ASTROSAT CZTI

Data Quality Report

Orbit 52878

Creation date: 2025-07-16T12:00:43.300519
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_011T08_9000006482_52878cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52878cztM0_level2_quad_clean.evt
Size (bytes)926,072,64083,750,400
Size883.2 MB 79.9 MB
Events in quadrant A11,670,200342,217
Events in quadrant B6,998,293627,750
Events in quadrant C6,730,123569,556
Events in quadrant D8,361,379525,756

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0392181
B0254331
C0248191
D0295067

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6740349551.854599%
B6741106315.769174%
C6741105815.695001%
D6740146621.750742%

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 7279 6739 3164 3164 43.47% 46.95%
B 7281 6742 879 879 12.07% 13.04%
C 7281 6742 921 921 12.65% 13.66%
D 7280 6741 1385 1385 19.02% 20.55%

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 9 191 9245492 70495.95 508 494 131.1
A 0 8 116106 881.58 508 494 131.1
A 15 174 52078 393.34 508 494 131.1
B 8 3 3617868 25617.8 671 650 141.2
B 4 81 206161 1455.47 671 650 141.2
B 5 200 109861 773.45 671 650 141.2
C 2 12 1658631 9078.2 655 647 182.6
C 15 224 1128628 6176.2 655 647 182.6
C 4 5 292911 1600.28 655 647 182.6
D 8 176 3244257 17075.53 647 617 190.0
D 12 17 1313024 6908.92 647 617 190.0
D 15 125 385252 2024.84 647 617 190.0

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