[vsnet-grb 230072] Fermi-GBM Lightcurves added to GCN
Bacodine
vxw at capella2.gsfc.nasa.gov
Wed Apr 23 23:13:03 JST 2014
TO: All GCN Notice recipients
RE: Fermi-GBM Lightcurves added
DT: 23 Apr 2014
INTRODUCTION:
The GCN system has been modified to incorporate the distribution
lightcurves for Fermi-GBM triggers. Link information has been added
to the full-format form of the email notices, the 160-byte
binary socket packets, and to the various forms of VOEvents.
(Note that this announcement is for the GBM Lightcurve data product
and not for the just-announced GBM Localization data product.
The localization product is still being worked within GCN
and will be available in a few days.)
WHICH NOTICES and AVAILABILITY DELAY:
These lightcurve URLs are included in the notice types
listed in the table below:
TYPE PKT_NUM DELAY [min]
================== ======= ===========
GBM_ALERT 110 10-15 min
GBM_FLT_POS 111 10-15 min
GBM_GND_POS 112 9-14 min
GBM_FIN_POS 115 0 min
where the "DELAY" is the time between the issuing of that particular notice type
in the sequence of notice types for each trigger and the availability
of the lightcurve product, ie by the time that the FINAL_POSITION notice type is issued,
the file for the lightcurve should already be on the website. These delays assume
the only latency is the downlink of the data that make up the lightcurve. There may be
additional latency in posting the data, and the delays listed below should
be considered a lower limit.
THE LIGHTCURVE URL:
The url included in the email is of the form:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/20YY/bnYYMMDDFFF/quicklook/glg_lc_medres34_bnYYMMDDFFF.gif
and here is a real example (the YY, YYMMDDFFF parts have been replaced with real values):
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn140404030/quicklook/glg_lc_medres34_bn140404030.gif
Once this string is built, then you can use the 'wget' command (or similar) to retrieve the lightcurve file:
wget http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn140404030/quicklook/glg_lc_medres34_bn140404030.gif
OTHER LIGHTCURVES ARE ALSO AVAILABLE:
Besides the "middle resolution, energy bands 3 & 4" (medres34) lightcurve,
there are also 14 other forms of the lightcurve (in various time binnings and various energy bands)
that are automatically produced by the GBM Team and posted on the website for retrieval:
glg_lc_all_bn140404030.gif
glg_lc_chan12_bn140404030.pdf
glg_lc_chan34_bn140404030.pdf
glg_lc_chan567_bn140404030.pdf
glg_lc_chantot_bn140404030.pdf
glg_lc_hires12_bn140404030.gif
glg_lc_hires34_bn140404030.gif
glg_lc_hires567_bn140404030.gif
glg_lc_lores12_bn140404030.gif
glg_lc_lores34_bn140404030.gif
glg_lc_lores567_bn140404030.gif
glg_lc_medres12_bn140404030.gif
glg_lc_medres34_bn140404030.gif
glg_lc_medres567_bn140404030.gif
glg_lc_tot_bn140404030.pdf
There is also a readme file explaining the contents of each of these data products:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn140404030/quicklook/README
ACTION ITEM:
There is no action needed on your part. If you are already receiving
any of these 4 Fermi-GBM notice types, then the lightcurve link information
is already included in what you are receiving. (Of course, you can always
change your configuration to enable or disable any of these Fermi-GBM
notice types. And you make any other changes to your configuration.)
MORE INFORMATION:
Can be found at: http://gcn.gsfc.nasa.gov/gcn/fermi.html
NOTICE EXAMPLE:
Here are examples of a full-format email Fermi-GBM_FLT_POS:
///////////////////////// Fermi-GBM e-mail format //////////////////////////////
TITLE: GCN/FERMI NOTICE
NOTICE_DATE: Fri 04 Apr 14 00:43:50 UT
NOTICE_TYPE: Fermi-GBM Flight Position
RECORD_NUM: 44
TRIGGER_NUM: 418265009
GRB_RA: 62.283d {+04h 09m 08s} (J2000),
62.893d {+04h 11m 34s} (current),
60.177d {+04h 00m 42s} (1950)
GRB_DEC: +80.617d {+80d 37' 00"} (J2000),
+80.653d {+80d 39' 12"} (current),
+80.483d {+80d 28' 58"} (1950)
GRB_ERROR: 27.95 [deg radius, statistical plus systematic]
GRB_INTEN: 49 [cnts/sec]
DATA_SIGNIF: 4.90 [sigma]
INTEG_TIME: 4.096 [sec]
GRB_DATE: 16751 TJD; 94 DOY; 14/04/04
GRB_TIME: 2606.09 SOD {00:43:26.09} UT
GRB_PHI: 220.00 [deg]
GRB_THETA: 15.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO: 1.33
LOC_ALGORITHM: 3 (version number of)
MOST_LIKELY: 95% GRB
2nd_MOST_LIKELY: 1% Generic SGR
DETECTORS: 0,0,0, 0,0,0, 1,1,0, 0,0,0, 0,0,
LC_URL: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2014/bn140404030/quicklook/glg_lc_medres34_bn140404030.gif
SUN_POSTN: 13.05d {+00h 52m 12s} +5.59d {+05d 35' 27"}
SUN_DIST: 78.44 [deg] Sun_angle= -3.3 [hr] (East of Sun)
MOON_POSTN: 65.69d {+04h 22m 46s} +18.20d {+18d 12' 00"}
MOON_DIST: 62.47 [deg]
MOON_ILLUM: 20 [%]
GAL_COORDS: 130.55, 20.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 81.78, 57.97 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: Fermi-GBM Flight-calculated Coordinates.
COMMENTS: This trigger occurred at longitude,latitude = 241.88,20.03 [deg]
COMMENTS: This Notice was ground-generated -- not flight-generated.
COMMENTS: The URL_LC file will not be created until ~15 min after the trigger.
////////////////////////////////////////////////////////////////////////////
The socket packets contents can be found at:
http://gcn.gsfc.nasa.gov/gcn/sock_pkt_def_doc.html
The YYMMDD is stored in slot 31, and the fraction-of-day FFF is stored in slot 32.
REMINDER OF RECENT ADDITIONS TO GCN:
In case you have missed them, here is a brief list of the most recent additions
to the GCN system. You might consider signing up for these Notice types as well.
The full announcements/descriptions for each of these can be found at: http://gcn.gsfc.nasa.gov/gcn/whats_new.html
FERMI_LAT_OFFLINE (Feb 2014) // LAT detections found in off-line ground processing
SUZAKU_LIGHTCRVE (Nov 2013) // Lightcurves from Suzaku-WAM
IPN_RAW resumes (Aug 2012) // IPN Team resumes producing the IPN_RAW notices
SWIFT_BAT_SUB_SUB_THRESHOLD (May 2012) // Swift-BAT Triggers with very low significance; use for temporal coincidences
VOEvent Direct Server (Mar 2012) // Added 3 VOEvent servers to allow for direct distribution of VOEvents
FERMI_LAT_MON/_TRANS (Aug 2011) // Flare-ups from known sources monitored by Fermi-LAT & non-GRB transients
FERMI_LAT_GND (Aug 2011) // Automated ground processing to get GRB positions
MOA (Aug 2011) // Locations of up-coming gravitational lensing events
DOW_TOD (Jun 2011) // Preprogrammed notices at specific days-of-week & time-of-day
FERMI_GBM FIN_POS (Jun 2011) // Human-in-the-loop ground-based analysis
MAXI_UNKNOWN/_KNOWN (Apr 2011) // Unknown transients & Flare-ups from Known sources
INTEGRAL_WEAK (Feb 2011) // Subthreshold detections by INTEGRAL
SWIFT_BAT_MONITOR (Feb 2010) // Flare-ups from known sources monitored by Swift-BAT
Sincerely,
Scott
Scott Barthelmy NASA-GSFC, Code 661, Greenbelt, MD 20771
PHONE: 301-286-3106 (office) CELL: 301-346-3733
EMAIL: scott at lheamail.gsfc.nasa.gov
PAGER: 3013463733 at cingularme.com
WEB: http://gcn.gsfc.nasa.gov/gcn
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