ASTROSAT CZTI

Data Quality Report

Orbit 20151210_P01_997T02_9000000212_level2

Creation date: 2025-10-25T10:34:17.576398
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/AS1P01_997T02_9000000212cztM0_level2.fits modeM0/AS1P01_997T02_9000000212cztM0_level2_quad_clean.evt
Size (bytes)991,889,2801,595,093,760
Size945.9 MB 1.5 GB
Events in quadrant A5,714,06010,465,494
Events in quadrant B5,632,89610,520,259
Events in quadrant C5,530,8549,858,037
Events in quadrant D4,775,3609,088,679

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01590
B01590
C01590
D01590

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05193900
B05342620
C05226060
D05088020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024940
B024940
C024940
D024940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1223489570.782195%
B1223504450.363711%
C1223504820.393952%
D12234824371.991859%

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 152296 122338 0 0 0.00% 0.00%
B 152296 122340 0 0 0.00% 0.00%
C 152296 122343 0 0 0.00% 0.00%
D 152296 121952 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 5402 11.73 1478 1378 343.1
A 7 110 5240 11.26 1478 1378 343.1
A 14 188 4213 8.26 1478 1378 343.1
B 2 9 4576 11.9 1488 1414 265.6
B 14 254 3843 9.14 1488 1414 265.6
B 2 8 3614 8.28 1488 1414 265.6
C 12 241 3785 6.86 1461 1350 355.1
C 2 191 3660 6.5 1461 1350 355.1
C 9 242 3567 6.24 1461 1350 355.1
D 6 44 3516 7.05 1363 1246 321.8
D 11 82 3483 6.95 1363 1246 321.8
D 3 30 3358 6.56 1363 1246 321.8

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