ASTROSAT CZTI

Data Quality Report

Orbit 50175

Creation date: 2025-01-07T10:53:18.802866
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1C09_003T01_9000006442_50175cztM0_level2.fits modeM0/AS1C09_003T01_9000006442_50175cztM0_level2_quad_clean.evt
Size (bytes)1,105,899,84059,760,000
Size1.0 GB 57.0 MB
Events in quadrant A6,923,587522,847
Events in quadrant B4,038,846650,764
Events in quadrant C15,285,8124,408
Events in quadrant D14,194,548184,686

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0251481
B0165161
C0497821
D0465621

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6398109317.083464%
B63993245.063291%
C6399637099.546804%
D6399466072.823879%

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 7458 6399 991 991 13.29% 15.49%
B 7459 6400 225 225 3.02% 3.52%
C 7459 6400 5399 5399 72.38% 84.36%
D 7459 6400 4722 4722 63.31% 73.78%

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 0 98 1844985 11741.22 618 602 157.1
A 6 250 680462 4327.94 618 602 157.1
A 10 253 488553 3106.26 618 602 157.1
B 5 172 861704 6183.88 662 642 139.2
B 4 216 137903 985.77 662 642 139.2
B 0 213 87884 626.54 662 642 139.2
C 15 213 8759966 151890.59 197 195 57.7
C 4 111 3462197 60029.59 197 195 57.7
C 15 214 543632 9422.95 197 195 57.7
D 15 185 2500259 18636.21 474 459 134.1
D 12 6 1836790 13690.0 474 459 134.1
D 15 168 1796900 13392.61 474 459 134.1

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