ASTROSAT CZTI

Data Quality Report

Orbit 54926

Creation date: 2025-11-22T22:15:00.598339
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_014T01_9000006528_54926cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54926cztM0_level2_quad_clean.evt
Size (bytes)638,809,92095,993,280
Size609.2 MB 91.5 MB
Events in quadrant A4,324,500646,013
Events in quadrant B3,563,456707,113
Events in quadrant C5,928,781591,890
Events in quadrant D9,268,520457,295

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0177792
B0160622
C0225262
D0325132

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72334035.571685%
B72342753.801493%
C723476310.547415%
D7234198927.495162%

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 7603 7234 145 145 1.91% 2.00%
B 7604 7235 32 32 0.42% 0.44%
C 7604 7235 498 498 6.55% 6.88%
D 7603 7234 1659 1659 21.82% 22.93%

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 3 45 651021 3326.83 792 772 195.5
A 0 8 258173 1316.92 792 772 195.5
A 3 14 166007 845.38 792 772 195.5
B 10 247 290844 1698.93 786 756 170.7
B 5 32 80984 469.86 786 756 170.7
B 7 252 30746 175.64 786 756 170.7
C 6 223 1274281 6094.93 760 755 208.9
C 12 252 949026 4538.3 760 755 208.9
C 4 5 232017 1106.79 760 755 208.9
D 15 94 1905126 9702.75 697 667 196.3
D 11 129 1399292 7125.65 697 667 196.3
D 3 224 768389 3911.36 697 667 196.3

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