Homepage von Bernd DL7APV Pulsare detection

Mit dieser großen Antenne kann man nicht nur EME machen, sondern auch ein wenig Radioastronomie!

With this huge antenna not only EME is possible, but also a bit radio astronomy!

JO62jr 40m asl.

Setup is here the 432 MHz EME Antenna on main page

128x11el. H-Pol. with

35,85 dBi gain @432MHz

Tsys=97K

RX RTL dongle V3

2MHz BW

and Airspy with 10MHz BW

Many TNX to Hannes OE5JFL who invested a lot of time to confirm my detections with Presto, and I0NAA, IW5BHY and PA3FXB, for software and help!

See for basics and more:

http://neutronstar.joataman.net/ and

http://i0naa.altervista.org/ and

http://iw5bhy.altervista.org/ and

https://www.qsl.net/oe5jfl/pulsar/pulsar.htm

http://www.k5so.com/documents--and-downloads/download-tempo_calc.html

First attempt in 2018: B0329+54 was detected within only 200sec.

The B0329+54 is the strongest on 432 in the northern hemisphere!

With longer integration time this pulsar could be seen even with very small antennas!!!

Detected were currently around 100 pulsars, but seems this is close to maximum possible with my system.

More bandwidth is the only possible optimization what can be done, but QRM does limit this here.

Used Software Tempo & Murmur & extern OE5JFL with presto

Update June 2021 S/N Theory was corrected with background temp

Update sept 2021: in most cases the 10MHz S/N better, but there are some cases vice versa. So qrm seems to be a big factor, but there are not many possibilities to optimize.

The 10MHz bandwidth I checked with sun noise and as expected at the ends of the band it drops.

The SWR is as well not 100% over the full bandwidth but acceptable:

The gain is also very good over the frequency:

Measured sun noise at the 10MHz airspy is:

QRG/MHz	sun/dB
428,5	17,5
429,5	18
430,5	19
431,5	19
432,5	20
433,5	19,5
434,5	18,5
435,5	18,5
436,5	17,5
437,5	17
438,5	17,5

Compared with the 2,2MHz RTL dongle (same time)

QRG/MHz	sun/dB
430,5	21,9
431,5	21,5
432,5	20,9

The absolute values are not 100% but relative seems like room for optimization

	Name of Pulsar	S/N # theory With 2Mhz	Measured S/N With 2Mhz	Date of first detection	Recording time	2^nd test 6h and 2MHz BW S/N	2^nd Test 6h and 10MHz BW S/N	Pictures & Files
	B0031-07	16,4	5,1	2021 Aug 11^th	6h			B0031-07
	B0136+57	13,2	9,5	Sept 2^nd 2020	5h			B0136+57
	B0138+59	14,5	10,1	June 16^th2020	3h			B0138+59
	B0148-06	10,7	6,3	July 6^th 2020 & more	3h			B0148-06
	B0149-16	16,7	6,0	February 5^th 2021	6h			B0149-16
	B0301+19	15,6	8,1	October 21^st 2020	5h			B0301+19
	B0320+39	19,5	7,9	June 29^th 2020	3h	11,5	9	B0320+39
	B0329+54	740,7	111	May 4^th 2020 Strongest!!	2h			B0329+54
	B0301+19	15,6	8	October 20^th 2020	5h			B0301+19
	B0355+54	9,7	6,5	May 16^th 2020	1h	12,4	28,9	B0355+54
	B0450+55	13,8	7,0	May 16^th 2020	1h			B0450+55
	B0450-18	17,3	12,3	May 16^th 2020	1h			B0450-18
	B0525+21	14,9	5,4	May 16^th 2020	2h	6,4	3,9	B0525+21
	B0531+21	120,1	10,6	May 6^th 2020	3h	4,4	5,4	B0531+21
	B0540+23	13,4	8	July 6^th 2020	3h			B0540+23
	B0559-05	11,3	5,9	January 25^th 2021	6h			B0559-05
	B0611+22	18,7	8,4	Sept 3^rd 2020	5h			B0611+22
	B0626+24	15,5	12,8	July 17^th 2020	3h			B0626+24
	B0628-28	70,2	12	July 15^th 2020	3h			B0628-28
	B0727-18	10,9	4,6*	July 29^st 2021	6h			B0727-18
	B0740-28	79,9	11	July 15^th 2020	1h			B0740-28
	B0809+74	28	6,9	May 11^th 2020	1h	14	8	B0809+74
	B0818-13	34,8	8,3	May 12^th 2020	1h	38	54	B0818-13
	B0820+02	21,2	7	Sept 5^th 2020	5h			B0820+02
	B0823+26	33,2	17,5	May 11^th 2020	1h			B0823+26
	B0834+06	30,3	22,5	April 20^th 2020	1h			B0834+06
	B0906-17	12,7	6,2	May 3^rd 2021	6h			B0906-17
	B0919+06	22,3	5,2	May 16^th 2020	1h	8,6	11	B0919+06
	B0942-13	25,2	18,9	august 4^th 2020	5h			B0942-13
	B0950+08	100,5	38	April 25^th 2020	1h	46	80	B0950+08
	B1039-19	11,6	7,8	July 18^th 2021	6h			B1039-19
	B1112+50	14	7,6	January 19^th 2021	6h			B1112+50
	B1133+16	174,5	35	April 25^th 2020	1h	40	40	B1133+16
	B1237+25	27,5	7,7	May 11^th 2020	1h	11	8	B1237+25
	B1254-10	12,9	6,3*	July 30^th 2021	6h			B1254-10
	B1508+55	42,5	12,3	May 6^th 2020	1h	30	49	B1508+55
	B1540-06	30,3	6,0	June 22^nd 2020	3h	9	12	B1540-06
	B1541+09	20	4,6	June 28^th 2020	3h			B1541+09
	B1600-27	12,9	5,6	May 15^th 2021	6h			B1600-27
	B1604-00	25,1	10	June 23^rd 2020	3h	5	7,7	B1604-00
	B1642-03	165	85	April 24^th 2020	1h	154	252	B1642-03
	B1706-16	25,3	6	June 25^th 2020	3h	23,2	33,5	B1706-16
	B1717-16	12,4	7,1	July 21^s 2021	6h			B1717-16
	B1718-32	20,7	6	November 2^nd 2020	4h			B1718-32
	B1732-07	11	8,9	November 21^st 2020	6h			B1732-07
	B1737+13	10,1	7,6	January 16^th 2021	6h			B1737+13
	B1738-08	10,8	9,5	November 17^th 2020	6h			B1738-08
	B1742-30	13,8	4,0	January 26^th 2021	4h			B1742-30
	B1745-12	10,6	5,3	May 19^th 2021	6h			B1745-12
	B1749-28	262,9	95	July 14^th 2020	3h			B1749-28
	B1758-03	6	4,9	May 13^th 2021	6h			B1758-03
	B1804-08	12,2	10,6	August 3^rd 2020	5h			B1804-08
	B1818-04	36,6	19,9	June 20^th 2020	3h	40	50,6	B1818-04
	B1819-22	5,8	7,3	November 25^th 2020	5h			B1819-22
	B1821-19	34	7,2	August 8^th 2020	5h			B1821-19
	B1821+05	14,3	9	may 16^th 2021	6h			B1821+05
	B1822-09	14,3	8,2	July 17^th 2020	3h			B1822-09
	B1826-17	17,2	5,2	July 15t^h 2021	6h			B1826-17
	B1831-03	32,8	5,5	July 8^th 2020	3h			B1831-03
	B1831-04	<6	4,4	August7^th 2020 My weakest so far	5h			B1831-04
	B1834-10	20,6	7	July 22^nd 2020	5h			B1834-10
	B1839+09	7,9	4,5	May 10^th 2021	6h			B1839+09
	B1839+56	15,1	5	November 24^th 2020	6h			B1839+56
	B1842+14	10,1	6,5	May 6^th 2021	6h			B1842+14
	B1844-04	12,4	6	July 10^th 2020	3h			B1844-04
	B1845-01	19,9	7	August 6^th 2020	5h			B1845-01
	B1857-26	25	5,2	August 4^th 2020	5h			B1857-26
	B1859+03	42,3	4,5	June 21^st 2020	3h	3	3	B1859+03
	B1900+01	21,4	9,8	August 2^nd 2020	5h			B1900+01
	B1905+39	9,2	7,1	January 25^th 2021	6h			B1905+39
	B1907-03	9,5	7,7	November 13^th 2020	6h			B1907-03
	B1907+10	14,9	10,5	July 15^th 2020	3h			B1907+10
	B1911-04	32,4	20	June 15^th 2020	2h			B1911-04
	B1914+09	5	5,3	May 10^th 2021	6h			B1914+09
	B1915+13	15,5	7,0	July 8^th 2020	5h			B1915+13
	B1918+19	9,8	5,7	August 5^th 2020	5h			B1918+19
	B1919+21	18	21,2	June 27^th 2020	3h	28	33,8	B1919+21
	B1920+21	16,7	5,8	June 27^th 2020	3h			B1920+21
	B1929+10	49	18,5	May 1^st2020	1h	61	119,5	B1929+10
	B1929+20	11,4	5,3	Aug 2^nd 2020	6h			B1929+20
	B1933+16	58,2	42	May 1^st2020	1h	53	102	B1933+16
	B1944+17	13,1	6,4	July 13^th 2020	3h			B1944+17
	B1946+35	22,7	12	May 6^th 2020	1h	28	31	B1946+35
	B1953+50	14	11,0	August 4^th 2020	5h			B1953+50
	B2000+40	16,5	5,0	June 15^th 2020	3h	4,6 / 4,1	4,0 / 7,1	B2000+40
	B2002+31	6	6,2	January 11^th 2021	6h			B2002+31
	B2016+28	59,5	56	April 30^th 2020	1h	24	97	B2016+28
	B2020+28	11,7	17,8	June 10^th 2020	2h	18	33	B2020+28
	B2021+51	28,7	3,9	June 15^th 2020	2h	22	31	B2021+51
	B2027+37	8,4	6,3	January 15^th 2020	6h			B2027+37
	B2043-04	18,2	10	November 23^rd 2020	6h			B2043-04
	B2044+15	12,6	5,6	January 17^th 2020	6h			B2044+15
	B2045-16	123	13,1	June 20^th 2020	3h	19	14	B2045-16
	B2053+36	11	6,1	October 29^th 2020	6h			B2053+36
	B2110+27	15,4	12,4	November 12^th 2020	6h			B2110+27
	B2111+46	33,1	8,7	May 1^st 2020	1h	13	13	B2111+46
	B2148+63	11,3	10,7	June 30^th 2020	3h			B2148+63
	B2154+40	23,7	11,4	May 12^th 2020	1h	12	11	B2154+40
	B2217+47	34	36	May 2^nd 2020	1h	48	37	B2217+47
	B2255+58	9	7,7	July 7^th 2020	3h			B2255+58
	B2310+42	22,9	7,6	May 12^th 2020	1h	20	28	B2310+42
	B2319+60	6,8	8,3	July 3^rd 2020	4h			B2319+60
	B2303+30	22	8,0	August 31^st 2020	5h			B2303+30
	B2315+21	14,1	7,99	January 12^th 2021	6h			B2315+21
	B2327-20	65,2	15,2	August 6^th 2020	5h			B2327-20
	B2351+61	10,3	4,6	October 28^th 2020	5h			B2351+61
*Only with 10MHz Bandwidth decoded # Calculated with Murmur + background temp at given time Unsuccessful attempts or unclear
	B1913+10	13,9	nil	Sept 1^st 2020	5h			B1913+10
	J1808-0813	8,6	5,9 ?a bit too weak?	November 16^th 2020	6h		Better with correct .par file	J1808-0813
	B1923+04	9,3/10,8	4,7 + 4,7 Too weak?	November 18^th 2020 & June 2021	6h 8h			B1923+04
	B2224+65	7,8	4,79 ???	January 16^th 2021	6h			B2224+65
	B1937-26	13,7	5 ?	July 20^th 2021	6h			B1937-26
	B1845-19	<6	5,7 ??	May 21^st 2021	6h			B1845-19
	B1900+05	<6	5,4??	May 25^th 2021	8h			B1900+05
	B1804-27	<6	nil	Oct 27^th 2020	5h			B1804-27
	B1907+02	<6	nil	November 14^th 2020	6h			B1907+02
	B1917+00	<6	4,6 ??	November 22^nd 2020	6h			B1917+00
	B1907+00	<6	6 ???	May 18^th 2021	6h			B1907+00
	B1940-12	<6	5,9?	May 22^nd 2021	6h			B1940-12
	B1737-30	<6	nil	October 20^th 2020 & January 2021	4h	Not possible	Too short above horizon and Sagittarius behind	B1737-30
	B1900+06	14,6	nil	October 19^th 2020	5h	Not possible	to detect with my software	B1900+06

If anybody needs a special record drop me a mail!

431.5 at start in May 2020
Changed to 431.4 26.6.2020
changed to 431.2 at 13.7.2020 12:00 UTC
July 2021 10MHz Airspy added

All recorded with 2MHz BW and 4 channels done with NI Labview runtime and software from IW5BHY, tnx Andrea!
since July 2021 also 10MHz with Airspy + Presto used in parallel

Last update Jan 2024