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Science Verification Data

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For general information on the Science Verification process as well as the status and future plans of Science Verification projects, please use the link below:

 

Science Verification Information

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Currently Available Science Verification Data:

We now have several datasets available to demonstrate the early capabilities of ALMA.  In some cases these projects were observed before 16 antennas were available and while many of the subsystems were still being tested, so they should not be construed to represent the quality of the data that can be expected from the system as it is today.  They are provided here as a means for the user to become acquainted with the ALMA data structure, observing strategies and reduction techniques.  Given that the data have been taken during the construction phase, there may be more idiosyncrasies present than will be expected during full operations, so we ask the user to please review carefully the CASA guides provided with the datasets that represent unique observing modes or strategies, as indicated below.

Note that only data with prepared CASA guides are kept up to date with the current CASA release. For the other data, please consult the following knowledge base article: "If my data were calibrated and imaged in CASA 3.3 and I want to redo it, are there resources to help?"

For reference the list of Science Verification targets that was provided with the Cycle 0 Call for Proposals is given in Table 2 which indicates which observations have been completed or are in progress.  We do not expect to observe the other sources on that list.

1. TW Hya: Band 7, high spectral resolution. Many thanks to the following people for suggesting this source for ALMA Science Verification: Meredith Hughes, Stuartt Corder, Chunhua Qi, Karin Oberg, Michiel Hogerheide, Andrea Isella, Dmitry Semenov.

Additional data on TW Hya is available (without a separate CASA guide) here: Band 3, Band 6.

2. NGC3256: Band 3, low spectral resolution. Many thanks to the following people for suggesting this source for ALMA Science Verification: Kazushi Sakamoto, Alison Peck, Satoki Matsushita, Martin Zwaan.

3. Antennae galaxies: Band 7, high spectral resolution. Many thanks to the following people for suggesting this source for ALMA Science Verification: Christine Wilson, Junko Ueda, Francois Boulanger, Nicole Nesvadba, Cinthya Herrera.

Additional data on Antennae is available (without a separate CASA guide) here: Band 6

4. M100 Band 3, low spectral resolution. Many thanks to the following people for suggesting this source for ALMA Science Verification: Preben Grosbol and Catherine Vlahakis.

5. SgrA* Band 6, recombination lines. Many thanks to the following people for suggesting this source for ALMA Science Verification: Andreas Eckart, Stephane Leon, Steve Longmore, Sergio Martin, Stephane Leon, Farhad Zadeh.

Additional data on SgrA* is available: Band 3

6. BR1202-0725 Band 7: low spectral resolution. Many thanks to the following people for suggesting this source for ALMA Science Verification: Daisuke Iono, Satoki Matsushita, Shinya Komugi, Jeff Wagg, Tommy Wiklind, Dominik Reichers

Update: A second dataset on this source, taken shortly after the first, has been added to the above directory. This data was taken under very good conditions and at higher elevation, so has better sensitivity than the first but, due to a fault lacks the system temperature information which is required to perform a standard flux calibration.

7. IRAS16293 Band 6: high spectral resolution. Many thanks to the following people for suggesting this source for ALMA Science Verification: Jes Jorgensen, Suzanne Bisschop, Ewine van Dishoeck, Tyler Bourke, Johan Lindberg, Michiel Hogerheijde, Bill Dent, Martin Zwaan, Al Wootten

The raw band 6 dataset with the full spectral resolution is also available in the above directory. Be aware that this is a large file so downloading it and reducing it will take patience.

Update: A Band 9 dataset on IRAS16293, complete with CASA Guide for CASA version 3.4, is now also available. Note that the data products (calibrated science uv-data and images) deployed before June 18th, 2012 had a position offset of about 1.2" toward positive R.A. due to an error in the phase calibrator position. This has now been fixed in both the calibrated science uv-data and images as described in the casaguides

8. Centaurus A Band 6: high spectral resolution mosaic. Many thanks to the following people for suggesting this source for ALMA Science Verification: Juergen Ott, Christian Struve, Tommy Wiklind, Sergio Martin

9. Orion KL Band 6: high resolution spectral survey. Many thanks to the following people for suggesting this source for ALMA Science Verification: John BallyPaolo Cortes, Ciriaco Goddi, Lewis Knee, Jonathan Tan, Leonardo Testi, Tom Wilson, Melvyn Wright.

10. HD163296 Band 6 and Band 7: high spectral resolution. Many thanks to the following people for suggesting this source for ALMA Science Verification: Meredith Hughes, Andrea Isella.


Commissioning Test data

1. Proof of Concept of Response to Targets of Opportunity: GRB 110715A followup Band 7: continuum. Many thanks to the following people for participating in the Rapid Response testing: Dale Frail, Ashley Zauderer, Andreas Lundgren, Itziar de Gregorio, Mark Rawlings, Diego Garcia, Stuartt Corder


Using the data for publication

The following statement should be included in the acknowledgment of papers using the datasets listed above:

“This paper makes use of the following ALMA data: ADS/JAO.ALMA#Project code. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ."

For Science Verification data, the codes have the following form: ADS/JAO.ALMA#2011.0.0000X.SV, where X=1 for the TW Hya dataset, X=2 for the NGC3256 dataset, X=3 for the Antennae mosaic, etc.