Published March 9, 2021 | Version v1.0

Data from the IRAM-30m Large Program `Astrochemical Surveys At IRAM' (ASAI)

  • 1. CNRS, IPAG, Univ. Grenoble Alpes, F-38000 Grenoble, France
  • 2. IGN Observatorio Astronómico Nacional, Apartado 1143, E-28800 Alcalá de Henares, Spain

Contributors

Contact person:

  • 1. IRAP, Toulouse, France

Description

Dataset for the ASAI IRAM-30m Large Program (https://www.iram-institute.org/EN/content-page-344-7-158-240-344-0.html) provided in zenodo within the framework of ACO (AstroChemical Origins): (H2020 MSCA ITN, GA:811312)

The reference article is Lefloch et al. 2018, Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 4, p.4792-4809

whose doi is: 10.1093/mnras/sty937

Fully reduced spectral line surveys are included for 10 young stellar objects. 

SOURCE SAMPLE: 
----------------------------------------------------------------------------------------------------------------
Sources     alpha(2000)    delta(2000)    rms       rms       rms       dnu      Comment 
                                               (3mm)     (2mm)    (1.3mm)     kHz
----------------------------------------------------------------------------------------------------------------
L1544        05h04m17.2s    25d10'42.8"   2.1-7.0        -          -          48.8    Evolved prestellar core
TMC1        04h41m41.9s    25d41'27.1"   3.0-6.3   4.2-4.2         -       48.8, 195.3    Early prestellar core
B1        03h33m20.8s    31d07'34.0"   2.5-10.6  4.4-8.0      4.2-4.6   195.3    First hydrostatic core
IRAS4A        03h29m10.4s    31d13'32.2"   2.5-3.4    5.0-6.1      4.6-3.9   195.3    Class 0: Hot corino prototype
L1527        04h39m53.9s    26d03'11.0"   2.1-6.7    4.2-7.1      4.6-4.1   195.3    Class 0: WCCC prototype
L1157mm        20h39m06.3s    68d02'15.8"   3.0-4.7    5.0-6.5      3.8-3.5   195.3    Class 0: WCCC
SVS13A        03h29m03.7s    31d16'03.8"   2.0-4.8    4.2-5.1      4.6-4.3   195.3    Class I: Hot corino
AB Aur        04h55m45.8s    30d33'33.0"   4.6-4.3    4.8-3.9      2.1-4.3   195.3    Protoplanetary disk
L1448-R2    03h25m40.1s    30d43'31.0"   2.8-4.9    6.0-9.7      2.9-4.9   195.3    Outflow shock spot
L1157-B1    20h39m10.2s    68d01'10.5"   1.1-2.9    4.6-7.2      2.1-4.2   195.3    Outflow shock spot
------------------------------------------------------------------------------------------------------------------
i)spectral coverage, spectral resolution, and range of rms noise achieved in an element of 1 km/s for each spectral window. 
The rms values (in TA*) are measured in the range 86-87 GHz and 113-114 GHz at 3mm, 132-133 GHz and 169-170 GHz at 2mm, 
220-221 and 260-261 GHz.
ii) No data were obtained at 2mm and 1.3mm for L1544, at 3mm and 1.3mm for TMC1. 
iii) Complementary observations in the band 72-80 GHz have been obtained for L1544 and protostars IRAS4A, L1527, L1157mm, 
SVS13A. The 72-80 GHz and 106-115 GHz data of L1544 will be made available in a forthcoming release
iv) The data of AB Aur will be made available in a forthcoming release


OBSERVATIONS AND SPECTRAL COVERAGE:
Details about the observing procedure and the calibration can be found in the article presenting ASAI: "Astrochemical evolution 
along star formation: Overview of the IRAM Large Program ASAI" (Lefloch, Bachiller et al. 2017).

L1544      80.0 - 106.0 GHz

TMC1      130.0 - 164.9 GHz ; gap from 161.6 to 163.0 GHz  

Barnard1   80.5 - 112.2 GHz  
          130.0 - 172.7 GHz  
          200.5 - 276.0 GHz  

IRAS4A     71.7 -  79.6 GHz  
           80.5 - 112.3 GHz  
          125.5 - 133.3 GHz  
          130.0 - 172.8 GHz  
          200.5 - 276.0 GHz  

L1527      71.7 -  79.6 GHz 
           80.5 - 112.3 GHz 
          125.5 - 133.3 GHz 
          130.0 - 172.8 GHz 
          200.5 - 276.0 GHz 

L1157mm    71.7 -  79.6 GHz 
           80.5 - 112.3 GHz 
          125.5 - 133.3 GHz 
          130.0 - 172.8 GHz 
          200.5 - 276.0 GHz 

SVS13A     71.7 -  79.6 GHz 
           80.5 - 116.0 GHz 
          125.5 - 133.3 GHz        
          130.0 - 172.8 GHz 
          200.5 - 276.0 GHz 

L1448-R2   80.5 - 116.0 GHz 
          130.0 - 173.3 GHz 
          200.5 - 276.0 GHz 


L1157-B1   71.7 -  79.5 GHz 
           78.0 - 118.0 GHz; fts 390 kHz res;
          125.5 - 133.3 GHz 
          128.2 - 173.7 GHz 
          200.2 - 265.5 GHz; fts 781 kHz res;
          260.4 - 322.1 GHz; WILMA 2 MHz res: 
          328.4 - 350.1 GHz; WILMA 2 MHz res; 

The data obtained for each source are located in the corresponding subdirectory: 
source_f1_f2.fits    : calibrated spectral band in the band f1 - f2 (in GHz)  
source_72_80.fits    : complementary data in the bands 72-80 GHz  whenever observed. 
source_125_133.fits  : complementary data in the band 125.5-133.5 whenever observed.


UNITS:
The line intensity are expressed  in units of antenna temperature corrected for atmospheric attenuation and the coupling with 
the sky, TA*, by default. The interested user should to the IRAM webpage http://www.iram.es/IRAMES/mainWiki/Iram30mEfficiencies 
to convert line intensities from antenna to main-beam temperature scale. 


QUESTIONS and ACKNOWLEDGMENTS
If you have any questions about the data please contact us
(bertrand.lefloch@univ-grenoble-alpes.fr, r.bachiller@oan.es). We also like to hear about any
scientific use of the data and would appreciate acknowledgment in
publications or talks using the ASAI data. 
 

Files

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Additional details

References

  • 10.1093/mnras/sty937