| | 1 | == DVO Release Notes from 2011.02.10 == |
| | 2 | |
| | 3 | The 3pi database fixes have finished and the rsync server has been |
| | 4 | turned back on! Please feel free to restart your rsync jobs. |
| | 5 | |
| | 6 | As a reminder, rsync will be smart enough to restart where it left |
| | 7 | off, and it should figure out the changes to the southern areas. if |
| | 8 | you are cautious, you could remove the s2230, s3000, and s3730 |
| | 9 | directories before restarting to ensure you get fresh copies. |
| | 10 | |
| | 11 | Some notes on what this database contains: |
| | 12 | |
| | 13 | * all 3pi data taken since the start of demo month (2010/2/12) through last week (2011/2/1). |
| | 14 | * 2MASS detections matched to all objects |
| | 15 | * average fields for grizy and JHK (eg, avextract g i J K would work) |
| | 16 | * zero point calibrations for the PS1 data come from the synthetic photometry database. |
| | 17 | * astrometric calibration is the default in-line calibration relative to the 2MASS frame |
| | 18 | * average magnitudes use a weighted mean, and skip detections that have PSF_QF < 0.85 (excessively masked objects). there is no iterative clipping, however. |
| | 19 | |
| | 20 | In addition, there are 4 bit flags available in the average table for |
| | 21 | each object to give a hint at quality and extendedness: |
| | 22 | |
| | 23 | * for all PS1 detections, the detection is considered 'extended' if (mag_psf - mag_ap > 0.5) |
| | 24 | * if the number of 'extended detections' exceeds the number of 'psf-like' detections, the object is flagged as "PS1 extended" (objflag & 0x01000000) |
| | 25 | * if any of the detections have PSF_QF > 0.85, then the object is considered "PS1 good" (objflag & 0x04000000) |
| | 26 | * similarly, if the 2MASS J-band flags indicate the source is extended, the object is considered "2MASS extended" (objflag & 0x02000000) |
| | 27 | * if the 2MASS J-band detection is significant (**), the source is considered "2MASS good" (objflag & 0x08000000) |
| | 28 | |
| | 29 | note: A significant 2MASS source means their field ph_qual is one of the |
| | 30 | 3 classes A, B, or C, which means the source is > 5 sigma and has some |
| | 31 | quality limits. For more info, and s |
| | 32 | |
| | 33 | Remember that the 2MASS detections maintain a lot of the 2MASS |
| | 34 | metadata for each detection. The summary of how that is represented |
| | 35 | in DVO is here: [wiki:2MASS_info_in_DVO] |
