ASTROSAT CZTI

Data Quality Report

Orbit 51700

Creation date: 2025-04-22T12:01:15.128337
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_031T01_9000006462_51700cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51700cztM0_level2_quad_clean.evt
Size (bytes)605,165,76092,790,720
Size577.1 MB 88.5 MB
Events in quadrant A5,773,933621,602
Events in quadrant B3,802,258689,254
Events in quadrant C8,374,289461,108
Events in quadrant D3,925,495566,096

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218591
B0159831
C0296576
D0163691

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67703675.420975%
B67702113.116691%
C6769205130.299897%
D67702994.416544%

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 7695 6771 156 156 2.03% 2.30%
B 7695 6771 35 35 0.45% 0.52%
C 7694 6770 1477 1477 19.20% 21.82%
D 7695 6771 183 183 2.38% 2.70%

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 888126 4938.94 734 718 179.7
A 12 3 817746 4547.24 734 718 179.7
A 3 14 368261 2045.59 734 718 179.7
B 0 213 261628 1658.72 734 709 157.3
B 8 128 251749 1595.92 734 709 157.3
B 1 223 78421 494.03 734 709 157.3
C 15 231 2027895 12116.25 614 610 167.3
C 0 192 1784822 10663.5 614 610 167.3
C 15 189 1580223 9440.7 614 610 167.3
D 3 12 508152 2584.49 714 691 196.3
D 8 176 151994 770.58 714 691 196.3
D 2 249 79227 399.98 714 691 196.3

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