ASTROSAT CZTI

Data Quality Report

Orbit 20200725_A09_126T01_9000003772_level2

Creation date: 2025-12-13T22:36:49.319725
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/AS1A09_126T01_9000003772cztM0_level2.fits modeM0/AS1A09_126T01_9000003772cztM0_level2_quad_clean.evt
Size (bytes)360,339,840340,920,000
Size343.6 MB 325.1 MB
Events in quadrant A2,265,2022,100,287
Events in quadrant B2,143,3122,087,680
Events in quadrant C2,169,8981,972,324
Events in quadrant D1,876,3481,706,286

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0767440
B0762890
C0753690
D01082630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07320
B07320
C07320
D07320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470
B0470
C0470
D0470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A357665631.574121%
B357666971.948778%
C357668432.356987%
D3576625247.056981%

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 40601 35762 0 0 0.00% 0.00%
B 40601 35760 0 0 0.00% 0.00%
C 40601 35760 0 0 0.00% 0.00%
D 40601 35717 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 1878 9.02 590 555 146.7
A 7 110 1813 8.57 590 555 146.7
A 9 19 1749 8.14 590 555 146.7
B 2 9 1702 10.41 566 541 111.5
B 2 8 1458 8.22 566 541 111.5
B 5 225 1404 7.74 566 541 111.5
C 1 80 1663 7.77 572 536 145.0
C 1 81 1645 7.65 572 536 145.0
C 12 241 1528 6.84 572 536 145.0
D 3 14 1420 6.44 535 488 144.6
D 7 3 1340 5.89 535 488 144.6
D 1 31 1306 5.65 535 488 144.6

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