# School2012

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This is the wiki entry for the CARMA Summer School June 17-23, 2012. Individual talks will be posted here and you are free to post additional notes, comments etc. The participants in the 2012 Summer School are listed below. All students are strongly encouraged to return to CARMA as Observers within 12 months of completing the Summer School.

## Contents

### Instructors

Melvyn Wright (UCB)
Dick Plambeck (UCB)
Marc Pound (UMD)
John Carpenter (CIT)
Doug Friedel (UIUC)
Nikolaus Volgenau (OVRO)
David Hawkins (OVRO)
Peter Teuben (UMD) [remote]

### Local Organizing Committee

Mary Daniel (OVRO)
Cecil Patrick (OVRO)
Terry Sepsey (OVRO)

### Students

Roster and Contact Information
Carmen Rodriguez Gonzalvez, California Institute of Technology, carmenrg@ipac.caltech.edu
Erin Grand, University of Maryland, eringrand@gmail.com
Che-Yu Chen, University of Maryland, cychen@astro.umd.edu
Dyas Utomo, UC Berkeley, dyas@berkeley.edu
Mai Truong, UC Berkeley, mai.truong@berkeley.edu
Isaac Shivvers, UC Berkeley, ishivvers@berkeley.edu
Dominique Segura-Cox, University of Illinois, segurac2@illinois.edu
Yiran Wang, University of Illinois, wang60@illinois.edu
Ashley Lindley, University of Alabama, campbea1@uah.edu
Aaron Juarez, Vanderbilt-Fisk, ajuarez88@gmail.com
Xing Lu (Walker), Harvard University, xlu@cfa.harvard.edu
Chihomi Hara, Tokyo University, c.hara@nao.ac.jp
Maria Jose Maureira, Yale University, mm2445@pantheon.yale.edu
Matthew Rickert, Northwestern University, matthewrickert2017@u.northwestern.edu
Kyle Westfall, Kapteyn Astronomical Institute, Groningen, the Netherlands, westfall@astro.rug.nl
Jorge Gonzalez, Pontificia Universidad Catolica de Chile, jgonzal@astro.puc.cl
Pedro Salas, Pontificia Universidad Catolica de Chile, pnsalas@uc.cl

Welcome! We look forward to having you at the 2012 CARMA summer school. Please post your itinerary on the Wiki soon in the Itineraries & Shared Rides section. Doing so serves as confirmation for us to know you will be attending summer school and that you have secured both air and land transportation to the school.

Q1: Are there any detailed maps of how to get to the CARMA site from local airports, or from the CARMA site to OVRO (location of the dorms and cottage)?
A1: Directions/Maps to CARMA are on the Wiki under “Air and Land Directions to CARMA.” Click on “Detailed driving directions.” Select the directions needed. Also included is information on markets, gas stations, how to avoid getting a speeding ticket, photos of road signs, and other useful items posted by Marc Pound, school staff member.

Q2: Is dinner provided on Sunday, June 17th?
A2: Spaghetti makings will be provided for all to enjoy (with you as the cook) Sunday evening at the CARMA control building. Other options are for you to bring food for Sunday night dinner, or make arrangements to find a place to eat. There are a few restaurants in Big Pine (the nearest town), and many more in Bishop (20miles to the north).

Q3: I am camping. Where do I go to check in and get directions to the campgrounds?
A3: Upon arrival to the CARMA site, please check in at the CARMA control building for directions to the campgrounds. Also, email Mary if you will be arriving to CARMA before 6/17 or departing after 6/24 so we know if we need to request accommodations for additional days.

Q4: I do not have land transportation yet. What are my options?
A4: Every student is responsible for providing his/her own air and land transportation. Option 1: Reserve a rental car. If you are renting a car and have space for additional passengers, please post how many passengers you would be willing to take so students can contact you. Option 2: Post your itinerary to the Wiki along with the request that you need a ride. We encourage students to share rides/carpool when possible.

Q5: What happens if I miss my shared car ride due to a flight delay?
A5: Emergency Back-up Transportation Plan: In the event that your flight is delayed and you miss your ride or something else happens to delay your arrival, please call the CARMA control building at (760) 938-2075 ext 181 to notify us of what has happened. Then, you will need to rent a car at the airport and drive to the CARMA site.

Q6: Where do I go for meals?
A6: If you are staying in an OVRO dorm room (in the valley), than you can have breakfast in the OVRO kitchen or choose to head up to the Control Building. If you choose this option, you will need to plan for a 25 minute drive to the Control Building for an 8 am class Monday morning. (Classes will begin at 9 am thereafter.) If you are camping, you will want to have breakfast in the Control Building, where classes are held. Breakfast takes place between 7 and 8 am each day. Lunch and dinner will always take place in the control building.

Q7: Where should I go on the first day of class, June 18th?
A7: To the CARMA control building.

Q8: What time should I show up on the first day of class?
A8: 8 am. Again, classes will resume at 9 am from Tuesday on.

Q9: How do I pay for my accommodations and how do I know how much to pay?
A9: Mary will be sending an email communicating information about your lodging fees. Unless you are from an institution that is a CARMA affiliate (in which case your institution will be invoiced), you will need to bring exact payment in the form of cash or check with you to summer school. Fees will be collected once there. Note: Credit cards will not be accepted.

If you have any additional questions, please don’t hesitate to contact Mary at mary@ovro.caltech.edu.

## Travel Arrangements

#### Air and Land Directions to CARMA

For travel by air there are a number of options - Las Vegas; Los Angeles Area: LAX, Burbank, Ontario; Reno; Inyokern, and Mammoth Lakes. Most of these require a 4 to 5 hour drive to get to CARMA from the airport. The exceptions are Inyokern (airport code IYK) and Mammoth Lakes (airport code MMH) which are small regional airports near the Owens Valley. Only United flies to IYK (via LAX) and there are 2 flights a day. From IYK, it is about a 2 hour drive to CARMA (rental cars from Avis and Dollar available). Mammoth Lakes Airport is one hour north of OVRO and also has a few flights per day from LAX on HorizonAir and United, with Enterprise and Hertz rental cars available. See here for details.

Detailed driving directions to OVRO and CARMA from Los Angeles, Reno, and Las Vegas are here.

Maps: Google CarmaMap (a collaborative map maintained by some of us). Green placemarks are the CARMA buildings, yellow is the Ferguson Campground, blue are antenna stations.

#### What To Bring If You Are Camping

Since all meals will be at the control building, the only essential camping equipment is a sleeping bag and a mat. The sleeping bag need not be very warm, since nighttime temperatures will be above freezing. Students who prefer to have a tent to themselves should plan on bringing a tent. Tents will be provided for those who don't mind sharing. We'll do a poll for who needs what, once the accommodation choices are settled.

The campground reserved for the School is Ferguson Campground; its entrance is about 1 mile west of the entrance to the CARMA site on the opposite side of the road from CARMA, at the sign that says Cedar Flat Group Camp.

When you arrive, check in at the CARMA Control Building to let the observers know you have arrived, to pick up any gear you have reserved and to get directions to the campsite.

#### Other Things You May Want To Bring

Flashlight, bug spray, plastic coffee mug, sunglasses, windbreaker, hat with brim (for sun), sweater, rainjacket, water bottle, binoculars for star gazing/ birdwatching, camera, and good walking shoes.

#### The Hike

Our traditional post-summerschool hike is to Second Lake, in the Sierras above Big Pine. We plan to start from the Glacier Lodge trailhead at 9 am on Saturday (June 23). We should reach the lake about noon and get back to the cars by about 3:30 pm -- making it possible to return to Pasadena, Berkeley, or Las Vegas late that night. The hike is about 10 miles round trip with 2500 feet of elevation gain. The past 2 years some of us have pushed on farther, toward the Palisade Glacier; both times we reached Sam Mack Meadow but soon were turned back by thundershowers.

### Itineraries & Shared Rides

Use this wiki table to help us plan accomodation and meals, and to coordinate shared rides. Give your name, your flight details, how many you can accomodate, and special notes such as whether you will be toting camping gear. For help on editting wiki tables, see this page
Gender will be used to match up shared dorm/tent accomodations. Also please let us know any dietary restrictions since CARMA is providing most of your meals

Participant Travel Information
Name Gender Airport Arrival
Day/Flight/Time
Departure
Day/Flight/Time
Driving? Camping? If Camping, can you bring:
Tent? / Sleeping Mat?
Notes Dietary Restrictions
Joe Example M LAX June 17 / Delta #1234 / 10am Jul 24 / Delta #4321 / 2pm Y Y N/Y I can take 3 riders. I only eat cookies
Isaac Shivvers M NA June 17 (driving from Berkeley) June 24 (driving to Berkeley) Y Y will bring tent, sleeping mat, &etc Giving a ride to Dyas, Mai, and Maria nope
Mai Truong F NA June 17 (driving from Berkeley) June 24 (driving to Berkeley) N N NA I'm getting a ride from Isaac. I eat everything
Dyas Utomo M NA June 17 (driving from Berkeley) June 24 (driving to Berkeley) N N NA I'm getting a ride from Isaac, but need a ride from cottage to control room. no pork
Matthew Rickert M LAX June 17 / #1227 / 12:45pm June 24 / #33 / 9:40am N N NA Riding with Kyle, Jorge, and Chihomi I'm not picky
Kyle Westfall M LAX June 17 / KL0601 / 11:45 June 24 / DL1144 / 09:00 Y N NA Rented a car with Matthew R, Jorge G, Chihomi H., and Aaron J. ; Can probably take 2 people from OVRO to CARMA everyday. None
Dominique Segura-Cox F LAS June 17 / #1479 / 10:05a June 24 / #1254 / 12:55a N Y I can bring a mat but not a tent. Riding with Doug Friedel No
Yiran Wang F LAS June 17 / SA 357 / 9:44a June 24 / SA 456 / 1:00a N N NA Riding with Dom Segura-Cox and Doug Friedel, but need a ride from dorm to the control room None
Chihomi Hara F LAX June 17 / KE001 / 08:50am June 24 / KE002/ 11:30am N Y I can bring a bag but not a mat and a tent Riding with Matthew R, Jorge G, and Kyle W None
Erin Grand F LAX Arriving for observing on June 13th June 24 / UA1248 / 4:55pm Y Y I have a sleeping bag, but nothing else. Currently taking Che-Yu, Pedro, Carmen, and Xing to LAX. No pork or mushrooms
Doug Friedel M LAS June 17 / #1479 / 10:05a June 24 / #1254 / 12:55a Y Y I will bring a sleeping bag Car is full from Las Vegas, but room for 1 more on return None
Ashley Lindley F Ontario, CA June 15 / Delta #4587 / 9:45p July 2 / UA#633 / 2:39p Y N N/A Taking Bahmal, Xing and Pedro in rental car to CARMA From LA Nothing too spicy, please.
Xing Lu M LAX June 17 / AA25 / 10:20am June 24 / AA192 / 09:40pm N Y I can bring a bag and a mat. Riding with Ashley to CARMA; riding with Erin to LA. None
Maria Jose Maureira F SFO June 17 / TBD June 24 / TBD N Y I'll bring a sleeping bag, but no sleeping mat I'm getting a ride from Isaac. None
Jorge González M LAX June 17 / 09:20 June 24 / 13:30 N Y Sleeping bag, no mat Riding with Matthew, Kyle and Chihomi None
Carmen Rodriguez Gonzalvez F LA June 17 / - June 24 / TBD N - Could I get a lift from someone from the dorms to the control room? None
Marc Pound M LAS June 16 / noon / SW #1758 June 25 / 2:35pm / SW #164 Y Y Will bring bag and tent Vegetarian
Dick Plambeck M NA June 17 (driving from Berkeley) late June 23 (after the hike) or June 24 Y Y Will bring bag, tent, etc. Giving a ride to Mel None
Pedro Salas M LAX June 17 June 24 N Y Will bring mat and bag None
Che-Yu Chen F LAS/LAX June 17 / UA #0637 / 10:04a June 24 / UA #0419 / 10:41p N Y sleeping bag, no mat/tent Riding with Doug Friedel to CARMA / Riding with Erin to LA None
Aaron Juarez M LAX June 17 / Delta 2020 / 10:40am June 24 / Delta 746 / 12:15am Y N n/a Heading over with Kyle W, Matthew R, Jorge G, and Chihomi H... None
Peter Teuben M n/a n/a n/a N N n/a will be in Princeton, mostly online n/a

## Computers

You are strongly encouraged to bring your own laptop since a limited number of desktops will be available for student use. Wireless access will be available, as will wired ethernet.

Miriad is the data reduction and analysis environment for CARMA. You should install it before arriving at the school. It can be installed on Linux and Mac. A new release, dubbed school12 is available. See the Miriad wiki page for details on obtaining and installing this; if you have questions contact Peter Teuben (teuben@astro.umd.edu), who is more than happy to help. Once installed, there are small sanity tests you should run to verify it is all working.

Note: we will not be devoting any time during the school to MIRIAD installation issues, as we must concentrate on interferometry. Please make every effort to get it installed before you arrive. If you cannot get MIRIAD installed on your machine, you can log in to the available desktops from your laptop to reduce data.

### Electricity

Electricity will be supplied at 120V, 60 Hz, using outlets accepting "American-style" parallel flat-pronged plugs.

### Network Info, Logging in, Directories etc.

CARMA has two networks, public and private:

• public - accessible to outside world (mmarray.org == ovro.caltech.edu), located primarily in the valley at OVRO
• private – not accessible outside OVRO (carma.pvt), located entirely at Cedar Flat
• There is a 54 Mbps microwave link between Cedar Flat and OVRO

The wireless ESSID at Cedar Flat is GUEST. Note this ESSID is not broadcast.

You should never need to log in to any of the valley computers from the high site. Direct ssh/scp to your home machine is possible from the GUEST network.

##### Printing

From the GUEST network, there are two printers available:

clrcarma.mmarray.org -- color printer
bwcarma.mmarray.org  -- black and white printer


##### Logging in

The main account for observers is obs. Any work you will not be doing on your own laptop, e.g.data reduction,should be done on s3.carma.pvt:

ssh -Y obs@s3.carma.pvt

#### Scratch Disk Space

Summer School disk space is /opt/summerschoolscratch mounted on the computer s3.carma.pvt. You may create your own subdirectory for reducing data or whatever.

cd /opt/summerschoolscratch

mkdir yourname

cp -pr /opt/sdp/sciencedata/yourproject.yourobsblock.mir yourname

cd yourname

Note: files in /opt/summerschoolscratch will be deleted after 90 days.

#### Copying data to your laptop

Many of you will be reducing data on your own laptop MIRIAD installation. When your observing is done, you can secure copy your data directly from sdp.carma.pvt:

scp -pr obs@sdp.carma.pvt:/opt/sdp/sciencedata/yourproject.yourobsblock.mir .

(note that final period is required!)

Most students arrive with an idea of something they would like to observe while at the School. On the first day of school, we will discuss these ideas as a group and decide which have the most chance of success. We will encourage students to form small groups to plan, execute, reduce, analyze, and present their observations. We realize some of you may be completely new to interferometry and not have a specific idea about what to observe. That's ok, you can join someone else's group or the instructors can select a good target for you.

The CARMA telescope is designed as an aperture synthesis telescope, typically operating as two independent subarrays of 15 and 8 antennas, respectively. In the "Science 1" subarray, there are two receiver bands, 3 mm and 1 mm, and the spectral line correlator described here. A basic aperture synthesis observation makes an image the size of the primary beam (λ/D ~1 arcmin at 100 GHz; 0.5 arcmin at 230 GHz) with a resolution corresponding to the maximum separations of the antennas. During the Summer School, CARMA will be in the somewhat compact D configuration, with an angular resolution ~6 arcsec at 100 GHz, and ~3 arcsec at 230 GHz. The "Science 2" subarray of eight 3.5m antennas will be available for continuum-only projects at 30 GHz (primary beam ~ 11 arcmin; resolution ~2 arcmin) and 90 GHz (primary beam ~3.6 arcmin; resolution ~40 arcsec). The Sci2 correlator produces 7 GHz of continuum data.

Your observing project should be achievable in a 3-4 hours time. Detection experiments are discouraged since we want you to get some actual data to play with. Availability of the 1 mm system will depend strongly on weather, so we cannot guarantee 1 mm projects will be scheduled.

Project ideas will be discussed on the first day of the school with the first observation intended for that night. You should be ready with some basic information about your selected target:

• What kind of source is it? (galaxy, protostar, planet, etc)
• What is it's right ascension and declination?
• What frequency do you want to observe at?
• Which subarray are you using?
• Are you doing spectral line or continuum or both?
• How bright is your source (Jy or K)?
• What is the angular size of your source?
• If spectral line, what is it's LSR velocity?
• If spectral line, what is the expected line width?

In order for the observing schedule to accomodate for all selected projects and to allow for make-up time in case of poor weather or unforseened circumstances, it is likely that some students will be grouped on observing projects.

Once the projects have been decided, each group must insert the project information via the Summer School proposal web page. The login/password will be given at the school.

## The CARMA Memo You Will Write

As in previous years, the class will author a CARMA Memo with the results of your observations. We have created a master LaTeX file in /opt/summerschoolscratch/memo/school2012_master.tex. You should include your writeup in this file using the LateX \include command. There are more detailed instructions on the file itself. The easiest thing is to put all your text and figures in a subdirectory, e.g. /opt/summerschoolscratch/memo/yourname. Please use the latex \ref and \label commands to indicate figures and tables so Marc doesn't have to go through and renumber all the figures and tables! Also please use bibtex format for your references, putting them in school2012_master.bbl, and refer to them with \cite in the text. ADS can generate bibtex entries for your references for you automatically.

We have put an example you may follow in /opt/summerschoolscratch/memo/example. Once you have added your text, figures, and references, you should do

pdflatex school2012_master.tex

bibtex school2012_master.aux

pdflatex school2012_master.tex

evince school2012_master.pdf

and fix any errors. There is no page limit, include as much text and as many figures as you wish.

Example memos from previous years : 2011 2010 , 2009 , 2008 , 2007

## Lectures and Handouts and Useful Links

### Lectures

Introduction to CARMA Computing (Marc Pound)

12 Steps to Reducing Mystery Data (Nikolaus Volgenau)

Introduction to MIRIAD - PDF (Doug Friedel )

Observer Responsibilities (Nikolaus Volgenau)

Creating observing scripts (John Carpenter)

Reducing CARMA data (John Carpenter)

General script to calibrate CARMA uv data ** updated June 20 (John Carpenter)

Simpler version of calibration script for pure wideband CARMA uv data **updated June 20 (John Carpenter)

Data flagging script to use with calibration script (John Carpenter)

Script to produce CARMA images (John Carpenter)

Hardware Lecture #1: Receivers (7.2 MB) (Dick Plambeck)

Polarization with CARMA (Dick Plambeck)

Hardware Lecture #2 - Correlators (8.1MB) (David Hawkins)

Hardware Lecture #3: Phaselocks (2.8 MB) (2011 Dick Plambeck)

Future Technical Developments at CARMA (Nikolaus Volgenau)

## Photos: Picasa Web Album

We've created a Picasa Web Album and encourage you can share your photos from the school!