| Canonical Name: | PKS 1441+25 |
| TeVCat Name: | TeV J1443+250 |
| Other Names: | |
| Source Type: | FSRQ |
| R.A.: | 14 43 56.9 (hh mm ss) |
| Dec.: | +25 01 44 (dd mm ss) |
| Gal Long: | 34.56 (deg) |
| Gal Lat: | 64.70 (deg) |
| Distance: | z=0.939 |
| Flux: | 0.16 (Crab Units) |
| Energy Threshold: | 80 GeV |
| Spectral Index: | |
| Extended: | No |
| Discovery Date: | 2015-04 |
| Discovered By: | MAGIC |
| TeVCat SubCat: | Default Catalog |
Source Notes:
The source was moved from the "Newly Announced" to the "Default"
catalogue on 151215 after the publication of its detection
by
Abeysekara et al. (2015) and
Ahnen et al. (2015).
This detection was announced in an
ATel during a time when the source
had entered an exceptionally high state at optical, X-, and Gamma-ray
frequencies (
ATel #7402), which triggered the MAGIC observations.
This source was subsequently detected by
VERITAS above 80 GeV.
Positional Information:
From
Abeysekara et al. (2015)
- PKS 1441+25 is detected at a position consistent with its radio
location
- a recent radio location from
Petrov et al. (2012) is
the same as that listed for this source in NED:
- R.A. (J2000): 14h 43m 56.9s
- Dec. (J2000): +25 d01m 44s
From
Mirzoyan (2015):
The coordinates reported are the same as those in
NED
- R.A. (J2000): 14h 43m 56.9s
- Dec. (J2000): +25d 01m 44s
- No positional uncertainty is quoted
Spectral Information
From
Ahnen et al. (2015):
- The spectrum was measured between 40 and 250 GeV
- Period B (MJD 57130.0-57135.5) is best fit by a log parabola with
an index of 4.69 +/- 0.16(stat) and b of 3.2 +/- 1.0
- Period C (MJD 57135.5-57139.5) is best fit by a power law with
spectral index of 3.7 +/- 0.4(stat) +/- 0.2(syst)
From
Abeysekara et al. (2015)
- The spectrum was measured between 80 and 200 GeV
- The data from MJD 57133-57140 were fit with a power law with
spectral index of 5.3 +/- 0.5(stat) +/- 0.2(syst)
Variability:
From
Ahnen et al. (2015):
- "in the VHE band, the no-variability hypothesis can be discarded"
From
Abeysekara et al. (2015)
- no variability is detected during the time period of the detection
(MJD 57133-57140) but when the source was re-observed during MJD
57155-57166, no gamma-ray emission was detected
Distance:
From
Ahnen et al. (2015):
- a redshift of z=0.9397 +/- 0.0003(stat) is reported and is
attributed to the
SDSS
-
Shaw et al. (2012) is also referenced
From
Abeysekara et al. (2015)
- a redshift of z=0.939 is quoted from
Shaw et al. (2012)
Seen by: MAGIC, VERITAS
-
Probing the absorption of gamma-rays by IR radiation from the dusty torus in FSRQs with the Cherenkov Telescope Array
Galanti, Giorgio et al., arXiv e-prints parXiv:2002.05052 (2020) [LINK]
-
Hard X-ray properties of NuSTAR blazars
Bhatta, G. et al., ArXiv e-prints p (2017) [LINK]
-
Discovery of Very High Energy Gamma-Ray Emission from the distant FSRQ PKS 1441+25 with the MAGIC telescopes
Mirzoyan, R., The Astronomer's Telegram 7416 p1 (2015) [LINK]
-
Very-high-energy gamma-ray emission from PKS 1441+25 detected with VERITAS
Mukherjee, R., The Astronomer's Telegram 7433 p1 (2015) [LINK]
-
Highlights from the VERITAS AGN Observation Program
Benbow, W. and for the VERITAS Collaboration, ArXiv e-prints p (2015) [LINK]
-
Gamma rays from the quasar PKS 1441+25: story of an escape
Abeysekara, A.U. et al., ArXiv e-prints p (2015) [LINK]
-
Very-high-energy gamma-rays from the Universe's middle age: detection of the z=0.940 blazar PKS 1441+25 with MAGIC
MAGIC Collaboration et al., ArXiv e-prints p (2015) [LINK]
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