Observation information
- date-obs: 2026-02-23
- time-obs: 09:30:28.928000000
- date-end: 2026-02-23
- time-end: 11:34:42.911500000
- obs_id: A14_049T01_9000006552
- exposure: 1517.02168167
- sourceid: NGC 1487
- observer: amrutha
- ra_pnt: 58.94208
- dec_pnt: -42.36806
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1A14_049T01_9000006552_56306cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56306cztM0_level2_quad_clean.evt
|
| Size (bytes) | 864,892,800 | 77,846,400 |
| Size | 824.8 MB
| 74.2 MB
|
| Events in quadrant A | 15,390,267 | 147,532 |
| Events in quadrant B | 4,637,921 | 639,289 |
| Events in quadrant C | 6,368,981 | 527,835 |
| Events in quadrant D | 5,093,778 | 570,538 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 138 | 0 |
| B | 0 | 138 | 0 |
| C | 0 | 138 | 0 |
| D | 0 | 138 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 7 | 0 |
| B | 0 | 7 | 0 |
| C | 0 | 7 | 0 |
| D | 0 | 7 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 50357 | 1 |
| B | 0 | 18465 | 1 |
| C | 0 | 23742 | 1 |
| D | 0 | 19781 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6765 | 5447 | 80.517369% |
| B | 6765 | 729 | 10.776053% |
| C | 6765 | 1207 | 17.841833% |
| D | 6765 | 386 | 5.705839% |
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 | 7455 | 6766 | 5095 | 5095 | 68.34% | 75.30% |  |
| B | 7455 | 6766 | 262 | 262 | 3.51% | 3.87% |  |
| C | 7455 | 6766 | 975 | 975 | 13.08% | 14.41% |  |
| D | 7455 | 6766 | 278 | 278 | 3.73% | 4.11% |  |
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 | 15 | 32 | 8689416 | 79976.73 | 430 | 420 | 108.6 |
| A | 4 | 95 | 2208662 | 20325.47 | 430 | 420 | 108.6 |
| A | 12 | 115 | 1449043 | 13333.66 | 430 | 420 | 108.6 |
| B | 5 | 172 | 867337 | 5891.98 | 688 | 665 | 147.1 |
| B | 5 | 185 | 576706 | 3916.16 | 688 | 665 | 147.1 |
| B | 5 | 79 | 84432 | 569.48 | 688 | 665 | 147.1 |
| C | 12 | 94 | 3274749 | 18507.0 | 645 | 638 | 176.9 |
| C | 15 | 198 | 163394 | 919.98 | 645 | 638 | 176.9 |
| C | 5 | 250 | 148356 | 834.98 | 645 | 638 | 176.9 |
| D | 2 | 120 | 959076 | 4768.94 | 703 | 671 | 201.0 |
| D | 2 | 249 | 767381 | 3815.08 | 703 | 671 | 201.0 |
| D | 6 | 239 | 247034 | 1225.88 | 703 | 671 | 201.0 |
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 |  |