ASTROSAT CZTI

Data Quality Report

Orbit 20201127_A10_016T01_9000004034_level2

Creation date: 2025-12-17T22:41:54.175917
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/AS1A10_016T01_9000004034cztM0_level2.fits modeM0/AS1A10_016T01_9000004034cztM0_level2_quad_clean.evt
Size (bytes)930,968,640654,845,760
Size887.8 MB 624.5 MB
Events in quadrant A5,944,7763,655,858
Events in quadrant B5,605,0563,641,090
Events in quadrant C5,751,2803,437,077
Events in quadrant D4,702,7862,909,971

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01909410
B02045060
C02037930
D03418730

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018380
B018360
C018380
D018400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01570
B01570
C01570
D01570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9023312041.334323%
B9021717401.928683%
C9019825572.834874%
D902291411215.640204%

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 101875 88634 0 0 0.00% 0.00%
B 101875 88632 0 0 0.00% 0.00%
C 101875 88627 0 0 0.00% 0.00%
D 101875 88468 0 0 0.00% 0.00%

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 0 29 4842 9.05 1548 1455 374.1
A 7 110 4561 8.3 1548 1455 374.1
A 9 19 4366 7.78 1548 1455 374.1
B 2 9 4435 10.31 1487 1420 292.4
B 2 8 3728 7.89 1487 1420 292.4
B 5 225 3625 7.54 1487 1420 292.4
C 1 80 4321 7.59 1519 1426 381.4
C 1 81 4284 7.49 1519 1426 381.4
C 12 241 3902 6.49 1519 1426 381.4
D 3 14 3344 5.97 1344 1229 354.2
D 7 3 3316 5.89 1344 1229 354.2
D 10 189 3292 5.82 1344 1229 354.2

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