ASTROSAT CZTI

Data Quality Report

Orbit 55026

Creation date: 2025-12-01T11:59:40.044214
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_025T01_9000006530_55026cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55026cztM0_level2_quad_clean.evt
Size (bytes)2,791,477,440254,577,600
Size2.6 GB 242.8 MB
Events in quadrant A27,066,7451,585,220
Events in quadrant B13,128,5262,226,583
Events in quadrant C12,149,9492,047,964
Events in quadrant D49,234,064287,049

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01036057248
B0594903445
C0563573335
D017864117159

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A049129
B049026
C049129
D049329

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0480
B0480
C0480
D0480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22671583125.720083%
B2290513125.728007%
C229374521.970615%
D221591907886.095943%

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 43500 23197 5291 5291 12.16% 22.81%
B 43500 23363 1056 1056 2.43% 4.52%
C 43500 23408 304 304 0.70% 1.30%
D 43500 22526 15836 15836 36.40% 70.30%

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 13329293 25793.43 2087 2037 516.7
A 12 115 2819501 5452.89 2087 2037 516.7
A 0 250 1741895 3367.3 2087 2037 516.7
B 0 183 2490718 4965.71 2343 2258 501.1
B 10 245 398226 790.15 2343 2258 501.1
B 5 185 285331 564.87 2343 2258 501.1
C 4 5 1219631 1862.62 2385 2361 653.5
C 1 16 552865 842.36 2385 2361 653.5
C 6 223 380497 578.61 2385 2361 653.5
D 15 94 38203136 157740.18 842 801 242.2
D 11 129 5995191 24751.27 842 801 242.2
D 10 181 654742 2700.17 842 801 242.2

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