ASTROSAT CZTI

Data Quality Report

Orbit 20190331_A05_205T01_9000002824_level2

Creation date: 2025-11-29T00:29:37.855964
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/AS1A05_205T01_9000002824cztM0_level2.fits modeM0/AS1A05_205T01_9000002824cztM0_level2_quad_clean.evt
Size (bytes)1,034,602,560959,250,240
Size986.7 MB 914.8 MB
Events in quadrant A6,181,5545,398,359
Events in quadrant B5,986,2165,713,298
Events in quadrant C6,372,7305,605,875
Events in quadrant D5,318,5664,869,094

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01510
B01510
C01510
D01510

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022200
B022200
C022200
D022200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02804380
B02901020
C02262330
D03299820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10889983927.706223%
B10889973956.790696%
C10889916591.523430%
D10889997758.976207%

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 124034 108473 0 0 0.00% 0.00%
B 124034 108837 0 0 0.00% 0.00%
C 124034 108899 0 0 0.00% 0.00%
D 124034 108771 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 5094 9.1 1608 1503 394.4
A 7 110 4999 8.86 1608 1503 394.4
A 9 19 4619 7.9 1608 1503 394.4
B 2 9 4810 10.7 1585 1509 308.6
B 2 8 4035 8.19 1585 1509 308.6
B 14 254 4005 8.09 1585 1509 308.6
C 12 241 4511 6.8 1685 1574 431.9
C 2 191 4316 6.35 1685 1574 431.9
C 3 126 4247 6.19 1685 1574 431.9
D 10 190 3999 6.58 1519 1387 396.9
D 3 14 3786 6.04 1519 1387 396.9
D 6 231 3730 5.9 1519 1387 396.9

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