Live Chat Software by Kayako |
|
Herschel Science Centre e-News#43
Posted by h schelp on 12 July 2019 06:01 PM |
|
|
#######################################
Herschel Science Centre e-News#43 12 July 2019
#######################################
New Highly Processed Data Products (HPDPs) available in the Herschel Science Archive Four new HPDPs (Highly Processed Data Products generated by experts) have been ingested in the Herschel Science Archive, representing products of higher quality than those generated by the standard instrument pipelines, or complementary to them. The newly ingested HPDPs consist of a collection of HIFI spectral maps interactively reduced with improved spectral baselines, cleaned for standing waves and corrected for possible off-position contamination; improved SPIRE photometry maps suffering from low-level residual striping and identified through visual inspection by instrument specialists; PACS spectroscopy observations corrected for slight pointing offsets; plus uncalibrated PACS observations in the blue edge (50 to 55 microns) of the spectral range covered by the instrument. HIFI Expert Reduced Maps: HIFI spectral maps interactively reduced with improved spectral baselines, cleaned for standing waves and corrected for possible off-position contamination, starting with Level 2 products, minimising data artifacts and maximising signal-to-noise ratios. The main interactive processing steps, applied to 768 HIFI observations, involved: 1. Corrections for strong standing waves or drift in the spectral dataset baselines; 2. Product merging: H and V polarization signal output products from a single observation, and across multiple observations; 3. Spatial resampling of the mapping grid; 4. Inspection for sky reference (off-source) line contamination; and 5. Production of optimal browse-quality spectra and integrated line or channel maps. Web page: https://www.cosmos.esa.int/web/herschel/hifi-spectral-maps-hpdp Release Note: http://archives.esac.esa.int/hsa/legacy/HPDP/HIFI/HIFI_spectral_maps/HIFI_Spectral_Maps_HPDP_Release_Note_v1.2.pdf Data repository: http://archives.esac.esa.int/hsa/legacy/HPDP/HIFI/HIFI_spectral_maps/ SPIRE Improved Photometry Maps: A collection of 47 improved SPIRE photometry maps, most of them corresponding to large deep fields, suffering from low-level residual striping and identified through visual inspection by instrument specialists. The effect is more pronounced in dark fields where the sources are faint and close to the confusion limits. The residual striping can be alleviated by using the destriper with a higher order polynomial, and this was the method used to generate these improved maps. Web page: https://www.cosmos.esa.int/web/herschel/spire-improved-maps-hpdp Release Note: http://archives.esac.esa.int/hsa/legacy/HPDP/SPIRE/SPIRE-S/spectral_feature_catalogue/README.html Data repository: http://archives.esac.esa.int/hsa/legacy/HPDP/SPIRE/SPIRE-P/IMPROVED_MAPS/destriped_P1/ PACS Point Source Spectra Corrected for Pointing Offsets: The point-source calibrated PACS spectra generated by the standard pipeline are derived assuming that the point sources observed are perfectly centred in the FoV of PACS. However, for sources that were observed not well centred, these products are not necessarily the best to use, as they will provide an underestimate of the actual flux of your source. The “Pointing Offset Correction” (POC) pipeline used for the generation of this HPDP is an alternative full data-reduction pipeline similar to the standard pipeline for the same PACS observing mode, but it has additional pointing-offset correction tasks that provide better spectra of point sources affected by small pointing offsets. These tasks attempt to determine the offset of a point source from the centre of the PACS FoV and to correct the flux of the cube accordingly. The end result is a better calibrated point-source spectrum. Generally-speaking, this POC pipeline is best suited to bright sources, and produces better spectra for point sources that are offset from the central spaxel, but still located within the central 3x3 spaxels, of a rebinned cube. Web page: https://www.cosmos.esa.int/web/herschel/pacs-poc-spectra-hpdp Release Note: http://archives.esac.esa.int/hsa/legacy/HPDP/PACS/PACS-S/poc_spectra/PACSS_POCHPDP_Release_Note.pdf Data repository: http://archives.esac.esa.int/hsa/legacy/HPDP/PACS/PACS-S/poc_spectra/products/ PACS Blue Edge Uncalibrated Spectra: A collection of 1114 PACS spectra in the blue edge (50 to 55 μm) of the spectral range covered by the instrument. These data can be processed by the standard pipelines although the flux calibration is unreliable. Despite their possible use for science being very limited, as many caveats need to be considered in their analysis, they are provided for completeness and to allow at least a quick visual inspection of potential strong features that may be detectable in this spectral range that otherwise would escape the attention of interested researchers for further follow-up with other facilities. Web page: https://www.cosmos.esa.int/web/herschel/pacs-blue-edge-hpdp Release Note: http://archives.esac.esa.int/hsa/legacy/HPDP/PACS/PACS-S/blue_edge/PACSS_BlueEdgeHPDP_Release_Note.pdf The full list of HPDPs currently ingested in the Herschel Science Archive or planned for ingestion in the near future is available at: http://www.cosmos.esa.int/web/herschel/highly-processed-data-products ESA Astronomy Science Archives Survey Do you use any of the ESA Astronomy science archives or ESASky? If yes, we are looking for your feedback! We are conducting a short survey in an effort to ensure that the Astronomy community are provided with the best possible services from the ESA Astronomy science archives. We would therefore be very grateful if you could spend a few minutes of your time filling in the survey, which includes questions on the archives of EXOSAT, Gaia, Herschel, HST, ISO, Lisa Pathfinder, Planck, and XMM-Newton, and on the ESASky tool. The survey should not take more than 5 minutes to complete and at the end there are optional free text questions where you can provide us with more detailed feedback. Link to the survey: https://www.surveymonkey.com/r/SW8Q2GZ The results from the survey will be used to better understand the needs of the community and to improve our archives and long-term strategy accordingly. Many thanks for your collaboration! SOFIA Observatory Cycle 8 Calls for Proposals The SOFIA Observatory, the only aircraft-based facility offering an access to the 4-600 µm wavelength range, has recently released calls for proposals for the Cycle 8 period, with a deadline of 6 September 2019 (9 p.m. PDT). Anyone in the astronomy scientific community is welcome to apply for time. In this observing Cycle, we are offering:
The selection results will be announced in December of 2019. Good luck! The Herschel Science Centre Helpdesk https://www.cosmos.esa.int/web/herschel/helpdesk ===================================================================== You are subscribed to the Herschel Mailing List. To unsubscribe, please edit your notification levels at: https://www.cosmos.esa.int/web/herschel/registration ===================================================================== --------------------------------------------------------------------- IMPORTANT: This email account is not configured to receive messages. To react to this message you must use the online web interface at: https://www.cosmos.esa.int/web/herschel/helpdesk --------------------------------------------------------------------- | |
Comments (0)