ASTROSAT CZTI

Data Quality Report

Orbit 56535

Creation date: 2026-03-11T03:42:33.941923
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/AS1A14_060T01_9000006556_56535cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56535cztM0_level2_quad_clean.evt
Size (bytes)458,331,84096,269,760
Size437.1 MB 91.8 MB
Events in quadrant A4,359,919618,662
Events in quadrant B3,806,801692,499
Events in quadrant C4,026,577600,888
Events in quadrant D4,274,291555,504

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173872
B0156443
C0165242
D0171652

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64153315.159782%
B64141151.792953%
C64142503.897724%
D64142453.819769%

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 7615 6416 289 289 3.80% 4.50%
B 7614 6415 57 57 0.75% 0.89%
C 7614 6415 236 236 3.10% 3.68%
D 7614 6415 222 222 2.92% 3.46%

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 4 249 1233106 7112.28 696 677 173.3
A 4 95 311810 1795.53 696 677 173.3
A 4 3 30672 173.1 696 677 173.3
B 4 171 332681 2201.71 706 682 150.8
B 0 63 192823 1274.22 706 682 150.8
B 10 247 191495 1265.41 706 682 150.8
C 12 252 678908 3635.15 678 672 186.6
C 15 230 345358 1847.42 678 672 186.6
C 6 223 137176 731.62 678 672 186.6
D 2 249 924140 4795.49 667 638 192.6
D 8 240 181279 938.02 667 638 192.6
D 8 129 118552 612.29 667 638 192.6

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