ASTROSAT CZTI

Data Quality Report

Orbit 56899

Creation date: 2026-04-04T19:29:47.376651
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_083T14_9000006564_56899cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56899cztM0_level2_quad_clean.evt
Size (bytes)448,355,52083,413,440
Size427.6 MB 79.5 MB
Events in quadrant A3,039,583566,686
Events in quadrant B6,214,088487,458
Events in quadrant C3,012,133552,802
Events in quadrant D3,876,767510,784

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133661
B0224571
C0129711
D0154491

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A58322213.789438%
B5833145324.909995%
C58331131.937254%
D58331953.343048%

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 6957 5833 116 116 1.67% 1.99%
B 6958 5834 910 910 13.08% 15.60%
C 6958 5834 47 47 0.68% 0.81%
D 6958 5834 141 141 2.03% 2.42%

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 8 206 219633 1418.26 625 609 154.4
A 4 13 182066 1175.0 625 609 154.4
A 3 62 180405 1164.24 625 609 154.4
B 5 185 3374295 28638.39 550 530 117.8
B 10 16 275128 2330.94 550 530 117.8
B 1 127 169015 1430.19 550 530 117.8
C 1 16 200654 1202.68 609 603 166.3
C 13 3 151557 907.52 609 603 166.3
C 14 254 141310 845.91 609 603 166.3
D 2 31 395652 2320.82 605 578 170.2
D 8 160 236924 1388.39 605 578 170.2
D 2 249 201845 1182.32 605 578 170.2

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