ASTROSAT CZTI

Data Quality Report

Orbit 20200123_A07_138T09_9000003458_level2

Creation date: 2025-12-08T22:57:14.127889
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/AS1A07_138T09_9000003458cztM0_level2.fits modeM0/AS1A07_138T09_9000003458cztM0_level2_quad_clean.evt
Size (bytes)333,195,840358,050,240
Size317.8 MB 341.5 MB
Events in quadrant A2,037,1902,198,651
Events in quadrant B1,953,0802,206,848
Events in quadrant C1,955,9922,084,205
Events in quadrant D1,737,6791,947,343

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07100
B07120
C07080
D07120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0717020
B0741430
C0888300
D0827330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A350411850.527953%
B350493110.887329%
C3505511343.234917%
D350566601.882702%

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 37072 33642 0 0 0.00% 0.00%
B 37071 33647 0 0 0.00% 0.00%
C 37071 33650 0 0 0.00% 0.00%
D 37071 33646 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 1954 10.95 530 497 133.0
A 7 110 1666 8.79 530 497 133.0
A 0 30 1519 7.68 530 497 133.0
B 2 9 1553 10.28 515 491 103.3
B 2 8 1338 8.2 515 491 103.3
B 3 17 1320 8.02 515 491 103.3
C 3 126 1378 6.77 517 483 132.1
C 12 241 1358 6.62 517 483 132.1
C 9 209 1288 6.09 517 483 132.1
D 3 14 1222 5.72 496 452 134.7
D 15 46 1217 5.68 496 452 134.7
D 10 189 1216 5.67 496 452 134.7

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