LOTAAS confirmed discoveries

#	Pulsar	P (ms)	DM (pc/cc)	Single pulse	Confirmation	Localization	Discovery date	Notes
2019 (1)
74	J1958+21	1050	87.7		Oct 30, 2019	beam 19	Sep 2, 2019	First FFA discovery!
2018 (7)
73	J0827+53	13	23.1		Dec 7, 2018	beam 10	Nov 28, 2018	MSP binary!
72	J1333+09	911	23.9		Aug 25, 2018	beam 23	Aug 20, 2018	found in 2 adjacent beams
71	J1303+38	396	19.0		Aug 24, 2018	beam 37	Jul 23, 2018	found in 3 adjacent beams
70	J1706+35	159	19.2		Jun 4, 2018 Jun 19, 2018	beam 3 beam 26	May 23, 2018	found in 4 adjacent beams and incoherent beam timing: LF
69	J2022+21	803	73.5		May 6, 2018 [search pipe] May 26, 2018	beam 9 beam 10 beam 28	May 3, 2018	timing: LF
68	J0813+22	531	52.2		Apr 27, 2018 May 5, 2018 [search pipe]	beam 5 beam 5 beam 5	Apr 21, 2018	found among many sidelobe detections of B0823+26; timing: LF
67	J1910+56	341	20.7		Jan 17, 2018	beam 9	Jan 11, 2018	found in 3 adjacent beams; timing: LF
2017 (20)
66	J2123+36	1294	108.4		Dec 19, 2017	beam 3	Dec 16, 2017	found in 3 adjacent beams; timing: LF
65	J1953+30	1271	43.6		Dec 19, 2017	beam 9	Dec 15, 2017	found in several beams, very bright; timing: LF
64	J0100+69	1145	63.5		Dec 16, 2017	beam 3	Dec 5, 2017	found in two adjacent beams; timing: LF
63	J1426+52	995	25.3		Dec 10, 2017	beam 9	Oct 5, 2017	timing: LF
62	J1958+56	311	58.1		Dec 9, 2017 [search pipe] Dec 19, 2017 [search pipe]	beam 36 beam 36 beam 22 beam 12	Sep 27, 2017	timing: LF
61	J0210+58	1766	76.8		Dec 10, 2017 [search pipe] Dec 17, 2017	beam 1 beam 1 beam 23	Sep 22, 2017	timing: LF
60	J1017+30	452	27.3		Dec 10, 2017	beam 19	Aug 28, 2017	found in two adjacent beams; timing: LF
59	J2034+66	501	50.7		Dec 9, 2017	beam 44	Aug 15, 2017	found in two adjacent beams; timing: LF
58	J0107+13	1197	21.6		Aug 16, 2017	beam 19	Aug 13, 2017	timing: LF
57	J0249+58	23535	45.7		confirmed	confirmed	Aug 7, 2017	timing: LF
56	J1657+32	1570	23.9		Jun 30, 2017	beam 9	Jun 29, 2017	timing: LF
55	J1740+38	828	47.2		Jun 30, 2017 [search pipe]	beam 22 beam 10	Jun 27, 2017	timing: LF
54	J1638+40	767	33.3		Jun 30, 2017 [search pipe] Jul 3, 2017	beam 8 beam 8 beam 13	Jun 24, 2017	timing: LF
53	J2122+24	541	8.4		Jun 18, 2017	beam 30	Jun 1, 2017	found in two adjacent beams; timing: LF
52	J0059+80	1493	55.7		Jun 17, 2017 Jul 9, 2017	beam 5 beam 11	May 30, 2017	timing: LF
51	J1745+12	1059	65.9		Jun 17, 2017 Jun 30, 2017 [search pipe]	beam 6 beam 8 beam 7	May 17, 2017	timing: LF
50	J1642+12	1099	35.7		Mar 21, 2017 (IS) May 24, 2017	beam 64	Mar 16, 2017	found in extra manual beam; on Mar 21, 2017 confirmed only in IS beam, although was also detected in beam9 with much lower significance; timing: LF
49	J1710+78	432	37.0		Mar 15, 2017 Mar 21, 2017 Jul 22, 2017 [search pipe] Jul 28, 2017	beam 23 beam 6 beam 22 beam 10 beam 3	Feb 6, 2017	found in two adjacent beams; timing: LF
48	J1810+06	307	79.4		Jan 24, 2017	beam 3	Jan 22, 2017	found in two adjacent beams; timing: LF
47	J1749+59	436	45.0		Jan 16, 2017	beam 1	Jan 5, 2017	timing: LF
2016 (23)
46	J1658+36	33	3.0		Jan 20, 2017	beam 8	Dec 24, 2016	1st LOFAR binary! found in extra manual beam; timing: LF, JB - no show
45	J0454+45	1389	20.8		Jan 16, 2017	beam 27	Dec 22, 2016	timing: LF
44	J1957+00	965	38.3		Jan 10, 2017	beam 77	Dec 12, 2016	timing: LF
43	J1624+58	651	26.4		Jan 9, 2017	beam 19	Dec 7, 2016	timing: LF
42	J1655+62	776	35.3		Jan 21, 2017	beam 4	Dec 2, 2016	timing: LF
41	J1916+32	1137	84.2		Jan 10, 2017	beam 20	Nov 25, 2016	timing: LF
40	J0421+32	900	76.9		Jan 16, 2017	beam 2	Nov 4, 2016	S/N for beam 8 is larger in the TA heatmap, but map was done for 1024-bin profiles and it picked on the noise spike; timing: LF
39	J2329+47	728	43.9		Oct 20, 2016	beam 5	Sep 12, 2016	timing: LF
38	J1634+23	1208	37.5		Oct 25, 2016	beam 22	Sep 9, 2016	found in two adjacent beams; timing: LF
37	J0121+14	1388	17.8		Jul 14, 2016	beam 11	Jul 8, 2016	found in extra manual beam; timing: LF
36	J1404+11	2650	18.5	Jul 6, 2016	Jul 14, 2016	beam 1	Jul 6, 2016	Possibly a pulsar reported by Adam Chandler in his PhD thesis; DM is well off though; timing: LF
35	J0139+33	1248	21.2	Jul 5, 2016	Sep 8, 2016	beam 61	Jul 5, 2016	Found only in SP searches
34	J1932+53	2052	33.4		Mar 21, 2017	beam 40	Jun 22, 2016	one follow-up non-detection on Jul 16, 2016
33	J0742+43	606	36.1		May 18, 2016	beam 22	May 17, 2016	timing: LF
32	J0856+33	242	23.9		May 18, 2016	beam 24 beam 18	May 13, 2016	timing: LF
31	J0114+63	521	65.0		May 14, 2016	beam 11	May 3, 2016	timing: LF
30	J0518+51	912	39.3		Mar 25, 2016 [search pipe]	beam 9 [search pipe]	Mar 20, 2016	timing: LF
29	J0349+23	2421	63.1		Mar 11, 2016 [search pipe]	beam 21 [search pipe]	Mar 8, 2016	timing: LF
28	J1849+26	519	74.9		Jan 29, 2016 [Jan 29, 2016, search pipe]	beam 25 [beam 25, search pipe]	Jan 28, 2016	timing: LF
27	J2051+12	553	43.4		Jan 27, 2016	beam 17	Jan 25, 2016	timing: LF
26	J1340+65	1394	30.0		Jan 20, 2016 (IS) Jan 24, 2016 (Sterp) [Jan 24, 2016, Sterp, search pipe] Jan 27, 2016 (Core)	beam 39 (Sterp) [beam 39, Sterp, search pipe] beam 25 (Core)	Jan 18, 2016	on Jan 20 confirmed only in IS beam; timing: LF
25	J1235–02	3597	18.8		Jan 20, 2016 May 20, 2017	beam 8 beam 21	Jan 18, 2016	found in 2 beams; timing: LF, JB
24	J1225+00	2284	18.5		Jan 20, 2016 May 20, 2017	beam 3 beam 23	Jan 18, 2016	timing: LF
2015 (13)
23	J1733+63	510	41.8		Sep 23, 2015	beam 24	Aug 30, 2015	timing: LF, JB - good timer
22	J0039+35	536	53.0		Aug 24, 2015	beam 24	Aug 18, 2015	timing: LF, JB - no show
21	J1745+42	305	37.9		Aug 23, 2015	beam 1	Aug 17, 2015	timing: LF, JB - good timer
20	J1715+46	548	19.8		Aug 23, 2015	beam 13	Aug 14, 2015	timing: LF, JB - no show
19	J1726+34	821	23.9		Aug 23, 2015 (IS) Oct 12, 2015 Oct 30, 2015 (Sterp) Nov 5, 2015	beam ? beam 40 beam 123 (Sterp) beam 10	Aug 12, 2015	two follow-up obs; localized in beam 40 in the 2nd obs; judging from Superterp observation was originally detected in a sidelobe; final localization on Nov 5, 2015 with the 4th follow-up observation; timing: LF, JB?
18	J0928+30	1045	21.9		Aug 22, 2015	beam 11	Aug 10, 2015	found in extra manual beam; timing: LF, JB - no show
17	J2053+17	119	27.0		Jul 18, 2015	beam 24	Jul 16, 2015	found in 3 overlapping manual beams from different SAPs; timing: LF, JB - no show
16	J0810+37	1248	16.9		Feb 7, 2016 (Sterp) Mar 12, 2016 (Core) [search pipe]	beam 1 (Sterp) beam 24 (Core) [search pipe]	Jul 15, 2015	Nuller; Four follow-up non-detections: 16.07, 31.07, 21.08 (too much RFI, due to Sun?), 06.11; Finally confirmed on Feb 7, 2016 with the Superterp, and better localized with the Core on Mar 12, 2016; timing: LF
15	J2006+22	1741	130.4		Jul 16, 2015	beam 1	Jul 14, 2015	JB - no show; timing: LF
14	J1740+27	1058	35.5		Jun 28, 2015	beam 16	Jun 24, 2015	timing: LF, JB
13	J2210+21	1776	46.3		Jun 23, 2015	beam 17	Jun 15, 2015	timing: LF, JB
12	J0301+20	1207	19.0	Apr 2, 2015	Aug 9, 2015 (IS) Aug 9, 2015 (IS, SP) Jan 24, 2016 (redetection in another survey pointing) Jan 27, 2016 [re-confirmation]	Disc: beam 45 Conf: beam 53? Conf: beam 1 (IS, SP) beam 3 [re-confirmation]	Apr 2, 2015	Originally thought to be a RRAT; timing: LF
11	J1849+15	2233	77.4	Mar 19, 2015	Apr 28, 2015	Disc: beam 56 Conf: beam 17	Mar 19, 2015	RRAT @discovery; timing: LF, JB
2014 (10)
10	J2305+31	341	46.1		Feb 22, 2015	beam 4	Dec 9, 2014	timing: LF, JB
9	J1814+22	253	62.3		Sep 4, 2014	beam 7	Sep 1, 2014	timing: LF, JB
8	J2336–01	1029	19.6		Aug 25, 2014	beam 7	Aug 22, 2014	JB - no show; timing: LF
7	J2057+21	1116	73.6		Aug 25, 2014	beam 27	Aug 9, 2014	JB - no show; timing: LF
6	J0305+11	862	27.8		Aug 13, 2014 Jun 17, 2017	beam 19 beam 54	Aug 9, 2014	JB - no show; timing: LF
5	J0317+13	1974	12.9	BEAM15, 23	Aug 13, 2014	beam 11	Aug 9, 2014	JB - no show; timing: LF
4	J1809+17	2066	47.0		Jun 12, 2014	beam 21	Jun 11, 2014	JB - no show; timing: LF
3	J2350+31	508	39.1		Jun 6, 2014	beam 24	May 22, 2014	JB - no show; timing: LF
2	J0935+33	961	18.4		Mar 7, 2014	beam 1	Mar 3, 2014	JB - no show; timing: LF
1	J1529+40	476	6.6		Mar 6, 2014	beam 17	Feb 26, 2014	timing: LF, JB

LOTAAS non-confirmed (yet) candidates

#	Pulsar	P (ms)	DM (pc/cc)	Single pulse	Discovery date	Notes
8	J1011+18	291	17.7		Aug 20, 2018	One follow-up non-detection using Full Core on Aug 24, 2018
7	J1703+00	638	10.3		Aug 7, 2018	One follow-up non-detection using Full Core on Aug 23, 2018
6	J1838+00	127	98.2		Aug 26, 2017	found in two adjacent beams; Three follow-up non-detections on Dec 9 and 19, 2017 and on Jan 17, 2018
5	J2354+40	387	20.5	Oct 2, 2016	Oct 2, 2016	RRAT
4	J0215+51	384	18.4	Oct 2, 2016	Oct 2, 2016	RRAT
3	J0418+22	45	5.6	Jul 5, 2016	Jul 5, 2016	Found only in SP searches
2	J2025+31	6.3	13.6		Apr 22, 2016	1st LOTAAS MSP? Two follow-up non-detections with the Core on Apr 27 and May 17; 3rd follow-up on June 24th; 4th follow-up with the Superterp (1-ring) on May 20th, 2017
1	J1342+65	122	38.7		Jan 22, 2016	found in the follow-up observation of the J1340+65; Two follow-up non-detections with the Superterp on Jan 27 and Feb 2; Follow-up on Mar 27, 2017 with the Full Core

LOFAR targeted searches for pulsars

#	Pulsar	P (ms)	DM (pc/cc)	Single pulse	Confirmation	Localization	Discovery date	Notes
7	J1158+6224	7.88	15.0		Jan 7, 2021	beam 0	Jan 4, 2021	TULIPP; LoTSS targeted searches
6	J1602+3901	3.7	17.2		May 3, 2020	beam 0	Apr 10, 2020	TULIPP; LoTSS targeted searches
5	J1049+5822	727	12.3		Aug 19, 2019	beam 0	Aug 19, 2019	TULIPP; LoTSS targeted searches
4	J0952-0607	1.41	22.4		Jan 4, 2017	beam 5	Dec 29, 2016	MSP; Fermi searches
3	J0652+47	4.75	25.5		Feb 27, 2017	beam 3	Dec 28, 2016	MSP; Fermi searches
2	J1552+5436	2.42	22.9		Mar 24, 2016	beam 5	Mar 20, 2016	1st LOFAR MSP!, Fermi searches; timing: LF
1	J0815+4611	434	11.3	Dec 15, 2014	Apr 3, 2015	beam 1	Dec 15, 2014	EOR field, Candi-2; timing: LF

LOTAS pilot survey (LOTAAS predecessor)

#	Pulsar	P (ms)	DM (pc/cc)	Single pulse	Confirmation	Localization	Discovery date	Notes
2	J0613+37	619	19.1		Jan 19, 2013		Jan 14, 2013	timing: LF, JB
1	J0140+56	1775	101.6		Jan 17, 2013		Jan 14, 2013	timing: LF, JB

LOTAAS is the LOFAR Tied-Array All-Sky Survey, an ongoing LOFAR all-Northern-sky survey. LOTAAS uses the 12 HBA sub-stations on the Superterp because these give the highest filling factor of any set of stations in the array and hence the best balance of FoV and raw sensitivity. This compact configuration also completely removes the need to compensate for differential ionospheric phase delays. Each LOTAAS survey pointing (see Figure below) is comprised of three sub-array pointings (i.e. three beams generated at station level). An incoherent array beam is generated for each of these sub-array pointings, and together these cover ∼30 square degrees of sky (towards Zenith) at a sensitivity roughly twice that of our all-sky pilot commissioning survey (Coenen 2013). Within the FoV of each incoherent beam we also form a Nyquist-sampled, hexagonal grid of 61 tied-array beams. Together, this set of 3×61 tied-array beams cover a survey area of ∼10 square degrees at a sensitivity roughly twice that of the ongoing GBNCC survey. Lastly, for each sub-array pointing an additional 12 tied-array pointings are generated and pointed towards any other cataloged pulsars that fall within the incoherent FoV but outside the hexagonal grid of tied-array beams used for surveying. These additional beams provide valuable data on known sources, simultaneous with the survey observations. All together, there are 3×61+3×12+3 = 222 beams per survey pointing. In other words, this is a pulsar and fast transient survey approach unlike any other and a unique stepping stone on the path to surveying with SKA-Low. With a bandwidth of 32 MHz, a spectral resolution of 12 kHz, and a sampling time of 492 μs, LOTAAS generates data at an astounding rate of 35 Gbps (close to the total possible system throughput of the LOFAR CEP2 network). Each 1-hour pointing produces 16 TB of raw data.

Left. A single LOTAAS pointing showing the 3 groups of 61 tied-array beams each (hexagonal clusters of small circles) and the 3 incoherent beams (large circles). For simplicity, the additional 12 manually specified tied-array beams, which are pointed towards known sources in the field, are not shown. Right. Multiple interleaved LOTAAS pointings showing how dense coverage of the sky is achieved.

Sky coverage:

LOTAAS minimum theoretical flux:

Minimum theoretical flux of Superterp at DM = 50 and DM = 300 pc/cc, for low (solid lines) and high (dashed lines) Galactic latitudes. This includes a scattering term based on Bhat et al. (2004). The fluxes of known pulsars so far found within the LOTAAS survey (red) and LOTAAS discoveries (blue stars) are also plotted. This shows that we are within a factor of 3 in terms of reaching the theoretical survey sensitivity, and will have to dig deeper into our existing search candidate lists to find the weakest sources.

Publications:

LOFAR Pulsar Working Group members:

Other pulsar surveys:

• GBT 350-MHz Driftscan Survey
• GBNCC [old, spreadsheet]
• PALFA
• AO 327-MHz Drift Survey
• CRAFTS (The Commensal Radio Astronomy FAST Survey)
• CRAFTS (only pulsars confirmed also by Parkes/Effelsberg)
• HTRU-South Low-lat
• HTRU-South Med-lat & Hi-lat
• RRATalog
• RRATs in GBT350 Driftscan
• GHRSS (GMRT High Resolution Southern Sky survey)
• SUPERB (Parkes)
• DMB (must be in the ATNF catalog already)
• List of all Galactic MSPs (published and not yet)
• PMPSWVU

Known FRBs:

• Dunc's plain text list of FRBs
• Swinburne's FRB catalogue
• F&M FRBs page
• FRB 140514: data
• Parkes FRBs: archival data
• UTMOST (FRBs monitoring with Molonglo Observatory Synthesis Telescope)