| Canonical Name: | Terzan 5 |
| TeVCat Name: | TeV J1747-248 |
| Other Names: | HESS J1747-248 |
| Source Type: | Globular Cluster |
| R.A.: | 17 47 49 (hh mm ss) |
| Dec.: | -24 48 30 (dd mm ss) |
| Gal Long: | 3.78 (deg) |
| Gal Lat: | 1.72 (deg) |
| Distance: | 5.9 kpc |
| Flux: | 0.015 (Crab Units) |
| Energy Threshold: | 440 GeV |
| Spectral Index: | 2.5 |
| Extended: | Yes |
| Size (X): | 0.16 (deg) |
| Size (Y): | 0.03 (deg) |
| Discovery Date: | 2011-07 |
| Discovered By: | H.E.S.S. |
| TeVCat SubCat: | Default Catalog |
Source Notes:
| H.E.S.S. Galactic Plane Survey (HGPS, 2018): |
| A selection of information for each of the 78 sources in the HGPS is provided in TeVCat. For full details, visit the HGPS website. |
| Name: | HESS J1747-248 |
| Source Class: | Unid |
| Identified Object: | None |
| R.A. (J2000): | 266.96 deg (17 47 50) |
| Dec. (J2000): | -24.82 deg (-24 48 56) |
| Positional uncertainty: | 0.034 deg |
| Spatial Model: | Gaussian |
| Size: | 0.061 +/- 0.012 deg |
| Spectral Model: | power law |
| Integral Flux > 1 TeV: | 2.66e-13 +/- 4.35e-14 cm-2 s-1 |
| Pivot Energy, E0: | 1.27 TeV |
| Diff. Flux at E0: | 2.05e-13 +/- 3.02e-14 cm-2 s-1 TeV-1 |
| Spectral Index: | 2.36 +/- 0.14 |
| HGPS Source Notes: | |
| | |
Two possible associations are listed in Table A.9. "This is a list of astronomical objects, extracted from catalogs of plausible counterparts,
which are are found to be spatially coincident with the HGPS source":
- 3FGL J1748.0-447 (3FGL)
- Terzan 5 (EXTRA)
"EXTRA associations: For completeness, in addition to the associations obtained through the catalog-based, automatic procedure, we add a list of 20 extra
associated objects that are plausible counterparts for some HGPS sources and are not covered by the limited set of catalogs we use."
Source Association:
From
Funk et al. (2012):
- "This ICRC has seen a report of a possible detection of the globular
cluster Terzan 5 with H.E.S.S. at higher energies ... The slight
offset of the gamma-ray emission from the center of globular cluster
and the rather large extension of the emission is challenging for the
Globular cluster interpretation. The chance coincidence is however
quoted at the level of 10e-4"
From
Abramowski et al. (2011):
- "...it is unlikely that the association of the VHE gamma-ray source
and the GC is by chance, but due to simplifications in the probability
estimation, such a possibility cannot firmly be excluded."
Source Location
From
Abramowski et al. (2011):
- R.A. (J2000): 17h 47m 49s +/- 1.8s(stat) +/- 1.3s(syst)
- Dec. (J2000): -24d 48m 30s +/- 36"(stat) +/- 20"(syst)
Source Extent:
From
Abramowski et al. (2011):
- major axis: 9.6' +/- 2.4'(stat)
- minor axis: 1.8' +/- 1.2'(stat)
- orientation: 92deg +/- 6deg westwards from North
Spectral Properties:
From
Abramowski et al. (2011):
- Spectral index: 2.5 +/- 0.3(stat) +/- 0.2(syst)
Seen by: H.E.S.S.
-
On the manifest link between Terzan 5 and the Galactic bulge
Origlia, L. et al., arXiv e-prints parXiv:2503.17258 (2025) [LINK]
-
A deep Chandra study verifies diffuse non-thermal X-ray emission from the globular cluster Terzan 5
Zhao, Jiaqi et al., arXiv e-prints parXiv:2412.03788 (2024) [LINK]
-
The star formation history of the first bulge fossil fragment candidate Terzan 5
Crociati, Chiara et al., arXiv e-prints parXiv:2410.16971 (2024) [LINK]
-
Discovery and timing of ten new millisecond pulsars in the globular cluster Terzan 5
Padmanabh, P.V. et al., A&A 686 pA166 (2024) [LINK]
-
Pulse Profiles and Polarization of Terzan 5 Pulsars
Martsen, Ashley R. et al., arXiv e-prints parXiv:2204.06158 (2022) [LINK]
-
Is Terzan 5 the remnant of a building block of the Galactic bulge? Evidence from APOGEE
Taylor, Dominic J. et al., arXiv e-prints parXiv:2204.01753 (2022) [LINK]
-
The MAVERIC Survey: New compact binaries revealed by deep radio continuum observations of the Galactic globular cluster Terzan 5
Urquhart, Ryan et al., arXiv e-prints parXiv:2009.07286 (2020) [LINK]
-
Exploring the Mass Segregation Effect of X-Ray Sources in Globular Clusters. II. The Case of Terzan 5
Cheng, Zhongqun et al., ApJ 883 p90 (2019) [LINK]
-
Probing the pulsar population of Terzan 5 via spectral modeling
Ndiyavala, Hambeleleni et al., arXiv e-prints parXiv:1905.10229 (2019) [LINK]
-
Gamma-ray emission from high Galactic latitude globular clusters
Lloyd, S.J. et al., MNRAS 480 p4782-4796 (2018) [LINK]
-
The MAVERIC Survey: A Transitional Millisecond Pulsar Candidate in Terzan 5
Bahramian, A. et al., ApJ 864 p28 (2018) [LINK]
-
Discovery of three new millisecond pulsars in Terzan 5
Cadelano, M. et al., ArXiv e-prints p (2018) [LINK]
-
Investigating gamma-ray fluxes from globular clusters
Ndiyavala, H. et al., ArXiv e-prints p (2017) [LINK]
-
A Tidal Capture Formation Scenario for the Accreting Pulsar IGR J17480-2446 in Terzan 5
Patruno, A. and Mapelli, M., ArXiv e-prints p (2017) [LINK]
-
Misaligned TeV gamma-ray sources in the vicinity of globular clusters
Bednarek, W. and Sobczak, T., ArXiv e-prints p (2014) [LINK]
-
Numerical modelling of gamma-ray emission produced by electrons originating from the magnetospheres of millisecond pulsars in globular clusters
Zajczyk, A. et al., ArXiv e-prints p (2013) [LINK]
-
Terzan 5: a Fossil Remnant of the Galactic Bulge
Massari, D. et al., ArXiv e-prints p (2013) [LINK]
-
Search for Very-high-energy gamma-ray emission from Galactic globular clusters with H.E.S.S
H.E.S.S. Collaboration et al., ArXiv e-prints p (2013) [LINK]
-
Discovery of VHE gamma-ray emission from the direction of the globular cluster Terzan 5
Domainko, W. et al., ArXiv e-prints p (2011) [LINK]
-
Finding short GRB remnants in globular clusters: the VHE gamma-ray source in Terzan 5
Domainko, W.F., A&A 533 pL5 (2011) [LINK]
-
Very-high-energy gamma-ray emission from the direction of the Galactic globular cluster Terzan 5
H.E.S.S.Collaboration et al., A&A 531 pL18 (2011) [LINK]
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