Difference between revisions of "EGAL02"

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=== Observational settings/limits ===
 
=== Observational settings/limits ===
  
−
- original criteria to observe Ton 599
+
- 3C454.3
  
−
  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
+
  The observations should be organized through the ToO form when the integral photon flux (>100 MeV) reaches 1×10−5 cm−2 s−1.
 +
In this state, LST-1 is expected to detect low-energy gamma-ray signals with ∼30 hours of observations.
 +
If we detect a significant flare and the integral photon flux is still above the mentioned threshold after the flare, we also request another 30 hours of observations after the flare
  
−
'''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).'''
+
- Ton 599
  
−
=== Past observation ===
+
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
−
===== Ton 599 =====
 
−
* 2023-01-13 (ToO)
 
−
** run 11635, 11636, 11637, 11638
 
−
** Zd=40-50, moon (~10 x dark NSB)
 
−
{| align='center'
 
−
| [[File:Ton599_20230113_srcdep_g07_i50.png|thumb|centre|400px|intensity>50, gammaness>0.7]]
 
−
| [[File:Ton599_20230113_srcdep_g08_i150.png|thumb|centre|400px|intensity>150, gammaness>0.8]]
 
−
| [[File:Ton599_fermi_20230113.png|thumb|centre|400px|Fermi (2023-01-13 12:00 to 2023-01-14 12:00)]]
 
−
|}
 
  
 +
'''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 (1-2 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). If we detect some signs of active state (e.g. high energy photons), we will contact schedulers.'''
  
−
* 2023-01-15 (ToO)
+
== Analysis ==
−
** run 11678
 
−
** Zd~10, moon (3 x dark NSB)
 
−
{| align='center'
 
−
| [[File:Ton599_20230115_srcdep_g07_i50.png|thumb|centre|400px|intensity>50, gammaness>0.7]]
 
−
| [[File:Ton599_20230115_srcdep_g08_i150.png|thumb|centre|400px|intensity>150, gammaness>0.8]]
 
−
| [[File:Ton599_fermi_20230115.png|thumb|centre|400px|Fermi (2023-01-15 12:00 to 2023-01-16 12:00)]]
 
−
|}
 
−
 
 
−
* 2023-01-17 (ToO)
 
−
** run 11704, 11705, 11706, 11707
 
−
** Zd=40-50, dark
 
−
{| align='center'
 
−
| [[File:Ton599_20230117_srcdep_g07_i50.png|thumb|centre|400px|intensity>50, gammaness>0.7]]
 
−
| [[File:Ton599_20230117_srcdep_g08_i150.png|thumb|centre|400px|intensity>150, gammaness>0.8]]
 
−
| [[File:Ton599_fermi_20230117.png|thumb|centre|400px|Fermi (2023-01-17 12:00 to 2023-01-18 12:00)]]
 
−
|}
 
−
 
 
−
* 2023-01-18 (ToO)
 
−
** run 11718, 11720, 11721
 
−
** Zd=10-20
 
−
{| align='center'
 
−
| [[File:Ton599_20230118_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)]]
 
−
|}
 
−
{| align='center'
 
−
| [[File:Ton599_20230118_srcdep_sed.png|thumb|centre|400px|SED (LST)]]
 
−
| [[File:Ton599_20230118_srcdep_sed_with_fermi.png|thumb|centre|400px|SED (LST + Fermi)]]
 
−
 
 
−
|}
 
−
 
 
−
=== Performed observation ===
 
−
===== Ton 599 =====
 
−
* 2023-04-19 (no detection)
 
−
** run 12768, 12769, 12770, 12771, 12772, 12774
 
−
** Zd=0-30, dark
 
−
{| align='center'
 
−
| [[File:Ton599_20230419_srcdep_g07_i50.png|thumb|centre|400px|intensity>50, gammaness>0.7]]
 
−
| [[File:Ton599_20230419_srcdep_g08_i150.png|thumb|centre|400px|intensity>150, gammaness>0.8]]
 
−
| [[File:Ton599_fermi_20230419.png|thumb|centre|400px|Fermi (2023-04-19 12:00 to 2023-04-20 12:00)]]
 
−
|}
 
−
 
 
−
* 2023-04-23 (3-5 sigma?)
 
−
** run 12832, 12833, 12834, 12835
 
−
** Zd=0-10, (almost) dark, DAQ PROBLEM (100% busy spikes)
 
−
{| align='center'
 
−
| [[File:Ton599_20230423_srcdep_g07_i50.png|thumb|centre|400px|intensity>50, gammaness>0.7]]
 
−
| [[File:Ton599_20230423_srcdep_g08_i150.png|thumb|centre|400px|intensity>150, gammaness>0.8]]
 
−
| [[File:Ton599_fermi_20230423.png|thumb|centre|400px|Fermi (2023-04-23 12:00 to 2023-04-24 12:00)]]
 
−
|}
 
−
 
 
−
{| align='center'
 
−
| [[File:Ton599_20230423_srcdep_sed.png|thumb|centre|400px|SED (LST)]]
 
−
| [[File:Ton599_20230423_srcdep_sed_with_fermi.png|thumb|centre|400px|SED (LST + Fermi)]]
 
−
 
 
−
|}
 
−
 
 
−
 
 
−
 
 
−
 
 
−
 
 
−
* 2023-05-05 (FYI, no LST observation)
 
−
{| align='center'
 
−
| [[File:Ton599_fermi_20230505.png|thumb|centre|400px|Fermi (2023-05-11 12:00 to 2023-05-12 12:00)]]
 
−
|}
 
−
 
 
−
* 2023-05-11 (no detection)
 
−
** run 12941, 12942, 12943, 12944, 12945
 
−
{| align='center'
 
−
| [[File:Ton599_20230511_srcdep_g07_i50.png|thumb|centre|400px|intensity>50, gammaness>0.7]]
 
−
| [[File:Ton599_20230511_srcdep_g08_i150.png|thumb|centre|400px|intensity>150, gammaness>0.8]]
 
−
| [[File:Ton599_fermi_20230511.png|thumb|centre|400px|Fermi (2023-05-11 12:00 to 2023-05-12 12:00)]]
 
−
|}
 
−
 
 
−
=== Analysis ===
 
 
- Summary (Ton599)
 
- Summary (Ton599)
 
https://docs.google.com/presentation/d/1gaDXn9cRdHN7RWg4m9iZqNLSwOAlH4m0W2f5V8CqSI8/edit?usp=sharing
 
https://docs.google.com/presentation/d/1gaDXn9cRdHN7RWg4m9iZqNLSwOAlH4m0W2f5V8CqSI8/edit?usp=sharing
 +
 +
- wiki page
 +
-- https://www.lst1.iac.es/wiki/index.php/TON599
 +
-- https://www.lst1.iac.es/wiki/index.php/3C454.3

Latest revision as of 11:23, 17 January 2024

Proposal[edit]

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[edit]

- 3C454.3 

The observations should be organized through the ToO form when the integral photon flux (>100 MeV) reaches 1×10−5 cm−2 s−1. 
In this state, LST-1 is expected to detect low-energy gamma-ray signals with ∼30 hours of observations. 
If we detect a significant flare and the integral photon flux is still above the mentioned threshold after the flare, we also request another 30 hours of observations after the flare

- 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 (1-2 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). If we detect some signs of active state (e.g. high energy photons), we will contact schedulers.

Analysis[edit]

- Summary (Ton599) https://docs.google.com/presentation/d/1gaDXn9cRdHN7RWg4m9iZqNLSwOAlH4m0W2f5V8CqSI8/edit?usp=sharing

- wiki page -- https://www.lst1.iac.es/wiki/index.php/TON599 -- https://www.lst1.iac.es/wiki/index.php/3C454.3

Retrieved from "https://www.lst1.iac.es/wiki/index.php?title=EGAL02&oldid=8409"