Suzaku confirms NGC 3660 is an unabsorbed Seyfert 2
Abstract
An enigmatic group of objects, unabsorbed Seyfert 2s may have intrinsically weak broad line regions, obscuration in the line of sight to the BLR but not to the X-ray corona, or so much obscuration that the X-ray continuum is completely suppressed and the observed spectrum is actually scattered into the line of sight from nearby material. NGC 3660 has been shown to have weak broad optical/near-infrared lines, no obscuration in the soft X-ray band, and no indication of "changing look" behavior. The only previous hard X-ray detection of this source by Beppo-SAX seemed to indicate that the source might harbor a heavily obscured nucleus. However, our analysis of a long-look Suzaku observation of this source shows that this is not the case, and that this source has a typical power-law X-ray continuum with normal reflection and no obscuration. We conclude that NGC 3660 is confirmed to have no unidentified obscuration and that the anomolously high Beppo-SAX measurement must be due to source confusion or similar, being inconsistent with our Suzaku measurements as well as non-detections from Swift-Burst Alert Telescope (BAT) and Rossi X-ray Timing Explorer (RXTE).
Additional Information
© The Author 2016. Published by Oxford University Press on behalf of the Astronomical Society of Japan. Received 2015 November 7; Accepted 2015 December 17. This research has made use of data obtained from the Suzaku satellite, a collaborative mission between the space agencies of Japan (JAXA) and the USA (NASA). This work has made use of HEASARC online services, supported by NASA/GSFC, and the NASA/IPAC Extragalactic Database, operated by JPL/California Institute of Technology under contract with NASA. This work was supported under NASA Contract No. NNG08FD60C and sub-contract No. 44A-1092750.Attached Files
Submitted - 1601.02702v1.pdf
Files
Name | Size | Download all |
---|---|---|
md5:9f82c52499834ceaab8c645c92428ae8
|
308.5 kB | Preview Download |
Additional details
- Eprint ID
- 68805
- DOI
- 10.1093/pasj/psv137
- Resolver ID
- CaltechAUTHORS:20160701-095928597
- NASA/JPL/Caltech
- NNG08FD60C
- NASA
- 44A-1092750
- NASA
- Created
-
2016-07-01Created from EPrint's datestamp field
- Updated
-
2021-11-11Created from EPrint's last_modified field