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GCN Circular 36480

Subject
LIGO/Virgo/KAGRA S240422ed: Las Cumbres Observatory Follow-up Observations of the Localization Region
Date
2024-05-14T20:27:35Z (2 months ago)
From
Craig Pellegrino at University of Virginia <cmp5cr@virginia.edu>
Via
API
Craig Pellegrino (University of Virginia), Iair Arcavi (Tel Aviv University), D. Andrew Howell (Las Cumbres Observatory), Curtis McCully (Las Cumbres Observatory), Moira Andrews (Las Cumbres Observatory), Joseph Farah (Las Cumbres Observatory), Megan Newsome (Las Cumbres Observatory), Estefania Padilla Gonzalez (Las Cumbres Observatory), Giacomo Terreran (Las Cumbres Observatory) report:

We report targeted follow-up observations of the localization region of S240422ed obtained with Las Cumbres Observatory via the Global Kilonova Project (GKP). The GKP observed 158 distinct galaxies at multiple bands and epochs within the 90% localization region. Fields were chosen following the procedure of Arcavi et al. (2017), which selects galaxies by crossmatching the LVK collaboration healpix maps with galaxy catalogs and scores them by their distances and stellar masses. 305 pointings of these fields, which cover approximately 17.5 deg. sq. (more than 8% of the total localization posterior), were reported to the Treasure Map (Wyatt et al. 2020; https://zenodo.org/records/11094890). Follow-up pointings will be reported in a future message. Analysis of the obtained data is ongoing and will also be reported in a future message.

# Targets
| name                      | ra                 | dec                 | epoch  | new_discovery |
| ------------------------- | ------------------ | ------------------- | ------ | ------------- |
| WISEA J082137.61-213407.8 | 125.40691666667    | -21.569055555560002 | 2000.0 | False         |
| WISEA J082210.27-255317.7 | 125.54333333333    | -25.88802777778     | 2000.0 | False         |
| WISEA J075804.45-271753.4 | 119.51854166667    | -27.298416666669997 | 2000.0 | False         |
| WISEA J081645.45-203612.1 | 124.18945833333    | -20.60333333333     | 2000.0 | False         |
| WISEA J082316.55-220506.5 | 125.81904166667    | -22.08513888889     | 2000.0 | False         |
| WISEA J075825.88-262346.6 | 119.608125         | -26.396388888889998 | 2000.0 | False         |
| WISEA J080229.34-264555.8 | 120.62216666667    | -26.7655            | 2000.0 | False         |
| WISEA J075840.13-220511.5 | 119.66716666667    | -22.0865            | 2000.0 | False         |
| WISEA J080713.53-315729.6 | 121.80641666667    | -31.958138888889998 | 2000.0 | False         |
| WISEA J081105.57-305230.7 | 122.77325          | -30.87522222222     | 2000.0 | False         |
| WISEA J080557.29-264951.2 | 121.48858333333    | -26.83086111111     | 2000.0 | False         |
| WISEA J080032.44-305504.0 | 120.13529166667    | -30.91777777778     | 2000.0 | False         |
| WISEA J080228.69-291233.8 | 120.61954166667    | -29.20947222222     | 2000.0 | False         |
| WISEA J075810.99-274632.0 | 119.545875         | -27.77561111111     | 2000.0 | False         |
| WISEA J081800.74-161403.2 | 124.50320833333    | -16.23416666667     | 2000.0 | False         |
| WISEA J081214.53-191837.2 | 123.06058333333    | -19.31038888889     | 2000.0 | False         |
| WISEA J081800.56-161359.0 | 124.5025           | -16.23336111111     | 2000.0 | False         |
| WISEA J080954.78-181428.6 | 122.47820833333    | -18.24130555556     | 2000.0 | False         |
| WISEA J080230.64-224546.2 | 120.627625         | -22.76294444444     | 2000.0 | False         |
| WISEA J080825.69-310300.3 | 122.10704166667    | -31.05019444444     | 2000.0 | False         |
| WISEA J081116.42-305423.5 | 122.818375         | -30.90655555556     | 2000.0 | False         |
| WISEA J081256.23-205356.5 | 123.23433333333    | -20.899027777780002 | 2000.0 | False         |
| WISEA J081930.95-192726.0 | 124.879125         | -19.45744444444     | 2000.0 | False         |
| WISEA J080902.53-242701.5 | 122.26058333333    | -24.45055555556     | 2000.0 | False         |
| WISEA J075349.40-245755.1 | 118.455375         | -24.965305555560004 | 2000.0 | False         |
| WISEA J080835.80-201333.0 | 122.14916666667    | -20.22575           | 2000.0 | False         |
| WISEA J081226.90-184118.1 | 123.11216666666999 | -18.6885            | 2000.0 | False         |
| WISEA J080923.30-310813.9 | 122.347125         | -31.13725           | 2000.0 | False         |
| WISEA J080915.90-242709.3 | 122.31616666667    | -24.45297222222     | 2000.0 | False         |
| WISEA J075643.03-243439.3 | 119.17933333333    | -24.57752777778     | 2000.0 | False         |
| 2MFGC 06303               | 119.08195833333001 | -31.36372222222     | 2000.0 | False         |
| WISEA J080004.08-274149.8 | 120.01704166667    | -27.69711111111     | 2000.0 | False         |
| WISEA J075736.00-263532.4 | 119.4              | -26.59238888889     | 2000.0 | False         |
| WISEA J080138.32-294026.2 | 120.409625         | -29.674027777779997 | 2000.0 | False         |
| WISEA J080155.87-232917.5 | 120.48275          | -23.488194444439998 | 2000.0 | False         |
| WISEA J080353.50-262427.5 | 120.97270833333    | -26.407666666670004 | 2000.0 | False         |
| WISEA J080538.25-234549.8 | 121.40929166667    | -23.76377777778     | 2000.0 | False         |
| WISEA J080452.56-233234.3 | 121.21891666667    | -23.54286111111     | 2000.0 | False         |
| WISEA J080322.16-274625.8 | 120.84229166667    | -27.77375           | 2000.0 | False         |
| WISEA J075824.76-341335.8 | 119.603125         | -34.22663888889     | 2000.0 | False         |
| WISEA J075041.08-302027.1 | 117.67120833333    | -30.340777777779998 | 2000.0 | False         |
| WISEA J075737.71-254019.5 | 119.40720833333    | -25.672111111110002 | 2000.0 | False         |
| WISEA J080305.19-261200.2 | 120.77158333333    | -26.20013888889     | 2000.0 | False         |
| WISEA J075642.27-251630.4 | 119.17666666667    | -25.27525           | 2000.0 | False         |
| WISEA J080845.63-195904.9 | 122.19008333333001 | -19.98469444444     | 2000.0 | False         |
| WISEA J080121.46-325937.6 | 120.33945833333    | -32.99358333333     | 2000.0 | False         |
| 2MFGC 06360               | 120.07895833333001 | -24.80244444444     | 2000.0 | False         |
| WISEA J080604.28-222711.9 | 121.51783333333    | -22.453361111110002 | 2000.0 | False         |
| WISEA J080050.71-315546.1 | 120.21116666667    | -31.92952777778     | 2000.0 | False         |
| WISEA J080430.75-210741.6 | 121.12816666667    | -21.128277777780003 | 2000.0 | False         |
| WISEA J080846.44-195850.1 | 122.1935           | -19.98066666667     | 2000.0 | False         |
| WISEA J075742.41-264622.9 | 119.426875         | -26.773000000000003 | 2000.0 | False         |
| WISEA J075949.40-311808.6 | 119.95595833333    | -31.30186111111     | 2000.0 | False         |
| WISEA J080753.37-184200.6 | 121.97241666667    | -18.70019444444     | 2000.0 | False         |
| WISEA J075925.13-273216.7 | 119.85454166667    | -27.537944444439997 | 2000.0 | False         |
| WISEA J080305.47-224100.3 | 120.77270833333    | -22.68336111111     | 2000.0 | False         |
| WISEA J080208.61-291912.3 | 120.53579166667    | -29.320111111110002 | 2000.0 | False         |
| ESO 561- G 018            | 122.31316666667    | -18.66475           | 2000.0 | False         |
| WISEA J075956.82-221007.9 | 119.98683333333    | -22.168944444439997 | 2000.0 | False         |
| WISEA J080019.29-222538.6 | 120.08045833333    | -22.42744444444     | 2000.0 | False         |
| WISEA J075635.21-310920.5 | 119.14675          | -31.15572222222     | 2000.0 | False         |
| WISEA J080037.19-262016.7 | 120.155            | -26.33797222222     | 2000.0 | False         |
| WISEA J075741.76-264355.8 | 119.42404166666999 | -26.732194444439997 | 2000.0 | False         |
| WISEA J080119.28-254546.8 | 120.33033333333    | -25.763277777779997 | 2000.0 | False         |
| WISEA J080849.87-243120.6 | 122.20779166667    | -24.522333333330003 | 2000.0 | False         |
| WISEA J080513.37-281754.0 | 121.30566666666999 | -28.29836111111     | 2000.0 | False         |
| WISEA J080024.12-291358.9 | 120.1005           | -29.23322222222     | 2000.0 | False         |
| WISEA J080146.90-233949.0 | 120.445375         | -23.663666666670004 | 2000.0 | False         |
| WISEA J075741.82-215313.5 | 119.4225916667     | -21.8875333333      | 2000.0 | False         |
| WISEA J075912.08-320452.1 | 119.80029166666999 | -32.08113888889     | 2000.0 | False         |
| WISEA J081337.76-205947.0 | 123.40728787667    | -20.99666883742     | 2000.0 | False         |
| WISEA J075936.11-240405.5 | 119.9005           | -24.06816666667     | 2000.0 | False         |
| ESO 562- G 006            | 126.58008333333    | -20.847833333329998 | 2000.0 | False         |
| WISEA J075737.28-222127.9 | 119.40533333333    | -22.357777777779997 | 2000.0 | False         |
| 2MFGC 06458               | 122.16295833333    | -18.96966666667     | 2000.0 | False         |
| WISEA J075823.61-215945.7 | 119.59841666667    | -21.99613888889     | 2000.0 | False         |
| WISEA J081633.68-203943.6 | 124.14025          | -20.66216666667     | 2000.0 | False         |
| WISEA J080200.74-305049.0 | 120.50308333333    | -30.84694444444     | 2000.0 | False         |
| WISEA J081234.64-203456.9 | 123.14428087366    | -20.582670999879998 | 2000.0 | False         |
| WISEA J080915.08-184042.2 | 122.31283333333    | -18.678388888889998 | 2000.0 | False         |
| WISEA J080153.89-271051.7 | 120.474625         | -27.181             | 2000.0 | False         |
| WISEA J080032.72-234216.0 | 120.13641666667    | -23.704527777779997 | 2000.0 | False         |
| WISEA J080331.71-223418.1 | 120.88220833333    | -22.57169444444     | 2000.0 | False         |
| WISEA J080747.60-164741.0 | 121.94858333333    | -16.79472222222     | 2000.0 | False         |
| WISEA J080356.16-224518.1 | 120.98404166667    | -22.75513888889     | 2000.0 | False         |
| WISEA J080530.92-224000.2 | 121.378875         | -22.66677777778     | 2000.0 | False         |
| WISEA J080747.12-275243.1 | 121.94641666667    | -27.878666666670004 | 2000.0 | False         |
| WISEA J080416.21-225022.7 | 121.0675           | -22.83961111111     | 2000.0 | False         |
| WISEA J080635.00-251122.3 | 121.645875         | -25.18952777778     | 2000.0 | False         |
| WISEA J080242.28-314114.7 | 120.676125         | -31.687472222220002 | 2000.0 | False         |
| WISEA J080727.07-213047.3 | 121.86254166667    | -21.513277777779997 | 2000.0 | False         |
| WISEA J080525.93-195240.4 | 121.35816666667    | -19.87794444444     | 2000.0 | False         |
| WISEA J080631.77-170335.2 | 121.632375         | -17.05975           | 2000.0 | False         |
| WISEA J075312.93-280929.4 | 118.30383333333    | -28.15858333333     | 2000.0 | False         |
| WISEA J075952.67-194749.0 | 119.96945833333    | -19.79680555556     | 2000.0 | False         |
| WISEA J080959.75-202658.9 | 122.49895833333    | -20.44994444444     | 2000.0 | False         |
| WISEA J080914.06-181640.9 | 122.30854166667    | -18.27808333333     | 2000.0 | False         |
| WISEA J080536.13-195710.7 | 121.4005           | -19.95308333333     | 2000.0 | False         |
| WISEA J082650.20-173131.4 | 126.70933333333001 | -17.52544444444     | 2000.0 | False         |
| WISEA J075951.02-284306.9 | 119.96254166666999 | -28.71863888889     | 2000.0 | False         |
| WISEA J080956.01-202812.3 | 122.48341666667    | -20.47016666667     | 2000.0 | False         |
| WISEA J075343.89-262710.0 | 118.432375         | -26.453083333330003 | 2000.0 | False         |
| WISEA J080039.86-225426.6 | 120.16604166667    | -22.90744444444     | 2000.0 | False         |
| WISEA J080313.34-184212.1 | 120.805625         | -18.70338888889     | 2000.0 | False         |
| WISEA J081805.79-200631.7 | 124.524125         | -20.108861111110002 | 2000.0 | False         |
| WISEA J080924.33-183203.3 | 122.351375         | -18.53425           | 2000.0 | False         |
| WISEA J080317.81-222145.3 | 120.82425          | -22.362555555560004 | 2000.0 | False         |
| WISEA J080435.52-250927.5 | 121.14829166667    | -25.15763888889     | 2000.0 | False         |
| WISEA J080441.65-265812.9 | 121.173625         | -26.970305555560003 | 2000.0 | False         |
| WISEA J081450.20-224614.7 | 123.70916666667    | -22.770805555560003 | 2000.0 | False         |
| WISEA J080009.57-223954.0 | 120.03991666667    | -22.665055555560002 | 2000.0 | False         |
| WISEA J080459.43-220137.1 | 121.247875         | -22.027055555560004 | 2000.0 | False         |
| WISEA J080907.56-181158.2 | 122.2815           | -18.19947222222     | 2000.0 | False         |
| WISEA J081159.16-243338.6 | 122.996625         | -24.56072222222     | 2000.0 | False         |
| WISEA J080912.38-243443.8 | 122.30158333333    | -24.57886111111     | 2000.0 | False         |
| WISEA J080516.67-224920.7 | 121.31945833333    | -22.82247222222     | 2000.0 | False         |
| WISEA J081712.15-183234.6 | 124.300625         | -18.542972222219998 | 2000.0 | False         |
| WISEA J080542.68-201910.6 | 121.42795833333    | -20.31955555556     | 2000.0 | False         |
| WISEA J080810.73-185240.3 | 122.04470833333001 | -18.87788888889     | 2000.0 | False         |
| WISEA J080017.42-302754.0 | 120.07258333333    | -30.465055555560003 | 2000.0 | False         |
| WISEA J081501.64-153307.4 | 123.75675          | -15.552111111110001 | 2000.0 | False         |
| WISEA J081517.44-153501.2 | 123.82270833333    | -15.583777777779998 | 2000.0 | False         |
| WISEA J080956.88-181207.8 | 122.487            | -18.20216666667     | 2000.0 | False         |
| WISEA J075828.26-215615.8 | 119.617875         | -21.93763888889     | 2000.0 | False         |
| 2MFGC 06428               | 121.64708333333    | -22.28011111111     | 2000.0 | False         |
| WISEA J075810.03-220043.5 | 119.54183333333    | -22.01208333333     | 2000.0 | False         |
| WISEA J080605.03-222702.5 | 121.52108333333    | -22.45061111111     | 2000.0 | False         |
| WISEA J075933.36-261932.0 | 119.88904166667    | -26.325583333330002 | 2000.0 | False         |
| WISEA J075924.85-245608.9 | 119.85358333333001 | -24.93588888889     | 2000.0 | False         |
| WISEA J080925.70-240557.8 | 122.357125         | -24.099444444439996 | 2000.0 | False         |
| WISEA J080042.67-240138.6 | 120.178            | -24.027444444439997 | 2000.0 | False         |
| WISEA J082658.51-155219.2 | 126.74345833333    | -15.87186111111     | 2000.0 | False         |
| WISEA J081158.43-164931.9 | 122.99358333333001 | -16.82588888889     | 2000.0 | False         |
| WISEA J080720.26-244703.5 | 121.83445833333    | -24.78433333333     | 2000.0 | False         |
| WISEA J081400.98-243844.8 | 123.504125         | -24.64575           | 2000.0 | False         |
| WISEA J075856.14-222043.6 | 119.73395833333001 | -22.345444444439998 | 2000.0 | False         |
| WISEA J075905.75-305442.0 | 119.77391666667    | -30.911638888890003 | 2000.0 | False         |
| WISEA J080109.69-242611.7 | 120.29033333333    | -24.43675           | 2000.0 | False         |
| WISEA J075624.12-242219.1 | 119.10058333333001 | -24.37211111111     | 2000.0 | False         |
| WISEA J081502.02-225348.8 | 123.75845833333    | -22.89694444444     | 2000.0 | False         |
| WISEA J080818.42-184108.0 | 122.07725          | -18.68544444444     | 2000.0 | False         |
| WISEA J081216.71-214718.8 | 123.06966666667    | -21.788583333330003 | 2000.0 | False         |
| WISEA J075854.50-221719.0 | 119.72704166667    | -22.288555555560002 | 2000.0 | False         |
| WISEA J081600.02-212715.7 | 124.00016666667    | -21.454388888889998 | 2000.0 | False         |
| WISEA J075712.74-270416.8 | 119.30304166667    | -27.071416666670004 | 2000.0 | False         |
| WISEA J081055.98-180513.8 | 122.73307212373001 | -18.087308847430002 | 2000.0 | False         |
| WISEA J081412.63-222106.2 | 123.552625         | -22.351833333330003 | 2000.0 | False         |
| WISEA J081537.08-172050.9 | 123.90442362456999 | -17.347485491489998 | 2000.0 | False         |
| WISEA J075545.26-295700.2 | 118.93866666667    | -29.95011111111     | 2000.0 | False         |
| WISEA J075850.14-224333.0 | 119.70895833333    | -22.72577777778     | 2000.0 | False         |
| WISEA J075346.81-265618.4 | 118.445            | -26.93852777778     | 2000.0 | False         |
| WISEA J081257.98-212831.4 | 123.241625         | -21.475416666670004 | 2000.0 | False         |
| WISEA J080904.03-231517.5 | 122.26691666667    | -23.25486111111     | 2000.0 | False         |
| WISEA J080110.53-302044.4 | 120.293875         | -30.34569444444     | 2000.0 | False         |
| WISEA J075839.65-342257.2 | 119.66529166667    | -34.38255555556     | 2000.0 | False         |
| WISEA J075812.54-204429.8 | 119.552125         | -20.74161111111     | 2000.0 | False         |
| WISEA J080424.28-191534.9 | 121.10116666667    | -19.25972222222     | 2000.0 | False         |
| WISEA J080051.96-230232.6 | 120.2165           | -23.04236111111     | 2000.0 | False         |



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