Observation information
- date-obs: 2025-04-03
- time-obs: 22:59:09.630800000
- date-end: 2025-04-04
- time-end: 01:15:44.605800000
- obs_id: A13_090T01_9000006458
- exposure: 6001.76673836
- sourceid: 4U 1755-338
- observer: arbind2196
- ra_pnt: 269.6667
- dec_pnt: -33.8075
Basic statistics of files
Param |
Original file |
Final file |
Filename | modeM0/AS1A13_090T01_9000006458_51471cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51471cztM0_level2_quad_clean.evt
|
Size (bytes) | 800,953,920 | 108,388,800 |
Size | 763.8 MB
| 103.4 MB
|
Events in quadrant A | 6,433,586 | 728,939 |
Events in quadrant B | 6,106,255 | 742,954 |
Events in quadrant C | 4,407,076 | 735,034 |
Events in quadrant D | 12,067,205 | 505,071 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 24965 | 0 |
B | 0 | 23792 | 0 |
C | 0 | 19141 | 0 |
D | 0 | 41554 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 164 | 0 |
B | 0 | 164 | 0 |
C | 0 | 164 | 0 |
D | 0 | 164 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 8195 | 578 | 7.053081% |
B | 8194 | 987 | 12.045399% |
C | 8195 | 165 | 2.013423% |
D | 8195 | 2611 | 31.860891% |
Noise dominated fraction
Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.
Quadrant |
# 1 sec bins |
Bins with >0 counts |
Bins with >2000 counts |
High rate bins dominated by noise |
Noise dominated (total time) |
Noise dominated (detector-on time) |
Marked lightcurve |
A | 8195 | 8195 | 313 | 313 | 3.82% | 3.82% |  |
B | 8194 | 8194 | 351 | 351 | 4.28% | 4.28% |  |
C | 8195 | 8195 | 119 | 119 | 1.45% | 1.45% |  |
D | 8195 | 8195 | 2260 | 2260 | 27.58% | 27.58% |  |
Top noisy pixels
Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1
Pixel properties |
Quadrant properties |
Quadrant |
DetID |
PixID |
Counts |
Sigma |
Mean |
Median |
Sigma |
A | 12 | 250 | 1940452 | 9252.02 | 860 | 838 | 209.6 |
A | 12 | 3 | 362243 | 1723.91 | 860 | 838 | 209.6 |
A | 8 | 249 | 203727 | 967.79 | 860 | 838 | 209.6 |
B | 12 | 32 | 1317508 | 7319.53 | 835 | 806 | 179.9 |
B | 8 | 234 | 311847 | 1729.07 | 835 | 806 | 179.9 |
B | 4 | 206 | 304700 | 1689.34 | 835 | 806 | 179.9 |
C | 13 | 3 | 625509 | 2617.74 | 865 | 860 | 238.6 |
C | 15 | 205 | 94997 | 394.5 | 865 | 860 | 238.6 |
C | 15 | 219 | 72260 | 299.22 | 865 | 860 | 238.6 |
D | 8 | 176 | 8016739 | 38769.19 | 736 | 712 | 206.8 |
D | 3 | 12 | 299646 | 1445.78 | 736 | 712 | 206.8 |
D | 2 | 249 | 136490 | 656.68 | 736 | 712 | 206.8 |
Detector plane histogram (DPH)
Histogram calculated using DETX and DETY for each event in the final _common_clean file
Quadrant A |
 |
 |
Quadrant B |
Quadrant D |
 |
 |
Quadrant C |
Count rate plots and images
Plot type |
Count rate plots |
Images |
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data. |
 |
 |
Quadrant-wise count rates
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins |
 |
 |
Housekeeping plots
Parameter |
Plot |
CZT HV Monitor |  |
D_VDD |  |
Temperature 1 |  |
Veto HV Monitor |  |
Veto LLD |  |
Alpha Counter |  |
_CPM_Rate |  |
CZT Counter |  |
+2.5 Volts monitor |  |
+5 Volts monitor |  |
_ROLL_ROT |  |
_Roll_DEC |  |
_Roll_RA |  |
Veto Counter |  |