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Observation Date (UT) Observation Lat

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:
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
- 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)

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

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)

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