ASTROSAT CZTI

Data Quality Report

Orbit 51961

Creation date: 2025-05-07T07:25:57.405563
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/AS1C09_011T06_9000006468_51961cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51961cztM0_level2_quad_clean.evt
Size (bytes)907,113,60079,672,320
Size865.1 MB 76.0 MB
Events in quadrant A6,820,601542,834
Events in quadrant B4,670,577660,912
Events in quadrant C9,906,655413,529
Events in quadrant D11,673,144336,037

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0248423
B0185003
C0340263
D0391273

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6574101515.439611%
B65752974.517110%
C6575247837.688213%
D6575303946.220532%

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 7628 6575 774 774 10.15% 11.77%
B 7630 6576 183 183 2.40% 2.78%
C 7630 6577 1876 1876 24.59% 28.52%
D 7630 6577 2844 2844 37.27% 43.24%

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 4 159 1920538 11894.28 638 622 161.4
A 7 64 795439 4924.06 638 622 161.4
A 4 249 333120 2059.89 638 622 161.4
B 10 44 409451 2882.67 671 649 141.8
B 10 41 327537 2305.06 671 649 141.8
B 5 185 320872 2258.06 671 649 141.8
C 15 224 5791057 37190.68 552 544 155.7
C 15 192 443082 2842.29 552 544 155.7
C 12 252 296434 1900.41 552 544 155.7
D 6 42 7159326 47572.73 517 491 150.5
D 12 16 753236 5002.23 517 491 150.5
D 0 5 433053 2874.51 517 491 150.5

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