ASTROSAT CZTI

Data Quality Report

Orbit 57737

Creation date: 2026-05-31T01:47:26.998699
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_083T16_9000006580_57737cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57737cztM0_level2_quad_clean.evt
Size (bytes)496,834,560100,523,520
Size473.8 MB 95.9 MB
Events in quadrant A3,681,538674,078
Events in quadrant B3,830,966701,358
Events in quadrant C6,261,148576,974
Events in quadrant D4,070,911601,331

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0162063
B0165422
C0235422
D0169702

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70351091.549396%
B70352032.885572%
C703585012.082445%
D70351592.260128%

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 7830 7035 70 70 0.89% 1.00%
B 7830 7035 63 63 0.80% 0.90%
C 7830 7035 768 768 9.81% 10.92%
D 7830 7035 146 146 1.86% 2.08%

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 7 160 371352 1977.25 756 736 187.4
A 0 12 320328 1705.04 756 736 187.4
A 3 128 39474 206.67 756 736 187.4
B 10 16 290459 1835.57 738 711 157.9
B 5 185 187636 1184.18 738 711 157.9
B 4 80 158447 999.27 738 711 157.9
C 15 224 3107235 16608.23 686 676 187.0
C 9 38 246158 1312.39 686 676 187.0
C 12 2 78862 417.99 686 676 187.0
D 2 249 317596 1550.57 721 687 204.4
D 3 224 209599 1022.17 721 687 204.4
D 9 49 199335 971.95 721 687 204.4

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