NASA Technical Reports Server (NTRS) 20110008162: NASA EM Followup of LIGO-Virgo Candidate Events

0.2 MB·English

by  NASA Technical Reports Server (NTRS)

NASA EM Followup of LIDO-Virgo Candidate Events
L. Blackburn for the LIGO Scientific Collaboration and Virgo Collaboration
NASA Goddard Space Flight Center
Abstract EM detectors:
We present a strategy for a follow-up of LIGO- Mission Instrument Energy FOV A8 Ttfansit
Virgo candidate events using offline survey RXTE ASM 1-10 keV 3°70 <1' 1.5 hr
data from several NASA high-energy photon SWIFT BAT 20-150 keV 15% <1' n/a
instruments aboard RXTE, Swift, and Fermi. FERMI GBM 20 keV-40 MeV 65% >5° 3 hr
Time and sky-location information provided by FERMI LAT 20 MeV-300 GeV 20% 1-5° 3 hr
'
the GW trigger allows for a targeted search FOV: fraction of sky observed, 48: source localization resolution, T,,,,,,: time requ=red for full-sky coverage
for prompt and afterglow EM signals. In doing
LIGO-Virgo GW network:
so, we expect to be sensitive to signals which
Instruments Frequency Optimal NS/NS—NS/BH Range
are too weak to be publicly reported as
H1 L1 V1 50-6000 Hz —30-70 Mpc 1
astrophysical EM events.
Searches
Prompt search Afterglow search
Search for p, mto , gna n GBM der ors [-I 0 60s uc of Sea, SMa x n 90 s d+.e Iz o _ ,sin
GNJ e ;tT ales not e y angez a w chin h, GIN sky m11 G ,' day ra" ng G4 - v.
b GB' Mnu d are GndR n_8 '^ eUnc Ge PW o b,b w >p;e.er1 GI v3 e _ r. rn, x0^b0 n0 n1g ,^`'^^-^ t_IGO Vbiuf rgste a ncdo ;nFseprrieafn r. i'^ r;.;dTeX ayr c o , , oo- r nr 1 ve, «SMp he r ,o f ce G1W ,r t xr^y '.. g
evencs ( f •wk) - _
g
S ,h p p nn n3A7 gl (,n ^ "s
g,g b v­ —, gg 7 t 1 60s1 Jr 1 GW
abour_me of GW event O ,y s ,ch fBAT r - t j, is fo owng rlelGV,
I cons sr, —h GW <e Inca'z, ,c fogf eiCOo a by -A a- z^ ,r,
r,C Jvhrr probon hey per Gov ever,,. v Dot cc, icenc- p.-otao / p G....._ ..
FERMI Gamma-ray Burst Monitor (GBM) RXTE All Sky Monitor (ASM)
GBM offline data includes count rates (0.256 s bins, 8 energy channels) of the The ASM aboard RXTE provides a 90 s 1-10 keV (3 sub-bands) snapshot of an area
12 Nal (8 keV-1 MeV) and 2 EGO (200 keV-40 MeV) detectors. in the sky as often as every 90 minutes. Localization of —0.1° is achieved by use of
three cameras each equipped with a shadow mask.
GRB10090510: a strong, short The analysis method offitting the amplitudes of a smelt number of pe t
idonenctreeec aotsobersss-e trThvehe el.d mo nien--br eothsaoerdl uG ttiroiBgngM oefr ,osoaf umthracete ssa imnli egt hhteet o eFhuOnrivVqeu steo f totohr ess camavnae setkhs eeod mf diinattetea rs ekissyt g-(eerxingteehrnta)t_l lo yHf euthrseee dwG etWo r rp t.r <,og deu,c er- - - -
thmerr sbdnatneeiyd f odlloewteincgt othre c eovuenntt.s tThhe efe Gw Wda yssk fyom*loawp iinsg d thver deevednint ttoc s0e1a ric-ht "f otro Xo -riasy w and ghlowe re 90 c- dwt
mful,d., are fit to the data ab .Nair a c,00g or a
The Nal detectors are semi-directional (—cos e response) and can be used for e locations. The ed, s t,,ny o1 the 90 s dwells s lb.. ut 20 iCr, n
source localization and consistency checks. The GW location can be used as a fxx1'. 0 J..abor ofa andn ce^sr pbee cirerpd: ogvread ;`hcriys a mve tg-l i >o .- 1a a c -. - -
basis for a coherent sum of the 12 data streams, increasing the overall response mlec v,=on m rr -k, r:;rve tr a ant soe ica
of the network compared to a single-detector approach. t sky aear<. fa `.,A t rns<eris - ....es -FT
e,. c .-_a tear -. the .::ske6 ,t...
Sg'a u -ae ur r, x e, s,_^r ",i . at, aft asos_ ., art t
3csac of kwwn A- ay so,.,.,e- ec„i CJ s as is ,.,ec'.d -
t. uIn - °_eve X ,,_ curter f., , r.. & GIAI xyrnap
SWIFT Burst Alert Telescope (BAT) FERMI Large Area Telescope (LAT)
4 5
-
• BAT lightcurve data contains total ^kz, • LAT complete individual photon data
flux counts at 64 ms resolution in available for offline analysis.
various energy bands.
Each photon characterized by time, sky
• For un-triggered (low threshold) locaaor,- anal eref gy Single f.haton resolve6
events, imaging is only available at IC° (16 MeV) to 0 1° (IC GtV) Clu,,LOr of
offline for 5 minute fmescaies. protons ;rnpro cs roc ccocutuorlcscr ,_^.
1 :
Usabllty cepends on level of non- ,. ^.e.r- • k l,cif ood stare _ . vi nby LAT _ear; to
G. us-n, t ansier=u .- ._. de rt,fy 6c-smr f--_^r._.
LSC, -y, r'_ I'_-tboratror Py Cebl 115 for the Ref” o: C tract Biro VCo.tex; chs Otservct 1., D"ecr—. c bcs _.oaf tl' I G-,'av f2c, v) ±73;Q3 101 201'
2 C..v; - 4a n et - . The Form - '" ay 9 ^rsi tatonifor, A.pJ?02 ?2009) 191 ' IG`O Ga 100017
A- Lea,he et al-. bust Results from 11, Ah-Ski, Manrtor en the Rossi X-ray 7rmirg cxptarer, Apr 459 (1930) L33
4. S. nahrelmy or The Burst Are,-, 7Xes f,a lrBA.) on the ShciFT Min- Ass-7. mace Su'enc c Rev e,c .2G (20v5l. I,;;ue ., 4- ;43
5 ra !i1LAT CA-1.1,,i—:W 6. Atwood or a Do, Le ge Are.. rfn, Ferm' Gar.. r s . ay Spats 7 i—c,pi, . ssr A^J 697 (2009) 1371