This site will be out of service for maintenance on Monday, May 6 from 7:30 to 8:00.

New NGC 6440 transient declining rapidly

Bibcode
2009ATel.2143....1H
Heinke, C. O.; Budac, S. A.; Altamirano, D.; Linares, M.; Wijnands, R.; Cohn, H. N.; Lugger, P. M.; Strohmayer, T. E.; Servillat, M.; Grindlay, J. E.
Bibliographical reference

The Astronomer's Telegram, #2143

Advertised on:
8
2009
Number of authors
10
IAC number of authors
0
Citations
5
Refereed citations
2
Description
The new transient LMXB in NGC 6440 (CXOGlb J174852.7-202124; Atel #2139) is declining rapidly. RXTE observed NGC 6440 on July 30 (18:47 to 19:26 TT). The PCA top-layer spectrum is well fit with an absorbed power-law of photon index 2.2+-0.1, with N_H set to 6e21 cm^-2 (as found by Chandra). The inferred 0.5-10 keV luminosity is 4e35 ergs/s, a decline by a factor of 3.5 from the Chandra observation ~2 days earlier.
Type
Non-refereed
Neutron stars

It may interest you

  • Non-refereed
    Estimation of the hydrostatic-to-lensing mass bias from resolved cluster masses

    We present a study on the bias of hydrostatic masses with respect to lensing mass estimates for a sample of 53 clusters in a redshift range between z = 0.05 and 1.07. The M 500 mass for each cluster was inferred from X-ray and lensing data, without using a priori observable-mass scaling relations. Cluster masses of our reference analysis were

    Muñoz-Echeverría, M. et al.

    Advertised on:

    6
    2024
    Bibcode
    2024EPJWC.29300033M
    Citations
    0
  • Non-refereed
    IRAM 30-meter millimeter follow-up of deep OSIRIS-GTC optical surveys

    It is broadly accepted that CO is a reliable tracer of H2 in massive IR (L IR ≳ 10 9 L ⊙) galaxies, and that there are clear correlations between L IR and L' CO that are qualitatively independent of environment and even redshift. We present two tales on the search for 12CO emission from dusty star-forming galaxies in both field (Lockman Hole, z < 0

    Sánchez-Portal, M. et al.

    Advertised on:

    6
    2024
    Bibcode
    2024EPJWC.29300047S
    Citations
    0
  • Non-refereed
    The NIKA2 Sunyaev-Zeldovich Large Program. Sample and upcoming product public release

    The NIKA2 camera operating at the IRAM 30-m telescope excels in high-angular resolution mapping of the thermal Sunyaev-Zel'dovich effect towards galaxy clusters at intermediate and high-redshift. As part of the NIKA2 guaranteed-time, the SZ Large Program (LPSZ) aims at tSZ-mapping a representative sample of SZ-selected galaxy clusters in the

    Perotto, L. et al.

    Advertised on:

    6
    2024
    Bibcode
    2024EPJWC.29300040P
    Citations
    0