Observation information
- date-obs: 2026-02-21
- time-obs: 16:00:27.266400000
- date-end: 2026-02-21
- time-end: 18:01:02.236800000
- obs_id: A14_049T01_9000006552
- exposure: 4406.61465639
- 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_56280cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56280cztM0_level2_quad_clean.evt
|
| Size (bytes) | 728,648,640 | 93,689,280 |
| Size | 694.9 MB
| 89.3 MB
|
| Events in quadrant A | 12,157,339 | 410,218 |
| Events in quadrant B | 3,866,048 | 712,823 |
| Events in quadrant C | 4,386,076 | 632,768 |
| Events in quadrant D | 6,002,143 | 577,023 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 144 | 0 |
| B | 0 | 144 | 0 |
| C | 0 | 144 | 0 |
| D | 0 | 144 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 41239 | 0 |
| B | 0 | 16760 | 0 |
| C | 0 | 18176 | 0 |
| D | 0 | 22967 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7236 | 3052 | 42.177999% |
| B | 7236 | 137 | 1.893311% |
| C | 7236 | 171 | 2.363184% |
| D | 7235 | 398 | 5.501037% |
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 | 7236 | 7236 | 3120 | 3120 | 43.12% | 43.12% |  |
| B | 7236 | 7236 | 105 | 105 | 1.45% | 1.45% |  |
| C | 7236 | 7236 | 175 | 175 | 2.42% | 2.42% |  |
| D | 7235 | 7235 | 442 | 442 | 6.11% | 6.11% |  |
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 | 8 | 176 | 5437492 | 32950.23 | 644 | 627 | 165.0 |
| A | 15 | 32 | 2405269 | 14573.38 | 644 | 627 | 165.0 |
| A | 3 | 14 | 867952 | 5256.44 | 644 | 627 | 165.0 |
| B | 5 | 185 | 270043 | 1700.59 | 747 | 722 | 158.4 |
| B | 0 | 231 | 140643 | 883.51 | 747 | 722 | 158.4 |
| B | 0 | 171 | 63119 | 394.0 | 747 | 722 | 158.4 |
| C | 12 | 254 | 465389 | 2320.65 | 724 | 720 | 200.2 |
| C | 12 | 252 | 297299 | 1481.17 | 724 | 720 | 200.2 |
| C | 5 | 250 | 260891 | 1299.34 | 724 | 720 | 200.2 |
| D | 2 | 249 | 772481 | 3780.88 | 711 | 681 | 204.1 |
| D | 7 | 77 | 726060 | 3553.47 | 711 | 681 | 204.1 |
| D | 11 | 129 | 420183 | 2055.05 | 711 | 681 | 204.1 |
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 |  |