ASTROSAT CZTI

Data Quality Report

Orbit 56239

Creation date: 2026-02-19T12:03:33.205335
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_083T04_9000006550_56239cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56239cztM0_level2_quad_clean.evt
Size (bytes)1,764,325,440172,964,160
Size1.6 GB 165.0 MB
Events in quadrant A26,714,432747,746
Events in quadrant B9,780,7691,280,790
Events in quadrant C9,373,3591,146,946
Events in quadrant D18,134,820891,985

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03400
B03400
C03400
D03400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0913261
B0412022
C0405511
D0657831

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16936633337.393718%
B169354772.816652%
C169365623.318375%
D16936300217.725555%

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 17620 17155 5745 5745 32.60% 33.49%
B 17619 17220 232 232 1.32% 1.35%
C 17620 17218 403 403 2.29% 2.34%
D 17620 17149 2831 2831 16.07% 16.51%

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 15 32 11041962 30256.95 1463 1432 364.9
A 8 176 7320662 20058.6 1463 1432 364.9
A 12 115 1378650 3774.31 1463 1432 364.9
B 4 171 862315 2314.31 1747 1681 371.9
B 5 185 468709 1255.87 1747 1681 371.9
B 10 247 278399 744.12 1747 1681 371.9
C 12 252 745526 1612.45 1688 1675 461.3
C 5 250 716759 1550.09 1688 1675 461.3
C 15 148 246904 531.58 1688 1675 461.3
D 8 129 7824022 17579.58 1552 1481 445.0
D 2 249 1406707 3157.96 1552 1481 445.0
D 15 115 845002 1895.64 1552 1481 445.0

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