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HERA 1mm array receiver

Rx	#	Pol	tuning range	Trx	IF	IF Bw	Gim	Status	Rem.
			[GHz]	[K]	[GHz]	[GHz]	[dB]
HERA1	9	H	215-272	110-380	4	1	~10
HERA2	9	V	215-241	120-340	4	1	~10		(1)

Comments: (1) HERA2 pixels 4 and 9 are instable and should be flagged in data processing. <CK 9-May-2014>

HERA is a heterodyne receiver array consisting of two arrays of 3x3 pixels with 24" spacing. The two arrays have orthogonal polarization (V, H) the two polarizations pointing at identical locations on the sky. HERA is equipped with a derotator allowing to follow a source in the sky maintaining the same "footprint". Over the range of tunable frequencies, the beamwidth varies between 12" and 9".

HERA manual, version 2.0 by Sievers et al. 2006
Schuster et al. 2004, A&A, 423, 1171 A 230 GHz Heterodyne Receiver Array for the IRAM 30m telescope (local copy)
Observations with HERA in combination with EMIR or MAMBO, are not possible.
HERA mixers are single-sideband mixers. The image sideband is rejected.
The nominal bandwidth is 1 GHz.
HERA has two local oscillators, one for each polarization. Simultaneous observations of e.g. the 12CO and 13CO 2-1 lines are hence possible with both polarisations. Note that, in addition, the C18O 2-1 line lies within the 1GHz bandpass next to the 13CO line.

-  ⇤ ← Revision 2 as of 2009-02-13 18:30:15 → 
  Size: 1830
  Editor: visitor3
  Comment:
+   ← Revision 17 as of 2014-06-23 13:35:00 → ⇥
  Size: 1988
  Editor: CarstenKramer
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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- * Eight single pixel receivers A,B,C,D, and the 3x3 dual-polarisation HERA receiver are installed in the [http://www.iram.es/IRAMES/telescope/telescopeSummary/receiver6.html receiver cabin].
+==== HERA 1mm array receiver ====
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- * Four of the 8 A,B,C,D receivers can be used simultaneously. HERA cannot be combined with other receivers.
+||'''Rx''' ||#||'''Pol'''|| '''tuning range''' || '''Trx'''   || '''IF'''    || '''IF Bw''' || '''Gim'''  || '''[[http://www.iram.es/IRAMES/mainWiki/TelescopeSystemStatus#HERA|Status]]''' || '''Rem.''' ||
||         ||  ||       || '''[GHz]'''        || '''[K]'''   || '''[GHz]''' || '''[GHz]''' || '''[dB]''' || || ||
||HERA1     || 9|| H       || 215-272            || 110-380     ||  4          || 1           || ~10 || {{attachment:haken.gif}} || ||
||HERA2     || 9|| V       || 215-241            || 120-340     ||  4          || 1           || ~10 || {{attachment:haken.gif}} || (1) ||
-Line 5:
+Line 8:
-||'''Rx''' ||#||'''Pol'''|||||||||| '''Rx combinations''' ||'''tuning range''' || '''Trx'''   || '''IF'''    || '''IF Bw''' || '''Gim'''  || '''Rem.''' ||
||         ||  ||       || '''AB'''  || '''CD'''  || '''AD'''  || '''BC'''  || ||'''[GHz]'''        || '''[K]'''   || '''[GHz]''' || '''[GHz]''' || '''[dB]''' || ||
||HERA1     || 9|| H       ||   ||   ||   ||   || X || 215-272            || 110-380     ||  4          || 1           || ~10        || '''2.,3.'''||
||HERA2     || 9|| V       ||   ||   ||   ||   || X || 215-241            || 120-340     ||  4          || 1           || ~10        || '''2.,3.'''||
+Comments: (1) '''HERA2 pixels 4 and 9 are instable and should be flagged in data processing.''' <CK 9-May-2014>
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- * [http://www.iram.es/IRAMES/groups/receiver/receiver.html More information on the heterodyne receivers.]
+HERA is a heterodyne receiver array consisting of two arrays of 3x3 pixels with 24" spacing. The two arrays have orthogonal polarization (V, H) the two polarizations pointing at identical locations on the sky. HERA is equipped with a derotator allowing to follow a source in the sky maintaining the same "footprint". Over the range of tunable frequencies, the beamwidth varies between 12" and 9".
 Line 12:
-. HERA is a heterodyne receiver array consisting of two arrays of 3x3 pixels with 24" spacing. The two arrays have orthogonal polarization (V, H) the two polarizations pointing at identical locations on the sky. HERA is equipped with a derotator allowing to follow a source in the sky maintaining the same "footprint". The tunable range is between 215 and 272 GHz. In this range the beamwidth varies between 12" and 9".
+  * [[http://www.iram.es/IRAMES/otherDocuments/manuals/HERA_manual_v20.pdf|HERA manual, version 2.0]] by Sievers et al. 2006
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-  * [http://www.iram.es/IRAMES/otherDocuments/manuals/HERA_manual_v20.pdf HERA manual, version 2.0] by Schuster et al. 2006
+  * [[http://esoads.eso.org/abs/2004A%26A...423.1171S|Schuster et al. 2004, A&A, 423, 1171]] A 230 GHz Heterodyne Receiver Array for the IRAM 30m telescope ([[http://www.iram.es/IRAMES/otherDocuments/manuals/0179hera.pdf|local copy]])
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-  * [http://esoads.eso.org/abs/2004A%26A...423.1171S Schuster et al. 2004, A&A, 423, 1171] A 230 GHz Heterodyne Receiver Array for the IRAM 30m telescope ([http://www.iram.es/IRAMES/otherDocuments/manuals/0179hera.pdf local copy])
+  * Observations with HERA in combination with EMIR or MAMBO, are not possible. 

  * HERA mixers are single-sideband mixers. The image sideband is rejected.

  * The nominal bandwidth is 1 GHz. 

  * HERA has two local oscillators, one for each polarization. Simultaneous observations of e.g. the 12CO and 13CO 2-1 lines are hence possible with both polarisations. Note that, in addition, the C18O 2-1 line lies within the 1GHz bandpass next to the 13CO line.