ASTROSAT CZTI

Data Quality Report

Orbit 52950

Creation date: 2025-07-17T10:32:58.906716
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_003T01_9000006486_52950cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52950cztM0_level2_quad_clean.evt
Size (bytes)1,100,373,12077,944,320
Size1.0 GB 74.3 MB
Events in quadrant A17,201,530123,954
Events in quadrant B3,493,300708,831
Events in quadrant C13,457,892479,577
Events in quadrant D6,054,653568,510

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0555280
B0151590
C0446270
D0225900

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67926792100.000000%
B67922533.724971%
C6793421262.005005%
D67936689.833652%

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 7526 6791 6713 6713 89.20% 98.85%
B 7527 6794 67 67 0.89% 0.99%
C 7528 6793 3634 3634 48.27% 53.50%
D 7528 6794 452 452 6.00% 6.65%

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 9 191 16390159 404011.76 155 150 40.6
A 4 238 35381 868.44 155 150 40.6
A 3 78 32203 790.1 155 150 40.6
B 10 63 303086 1921.88 735 708 157.3
B 4 81 39815 248.56 735 708 157.3
B 7 252 38289 238.86 735 708 157.3
C 10 171 8297764 54001.72 561 557 153.6
C 12 254 963438 6266.84 561 557 153.6
C 2 239 720928 4688.48 561 557 153.6
D 8 176 1498531 7448.74 704 673 201.1
D 15 78 406250 2016.91 704 673 201.1
D 11 176 319190 1583.96 704 673 201.1

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