INTEGRAL All-sky survey: NGC 4388 (AGN)
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INTEGRAL IBIS/ISGRI light curveHistogram of the Flux Distribution
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NGC 4388
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NGC 4388
Plot description: Histogram of the source flux averaged over s/c orbit (see lightcurve on the left). The flux bin [1,5] mCrab contains counts from range [-5,5] mCrab. The flux measurements with error >5 mCrab were dropped.
Plot description: The blue data points show source flux over one s/c orbit (3 days). The all time-averaged flux and corresponding 1σ errors are shown in red. The star symbol is shown when flux error is greater than 5 mCrab and detection significance is less than 3σ.
Please refer to this catalog as: Krivonos et al., 2007, A&A, 475, 775 [NASA ADS]
glonglat17-60 keV, Flux1,2,3
NGC 4388186.44412.664 -80.879 74.335 12.42 ± 0.17 73.06AGN Sy2 z=0.008426;
Flux on the all-time-averaged sky map (mCrab): 12.42 ± 0.17, shown above in red.Effective dead-time corrected exposure time (ks): 765
See also nominal (scheduled) time at the source position
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Last updated: May 27 2011
  1. Time-averaged source flux in mCrab units. A flux of 1 mCrab corresponds to 1.43e-11 erg/s/cm2 for a source with a Crab-like spectrum.
  2. Source flux was measured on the map averaged over the indicated spacecraft revolution.
  3. General astrophysical type of the object. LMXB (HMXB) - low- (high-) mass X-ray binary, AGN - active galactic nucleus, SNR/PWN - supernova remnant/pulsar wind nebula CV - cataclysmic variable, PSR - isolated pulsar or pulsar wind nebula, SGR - soft gamma repeater, RS CVn - coronally active binary star, SymbStr - symbiotic star, MolCld - Molecular cloud, Cluster - cluster of galaxies.
  4. Additional notes and/or alternative source names. References are mainly provided for new sources and are related to their discovery and/or nature.
Notes on catalog
  • The positional accuracy of sources detected by IBIS/ISGRI depends on the source significance. The estimated 68% confidence intervals for sources detected at 5-6, 10, and > 20 standart deviations are 2.1, 1.5, and < 0.8 arcmin, respectively.
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