Observation information
- date-obs: 2026-02-20
- time-obs: 08:38:37.512900000
- date-end: 2026-02-20
- time-end: 10:44:11.496900000
- obs_id: A14_049T01_9000006552
- exposure: 1580.76539385
- 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_56261cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56261cztM0_level2_quad_clean.evt
|
| Size (bytes) | 822,349,440 | 77,771,520 |
| Size | 784.3 MB
| 74.2 MB
|
| Events in quadrant A | 14,868,742 | 165,211 |
| Events in quadrant B | 3,878,175 | 680,579 |
| Events in quadrant C | 6,938,980 | 482,528 |
| Events in quadrant D | 4,251,243 | 573,401 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 132 | 0 |
| B | 0 | 132 | 0 |
| C | 0 | 132 | 0 |
| D | 0 | 132 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 10 | 0 |
| B | 0 | 10 | 0 |
| C | 0 | 10 | 0 |
| D | 0 | 10 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 48609 | 1 |
| B | 0 | 15806 | 1 |
| C | 0 | 25022 | 1 |
| D | 0 | 16924 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6494 | 5034 | 77.517709% |
| B | 6494 | 274 | 4.219279% |
| C | 6495 | 1762 | 27.128560% |
| D | 6495 | 208 | 3.202463% |
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 | 7533 | 6493 | 4776 | 4776 | 63.40% | 73.56% |  |
| B | 7534 | 6495 | 47 | 47 | 0.62% | 0.72% |  |
| C | 7535 | 6496 | 917 | 917 | 12.17% | 14.12% |  |
| D | 7535 | 6496 | 120 | 120 | 1.59% | 1.85% |  |
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 | 115 | 6205901 | 56907.57 | 430 | 419 | 109.0 |
| A | 8 | 176 | 3910084 | 35853.71 | 430 | 419 | 109.0 |
| A | 15 | 32 | 2312152 | 21199.82 | 430 | 419 | 109.0 |
| B | 5 | 185 | 332620 | 2194.11 | 716 | 690 | 151.3 |
| B | 0 | 63 | 186345 | 1227.21 | 716 | 690 | 151.3 |
| B | 4 | 21 | 90067 | 590.8 | 716 | 690 | 151.3 |
| C | 15 | 230 | 3638788 | 21083.45 | 627 | 620 | 172.6 |
| C | 12 | 254 | 364059 | 2106.16 | 627 | 620 | 172.6 |
| C | 9 | 237 | 130288 | 751.44 | 627 | 620 | 172.6 |
| D | 8 | 129 | 643107 | 3247.01 | 704 | 672 | 197.9 |
| D | 2 | 249 | 318901 | 1608.4 | 704 | 672 | 197.9 |
| D | 2 | 31 | 187071 | 942.1 | 704 | 672 | 197.9 |
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 |  |