Another useful feature is the ability to MERGE RDF files. This can be useful for combining the same region of the sky as viewed in different pointings. Section 5 below explains how the selection criteria is applied when merging files.
The new format contains the exposure history information in its own table and a user can insert his own code into QUICKLOOK to make use of it if he/she desires.
********** Choose A Function: **********
cg.) Toggle Celestial or Galactic Coords
de.) Display Event information for specified events.
fh.) Display/Comment FITS file header.
hp.) Histogram a (specified) parameter.
mg.) Merge two FITS files.
op.) Select a new FITS file.
ph.) Pulsar Histogram.
cm.) Contour Map of events.
fm.) FITS Map of events.
sm.) Scatter Map of events.
ss.) Specify Selection of events.
ws.) Write FITS file of selected events.
v.) Toggle verbose menus.
q.) Quit !
? - This Menu
****************************************
quicklook>
Sample display:
Begin displaying events...
### Event Number: 1 ###
TJDAY,MSEC,MICROSEC: 8866 23078770 15 1992/ 9/ 1 (DOY:245) 6:24:38
S/C COORD.X,Y,Z(KM): 2488.8-5475.9 3076.9 |11..X.14|11....14|
B & C TILE TAGS: 131088---------------|B .... |C .X.. |
COINC.DIR/TYPEMODE: 1148 | .... | .... |
PACKET ERROR FLAGS: 128 |41....44|41....44|
TASC #1, #2 FLAGS: 4 4
EVT SPKCHBR X-Z,Y-Z: 0.0 0.1 RAD -0.9 3.0 DEG
- EARTH ZEN., AZI.: 1.8 0.7 RAD 102.3 37.5 DEG
- J2000 R.A., DEC.: 1.2 0.6 RAD 66.8 36.4 DEG
- GAL LAT,LONG.: -0.2 2.9 RAD -8.7 164.1 DEG
EVENT ENERGY (MEV): 80.6 +- 12.9
SSB TIME CORRECTN. : -0.2324765633D+00
BIN. PHS,PULSAR PHS: 0.00000E+00 0.00000E+00
PULSAR R.A., DEC.: 0.12020E+01 0.59027E+00
SSB XYZ (LT-MICSEC): 471830315 -162579181 -70514243
PROC. RETURN CODES : STRUCTURE ANALYSIS: 6 SINGLE: 192 SAGE: 0
EVT STRUCT FLG 1 & 2 : 0 0
SCATR, ENERGY, DIRCTN : 80 0 0
<cr>.) Next event.
p.) Previous event.
m.) Main menu.
s.) To enter a specific event number.
v.) Toggle verbose menus.
? - This menu.
quicklook>
In the event displayed above the fields can be interpreted as follows:
TJDAY Julian day - 2440000.5
MSEC Milliseconds between beginning of the TJDAY
MICROSEC
MICROSEC microseconds since MSEC
S/C COORD J2000 Earth centered X at RA=0
B&C Tile Tag X indicates energy deposition in triggering
sub-telescopes
The other parameters are described by Mattox.
quicklook>ss
Selection modification menu:
Event selection for file:
/h/home/ruggiero/egret/smdb/1s.fits
1. Accept events between TJDs: 8391.7215278 8406.7854167
2. Acceptance energy between: 0.0000000E+00 99999.00
3. Acceptance in a cone centered at (L,B): 190.9203 -4.740065
4. Cone radius: 30.00000
5. Earth zenith selection angle between: 0.0000000E+00 & 180.0000
6. Energy return code selection: 0
7. 6 MeV deposition required: F
Return to Main menu: <cr> or Adjust selection: <n>,
ws - Write selected events to a new file.
q - Quit the program.
v - Toggle verbose menus or the quicklook> prompt.
? - Display this menu.
| Selection | Description | Keywords |
|---|---|---|
| Date | Beginning and ending date of the selection. | TJDBEG,TJDEND |
| Energy | Minimum and maximum energies (in MeV). | MINENG,MAXENG |
| Field of Selection | Field of selection center in both celestial (RA,DEC) and galactic (L,B) coordinates, and the corresponding radius of the selection. | FOS_L,FOS_B,FOS_RA, FOS_DEC,RADIUS |
| Earth Zenith Angle | The angle b/w the Earth and the z-axis of GRO. Accept all events less than ZENMAX. | ZENMAX |
| Energy Class | The energy classification code could be ALL for all events or or Class A (i.e., best events). | ENCLASS |
| 6 MeV deposition in TASC | If 6 MeV deposited in either TASC PHA. | TASC |
| Selection Type | Restrictions |
|---|---|
| Date | New selection should reside within the original. |
| Energy | New energy range must reside within original selection. |
| Field of Selection | FOS must reside completely within original selection. |
| Radius | Part of the FOS selection. |
| Earth Zenith Angle | If a sigma level was originally chosen then the new level must be greater than the original. If a min and max value was used then the new selection must reside within the first. At the present time these two types can't be mixed. |
| Energy Class | This selection can only be changed if the original was 'ALL'. |
| Tasc | This selection can only be changed if original was 'F'. |
| Selection Type | Restrictions |
|---|---|
| Date | The original selection will be the earliest photon arrival time and the last photon arrival time, but may contain gaps in between when separate nonconsecutive viewing periods are merged into a single file. The TJDBEG and TJDEND sequence of keywords tell all about time intervals of original selections. |
| Energy | Same as Section 4.1. |
| Field of Selection | Same as Section 4.1. |
| Radius | Same as Section 4.1. |
| Energy Class | Same as Section 4.1. |
| Tasc | Same as Section 4.1. |
As in the case of SELECT files caution must be taken when merging different files, there will be six possiblilities for creating MERGE files, and each is discussed below.
Merge Type
RDF + RDF
RDF + SELECT
RDF + MERGE
SELECT + SELECT
SELECT + MERGE
MERGE + MERGE
Special Notes
If no selection criteria, then all events are merged into one file and the
appropriate keywords are added (see Appendix C)
The selection criteria from the SELECT file is at first applied to the
origianl. Any subsequent modifications must conform to the Selection
rules in section 4.1 above.
The selection criteria from both datasets are tested and the intersection
of the criteria is applied to the events.
Example:
2 SELECT files are to be merged.
File 1 has been selected with energy range 100 to 300 Mev, TASC = true, Field
of Selection
(J2000 RA,DEC) 301¯ ,36¯ with a 5¯ radius.
File 2 has been selected with Field of Selection (J2000 RA,DEC) 301¯
,36¯ with a 5¯ radius.
The output dataset contains events in the energy range 100 to 300 Mev, TASC =
true, and
FOS 10 wide centered at RA 301 , Dec = 36 .
SIMPLE = T / Written by IDL: 18-Apr-1994 12:33:38.00 BITPIX = 8 / Not used NAXIS = 0 / No primary data included EXTEND = T / Extensions are included COMMENT End of required structural keywords. COMMENT ****************************************************** COMMENT This FITS file contains an EGRET photon list and COMMENT optionally an extension containing information about COMMENT temporal changes in satellite status. The photon data COMMENT are essentially as described in Mattox, et al., The COMMENT EGRET data products, in The Compton observatory Science COMMENT Workshop, NASA Conference publication 3137, 1992, p126. COMMENT Time columns have been combined to a single COMMENT column giving the time in seconds since MJD 40000 COMMENT ****************************************************** COMMENT *** Observation description keywords *** COMMENT *** Instrument configuration keywords TELESCOP= 'GRO ' / Observatory/satellite used INSTRUME= 'EGRET ' / Instrument OBSERVER= 'FICHTEL ' / PI associated with observation OBS_MODE= 'POINTING' / Standard observation mode COMMENT *** Target/observation identification keywords GROVPN = '1.0 ' / GRO Viewing period number EGRETVPN= '0010 ' / EGRET Viewing period number COMMENT *** Timing keywords DATE-OBS= '16/05/91' / Date of observation start: dd/mm/yy TIME-OBS= '17:19:00.000' / Time of observation start: hh:mm:ss.fff DATE-END= '30/05/91' / Date of observation end: dd/mm/yy TIME-END= '18:51:00.000' / Time of observation end: hh:mm:ss.fff STRT_DAY= 1991.136 / Year.ddd of start of obs STRT_TIM= 62340.000 / Seconds of day of start of obs. END_DAY = 1991.150 / Year.ddd of end of obs END_TIM = 67860.000 / Seconds of day of end of obs. ONTIME = 1236000.0 / Total of time in all modes (s) TIMESYS = 'TJD ' / Timesystem for following keywords TIMEUNIT= 'd ' / Units of following keywords. TIMEZERO= 0 / Offset of times from TJD 0 (days) TSTART = 8392.7215 / Truncated JD of start of obs TSTOP = 8406.7854 / Truncated JD of end of obs TIMEDEL = 1.1574074e-11 / Smallest time increment possible (days) TASSIGN = 'SATELLITE' / Times use satellite clock CLOCKAPP= F / No correction to spacecraft time COMMENT NOTE that the spacecraft clock is periodically adjusted from COMMENT from the ground so that no clock correction should be necessary COMMENT *** Positional keywords EQUINOX = 2000.00 / Equinox of coordinate system RA_SCZ = 88.0740 / Spacecraft Z axis DEC_SCZ = 17.1420 / RA_SCX = 339.11900 / Spacecraft X axis DEC_SCX = 46.4810 / GLON_SCZ= 190.92000 / Spacecraft Z axis GLAT_SCZ= -4.74000 / GLON_SCX= 100.05600 / Spacecraft X axis GLAT_SCX= -10.309000 / RA_PNT = 88.0740 / RA of center of FOV DEC_PNT = 17.1420 / Dec of center of FOV GLON_PNT= 190.92000 / L of center of FOV GLAT_PNT= -4.74000 / B of center of FOB RADIUS = 40.0000 / Nominal radius of FOV in degrees. COMMENT *** Processing keywords FILETYPE= 'EGRET_RDF' / Type of file HDUCLAS = 'OGIP ' / Institution defining standard COMMENT Following parameters set during generation of EGRET SDB E_MIN = 20 / Minimum energy of photons included E_MAX = 99999.000 / Maximum energy of photons included EUNIT = 'MeV ' / Units of energy keywords MINENG = 20 / Repeat E_MIN for EGRET software MAXENG = 99999.000 / Repeat E_MAX for EGRET software ZENMAX = 105.000 / Maximum zenith angle in degrees ORIGIN = 'GSFC/COSSC' /Creator of this file COMMENT This data is derived from EGRET SDB data delivered COMMENT to the COSSC archive which was processed by the COSSC COMMENT SDB2FITS program COMMENT CREATOR = 'EGRETCNV v1.1' / IDL EGRETCNV.PRO program NEVENT = 36606 / Number of events in event list
SIMPLE = T / Written by IDL: 18-Apr-1994 12:33:38.00 BITPIX = 8 / Not used NAXIS = 0 / No primary data included EXTEND = T / Extensions are included COMMENT End of required structural keywords. COMMENT ****************************************************** COMMENT This FITS file contains an EGRET photon list and COMMENT optionally an extension containing information about COMMENT temporal changes in satellite status. The photon data COMMENT are essentially as described in Mattox, et al., The COMMENT EGRET data products, in The Compton observatory Science COMMENT Workshop, NASA Conference publication 3137, 1992, p126. COMMENT Time columns have been combined to a single COMMENT column giving the time in seconds since MJD 40000 COMMENT ****************************************************** COMMENT *** Observation description keywords *** COMMENT *** Instrument configuration keywords TELESCOP= 'GRO ' / Observatory/satellite used INSTRUME= 'EGRET ' / Instrument OBSERVER= 'FICHTEL ' / PI associated with observation OBS_MODE= 'POINTING' / Standard observation mode COMMENT *** Target/observation identification keywords GROVPN = '1.0 ' / GRO Viewing period number EGRETVPN= '0010 ' / EGRET Viewing period number COMMENT *** Timing keywords DATE-OBS= '16/05/91' / Date of observation start: dd/mm/yy TIME-OBS= '17:19:00.000' / Time of observation start: hh:mm:ss.fff DATE-END= '30/05/91' / Date of observation end: dd/mm/yy TIME-END= '18:51:00.000' / Time of observation end: hh:mm:ss.fff STRT_DAY= 1991.135 / Year.ddd of start of obs STRT_TIM= 62000.000 / Seconds of day of start of obs. END_DAY = 1991.150 / Year.ddd of end of obs END_TIM = 67000.000 / Seconds of day of end of obs. ONTIME = 1236000.0 / Total of time in all modes (s) TIMESYS = 'TJD ' / Timesystem for following keywords TIMEUNIT= 'd ' / Units of following keywords. TIMEZERO= 0 / Offset of times from TJD 0 (days) TSTART = 8392.7215 / Truncated JD of start of obs TSTOP = 8406.7854 / Truncated JD of end of obs TIMEDEL = 1.1574074e-11 / Smallest time increment possible (days) TASSIGN = 'SATELLITE' / Times use satellite clock CLOCKAPP= F / No correction to spacecraft time COMMENT NOTE that the spacecraft clock is periodically adjusted from COMMENT from the ground so that no clock correction should be necessary COMMENT *** Positional keywords EQUINOX = 2000.00 / Equinox of coordinate system RA_SCZ = 88.0740 / Spacecraft Z axis DEC_SCZ = 17.1420 / RA_SCX = 339.11900 / Spacecraft X axis DEC_SCX = 46.4810 / GLON_SCZ= 190.92000 / Spacecraft Z axis GLAT_SCZ= -4.74000 / GLON_SCX= 100.05600 / Spacecraft X axis GLAT_SCX= -10.309000 / RA_PNT = 88.0740 / RA of center of FOV DEC_PNT = 17.1420 / Dec of center of FOV GLON_PNT= 190.92000 / L of center of FOV GLAT_PNT= -4.74000 / B of center of FOB RADIUS = 40.000 / Nominal radius of FOV in degrees. COMMENT *** Processing keywords FILETYPE= 'EGRET_SELECT_RDF' / Type of file HDUCLAS = 'OGIP ' / Institution defining standard COMMENT Following parameters set during generation of EGRET SDB E_MIN = 20 / Minimum energy of photons included E_MAX = 99999.000 / Maximum energy of photons included EUNIT = 'MeV ' / Units of energy keywords MINENG = 100.0 / Repeat E_MIN for EGRET software MAXENG = 1000.0 / Repeat E_MAX for EGRET software ZENMAX = 105.000 / Maximum zenith angle in degrees ORIGIN = 'GSFC/COSSC' /Creator of this file COMMENT This data is derived from EGRET SDB data delivered COMMENT to the COSSC archive which was processed by the COSSC COMMENT SDB2FITS program COMMENT CREATOR = 'Quicklook 4.0' / Program that wrote this file. NEVENT = 36606 / Number of events in event list DATE = '21/04/94' / FITS file creation date (dd/mm/yy) CRITER1 = 'ENERGY ' / Criteria for selection of datasets CRITER2 = 'TASC ' / Criteria for selection of datasets TJDBEG1 = 8391.7215278 / Modified Julian date for begin time of selectio
TJDEND1 = 8406.7854167 / Modified Julian date for end time of selection.
ZENMAX = 180.0000000 / Maximum zenith anlge for this selection. TASC = T / TASC im coincidence (6.5 MeV deposited in TASC)
ENCLAS = 'ALL ' / Energy return code (see EGRET DOCs) FOS_RA = 88.0739975 / J2000 Right Ascencion of Field of Selection. FOS_DEC = 17.1420002 / J2000 Declination of Field of Selection. FOS_L = 190.9203491 / Galactic Longitude of Field of Selection. FOS_B = -4.7400746 / Galactic Lattitude of Field of Selection.
SIMPLE = T / Written by IDL: 18-Apr-1994 12:33:38.00 BITPIX = 8 / Not used NAXIS = 0 / No primary data included EXTEND = T / Extensions are included ORIGIN = 'GSFC/COSSC' /Creator of this file STRT_DAY= 1991.112 / Program that wrote this file. STRT_TIM= 76000.000 / Program that wrote this file. END_DAY = 1991.150 / Program that wrote this file. END_TIM = 67000.000 / Program that wrote this file. TELESCOP= 'GRO ' / Observatory/satellite used OBSERVER= 'FICHTEL ' / PI associated with observation EQUINOX = 2000.00 / Equinox of coordinate system RADIUS = 10.000 / Program that wrote this file. MINENG = 20.0 / Program that wrote this file. MAXENG = 99999.0 / Program that wrote this file. GROVPN = '1.0 ' / GRO Viewing period number ZENMAX = 105.0000000 / Maximum zenith angle in degrees CREATOR = 'Quicklook 4.0' / Program that wrote this file. HDUCLAS = 'OGIP ' / Institution defining standard TIMESYS = 'TJD ' / Timesystem for following keywords TIMEUNIT= 'd ' / Units of following keywords. TIMEZERO= 0 / Offset of times from TJD 0 (days) TIMEDEL = 1.1574074e-11 / Smallest time increment possible (days) TASSIGN = 'SATELLITE' / Times use satellite clock CLOCKAPP= F / No correction to spacecraft time TASC = T / TASC im coincidence (6.5 MeV deposited in TASC) ENCLAS = 'ALL ' / Energy return code (see EGRET DOCs) FOS_RA = 84.6022491 / J2000 Right Ascencion of Field of Selection. FOS_DEC = 22.0590172 / J2000 Declination of Field of Selection. FOS_L = 185.0000000 / Galactic Longitude of Field of Selection. FOS_B = -5.0000000 / Galactic Lattitude of Field of Selection. FILETYPE= 'EGRET_MERGE_RDF' / Criteria for selection of datasets& COMMENT End of required structural keywords. COMMENT ****************************************************** COMMENT This FITS file contains an EGRET photon list and COMMENT optionally an extension containing information about COMMENT temporal changes in satellite status. The photon data COMMENT are essentially as described in Mattox, et al., The COMMENT EGRET data products, in The Compton observatory Science COMMENT Workshop, NASA Conference publication 3137, 1992, p126. COMMENT Time columns have been combined to a single COMMENT column giving the time in seconds since MJD 40000 COMMENT ****************************************************** COMMENT *** Observation description keywords *** COMMENT *** Instrument configuration keywords COMMENT *** Target/observation identification keywords COMMENT *** Timing keywords COMMENT NOTE that the spacecraft clock is periodically adjusted from COMMENT from the ground so that no clock correction should be necessary COMMENT *** Positional keywords COMMENT *** Processing keywords COMMENT Following parameters set during generation of EGRET SDB COMMENT This data is derived from EGRET SDB data delivered COMMENT to the COSSC archive which was processed by the COSSC COMMENT SDB2FITS program COMMENT TJDBEG1 = 8391.7215278 / Truncated Julian date for begin time of selecti TJDEND1 = 8406.7854167 / Truncated Julian date for end time of selection COMMENT End of required structural keywords. COMMENT ****************************************************** COMMENT This FITS file contains an EGRET photon list and COMMENT optionally an extension containing information about COMMENT temporal changes in satellite status. The photon data COMMENT are essentially as described in Mattox, et al., The COMMENT EGRET data products, in The Compton observatory Science COMMENT Workshop, NASA Conference publication 3137, 1992, p126. COMMENT Time columns have been combined to a single COMMENT column giving the time in seconds since MJD 40000 COMMENT ****************************************************** COMMENT *** Observation description keywords *** COMMENT *** Instrument configuration keywords COMMENT *** Target/observation identification keywords COMMENT *** Timing keywords COMMENT NOTE that the spacecraft clock is periodically adjusted from COMMENT from the ground so that no clock correction should be necessary COMMENT *** Positional keywords COMMENT *** Processing keywords COMMENT Following parameters set during generation of EGRET SDB COMMENT This data is derived from EGRET SDB data delivered COMMENT to the COSSC archive which was processed by the COSSC COMMENT SDB2FITS program COMMENT DATE = '25/04/94' / FITS file creation date (dd/mm/yy) HISTORY Data merged by program QLOOK v. 4.0 on 25-APR-94 HISTORY Merged FILETYPE 1: EGRET_SELECT_RDF HISTORY Merged FILETYPE 2: EGRET_RDF
XTENSION= 'BINTABLE' / Standard binary table BITPIX = 8 / Required value NAXIS = 2 / Required value NAXIS1 = 122 / Number of bytes in row NAXIS2 = 36606 / Number of rows in table PCOUNT = 0 / No group parameters -- Required value GCOUNT = 1 / One group of data -- Required value TFIELDS = 37 / Number of fields (columns) in table COMMENT End of required structural keywords EXTNAME = 'EVENT ' /EGRET events list in RDF style format COMMENT ****************************************************** COMMENT This FITS file contains an EGRET photon list and COMMENT optionally an extension containing information about COMMENT temporal changes in satellite status. The photon data COMMENT are essentially as described in Mattox, et al., The COMMENT EGRET data products, in The Compton observatory Science COMMENT Workshop, NASA Conference publication 3137, 1992, p126. COMMENT Time columns have been combined to a single COMMENT column giving the time in seconds since MJD 40000 COMMENT ****************************************************** COMMENT *** Observation description keywords *** COMMENT *** Instrument configuration keywords TELESCOP= 'GRO ' / Observatory/satellite used INSTRUME= 'EGRET ' / Instrument OBSERVER= 'FICHTEL ' / PI associated with observation OBS_MODE= 'POINTING' / Standard observation mode COMMENT *** Target/observation identification keywords GROVPN = '1.0 ' / GRO Viewing period number EGRETVPN= '0010 ' / EGRET Viewing period number COMMENT *** Timing keywords DATE-OBS= '16/05/91' / Date of observation start: dd/mm/yy TIME-OBS= '17:19:00.000' / Time of observation start: hh:mm:ss.fff DATE-END= '30/05/91' / Date of observation end: dd/mm/yy TIME-END= '18:51:00.000' / Time of observation end: hh:mm:ss.fff STRT_DAY= 1991.136 / Year.ddd of start of obs STRT_TIM= 62340.000 / Seconds of day of start of obs. END_DAY = 1991.150 / Year.ddd of end of obs END_TIM = 67860.000 / Seconds of day of end of obs. ONTIME = 1236000.0 / Total of time in all modes (s) TIMESYS = 'TJD ' / Timesystem for following keywords TIMEUNIT= 'd ' / Units of following keywords. TIMEZERO= 0 / Offset of times from TJD 0 (days) TSTART = 8392.7215 / Truncated JD of start of obs TSTOP = 8406.7854 / Truncated JD of end of obs TIMEDEL = 1.1574074e-11 / Smallest time increment possible (days) TASSIGN = 'SATELLITE' / Times use satellite clock CLOCKAPP= F / No correction to spacecraft time COMMENT NOTE that the spacecraft clock is periodically adjusted from COMMENT from the ground so that no clock correction should be necessary COMMENT *** Positional keywords EQUINOX = 2000.00 / Equinox of coordinate system RA_SCZ = 88.0740 / Spacecraft Z axis DEC_SCZ = 17.1420 / RA_SCX = 339.11900 / Spacecraft X axis DEC_SCX = 46.4810 / GLON_SCZ= 190.92000 / Spacecraft Z axis GLAT_SCZ= -4.74000 / GLON_SCX= 100.05600 / Spacecraft X axis GLAT_SCX= -10.309000 / RA_PNT = 88.0740 / RA of center of FOV DEC_PNT = 17.1420 / Dec of center of FOV GLON_PNT= 190.92000 / L of center of FOV GLAT_PNT= -4.74000 / B of center of FOB RADIUS = 40.0000 / Nominal radius of FOV in degrees. COMMENT *** Processing keywords FILETYPE= 'EGRET_RDF' / Type of file FILENAME= 'photon.fit' / Input file data derived from HDUCLAS = 'OGIP ' / Institution defining standard HDUCLAS1= 'EVENTS ' / Basis class of data COMMENT Following parameters set during generation of EGRET SDB E_MIN = 20 / Minimum energy of photons included E_MAX = 99999.000 / Maximum energy of photons included EUNIT = 'MeV ' / Units of energy keywords MINENG = 20 / Repeat E_MIN for EGRET software MAXENG = 99999.000 / Repeat E_MAX for EGRET software ZENMAX = 105.000 / Maximum zenith angle in degrees ORIGIN = 'GSFC/COSSC' /Creator of this file COMMENT This data is derived from EGRET SDB data delivered COMMENT to the COSSC archive which was processed by the COSSC COMMENT SDB2FITS program COMMENT CREATOR = 'EGRETCNV v1.1' / IDL EGRETCNV.PRO program NEVENT = 36606 / Number of events in event list COMMENT *** Column names TTYPE1 = 'TIME ' / TTYPE2 = 'X ' / X and Y are duplicates of RA and DEC TTYPE3 = 'Y ' / All angles are in degrees TTYPE4 = 'ENERGY ' / TTYPE5 = 'ENERGY_ERROR' / One sigma uncertainty in error TTYPE6 = 'RA ' / TTYPE7 = 'DEC ' / TTYPE8 = 'L ' / TTYPE9 = 'B ' / TTYPE10 = 'XZ_ANGLE' / TTYPE11 = 'YZ_ANGLE' / TTYPE12 = 'AZIMUTH ' / TTYPE13 = 'ZEN_ANGLE' / Angle from Earth zenith TTYPE14 = 'X_INERTIAL' / X,Y,Z relative to earth (km). TTYPE15 = 'Y_INERTIAL' / TTYPE16 = 'Z_INERTIAL' / TTYPE17 = 'TASC_FLAG_1' / Instrument configuration codes TTYPE18 = 'TASC_2_FLAGS' / TTYPE19 = 'B_C_TAGS' / TTYPE20 = 'COINCIDENCE_MOD' / TTYPE21 = 'PACK_ERROR_FLAG' / TTYPE22 = 'BARYTIME_CORRECTION' / Barycenter time correction for TTYPE23 = 'BARY_PHASE' / pulsar at assumed location TTYPE24 = 'RA_PULSAR' / RA,DEC assumed for pulsar TTYPE25 = 'DEC_PULSAR' / Columns 22-26 may not be filled TTYPE26 = 'PHASE_PULSAR' / TTYPE27 = 'XBARYCEN' / XYZ in lightseconds from solar barycenter TTYPE28 = 'YBARYCEN' / TTYPE29 = 'ZBARYCEN' / TTYPE30 = 'STR_ANAL_WORD' / TTYPE31 = 'RC_SINGLE' / Return codes from EGRET team software TTYPE32 = 'RC_SAGE ' / TTYPE33 = 'RC_SFLAGS_1' / TTYPE34 = 'RC_SFLAGS_2' / TTYPE35 = 'RC_SCATR' / TTYPE36 = 'RC_ENERGY' / TTYPE37 = 'RC_DIRCTN' / COMMENT COMMENT *** Column formats COMMENT TFORM1 = 'D ' / TFORM2 = 'E ' / TFORM3 = 'E ' / TFORM4 = 'E ' / TFORM5 = 'E ' / TFORM6 = 'E ' / TFORM7 = 'E ' / TFORM8 = 'E ' / TFORM9 = 'E ' / TFORM10 = 'E ' / TFORM11 = 'E ' / TFORM12 = 'E ' / TFORM13 = 'E ' / TFORM14 = 'E ' / TFORM15 = 'E ' / TFORM16 = 'E ' / TFORM17 = 'B ' / TFORM18 = 'B ' / TFORM19 = 'J ' / TFORM20 = 'I ' / TFORM21 = '2B ' / TFORM22 = 'D ' / TFORM23 = 'E ' / TFORM24 = 'E ' / TFORM25 = 'E ' / TFORM26 = 'E ' / TFORM27 = 'J ' / TFORM28 = 'J ' / TFORM29 = 'J ' / TFORM30 = 'B ' / TFORM31 = 'B ' / TFORM32 = 'B ' / TFORM33 = 'B ' / TFORM34 = 'B ' / TFORM35 = 'B ' / TFORM36 = 'B ' / TFORM37 = 'B ' / COMMENT *** Units for columns TUNIT1 = 's ' / Seconds TUNIT2 = 'deg ' / Degrees TUNIT3 = 'deg ' / Degrees TUNIT4 = 'MeV ' / TUNIT5 = 'MeV ' / TUNIT6 = 'deg ' / Degrees TUNIT7 = 'deg ' / Degrees TUNIT8 = 'deg ' / Degrees TUNIT9 = 'deg ' / Degrees TUNIT10 = 'deg ' / Degrees TUNIT11 = 'deg ' / Degrees TUNIT12 = 'deg ' / Degrees TUNIT13 = 'deg ' / Degrees TUNIT14 = 'km ' / Kilometers from earth center TUNIT15 = 'km ' / Kilometers from earth center TUNIT16 = 'km ' / Kilometers from earth center TUNIT22 = 's ' /Seconds TUNIT24 = 'deg ' / Degrees TUNIT25 = 'deg ' / Degrees TUNIT27 = 'km ' / Distance from Solar System barycenter TUNIT28 = 'km ' / Unscaled values are in lightmicroseconds TUNIT29 = 'km ' / (TSCALnn = speed of light) TSCAL27 = 0.2997952000 / Speed of light in km/microseconds TSCAL28 = 0.2997952000 / Speed of light in km/microseconds TSCAL29 = 0.2997952000 / Speed of light in km/microseconds COMMENT *** Following keywords handle coordinate/projection information. COMMENT The following pairs of columns form natural coordinate pairs: COMMENT X,Y RA,DEC GLON,GLAT COMMENT *** Coordinate/projection type information for columns TCTYP2 = 'RA---CAR' / Cartesian (Rectangular) projection TCTYP3 = 'DEC--CAR' / (X and Y are copies of RA and DEC) TCTYP6 = 'RA---CAR' / Cartesian (Rectangular) projection TCTYP7 = 'DEC--CAR' / TCTYP8 = 'GLON-CAR' / Galactic coordinates can also be TCTYP9 = 'GLAT-CAR' / viewed as a Cartesian projection COMMENT *** Coordinate/projection scaling information TCDLT2 = 1.00000 / TCDLT3 = 1.00000 / TCDLT6 = 1.00000 / TCDLT7 = 1.00000 / TCDLT8 = 1.00000 / TCDLT9 = 1.00000 / COMMENT *** Coordinate/projection offsets TCRPX2 = 0.00000 / TCRPX3 = 0.00000 / TCRPX6 = 0.00000 / TCRPX7 = 0.00000 / TCRPX8 = 0.00000 / TCRPX9 = 0.00000 / COMMENT *** Coordinate/projection reference point values TCRVL2 = 0.00000 / TCRVL3 = 0.00000 / TCRVL6 = 0.00000 / TCRVL7 = 0.00000 / TCRVL8 = 0.00000 / TCRVL9 = 0.00000 /
XTENSION= 'BINTABLE' / Standard binary table BITPIX = 8 / Required value NAXIS = 2 / Required value NAXIS1 = 58 / Number of bytes in row NAXIS2 = 3070 / Number of rows in table PCOUNT = 0 / No group parameters -- Required value GCOUNT = 1 / One group of data -- Required value TFIELDS = 19 / Number of fields (columns) in table COMMENT End of required structural keywords EXTNAME = 'TSI ' /Telemetry scalar file (< exposure hist.) COMMENT ****************************************************** COMMENT This FITS file contains an EGRET photon list and COMMENT optionally an extension containing information about COMMENT temporal changes in satellite status. The photon data COMMENT are essentially as described in Mattox, et al., The COMMENT EGRET data products, in The Compton observatory Science COMMENT Workshop, NASA Conference publication 3137, 1992, p126. COMMENT Time columns have been combined to a single COMMENT column giving the time in seconds since MJD 40000 COMMENT ****************************************************** COMMENT *** Observation description keywords *** COMMENT *** Instrument configuration keywords TELESCOP= 'GRO ' / Observatory/satellite used INSTRUME= 'EGRET ' / Instrument OBSERVER= 'FICHTEL ' / PI associated with observation OBS_MODE= 'POINTING' / Standard observation mode COMMENT *** Target/observation identification keywords GROVPN = '1.0 ' / GRO Viewing period number EGRETVPN= '0010 ' / EGRET Viewing period number COMMENT *** Timing keywords DATE-OBS= '16/05/91' / Date of observation start: dd/mm/yy TIME-OBS= '17:19:00.000' / Time of observation start: hh:mm:ss.fff DATE-END= '30/05/91' / Date of observation end: dd/mm/yy TIME-END= '18:51:00.000' / Time of observation end: hh:mm:ss.fff STRT_DAY= 1991.136 / Year.ddd of start of obs STRT_TIM= 62340.000 / Seconds of day of start of obs. END_DAY = 1991.150 / Year.ddd of end of obs END_TIM = 67860.000 / Seconds of day of end of obs. ONTIME = 1236000.0 / Total of time in all modes (s) TIMESYS = 'TJD ' / Timesystem for following keywords TIMEUNIT= 'd ' / Units of following keywords. TIMEZERO= 0 / Offset of times from TJD 0 (days) TSTART = 8392.7215 / Truncated JD of start of obs TSTOP = 8406.7854 / Truncated JD of end of obs TIMEDEL = 1.1574074e-08 / Time resolution TASSIGN = 'SATELLITE' / Times use satellite clock CLOCKAPP= F / No correction to spacecraft time COMMENT NOTE that the spacecraft clock is periodically adjusted from COMMENT from the ground so that no clock correction should be necessary COMMENT *** Positional keywords EQUINOX = 2000.00 / Equinox of coordinate system RA_SCZ = 88.0740 / Spacecraft Z axis DEC_SCZ = 17.1420 / RA_SCX = 339.11900 / Spacecraft X axis DEC_SCX = 46.4810 / GLON_SCZ= 190.92000 / Spacecraft Z axis GLAT_SCZ= -4.74000 / GLON_SCX= 100.05600 / Spacecraft X axis GLAT_SCX= -10.309000 / RA_PNT = 88.0740 / RA of center of FOV DEC_PNT = 17.1420 / Dec of center of FOV GLON_PNT= 190.92000 / L of center of FOV GLAT_PNT= -4.74000 / B of center of FOB RADIUS = 40.0000 / Nominal radius of FOV in degrees. COMMENT *** Processing keywords FILETYPE= 'EGRET_RDF' / Type of file FILENAME= 'exphst.fit' / File data derived from HDUCLAS = 'OGIP ' / Institution defining standard HDUCLAS1= 'TSI ' / Telemetry scalar Information COMMENT Following parameters set during generation of EGRET SDB E_MIN = 20 / Minimum energy of photons included E_MAX = 99999.000 / Maximum energy of photons included EUNIT = 'MeV ' / Units of energy keywords MINENG = 20 / Repeat E_MIN for EGRET software MAXENG = 99999.000 / Repeat E_MAX for EGRET software ZENMAX = 105.000 / Maximum zenith angle in degrees ORIGIN = 'GSFC/COSSC' /Creator of this file COMMENT This data is derived from EGRET SDB data delivered COMMENT to the COSSC archive which was processed by the COSSC COMMENT SDB2FITS program COMMENT CREATOR = 'EGRETCNV v1.1' / IDL EGRETCNV.PRO program COMMENT *** Column names TTYPE1 = 'TIME ' / Time of beginning of interval TTYPE2 = 'LIVETIME' / Livetime during interval TTYPE3 = 'T_ELAPSE' / Elapsed time during interval TTYPE4 = 'MODE ' / EGRET exposure mode index TTYPE5 = 'SAA ' / SAA passage interval? TTYPE6 = 'POINT_DEV' / Deviation from pointing > .5 deg?
TTYPE7 = 'HODOSCOP' / EGRET HODOSCOPE code TTYPE8 = 'EXCL_FLAG' / Interval excluded in EGRET timeline? TTYPE9 = 'COINCIDENCE' / Coincidence mode of EGRET TTYPE10 = 'TASC1_DEPOSIT' / TASC1 deposition requirements TTYPE11 = 'TASC2_DEPOSIT' / TASC2 deposition requirements TTYPE12 = 'RA_SCZ ' / RA,DEC of Z (pointing) axis TTYPE13 = 'DEC_SCZ ' / TTYPE14 = 'RA_SCX ' / RA,DEC of X axis TTYPE15 = 'DEC_SCX ' / TTYPE16 = 'RA_EARTH_START' / RA,DEC of Earth at start of interval TTYPE17 = 'DEC_EARTH_START' / TTYPE18 = 'RA_EARTH_END' / RA,DEC of Earth at end of interval TTYPE19 = 'DEC_EARTH_END' / COMMENT COMMENT *** Column formats COMMENT TFORM1 = 'D ' / TFORM2 = 'E ' / TFORM3 = 'E ' / TFORM4 = 'I ' / TFORM5 = 'L ' / TFORM6 = 'L ' / TFORM7 = 'L ' / TFORM8 = 'I ' / TFORM9 = 'B ' / TFORM10 = 'B ' / TFORM11 = 'B ' / TFORM12 = 'E ' / TFORM13 = 'E ' / TFORM14 = 'E ' / TFORM15 = 'E ' / TFORM16 = 'E ' / TFORM17 = 'E ' / TFORM18 = 'E ' / TFORM19 = 'E ' / COMMENT Units of columns TUNIT1 = 's ' / Seconds TUNIT2 = 's ' / Seconds TUNIT3 = 's ' / Seconds TUNIT12 = 'deg ' / Degrees TUNIT13 = 'deg ' / Degrees TUNIT14 = 'deg ' / Degrees TUNIT15 = 'deg ' / Degrees TUNIT16 = 'deg ' / Degrees TUNIT17 = 'deg ' / Degrees TUNIT18 = 'deg ' / Degrees TUNIT19 = 'deg ' / Degrees
SIMPLE = T / file does conform to FITS standard BITPIX = 16 / number of bits per data pixel NAXIS = 2 / number of data axes NAXIS1 = 120 / length of data axis 1 NAXIS2 = 120 / length of data axis 2 COMMENT FITS (Flexible Image Transport System) format defined in Astronomy and COMMENT Astrophysics Supplement Series v44/p363, v44/p371, v73/p359,v73/p365. COMMENT Contact the NASA Science Office of Standards and Technology for the COMMENT FITS Definition document #100 and other FITS information. CRVAL1 = 137.18 / Min coordinate of reference bin (RA, GLON) CRPIX1 = 1.00 / Location of reference point in array CDELT1 = 0.5000 / Interval in degrees CTYPE1 = 'GLON ' / Coordinate type CRVAL2 = -39.18 / Min coordinate of reference bin (DEC, GLAT) CRPIX2 = 1.00 / Location of reference point in array CDELT2 = 0.5000 / Interval in degrees CTYPE2 = 'GLAT ' / Coordinate type BUNIT = 'COUNTS ' / Units of primary array BSCALE = 1.0000000E+00 / Data scaling (none) BZERO = 0.0000000E+00 / Data offset (none) STRT-DAY= 1992.245 / Start time of the file (YYYY.DDD) STRT-TIM= 22022.680 / Start time of the file (seconds of day) END-DAY = 1992.261 / END time of the file (YYYY.DDD) END-TIM = 55055.035 / END time of the file (seconds of day) ZEMMAX1 = 180.000 / Maximum angle from zenith in level xx& MINENG1 = 20.000 / Minimum energy of map (Mev) MAXENG1 = 99999.000 / Maximum energy of map (Mev) TASC = F / Events selected with 6 Mev in TASC DETMAX = 30.000 / Maximum angle from detector axis ORIGIN = 'GSFC/COSSC' / File produced at Compton Science Support Center
CREATOR = 'Quicklook' / File produced by EGRET QUICKLOOK program. TELESCOP= 'GRO ' / Compton Observatory (Gamma Ray Observatory) INSTRUME= 'EGRET ' / The GRO instrument is EGRET FILETYPE= 'QLOOK_MAP' / Simple map produced by QUICKLOOK. MAPTYPE = 'ALL_SKY ' / Quicklook maps are always all_sky. FILENAME= 'qmap.fits' / Original name of this file HISTORY 14925 events selected.