skip to content


 
NASA Home PageGoddard Space Flight Center Home Page
NASA Logo - Goddard Space Flight Center  + NASA Homepage
 + Sciences & Exploration Directorate
 + Exploration of the Universe Division

... this could take a while...
Tartarus Home Tartarus at Imperial College London ASCA Sequence List
70021000 NGC 4945
DETECTED

Object Information and Products

Object name : NGC 4945
RA (J2000) : 13 05 27.60
Dec (J2000) : -49 28 03.0
Detection significance : 171.48 sigma
Download Products (Full description of products)
All 70021000_v3.1_all.tar.gz Description
Imaging 70021000_v3.1_image.tar.gz Description
Spectral 70021000_v3.1_spectral.tar.gz Description
Timing 70021000_v3.1_timing.tar.gz Description


Observing Times
Elapsed (s) Exposure (s)
SIS0 63296 6378
SIS1 66461 15601
GIS2 66640 41807
GIS3 66640 41823

Observation Information

Sequence : 70021000
ASCA object name : NGC4945
Start date : 31 Aug 1993
Start time : 13:36:20
Start MJD : 49230.56691
SIS clocking mode : 4 CCDs
SIS data mode : BRIGHT
GIS3 channels : 1024
Event threshold : The effective event threshold is constant.
Link to official ASCA Data Facility processing page


GIS Sky Images and Veron 2001 Objects

GIS2 Detection Image GIS Rebinned Image Veron Objects
GIS2 image with detection regions Binned GIS image with nominal RA/Dec Smoothed GIS image with Veron objects and centroid
jpeg gif jpeg gif jpeg gif


Veron Name
(with NED link) 		RA (J2000) Dec (J2000) Redshift Type
NGC 4945 13 05 27.60 -49 28 03.0 0.002 SEYFERT
Link to all NED objects in GIS field-of-view


Detector Images, Extraction Regions and Counts

Detector Detector Images Source
Region
Counts 		Scaled
Background
Counts 		Background
Subtracted
Counts 		Background
Subtracted
Rate
Unsmoothed Smoothed (counts) (counts) (counts) (counts s-1)
SIS0 Unsmoothed SIS0 detector image
jpeg gif 		Smooothed SIS0 detector image
jpeg gif 		526 77.5 448.5 7.03e-02
SIS1 Unsmoothed SIS1 detector image
jpeg gif 		Smooothed SIS1 detector image
jpeg gif 		1013 153.0 860.0 5.51e-02
GIS2 Unsmoothed GIS2 detector image
jpeg gif 		Smooothed GIS2 detector image
jpeg gif 		4864 960.5 3903.5 9.34e-02
GIS3 Unsmoothed GIS3 detector image
jpeg gif 		Smooothed GIS3 detector image
jpeg gif 		5119 991.5 4127.5 9.87e-02


Spectral Fitting Results

Energy
Band 		Spectrum NH Photon
Index 		Red. Chi2
/ DOF 		Prob. to
Exceed 		SIS0 Flux
(cm-2) (erg cm-2 s-1)
Full Full-band spectral fit no absorption Unabsorbed
Model 		1.31 1.29 / 229 2.21e-03 3.77e-12
Full Full-band spectral fit with absorption 2.35e+21 1.58 1.10 / 228 1.42e-01 3.43e-12
Soft Soft-band spectral fit no absorption Unabsorbed
Model 		0.85 1.05 / 89 3.55e-01 7.55e-13
Soft Soft-band spectral fit with absorption 0.00e+00 0.85 1.06 / 88 3.27e-01 7.59e-13
Hard Hard-band spectral fit no absorption Unabsorbed
Model 		1.55 1.04 / 131 3.48e-01 3.01e-12
Hard Hard-band spectral fit with absorption 5.24e+21 1.73 1.04 / 130 3.66e-01 2.91e-12
Galactic NH 1.57e+21


Light Curve

Full-band SIS light curve Combined SIS0 + SIS1 0.5-10 keV light curve


Log File and Warnings

Log file

2005.06.21.22:56.70021000.seq

Warnings

No warnings

Missing products

All products are available


Previous Sequence
70020000
Next Sequence
70022000


A service of the Exploration of the Universe Division (EUD) at NASA's GSFC

  • Astronomy Questions? Ask an Astrophysicist.
  • NASA-specific Questions? Try the NASA Homepage

  • Download helper applications like Acrobat Reader.

    • FirstGov logo + Privacy Policy and Important Notices NASA Curator: Jane Turner
    NASA Official: Phil Newman
    Last Updated: Monday, 25-Jul-2005 15:16:10 EDT