The Universe in the Infrared How do astronomers use Spitzer and what do they do with the data? Funded by NASA’s Spitzer Science Center Images courtesy.

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Presentation transcript:

The Universe in the Infrared How do astronomers use Spitzer and what do they do with the data? Funded by NASA’s Spitzer Science Center Images courtesy NASA/JPL - Caltech

Pilachowski / August 2005 The Universe in the Infrared Slide 2 Outline Getting Observing Time on Spitzer Waiting for Observations Getting data Analysis Spitzer Archive Spitzer Program for Teachers

Pilachowski / August 2005 The Universe in the Infrared Slide 3 Getting Time on Spitzer Instrument Team GTO programs –IRAC, IRS, MIPS Legacy programs –GLIMPSE, GOODS, C2D, SINGS, SWIRE, FEPS General Observer programs

Pilachowski / August 2005 The Universe in the Infrared Slide 4 Cores to Disks Imaging surveys of nearby molecular clouds, with follow-up spectroscopy of young and embedded stellar sources to study the evolution of molecular cores into protostars and disks, the incidence and early evolution of sub-stellar objects, and the spatial structure of groups and clusters. "From Molecular Cores to Planet-Forming Disks"

Pilachowski / August 2005 The Universe in the Infrared Slide 5 FEPS A survey of hundreds of young stars with accretion disks, ranging in age from a few million years to a few billion years, to trace the evolution of planetary systems from stellar accretion through the coalescence of solids and accretion of remnant molecular gas, and on through the planetary debris disk phase. “ The Formation and Evolution of Planetary Systems: Placing Our Solar System in Context ”

Pilachowski / August 2005 The Universe in the Infrared Slide 6 GLIMPSE A 240 square degree IRAC survey of the inner Galactic plane, extending from 10 to 70 degrees in longitude on either side of the Galactic Center, and from -1 to +1 degree in latitude. Science goals include the structure of the inner Galaxy and the statistics and physics of star formation. “Galactic Legacy Infrared Mid-Plane Survey Extraordinaire”

Pilachowski / August 2005 The Universe in the Infrared Slide 7 SINGS A survey of 75 nearby galaxies to characterize their large- scale infrared properties, to understand the physical processes connecting star formation to the ISM, and to provide diagnostic templates for interpreting observations of objects in the distant universe. " The Spitzer Infrared Nearby Galaxies Survey”

Pilachowski / August 2005 The Universe in the Infrared Slide 8 GOODS GOODS unites extremely deep observations from NASA's Great Observatories, the Spitzer Space Telescope, Hubble, and Chandra, ESA's XMM-Newton, and from the most powerful ground-based facilities, to survey the distant universe to the faintest flux limits across the broadest range of wavelengths.Spitzer Space TelescopeHubble ChandraXMM-Newton “Great Observatories Origins Deep Survey"

Pilachowski / August 2005 The Universe in the Infrared Slide 9 SWIRES Wide-area imaging surveys reaching to cosmological redshifts of ~2.5 to study the evolution of dusty, star-forming galaxies, evolved stellar populations and AGN as a function of environment. The resultant catalogs will include ~2 million infrared-selected galaxies. “The Spitzer Wide-area Infrared Extragalactic Survey”

Pilachowski / August 2005 The Universe in the Infrared Slide 10 Proposing for GO Observations The second General Observer (GO) Call for Spitzer Proposals (CP) has been released. The deadline for receipt of GO proposals is 12 Feb 05, at 1pm (13:00h) PST. Investigators worldwide may submit a proposal in response to the Spitzer Space Telescope Cycle-2 Call for Proposals.Call for Spitzer Proposals (CP) Spitzer instrumentation is capable of imaging the sky at wavelengths of microns and spectroscopy between microns via the use of IRAC (InfraRed Array Camera), IRS (InfraRed Spectrograph) and MIPS (Multiband Imaging Photometer for Spitzer). A general introduction to the spacecraft and its instrumentation and capabilities can be found here, with many more details available in the Spitzer Observer's Manual.IRAC (InfraRed Array Camera)IRS (InfraRed Spectrograph)MIPS (Multiband Imaging Photometer for Spitzer)hereSpitzer Observer's Manual In order to apply for Spitzer time, proposers are required to submit three items in their proposal: cover sheet information, scientific and technical justification (in pdf ONLY) and a set of Astronomical Observation Requests (AORs), which provide the targets and mode of operation for each of the observations being requested. All three items must be submitted through Spot. Spot is a JAVA-based client-server software package that can be downloaded from the Proposal Kit area of this website. With Spot, proposers can easily construct the AORs that will accompany the other parts of the observing proposal.Proposal Kit Archival proposals and theoretical proposals will also be accepted in the second GO call. Both of these kinds of proposals should also be submitted via Spot, though they are to be submitted only if investigators are seeking NASA funding; if no supporting funds are required, no proposal should be submitted. Proposals prepared and submitted on-line in mid-February Reviewed by panels of astronomers working in related fields Astronomers notified in late spring

Pilachowski / August 2005 The Universe in the Infrared Slide 11 Science Justification From the Spitzer Cycle 1 Call for Proposals:

Pilachowski / August 2005 The Universe in the Infrared Slide 12 Selecting Targets Select possible targets based on science rationale Obtain accurate sky coordinates Estimate target energy flux in Spitzer passbands Determine optimal exposure times

Pilachowski / August 2005 The Universe in the Infrared Slide 13 Hope for Good News Nearly 600 proposals received, totaling 13,817 hours of observing time 3700 hours of time available Successful PIs notified in late spring

Pilachowski / August 2005 The Universe in the Infrared Slide 14 Observations Scheduling Spitzer Space Telescope Nominal Science Operations - Week 72 Schedule of Planned Science Observations Posted: March TargetName RA(J2000) Dec(J2000) PI ProgName AOT min_dur Scheduled_Time(UTC HD :25: :58:14.00WernerMWWSTARSmipsphot :16:05.0 3C :59: :40:20.03HouckCRL_3CRRmipsphot :27:35.0 3c382 18:35: :41:50.20Birkinsh3CRR_LOWmipsphot :54:56.4 3c386 18:38: :11:49.70Birkinsh3CRR_LOWmipsphot :46:12.6 3C : 5: : 1:31.00 SternSTERNHZRmipsphot :34:16.7 IC 4665 Pros17:47: :45:34.70 PilachowCLUSTERDmipsphot :11:08.6 IC 4665 Pros17:47: 2.935:41:55.60 PilachowCLUSTERDmipsphot :50:56.5 IC 4665 Pros17:46: :33:54.50 PilachowCLUSTERDmipsphot :30:41.8 IC 4665 Pros17:46: :25:33.30 PilachowCLUSTERDmipsphot :10:24.9 IC 4665 Pros17:46: :41:59.70 PilachowCLUSTERDmipsphot :50:22.0 IC 4665 Pros17:46: :47:36.70PilachowCLUSTERDmipsphot :37:05.2 IC 4665 Pros17:45: :40: 4.80 PilachowCLUSTERDmipsphot :16:58.1 IC 4665 Pros17:45: :31:23.00 PilachowCLUSTERDmipsphot :56:43.8 IC 4665 Pros17:45:34.785:25:36.60 PilachowCLUSTERDmipsphot :36:31.8 HD : 0: :41:25.00 BeichmanCOMPARATmipsphot :18:03.3 G :55: :33: 9.30 BerginEBERGINmipsphot :00:18.8 G :59:10.74: 4:24.40 BerginEBERGInmipsphot :07:08.6 Observers are notified 3-4 weeks before scheduled observations

Pilachowski / August 2005 The Universe in the Infrared Slide 15 Data Processing Pipeline After download, data are processed at the Spitzer Science Center, and then deposited in the Data Archive PIs notified when processed data are available for “pickup” over the Web Typically about 2-3 weeks after observations are obtained

Pilachowski / August 2005 The Universe in the Infrared Slide 16 Spitzer Data Archive All Spitzer data are archived and available for download Investigator data are available to the public 12 months after the observations are obtained

Pilachowski / August 2005 The Universe in the Infrared Slide 17 Spitzer Data data are delivered in “FITS” format (Flexible Image Transport System) FITS is a digital format that preserves numerical value of the intensity of each pixel for quantitative analysis

Pilachowski / August 2005 The Universe in the Infrared Slide 18 Viewing Spitzer Data FITS images can be read by ImageJ software available from NIH at Or use Star Image Processor on-line at Virginia Tech:

Pilachowski / August 2005 The Universe in the Infrared Slide 19 Spitzer Teacher’s Program 12 teachers undertaking research projects with Spitzer Proposed for and got Spitzer time “Young Stars in IC 2118” “Observing Iron Stars with Spitzer” Plus intergalactic star formation, supermassive black holes, AGNs, brown dwarfs In collaboration with NOAO