Observation information
- date-obs: 2026-02-23
- time-obs: 00:51:37.999600000
- date-end: 2026-02-23
- time-end: 02:56:42.981100000
- obs_id: A14_049T01_9000006552
- exposure: 2954.72302771
- 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_56301cztM0_level2.fits
| modeM0/AS1A14_049T01_9000006552_56301cztM0_level2_quad_clean.evt
|
| Size (bytes) | 740,157,120 | 80,366,400 |
| Size | 705.9 MB
| 76.6 MB
|
| Events in quadrant A | 12,639,390 | 281,663 |
| Events in quadrant B | 5,321,022 | 599,713 |
| Events in quadrant C | 5,111,227 | 549,969 |
| Events in quadrant D | 3,823,810 | 549,813 |
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 | 42068 | 9 |
| B | 0 | 20342 | 1 |
| C | 0 | 19832 | 1 |
| D | 0 | 15996 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6479 | 3790 | 58.496682% |
| B | 6479 | 894 | 13.798426% |
| C | 6480 | 689 | 10.632716% |
| D | 6480 | 145 | 2.237654% |
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 | 7504 | 6480 | 3728 | 3728 | 49.68% | 57.53% |  |
| B | 7503 | 6479 | 673 | 673 | 8.97% | 10.39% |  |
| C | 7505 | 6481 | 548 | 548 | 7.30% | 8.46% |  |
| D | 7505 | 6481 | 123 | 123 | 1.64% | 1.90% |  |
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 | 7555827 | 62675.16 | 481 | 470 | 120.5 |
| A | 7 | 64 | 2225154 | 18454.78 | 481 | 470 | 120.5 |
| A | 4 | 249 | 357679 | 2963.21 | 481 | 470 | 120.5 |
| B | 5 | 172 | 1945993 | 13753.19 | 654 | 629 | 141.4 |
| B | 5 | 185 | 404915 | 2858.19 | 654 | 629 | 141.4 |
| B | 0 | 231 | 82296 | 577.36 | 654 | 629 | 141.4 |
| C | 5 | 250 | 1654475 | 9290.17 | 645 | 640 | 178.0 |
| C | 12 | 252 | 390847 | 2191.93 | 645 | 640 | 178.0 |
| C | 5 | 233 | 274312 | 1537.31 | 645 | 640 | 178.0 |
| D | 2 | 249 | 496083 | 2631.34 | 663 | 631 | 188.3 |
| D | 2 | 31 | 347370 | 1841.53 | 663 | 631 | 188.3 |
| D | 2 | 120 | 68051 | 358.07 | 663 | 631 | 188.3 |
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 |  |