Difference between revisions of "EGAL02"
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'''It seems the gamma-ray spectrum of Ton 599 is sometimes hard (<2.0) (especially since April) and variable. So even when integral photon flux above 100 MeV is below the original limit (0.5x10-6 cm-2 s-1), there is a possibility to detect this source. When the spectrum is hard enough (e.g. April 23, 2023), it is detectable for a short observation. Thus, we want to request to schedule short exposure observations (1-1.5 hours) for monitoring purposes, rather than longer exposure for less nights, when this source can be scheduled (=no collision with other higher priority tasks/sources).''' | '''It seems the gamma-ray spectrum of Ton 599 is sometimes hard (<2.0) (especially since April) and variable. So even when integral photon flux above 100 MeV is below the original limit (0.5x10-6 cm-2 s-1), there is a possibility to detect this source. When the spectrum is hard enough (e.g. April 23, 2023), it is detectable for a short observation. Thus, we want to request to schedule short exposure observations (1-1.5 hours) for monitoring purposes, rather than longer exposure for less nights, when this source can be scheduled (=no collision with other higher priority tasks/sources).''' | ||
| + | |||
| + | === Past observation === | ||
| + | ===== Ton 599 ===== | ||
| + | * 2023-01-18 (no detection) | ||
| + | ** run | ||
| + | {| align='center' | ||
| + | | [[File:Ton599_2023018_srcdep_g07_i50.png|thumb|centre|400px|intensity>50, gammaness>0.7]] | ||
| + | | [[File:Ton599_20230118_srcdep_g08_i150.png|thumb|centre|400px|intensity>150, gammaness>0.8]] | ||
| + | | [[File:Ton599_fermi_20230118.png|thumb|centre|400px|Fermi (2023-01-18 12:00 to 2023-01-19 12:00)]] | ||
| + | |} | ||
=== Performed observation === | === Performed observation === | ||
Revision as of 16:59, 13 May 2023
Contents
Proposal
Proposal: EGAL02:Observations of distant bright FSRQs in active states
PI: Seiya Nozaki (nozaki@mpp.mpg.de)
Source: 3C454.3
RA (J2000) 343.49061685 deg
DEC (J2000) 16.14821153 deg
Source: Ton599
RA (J2000) 179.88264131 deg
DEC (J2000) 29.24550745 deg
Observational settings/limits
- original criteria to observe Ton 599
we request 50 hours of observations unless the average integral photon flux (>100 MeV) goes down below 0.5×10−6 cm−2 s−1
It seems the gamma-ray spectrum of Ton 599 is sometimes hard (<2.0) (especially since April) and variable. So even when integral photon flux above 100 MeV is below the original limit (0.5x10-6 cm-2 s-1), there is a possibility to detect this source. When the spectrum is hard enough (e.g. April 23, 2023), it is detectable for a short observation. Thus, we want to request to schedule short exposure observations (1-1.5 hours) for monitoring purposes, rather than longer exposure for less nights, when this source can be scheduled (=no collision with other higher priority tasks/sources).
Past observation
Ton 599
- 2023-01-18 (no detection)
- run
File:Ton599 2023018 srcdep g07 i50.png intensity>50, gammaness>0.7 |
Performed observation
Ton 599
- 2023-04-19 (no detection)
- run 12768, 12769, 12770, 12771, 12772, 12774
- 2023-04-23 (3-5 sigma?)
- run 12832, 12833, 12834, 12835
- 2023-05-05 (FYI, no LST observation)
- 2023-05-11 (no detection)
- run 12941, 12942, 12943, 12944, 12945
Analysis
- Summary (Ton599) https://docs.google.com/presentation/d/1gaDXn9cRdHN7RWg4m9iZqNLSwOAlH4m0W2f5V8CqSI8/edit?usp=sharing
