Knowledgebase
To establish the SAMP connection between HSA and HIPE follow the steps given in the attached video: 1. Open the HSA Interface [http://archives.esac.esa.int/hsa/whsa] 2. Open the SAMP Hub 3. Open HIPE 4. Send data from HSA to HIPE Note that HIPE a...
At the time of writing (late July, 2018), we are unaware of any OS/Platform combinations on which HIPE will not install or run, although we are aware that it is possible that it will start to fail on some future OS/Platorm combinations, or because of the ...
Fringes, caused by standing waves, may be present in HIFI spectra. If present, and at a level that the user feels affects data quality, these have to be removed interactively in post-processing as there is no simple recipe for doing it automatically. Ther...
To find out about the steps to follow in reducing SPIRE spectroscopy and, in particular, how to carry background subtraction of spectra, there is a Herschel Science Centre short videotutorial that shows you the steps involved and also describes the data p...
As for SPIRE FTS spectroscopy, semi-extended sources provide the user with a very special set of problems, as they are sources of a size intermediate between point sources (i.e. unresolved) and extended sources (clearly resolved), for which neither point ...
Extended sources provide the user with a particular set of problems that require special techniques. We assume that you have watched the Herschel Science Centre short videotutorial called _Starting with PACS Spectroscopy_: https://www.youtube.com/watch...
HIFI Level 2.5 (i.e. science ready) data are calibrated in an antenna temperature scale that is very specific to HIFI, making direct comparison of data difficult with other observatories. HIFI antenna temperature can be converted to a more physical scale,...
We assume here that you have watched the Herschel Science Centre short videotutorial called _Starting with PACS Spectroscopy_: https://www.youtube.com/watch?v=rcY487Z9Kyg [https://www.youtube.com/watch?v=rcY487Z9Kyg]  And the Herschel Science Centre s...
HIFI spectra can be of two kinds: ON source spectra, in which the keyword "isLine=True) and OFF source, reference position spectra, for which isLine=FALSE. The reference position though may, itself, be contaminated by background emission, compromising the...
Both point source photometry - from source fitting - and aperture photometry can be extracted from SPIRE maps. If you prefer to obtain aperture photometry from SPIRE maps, you should check the appropriate Herschel Science Centre short videotutorial for ...
The Herschel Explanatory Legacy Library - sometimes known by its acronym, HELL - contains over 1350 documents and resources from all phases of the Herschel mission from original concept to Archive Phase and is being constantly expanded and updated. The Do...
There are several ways of accessing the Herschel short videotutorials. A series of legacy videotutorials have been produced, with useful knowledge for current and future users of Herschel data and services. They cover: * Herschel data and the Herschel...
Fitting a baseline to HIFI spectra is an essential part of post-processing of HIFI data. There is a HIPE task called fitBaseline that allows a baseline to be fitted to your HIFI data interactively, subtracting, or dividing by a polynomial baseline. A Hers...
The Herschel Science Centre has produced a useful short videotutorial that shows you how to use a useful script in HIPE for SPIRE line fiiting (NB: it does not cover the fully interactive mode of line-fitting). You can find the short videotutorial here: ...
We have prepared a short videotutorial on Inspecting Data Products in HIPE. This will explain to you the different types of data products that you can find and their content and applicability. You can find it here: https://www.youtube.com/watch?v=Y7LJK0m...
The HIFI Observation Context consists of six categories of products that are found in the Herschel Science Archive (data at various levels of processing, browse products. calibration products, auxiliary products, quality products and trend analysis produc...
The Herschel Science Centre has produced a short videotutorial guide for users of SPIRE spectrometry data to show how to use the observation context and where to find it. https://www.youtube.com/watch?v=D66Yxz8waVI&t=413s [https://www.youtube.com/watch?...
If you are an absolutely beginner with Herschel data and want to learn how to do photometry on PACS observations there are two places to start before working with data. First, you should look at the Quick Start Guide for Photometry (CSG), otherwise known...
There are two excellent starting points for learning how to use PACS spectroscopy data. We recommend strongly that you start by reading the Quick Start Guide to Spectroscopy [https://www.cosmos.esa.int/documents/12133/996891/PACS+Data+Reduction+Launchpad+...
If you are an absolutely beginner with Herschel data and want to learn how to do photometry on PACS observations, there are two places to start before working with data. First, you should look at the Quick Start Guide for Photometry (CSG), otherwise know...
The Herschel Science Centre has produced a short videotutorial that gives a simple, step-by-step guide for anyone who would like to perform aperture photometry on a SPIRE image. You can find it in the following short videotutorial: https://www.youtube.co...
  Reduction and analysis of SPIRE FTS spectra treats two, generic cases: point sources (sources smaller than 3-4 arcseconds that are effectively a point-source for SPIRE) and extended sources (anything larger than 40 arcseconds). However, there are many s...
The Herschel Science Archive (HSA) allows multiple categories of searches to be carried out using different criteria. In particular: * Search by target name. * Search by coordinates (in a radius around a particular position). * Search by catalogue ...
There is a useful script in HIPE that helps the observer to carry out the reduction of spectra of extended sources observed with the SPIRE Fourier Transform Spectrometer. The following Herschel Science Centre short videotutorial explains how to use this s...
Assuming that you have watched the Herschel Science Centre short videotutorial called _Starting with PACS Spectroscopy_: https://www.youtube.com/watch?v=rcY487Z9Kyg [https://www.youtube.com/watch?v=rcY487Z9Kyg]  And the Herschel Science Centre short v...
Assuming that you have watched the Herschel Science Centre short videotutorial called _Starting with PACS Spectroscopy_: https://www.youtube.com/watch?v=rcY487Z9Kyg [https://www.youtube.com/watch?v=rcY487Z9Kyg]  And the Herschel Science Centre short v...
Before going further, there are two excellent starting points for learning how to use PACS spectroscopy data. We recommend strongly that, if you are unfamiliar with PACS spectroscopy, you start by reading the Quick Start Guide to Spectroscopy [https://www...
  Name searches in the HSA only work by cross-referencing with either the SIMBAD database of (mainly) stellar objects or the NED database of extragalactic objects that both, logically, exclude Solar System Objects. These must be identified using their N...
Helpdesk tickets are linked to your registered e-mail address. This means that the replies will always go to that address until you change it. You can change your e-mail as explained in the following page, under "Edit your user profile": https://www.cos...
We have prepared a short videotutorial to explain to users how to use the Herschel Science Archive User Interface. You can find it here: http://youtu.be/IgGNpUgubkw [http://youtu.be/IgGNpUgubkw]
HSpot will now run only on older computers, for example, those running Windows 7 and earlier and very old versions of Mac. In a nutshell, the JRE (Java Runtime Environment) fails to install on many more recent OS/Platform combinations. However, there is ...
  Classic HSpot will no longer install on recent OS/Platform combinations (for Windows, later than Windows 7; for Mac, only on platforms previous to Mountain Lion; etc.) Technically, the JRE (Java Runtime Environment) fails to install correctly. To allo...
Herschel Helpdesk is not configured to accept e-mail. The address hschelp@sciops.esa.int is a no-reply address that only manages Helpdesk traffic. To send a question you must enter https://support.cosmos.esa.int/herschel/ [https://support.cosmos.esa.int/h...
Assuming that you have watched the Herschel Science Centre short videotutorial called _Starting with PACS Spectroscopy_: https://www.youtube.com/watch?v=rcY487Z9Kyg [https://www.youtube.com/watch?v=rcY487Z9Kyg]  And the Herschel Science Centre short v...
Answer supplied by David Teyssier:   The calibration uncertainties vary from one instrument to another. A summary of those is provided in each of the instrument overview pages, namely: HIFI: https://www.cosmos.esa.int/web/herschel/hifi-overview [htt...
The Herschel Science Centre has produced two simple, step-by-step guides for anyone who would like to perform photometry on a SPIRE image. These give details of how to perform photometry and the corrections that must be performed on the raw photometry. T...
Ancillary Data Products (ADPs) are data products that correspond to an instrument or too the observatory rather than to a single science observation. These include a wide variety of engineering and diagnostic data. The Herschel Science Centre has produced...
Highly processed data products are sets of data that have been reduced by experts working for the Herschel Science Centre because they have issues that makes them extremely difficult to reduce optimally by automatic pipeline, or even by a non-expert in in...
The Herschel Science Archive (HSA) provides a large amount of information in response to a search for observations of a particular target. In particular: * How many observations there are in the HSA for this target, their status and quality. * What p...
  The formal end of Herschel Science Centre support to Herschel activities is 31st December 2017. From then, all support is on a best-efforts basis, although it is expected that there will be a small level of dedicated effort for user support until at l...
The Herschel Explanatory Legacy Library (HELL) can be found at the url: https://www.cosmos.esa.int/web/herschel/legacy-documentation [https://www.cosmos.esa.int/web/herschel/legacy-documentation] It is arranged on three levels hanging from an Explanator...
A series of short, legacy tutorials have been produced, covering all aspects of data reduction, data analysis, the Herschel Science Archive (HSA) and Herschel Legacy documentation. You can find a listing of all available videotutorials here: https://www....
Answered supplied by David Teyssier: The HIFI spatial response is described in the following document: http://herschel.esac.esa.int/twiki/pub/Public/HifiDocsEditableTable/HIFI_Beam_AncillaryDataProducts_ReleaseNotes.pdf [http://herschel.esac.esa.int/t...
There are two, well-known sources of potential problems: First, check that you are using the secure "https" protocol and not "http". If you have the latter, the link will fail. Second, it is possible that the script is searching to the wrong directory b...
There are two, well-known sources of potential problems: First, check that you are using the secure "https" protocol and not "http". If you have the latter, the link will fail. Second, it is possible that the script is searching to the wrong directory b...
Normally the reason is that the e-mail address associated with your profile is no longer valid. You will still be able to see answers if you enter Helpdesk but, logically, the replies sent by e-mail will not arrive. You should update your profile by going...
Even though HSpot is no longer used for preparing and submitting Herschel proposals, it still has many interesting and useful functionalities to examine observations taken with Herschel. We have prepared two short videotutorials that explain on which pla...
Even though most Herschel data is now processed to the highest degree that is possible with the automatic processing pipeline and the results cannot be improved significantly, there are still datasets for which human intervention, particularly in post-pro...
  The Herschel Helpdesk will continue to function after Herschel’s retirement, although, logically, the available support will be more limited than it has been in Operations and post-Operations, so it may on occasion take a little longer to answer quest...
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