for 195 (39!)
Spectra available on CfA web page
Email alerts to immediately disseminate
information
http//cfa-www.harvard.edu/cfa/oir/Research/supern
ova/RecentSN.html
8Spectroscopy Results SN 2001V
9Spectroscopic Database
- 387 Type Ia Spectra for SNe with calibrated light
curves - Epoch of spectra ranges from 14 days to several
months past maximum - 201 spectra from day 14 to day 14
- ?m15 range 0.85 ? 1.93
- All galaxy types
- Once photometry complete, spectroscopic sample
will double - All spectra from same instrument/telescope
combination - All spectra reduced in same manner
- Systematics for comparison are reduced
10Spectroscopic Database Distribution by Age
11Spectroscopy Results SN 1998aq
12Spectroscopy Results SN1998aq
SYNOW fit at day -9
13Spectroscopy Results SN1998aq
SYNOW fit at day 0
14Spectroscopic Database--Heterogeneity
15Spectroscopic Database Day 10
16Spectroscopic Database Day 0
17Spectroscopic Database Day 10
18Spectroscopy Results SN 1999by
Effect of titanium strength on the spectrum
19Spectroscopic Database Titanium
Bright, Slow Dim, Fast
20Spectroscopy Results SN 1999gi
Leonard et al. 2002
21Photometry at Mount Hopkins
FLWO 1.2-m reflector
4shooter camera
11' X 11' per chip
One SN per night in UBVRI
One night per dark run for photometric
calibration, templates,etc.
Service observing during scheduled programs
22Capability of CCD Camera
SN 2001V, discovered at FLWO Good U-band Response
23IR Photometry at Mt. Hopkins
Jha et al. 1999
FLWO 1.2-m Reflector with Stelircam
One SN per night in JHK
Service observing during scheduled programs
2Mass Camera and Telescope coming soon Josh Bloom
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25A Couple of UBVRI Light Curves...
SN 2001V in NGC 3987
SN 1998bu in M 96
26Even More Photometry Results
Jha et al. 1999
27A Unique Data Set
U-band composite light curve
28Measuring distances MLCS2k2
29MLCS2k2 Templates
30Extinction Zeropoint
31Hubble-Flow SNe Ia
80 SNe Ia with cz 2500 km/s in CMB frame
one parameter fit aV log cz - 0.2mV0 aV
0.6838 0.0045 (random) 0.0120 (systematic)
32Measuring the Hubble Constant
33Cepheid-Calibrated SNe Ia
80 SNe Ia with cz 2500 km/s in CMB frame
same supernova data! same Cepheid data!
34Going with the Flows
35ESSENCEEquation of State SupErNovae Trace
Cosmic Expansion
36ESSENCE Survey Team
Bruno Leibundgut --- European Southern
Observatory Weidong D. Li --- UC Berkeley
Thomas Matheson --- Harvard-Smithsonian CfA
Anthony Miceli --- Univ of Washington
Gajus Miknaitis --- Univ of Washington
Armin Rest --- Univ of Washington/CTIO Adam
G. Riess --- Space Telescope Science Institute
Brian P. Schmidt --- Mt. Stromlo Siding
Springs Observatories Chris Smith ---
CTIO/NOAO Jesper Sollerman --- Stockholm
Observatory Jason Spyromilio --- European
Southern Observatory Christopher Stubbs ---
Harvard-Smithsonian CfA Nicholas B.
Suntzeff --- CTIO/NOAO John L. Tonry ---
Univ of Hawaii
Claudio Aguilera --- CTIO/NOAO Brian
Barris --- Univ of Hawaii Andy Becker ---
Bell Labs/Univ. of Washington Peter Challis
--- Harvard-Smithsonian CfA Ryan Chornock
--- UC Berkeley Alejandro Clocchiatti ---
Univ Catolica de Chile Ricardo Covarrubias
--- Univ of Washington Alex V. Filippenko
--- UC Berkeley Peter M. Garnavich ---
Notre Dame University Malcom
Hicken--Harvard-Smithsonian CfA Stephen
Holland --- Notre Dame University Saurabh
Jha --- UC Berkeley Robert Kirshner ---
Harvard-Smithsonian CfA Kevin Krisciunas
--- CTIO/NOAO
37ESSENCEEquation of State SupErNovae Trace
Cosmic Expansion
- NOAO Survey on CTIO 4m, MOSAIC for 5 years
- Shares frame subtraction pipeline with SuperMacho
project, scheduled in other halves of
SuperMacho nights - Expect 200 supernovae with 0.1 lt z lt 0.8
- 3 band photometry V,R,I (observer frame)
- 2 sets of fields, so Dt4 days
- Goal is to determine the distance to each
redshift bin (Dz 0.1) to 2 - 3 photometry at peak SN brightness
38(No Transcript)
39Essence Survey Goal w
Monte Carlo of
40Supernovae, CMB, and large scale structure will
determine w to 10 This cannot fail to be
interesting! L or something else.
L
41Gajus Maknaitis, U of Washington
42The GOODs ACS Treasury Program
The Higher-Z Supernova Search Team
Adam Riess
Sees farther than others 1.2lt z lt 1.8 supernovae
Riess (STScI) Strolger (STScI) Tonry
(UH) Filippenko (UCB) Kirshner (CfA) Challis
(CfA) Casertano, (STScI) Dickinson
(STScI) Giavalisco (STScI) Ferguson (STScI)
43Expansion History of the Universe
44The Rise and Fall of Aphrodite
Oct 1
Oct 20
Aug 1
Sept 22
Oct 5
Oct 10
Oct 30
Oct 31
Nov 17
Nov 25
45Our first higher-z SN Ia, Aphrodite
Aphrodite (1ltzlt1.5)
ACS F850lp
ACS grism spectrum
NICMOS F110W
viz
46Looking back to the time when the Universe was
decelerating!
47Evidence for a change in cosmic acceleration
cosmic jerk
Future Acceleration without end?
48CfA Work Spectra for Classification Spectra for
Analysis Lightcurves UBVRI MLCS2k2 ESSENCE
onset of acceleration gt w Higher Z era of
deceleration gt jerk, w