| Canonical Name: | HAWC J0635+070 |
| TeVCat Name: | TeV J0634+070 |
| Other Names: | PSR J0633+0632
3HWC J0634+067
1LHAASO J0635+0619 |
| Source Type: | TeV Halo |
| R.A.: | 06 34 50.4 (hh mm ss) |
| Dec.: | +07 00 00 (dd mm ss) |
| Gal Long: | 204.81 (deg) |
| Gal Lat: | -0.48 (deg) |
| Distance: | |
| Flux: | (Crab Units) |
| Energy Threshold: | GeV |
| Spectral Index: | 2.15 |
| Extended: | Yes |
| Size (X): | 0.65 (deg) |
| Size (Y): | 0.65 (deg) |
| Discovery Date: | 2018-09 |
| Discovered By: | HAWC |
| TeVCat SubCat: | Default Catalog |
Source Notes:
This source discovery as announced on 180906 in an
ATel.
From
Brisbois et al. (2018):
- "The High Altitude Water Cherenkov (HAWC) collaboration reports the
discovery of a new TeV gamma-ray source HAWC J0635+070. It was
discovered in a search for extended sources covering 1128 days of HAWC
observations with a test statistic value of 27 (>5σ pre-trials),
following the method presented in [Abeysekara et al. 2017, ApJ, 843,
40]. Its significance in the 2HWC data set excluded it from being
included in the catalog (~3.5σ pre-trials), but with the addition of
~600 more days of data it now satisfies that criterion."
Source Position:
From
Brisbois et al. (2018):
- R.A. (J2000): 98.71 +/- 0.20 deg (06h 34m 50.4s)
- Dec. (J2000): 7.00 +/- 0.22 deg (07d 00' 00'')
Source Extent:
From
Brisbois et al. (2018):
- the source has a Gaussian 1-sigma extent of 0.65 +/- 0.18 deg
Spectral Properties:
From
Brisbois et al. (2018):
- "The spectral energy distribution is well-fit by a power law with
spectral index -2.15 +/- 0.17. The differential flux at 10 TeV is
(8.6 +/- 3.2) 10e-15 TeV-1 cm-2 s-1. All errors are statistical only;
further morphological and spectral analysis as well as studies of the
systematic uncertainty are ongoing."
Source classification:
From
Albert et al.<.a>:
- "3HWC J0634+067 (TS = 36.2) had been previously announced as
HAWC J0635+070 (Brisbois et al. 2018) - a potential TeV halo around the
pulsar PSR J0633+0632.1"
From
Brisbois et al. (2018):
- "Given its spectrum and morphology, we believe HAWC J0635+070 may be
the TeV halo of the pulsar PSR J0633+0632 (Edot = 1.2e+35 erg s-1,
dist = 1.35 kpc, age = 59 kyr, unknown proper motion (
Manchester et al. 2005).
The gamma-ray spectrum and morphology is compatible with a
"Geminga-like" TeV Halo (
Abeysekara et al. 2017
Linden et al. 2017)"
Seen by: HAWC, LHAASO
-
The First LHAASO Catalog of Gamma-Ray Sources
Cao, Zhen et al., ApJS 271 p25 (2024) [LINK]
-
Gamma-ray Pulsar Halos in the Galaxy
Fang, Kun, arXiv e-prints parXiv:2209.13294 (2022) [LINK]
-
3HWC: The Third HAWC Catalog of Very-high-energy Gamma-Ray Sources
Albert, A. et al., ApJ 905 p76 (2020) [LINK]
-
TeV Halos are Everywhere: Prospects for New Discoveries
Sudoh, T. et al., arXiv e-prints p (2019) [LINK]
-
HAWC detection of TeV source HAWC J0635+070
Brisbois, C. et al. on behalf of the HAWC Collaboration, The Astronomer's Telegram 12013 p1 (2018) [LINK]
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