ASTROSAT CZTI

Data Quality Report

Orbit 57335

Creation date: 2026-05-03T23:34:12.048871
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_102T01_9000006572_57335cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57335cztM0_level2_quad_clean.evt
Size (bytes)512,758,08090,800,640
Size489.0 MB 86.6 MB
Events in quadrant A2,768,202634,924
Events in quadrant B2,913,043678,264
Events in quadrant C5,813,418523,624
Events in quadrant D7,005,323481,026

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0127841
B0129871
C0216351
D0250991

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6187310.501051%
B6188380.614092%
C618886013.897867%
D6187109717.730726%

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 7412 6188 2 2 0.03% 0.03%
B 7413 6189 6 6 0.08% 0.10%
C 7413 6188 704 704 9.50% 11.38%
D 7412 6187 1001 1001 13.51% 16.18%

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 12 61568 359.33 691 673 169.5
A 3 137 8274 44.85 691 673 169.5
A 4 3 7931 42.83 691 673 169.5
B 5 185 55549 379.63 680 656 144.6
B 7 252 25227 169.93 680 656 144.6
B 0 197 22383 150.26 680 656 144.6
C 15 224 3092352 18320.3 612 605 168.8
C 14 254 105358 620.72 612 605 168.8
C 6 223 89338 525.79 612 605 168.8
D 8 240 2270382 13075.28 610 581 173.6
D 3 224 2122003 12220.53 610 581 173.6
D 2 249 97416 557.82 610 581 173.6

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