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Number crunching :
Isn't 30 Pulses with 30 Repeating Pulses Kinda High for AstroPulse?
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TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
I don't remember seeing one that high, however, I haven't been doing this very long. It finished early too, usually it takes around 40 minutes. Found 30 single pulses and 30 repeating pulses, exiting. percent blanked: 0.00 Interesting... |
Josef W. Segur Send message Joined: 30 Oct 99 Posts: 4504 Credit: 1,414,761 RAC: 0 |
That's the astropulse early exit which serves the same function as result_overflow in MB tasks. It doesn't happen as often because there are separate limits of 30 for the two basic types, where MB quits on a total of all types it processes. The zero blanking indicates there wasn't a huge amount of RFI, but that comes in all kinds and amounts so is the most likely cause. But we're here to find the very unlikely possibilities... Joe |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
That's the astropulse early exit which serves the same function as result_overflow in MB tasks. It doesn't happen as often because there are separate limits of 30 for the two basic types, where MB quits on a total of all types it processes. It appears to have found an active area. Here's another one that threw down the slide-rule and raised it's hand in half the time as the last; Found 30 single pulses and 30 repeating pulses, exiting. percent blanked: 0.00 This one almost reached the point; single pulses: 22 repetitive pulses: 30 percent blanked: 0.00 It would be nice to know if we are analyzing reruns of Gilligan's Island or if something more interesting is making all that noise. If I had the coordinates I could look it up on the program Starry Night and see if there are any Pulsars close by... |
BilBg Send message Joined: 27 May 07 Posts: 3720 Credit: 9,385,827 RAC: 0 |
If I had the coordinates I could look it up ... The coordinates are in the WU files (both for astropulse and MB): <astropulse_workunit> <workunit_header> <name>ap_12no12aa_B1_P1_00195_20121217_20994.wu</name> <tape_info> <name>12no12aa</name> <start_time>2456243.7446014</start_time> <last_block_time>2456243.7747359</last_block_time> <last_block_done>12547</last_block_done> <wu_count>195</wu_count> <beam>1</beam> <polarization>1</polarization> </tape_info> <receiver_cfg> <s4_id>6</s4_id> <name>Arecibo 1.4GHz Array, Beam 1, Pol 1</name> <beam_width>0.0500000007</beam_width> <center_freq>1420</center_freq> <latitude>18.3538056</latitude> <longitude>-66.7552222</longitude> <elevation>497</elevation> <diameter>168</diameter> <az_orientation>180</az_orientation> <az_corr_coeff length=99 encoding="x-csv"> -37,-6.05,92.35,-731.21,-1013.97,-24.53,-11.19,9.18,106.04,3.02,-1.74, -3.46,1.29 </az_corr_coeff> <zen_corr_coeff length=99 encoding="x-csv"> -57.55,-95.56,-4.13,141.69,677.51,-10.41,-7.71,-10.39,0.08,0.43,-0.62, 0.03,-0.36 </zen_corr_coeff> <array_az_ellipse>329.06</array_az_ellipse> <array_za_ellipse>384.005</array_za_ellipse> <array_angle>120</array_angle> </receiver_cfg> <workunit> <workunit_header> <name>11no12aa.16935.59941.140733193388036.10.240.vlar</name> <group_info> <tape_info> <name>11no12aa</name> <start_time>2456243.7219106</start_time> <last_block_time>2456243.7219106</last_block_time> <last_block_done>59941</last_block_done> <missed>0</missed> <tape_quality>0</tape_quality> <beam>1</beam> </tape_info> <name>11no12aa.16935.59941.4.10</name> <data_desc> <start_ra>4.7084258771624</start_ra> <start_dec>25.722075800679</start_dec> <end_ra>4.7084236273757</end_ra> <end_dec>25.722215030445</end_dec> <true_angle_range>0.012500221082135</true_angle_range> <time_recorded>Mon Nov 12 05:19:32 2012</time_recorded> <time_recorded_jd>2456243.7219094</time_recorded_jd> <nsamples>1048576</nsamples> <coords> <coordinate_t> <time>2456243.7219094</time> <ra>4.7084258771624</ra> <dec>25.722075800679</dec> </coordinate_t> <coordinate_t> <time>2456243.7219097</time> <ra>4.7084259071924</ra> <dec>25.722075998447</dec> </coordinate_t> ............. P.S. Notepad do not show the layout OK, use WordPad (lines end with only LF (0A) (Unix style)) Â - ALF - "Find out what you don't do well ..... then don't do it!" :) Â |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
If I had the coordinates I could look it up ... You only get Azimuth & Zenith readings for the AP? The Azimuth is 'upside down' similar to an optical scope? It would be much easier with a RA & Dec as with the MB. I'm not sure how to decipher the az & zen readings given. If you could work that out to simple AZ & ALT from Arecibo I could use that... Where do you obtain a copy of the File? Say, this one; ap_12no12aa_B3_P0_00126_20121217_25009.wu |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
Where do you obtain a copy of the File? Say, this one; ap_12no12aa_B3_P0_00126_20121217_25009.wu If you're quick, you can download it from http://boinc2.ssl.berkeley.edu/sah/download_fanout/194/ap_12no12aa_B3_P0_00126_20121217_25009.wu (files are deleted from disk soon after validation) For how to work out the download url, see my thread WOW! Where on earth did that come from? |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
Where do you obtain a copy of the File? Say, this one; ap_12no12aa_B3_P0_00126_20121217_25009.wu Thanks. The RA & Dec is a little lower in the data. I got; <start> <time>2456243.7641723</time> <ra>6.1291691646237</ra> <dec>18.6518676557</dec> </start> <end> <time>2456243.7643278</time> <ra>6.1291429443197</ra> <dec>18.651741365036</dec> From Arecibo, that would be around 0120 Nov 12th, pointed around AZ 86 degrees & ALT 77 degrees, in Orion. According to Starry Night, there were 2 Pulsars within 4 degrees of that location at that time. PSR0614+2229 & PSR0633+1746 How wide is the Arecibo FOV? |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
I'm still getting these noisy, short AstroPulses. I'm having a hard time getting any at all, but the last two I managed to receive have been; Run time 1,418.59 single pulses: 27 repetitive pulses: 30 percent blanked: 0.00 & Run time 882.86 Found 30 single pulses and 30 repeating pulses, exiting. percent blanked: 2.88 What's up with that? The ones on my other slower machine appear 'normal', Tasks for Computer 6796475 Of course, the slower machine is loaded with tasks whereas I can't seem to receive any on the faster machine... |
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