ASTROSAT CZTI

Data Quality Report

Orbit 58487

Creation date: 2026-07-20T20:02:12.855640
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_044T04_9000006592_58487cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58487cztM0_level2_quad_clean.evt
Size (bytes)607,026,240114,071,040
Size578.9 MB 108.8 MB
Events in quadrant A4,975,132738,753
Events in quadrant B8,342,407732,968
Events in quadrant C4,074,586735,661
Events in quadrant D4,443,258678,343

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0203811
B0306191
C0180261
D0192231

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A81755626.874618%
B8176132516.205969%
C81763354.097358%
D81764365.332681%

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 9025 8176 90 90 1.00% 1.10%
B 9026 8177 486 486 5.38% 5.94%
C 9026 8177 12 12 0.13% 0.15%
D 9026 8177 87 87 0.96% 1.06%

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 10 17 597204 2471.03 972 945 241.3
A 3 14 145323 598.33 972 945 241.3
A 10 143 126294 519.47 972 945 241.3
B 5 172 4385091 21339.31 925 885 205.5
B 2 249 122153 590.25 925 885 205.5
B 0 186 34595 164.08 925 885 205.5
C 6 13 135366 513.06 956 947 262.0
C 12 252 88374 333.7 956 947 262.0
C 6 223 69225 260.61 956 947 262.0
D 3 12 273740 1032.81 946 906 264.2
D 2 31 177741 669.4 946 906 264.2
D 2 153 101304 380.05 946 906 264.2

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