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EUVE Data Issues
EUVE had both imaging and spectroscopic capabilities; we currently only index the spectroscopic data.
There are 1347 rows in obscore.euve.psv (created by filtering on telescope_name=EUVE).
1 row has an instrument field set to 0, the other 1346 have DS/S.
The instrument=0 record has
obs_id euve_j0613-23_9__0011160027N
target_name EUVE J0613-23.9
title euve_j0613-23_9__0011160027N, EUVE J0613-23.9
For now I have manually replaced 0 by DS/S.
There are 17 entries with an empty target_name:
# obs_id title
1 an_uma__0002091517N an_uma__0002091517N,
2 capella_9909080014N capella_9909080014N,
3 ngc_253__9810242059N ngc_253__9810242059N,
4 ngc_4051__9903081019N ngc_4051__9903081019N,
5 ngc_4051__9903090646N ngc_4051__9903090646N,
6 ngc_4051__9903100931N ngc_4051__9903100931N,
7 ngc_4051__9903110908N ngc_4051__9903110908N,
8 ngc_4051__9903120846N ngc_4051__9903120846N,
9 ngc_4051__9903130821N ngc_4051__9903130821N,
10 ngc_4051__9903210646N ngc_4051__9903210646N,
11 ngc_4051__9903220622N ngc_4051__9903220622N,
12 ngc_4051__9903230604N ngc_4051__9903230604N,
13 ngc_4051__9903240400N ngc_4051__9903240400N,
14 ngc_4051__9903242118N ngc_4051__9903242118N,
15 procyon__9911060833N procyon__9911060833N,
16 v711_tau__9909132308N v711_tau__9909132308N,
17 v711_tau__9909181303N v711_tau__9909181303N,
The exposure time may be approximate - given the definition of the exp_time column. However, I think the obscore tables may well be per instrument and so retrieved from the header file itself, in which case it should be okay. Note that capella__9312221257N and capella__9312221257D are both down as 74 ks in the MAST search results (search on Capella as a target) but the obscore values are
capella_9312221257D 94877.546900000001
capella_9312221257N 77654.023400000005
and 94878 s is 1 day, 2 hours, 21 minutes and 18 seconds. So I think we are okay.
Compare the day and night observations of Capella (well, one set of them). They both start at the same time but the "day" one is longer and only contains the DS/S data; the "night" one also contains data from the DS/M and DS/L instruments (at least that's what I expect them to be called).
So we need to deal with multiple datasets per observation for EUVE; both for multiple instruments and for different "views" of the same data, which is what the "day" and "night" observations are.
This is issue #22 (https://github.com/rahuldave/semflow/issues/22) repeated here. It has been reported to Karen and Randy.
The map.euve.txt contains the following 23 obsid values which do not appear in the obscore table:
am_her__9309231757N
psr_j0659_1414__9301302304N
am_her__9808040924N
am_her__9503081219N
capella__9909080014N
capella__9603030211N
xte_j1118__0004130741N
yz_cmi__9302250656N
capella__9402250155N
am_her__9309260306N
xte_j1118__0004162133N
psr_j0437-4715__9401312345N
geminga__9401142123N
xte_j1118__0004080227N
psr_j0437-4715__9410230226N
psr_j0437-4715__9411020527N
euve_j0613-23_9__0011060349N
yy_gem__9502201531N
capella__9212100530N
grb_250392__9308250056N
ngc_1360__9311181847N
gr_burster__9507010521N
yz_cmi__9412210116N
I have a mapping for 19 values (manually created):
% cat AstroExplorer/Missions/MAST/euve/map.euve.txt.rename
# Rename obsid values from map.euve.txt to match obscore.euve.psv
am_her__9309231757N amher_9309231757N
psr_j0659_1414__9301302304N psr_j0659_1414_9301302304N
am_her__9808040924N amher_9808040924N
am_her__9503081219N amher_9503081219N
capella__9909080014N capella_9909080014N
capella__9603030211N capella_9603030211N
yz_cmi__9302250656N yzcmi_9302250656N
capella__9402250155N capella_9402250155N
am_her__9309260306N amher_9309260306N
psr_j0437-4715__9401312345N psr_j0437-4715_9401312345N
geminga__9401142123N geminga_9401142123N
psr_j0437-4715__9410230226N psr_j0437-4715_9410230226N
psr_j0437-4715__9411020527N psr_j0437-4715_9411020527N
capella__9212100530N capella_9212100530N
gr_burster__9507010521N grburster_9507010521N
yz_cmi__9412210116N yzcmi_9412210116N
xte_j1118__0004130741N xte_j1118__0004130741
xte_j1118__0004162133N xte_j1118__0004162133
xte_j1118__0004080227N xte_j1118__0004080227
You can see that it is not a simple replacement or removal of underscore characters, and there are still missing values.
There are multiple occurrences, in obscore.euve.psv of the strings 9812030115N and 9810110517N. It has been reported to Karen and Randy.
This could be valid since we have for 9812030115N
title=2euve_j0841_03_3__9812030115N, RE J0841+03 date=1999-12-16 19:49:17
title=re_j0841_03__9812030115N, RE J0841+03 date=1999-12-16 20:33:06
Doing a MAST search around 08 41 03.60 +03 21 14.0 we find two obsid values:
2euve_j0841_03_3__9812030115N date=1998-12-03 01:15:35 exp=32
2euve_j0841_03_3__9812261307N date=1998-12-26 13:07:26 exp=57
These exp times are in kiloseconds, so the re_j0841_03__9812030115N, RE J0841+03 entry is presumably "garbage".
9810110517N looks to be similar:
2euve_j0356-36_6__9810110517N, 2EUVE_J0356-36.6 date=1999-12-16 19:36:24
euve_j0356-366__9810110517N, EUVE J0356-366 date=1999-12-16 20:23:24
although a search on 2EUVE_J0356-36.6 results in both being found in MAST.