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INTEGRAL observations of V404 Cyg (GS 2023+338): public data products

ATel #7758; Erik Kuulkers (INTEGRAL Project Scientist, ESA/ESAC, Spain), on behalf of a larger collaboration
on 3 Jul 2015; 12:37 UT
Credential Certification: Erik Kuulkers (Erik.Kuulkers@sciops.esa.int)

Subjects: Optical, X-ray, Gamma Ray, Binary, Black Hole, Transient, Variables

Referred to by ATel #: 7959, 8512

As announced in ATel #7695, INTEGRAL is performing public Target-of-Opportunity observations of the black-hole binary X-ray transient V404 Cyg (GS 2023+338). So far, public data were collected in the periods June 17-20 (see ATels #7662, #7693, #7726) and June 26 - July 3 (e.g., ATel #7731). INTEGRAL will continue to monitor the source until further notice, interspersed with other observations.

As a service to the community, especially meant to help multi-wavelength data comparisons, the ISDC Data Centre for Astrophysics (University of Geneva, Switzerland), with the support of members of the instrument teams, is providing ready-to-use scientific data products of all publicly available observations of the source (light curves and spectra obtained by the SPI, IBIS, and JEM-X instruments, as well as V-band light curves for the OMC instrument). All relevant information and data files can be retrieved from the repository linked at the bottom of this Telegram. We caution that these data products are based on preliminary data and analysis; the response of the (X-ray/gamma-ray) instruments at the very high count rates encountered is different than normal, and work is in progress to understand the issues. As this analysis progresses, the information will be updated.

We kindly ask anyone making use of these INTEGRAL data products to cite this Telegram.

Note that a pre-approved ToO programme on V404 Cyg took place in the period June 20-25 (PI: Rodriguez; see ATels #7702, #7717). Thanks to the PI, these data will be made publicly available near the end of July (see ATels #7695, #7702), and will be retrievable from the same repository mentioned before.

We thank the INTEGRAL instrument teams and the Science Ground Segment for their huge effort in making the data products available and to provide the best calibration files possible.