ASTROSAT CZTI

Data Quality Report

Orbit 51809

Creation date: 2025-04-27T03:41:57.655934
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/AS1A13_090T01_9000006464_51809cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51809cztM0_level2_quad_clean.evt
Size (bytes)2,430,227,520342,720,000
Size2.3 GB 326.8 MB
Events in quadrant A21,013,9012,214,592
Events in quadrant B22,533,0782,388,162
Events in quadrant C16,493,0252,208,376
Events in quadrant D27,977,2661,829,390

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05120
B05120
C05120
D05120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0798293
B0844803
C0668093
D01005704

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2521720117.974779%
B2521822879.068919%
C252189933.937664%
D25217446017.686481%

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 26822 25220 1535 1535 5.72% 6.09%
B 26823 25221 1252 1252 4.67% 4.96%
C 26823 25221 775 775 2.89% 3.07%
D 26822 25220 4056 4056 15.12% 16.08%

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 13 248 3460540 5345.32 2651 2587 646.9
A 12 3 1845666 2849.04 2651 2587 646.9
A 15 174 1564662 2414.66 2651 2587 646.9
B 4 206 2612109 4597.8 2648 2550 567.6
B 10 44 2541811 4473.95 2648 2550 567.6
B 10 128 2370098 4171.4 2648 2550 567.6
C 13 3 1430642 1984.02 2631 2612 719.8
C 10 22 709855 982.6 2631 2612 719.8
C 15 192 494670 683.64 2631 2612 719.8
D 11 129 10672957 15835.38 2441 2353 673.8
D 0 18 1082023 1602.25 2441 2353 673.8
D 3 12 1054218 1560.99 2441 2353 673.8

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