[vsnet-grb 481197] New notice type SK_SN available from GCN
Bacodine
vxw at capella2.gsfc.nasa.gov
Wed Apr 14 03:39:39 JST 2021
TO: All GCN Notice recipients
RE: SuperKamiokande Supernova Notice type is available
DT: 13 Apr 2021
INTRODUCTION:
The GCN system has been modified to incorporate the distribution
of the Super-Kamiokande SuperNova (SK_SN) neutrino source detections.
These neutrinos outbursts are due to supernovea in our galaxy.
OCCURANCE RATE:
The SK_SN "real" notices are rare and occur about 0.03 times per year.
(The "test" notices occur on the 1st day of each month.)
LOCATION ERROR:
The typical location uncertainties are 1-4 deg (radius, stat, 68-95% containment).
TIME DELAY:
The post-event processing (both pipeline and human involved) lasts less than 60 minutes,
the notice information is sent to GCN for formating, filtering and distribution within 10 sec.
NOTICE TYPES:
The SK_SN has both the "real" and the "test" content within the SK_SN Type.
Because of the low occurance rate of the "real" form, the two forms were combined
into a single sign-up so that the "test" notices can be used as a periodic testing
of the "real" stream. (They both have the same Notice Type_Number of 175.)
(If desired, the client can request that "test" stream be disabled.)
For the full email format, the distinction between the two sub-streams is shown in
the 3rd field in the 3rd line in the full-format email (see example below).
The field is filled with a "REAL" or a "TEST". The other distribution formats
have similar distinctions.
TITLE: GCN/SK_SN NOTICE
NOTICE_DATE: Wed 20 Nov 13 09:12:06 UT
NOTICE_TYPE: SK_SN REAL <=== The indicator of "real" vs "test"
TRIGGER_NUMBER: SK_SN 1 <=== The Real notices start with 1
SRC_RA: 318.3000d {+21h 13m 12s} (J2000),
318.5203d {+21h 14m 05s} (current),
317.7725d {+21h 11m 05s} (1950)
SRC_DEC: +31.3700d {+31d 22' 12"} (J2000),
+31.4569d {+31d 27' 25"} (current),
+31.1630d {+31d 09' 47"} (1950)
SRC_ERROR68: 0.64 [deg radius, stat-only, 68% containment]
SRC_ERROR90: 0.91 [deg radius, stat-only, 90% containment]
SRC_ERROR95: 1.04 [deg radius, stat-only, 95% containment]
DISCOVERY_DATE: 19166 TJD; 318 DOY; 20/11/13 (yy/mm/dd)
DISCOVERY_TIME: 30601 SOD {08:30:01.22} UT
N_EVENTS: 54029 (Number of detected neutrino events)
ENERGY_LIMIT: 7.00 [MeV] (Minimum energy of the neutrinos)
DURATION: 10.0 [sec] (Collection duration of the neutrinos)
DISTANCE: 2.35 - 3.22 [kpc] (low - high as SN1987A like SNe)
COMMENTS: The position error is statistical only, there is no systematic added.
COMMENTS: All numbers are preliminary.
COMMENTS:
COMMENTS: NOTE: This is a REAL EVENT! It is NOT a TEST event.
TITLE: GCN/SK_SN NOTICE
NOTICE_DATE: Wed 20 Nov 13 09:12:06 UT
NOTICE_TYPE: SK_SN TEST <=== The indicator of "test" vs "real"
TRIGGER_NUMBER: SK_SN 10001 <=== The Test notices start with 10000
SRC_RA: 318.3000d {+21h 13m 12s} (J2000),
318.5203d {+21h 14m 05s} (current),
317.7725d {+21h 11m 05s} (1950)
SRC_DEC: +31.3700d {+31d 22' 12"} (J2000),
+31.4569d {+31d 27' 25"} (current),
+31.1630d {+31d 09' 47"} (1950)
SRC_ERROR68: 0.64 [deg radius, stat-only, 68% containment]
SRC_ERROR90: 0.91 [deg radius, stat-only, 90% containment]
SRC_ERROR95: 1.04 [deg radius, stat-only, 95% containment]
DISCOVERY_DATE: 19166 TJD; 318 DOY; 20/11/13 (yy/mm/dd)
DISCOVERY_TIME: 30601 SOD {08:30:01.22} UT
N_EVENTS: 54029 (Number of detected neutrino events)
ENERGY_LIMIT: 7.00 [MeV] (Minimum energy of the neutrinos)
DURATION: 10.0 [sec] (Collection duration of the neutrinos)
DISTANCE: 2.35 - 3.22 [kpc] (low - high as SN1987A like SNe)
COMMENTS: The position error is statistical only, there is no systematic added.
COMMENTS: All numbers are preliminary.
COMMENTS:
COMMENTS: NOTE: This is a TEST EVENT! It is NOT a REAL event.
FILTERING:
Unlike many of the other notice types, there is no filtering applied
the SK_SN Notice type other than Type-filtering and SK_SN_no_test.
Given the low rate of these events, it did not seem useful to apply
any further filtering.
DISTRIBUTION FORMATS:
All the usual distribution methods and formats are available
(binary socket, voevent xml socket, full-format email, several
short-forms for cells/pagers, and VOEvent text).
ARCHIVE STORAGE OF THE NOTICES:
The GCN/SK_SN Notices are archived within the GCN website
in the Table of SK_SN transients:
http://gcn.gsfc.nasa.gov/gcn/sk_sn_events.html
Both the "real" and "test" sub-types have accumulation tables.
The inclusion of the "tests" allow for checking that
the system is active for this type (at least at the monthly level).
MISC:
The socket packets contents for this type can be found at:
http://gcn.gsfc.nasa.gov/gcn/sock_pkt_def_doc.html
ACTION ITEM:
If, after reviewing the information below, you want to receive the
"real" or both of these SK_SN position notices, please send me a request
to have them enabled. You can do this by forwarding this email to
scott at milkyway.gsfc.nasa.gov.
Sincerely,
Scott
Scott Barthelmy NASA-GSFC, Code 661, Greenbelt, MD 20771
PHONE: 301-286-3106 (office) (Don't call due to pandemic tele-working)
CELL: 301-346-3733 (mobile) (call)
EMAIL: scott at milkyway.gsfc.nasa.gov
WEB: http://gcn.gsfc.nasa.gov/gcn
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