INTEGRAL Latest News

INTEGRAL TOO observations of MAXI J0911-655

21 April 2016 MAXI J0911-655 (aka Swift J0911.9-6452) is a new X-ray transient first detected on February 2016 at a position compatible with the globular cluster NGC 2808 (Atel #8872, 8884). INTEGRAL TOO observations in revolution 1671 (2016-04-23 23:43:40 to 2016-04-25 06:51:22) are being undertaken in coordination with XMM-Newton.

14th Announcement of Opportunity (AO-14): preliminary statistics

14 April 2016 The deadline for the submission of proposals for AO-14 open time observations was on 8 April 2016, and all proposals are in the ISOC database. Below are some preliminary statistics on the proposals that have been received.

Total number of proposals
The total number of proposals received is 57. The total observing time requested is about 115 Msec (for all types of observation, i.e., fixed time, normal time, and ToO). Here, 10% of the requested total ToO time has been taken into account. Given that up to about 21 Msec of observing time (for new observing proposals) will be available for the AO-14 observing programme (12 months duration starting on 1 January 2017), this corresponds to an oversubscription in time by a factor of 5.5.

The non-ToO proposals are requesting data rights for 359 sources in total. 12 proposals requested coordinated time with NuSTAR, Swift and/or XMM-Newton.

Proposals per category
In the following table we give the breakdown of number of proposals as a function of the proposal category. Note that the numbers on requested observing times do include ToO proposals, but it has been assumed here, that a typical ToO proposal requests about 10% of its total observing time as entered into PGT from all the candidate sources included in a ToO proposal.

Scientific Category Number of proposals Requested observing time (Ms)
includes ToO times x 10%
Galactic Astronomy 32 54
Extragalactic Astronomy 14 17
Nucleosynthesis and diffuse
continuum/line emission
11 44
Total 57 115


In mid May, the Time Allocation Committee will peer review all proposals and recommend the AO-14 observing programme to ESA.

INTEGRAL sets limits to gamma rays from merging black holes

30 March 2016 Following the discovery of gravitational waves from the merging of two black holes, INTEGRAL has revealed no simultaneous gamma rays, just as models predict. See the ESA press release.

INTEGRAL instruments shut off over Easter

29 March 2016 On Saturday 26 February a Single Event Upset on one of the Payload Module Power Distribution Units resulted in all instruments being suddenly switched off. The Flight Control Team at ESOC has been working hard and the instruments are being activated again one after the other.

Gust of antimatter in V404 Cygni (GS 2023+238)

1 March 2016 A team lead by the Max-Planck-Institut für extraterrestrische Physik (MPE) in Garching, Germany, together with the Astrophysics division/laboratory AIM of CEA-Irfu report the discovery of intense bursts of photons at energy around 511 keV from V404 Cyg, which is interpreted as the signature of the annihilation of an electron with its anti-particle, the positron. Their findings were published yesterday in Nature. See also the Press releases by MPE and SAp.

INTEGRAL AO-14 Call for Observing Proposals is open!

29 February 2016 Today, the Director of Science (Prof. Alvaro Giménez Cañete) has released the 14th Announcement of Opportunity for observing proposals with INTEGRAL.

This announcement solicits proposals for observations to be carried out from January 2017 for a period of 12 months. Proposers from all over the world are welcome to participate. All proposals will be subject to an independent peer review by the INTEGRAL Time Allocation Committee (TAC). The deadline for proposal submission is Friday 8 April 2016, 14:00 CEST.

We would like to draw your attention to the following points:

  • ESA now provides the opportunity to propose for coordinated observations with NASA's NuSTAR telescope within a total of 100 ks available time. The opportunity to propose for coordinated observations with XMM-Newton and/or NASA's Swift satellite continues as before. Note that through an agreement with ESA, the Fermi project of NASA offers the possibility to obtain observing time with INTEGRAL through a single proposal to NASA via the Fermi AO.
  • Data or science rights to the targets or science in the field of view (FOV) of the instruments will be allocated to PIs of accepted proposals with the usual 1-year proprietary period. If the PI is from a country other than the Russian Federation, the rest of the field will be made public immediately. Proposals where the PI is from the Russian Federation follow a similar kind of policy, except that the rest of the field will be made public only through the consolidated data programme. The Russian Federation scientists currently working at Russian Federation scientific institutes still have exceptional access to the near-real time data of the rest of the field.
  • The INTEGRAL Project has signed a Memorandum of Understanding (MoU) with the LIGO/Virgo consortium to participate to the electro-magnetic follow-up campaign of GW signals until 1 June 2017; a renewal will be discussed in due time.
  • Observations with non-standard, custom patterns, such as the GPS and Galactic scans, generally reduce scheduling efficiency, and increase workload for both the ISOC and the Mission Operations Centre. The use of non-standard patterns is now strongly discouraged. Hence custom patterns will be considered only for the highest, A-grade, proposals, and their scheduling will be done on a best effort basis.
  • Following a recommendation by the IUG it is possible to submit Key Programme proposals with observations spanning two AO cycles of observations.
  • Finally, we would like to remind you that there is no second call for proposals requesting data rights (so-called data rights proposals). Therefore, we strongly encourage you to submit any data rights proposals as observing time proposals in this and future AOs; amalgamation has been made more flexible.

More information can be found on the AO-14 page.

INTEGRAL X-rays Earth's aurora

26 January 2016 Normally busy with observing high-energy black holes, supernovas and neutron stars, INTEGRAL recently had the chance to look back at our own planet's aurora.

Change in Russian Federation data rights

13 January 2016 Last year, the Russian Advisory Committee (RAC) for INTEGRAL agreed with proposed changes to the data rights policy with regard to Russian Federation proposals in AO-13. Data or science rights to the targets or science in the field of view (FOV) of the instruments proposed by the PIs from the Russian Federation and accepted by the TAC will be allocated to these PIs with the usual 1-year proprietary period. However, the rest of the field will be made public to the community at-large through the consolidated data programme, i.e., having a policy similar to that for non-Russian Federation proposals. Russian PIs still have exceptional access to the near-real time data of their observations. This policy change is in effect from January 1. Note that the guaranteed return to the Russian Federation science community from the open time programme stays 25%.

IBIS restart in revolution 1633

12 January 2016 In order to fix the PICsIT histogram malfunction (see news from 18 December), the IBIS instrument will be fully deactivated and restarted in Revolution 1633, which is dedicated to the study of diffuse emission with SPI. The procedure is set to start on 14 January 6:30Z and to be finished around 19:00Z on 15 January.

AO-13 observations and preparations for AO-14 started

11 January 2016 ISOC wishes you a healthy and successful 2016. The AO-13 cycle of observations started on January 1st and will last 12 months, see the INTEGRAL target lists and sky maps for details as well as the Long-Term Plan.

ISOC is preparing the next call for proposals requesting INTEGRAL observing time. The AO-14 release will be on 29 February, with a deadline on 8 April 2016. The AO-14 cycle of observations is foreseen to begin on 1 January 2017 and has the usual duration of 12 months.

Release of AO-14: call for observing time proposals:   29 February 2016
Deadline for submission of observing time proposals:   8 April 2016 (14:00 CEST)
Meeting of the Time Allocation Committee:   17-19 May 2016
Start of AO-14 cycle of observations:   1 January 2017


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