ASTROSAT CZTI

Data Quality Report

Orbit 52491

Creation date: 2025-06-25T19:36:02.342019
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/AS1A13_037T01_9000006476_52491cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52491cztM0_level2_quad_clean.evt
Size (bytes)2,843,156,160188,239,680
Size2.6 GB 179.5 MB
Events in quadrant A13,762,0781,578,979
Events in quadrant B13,935,5941,751,886
Events in quadrant C27,800,7501,059,703
Events in quadrant D48,292,5426,817

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0566162727
B055057785
C0982822659
D01598743296

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03906
B03884
C03873
D03875

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1885717599.328101%
B1890014707.777778%
C18858691036.642274%
D188541880399.729500%

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 20439 18866 1132 1132 5.54% 6.00%
B 20440 18927 795 795 3.89% 4.20%
C 20440 18877 5486 5486 26.84% 29.06%
D 20439 18855 18143 18143 88.77% 96.22%

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 8 26 3306575 6826.26 1986 1935 484.1
A 3 45 1322855 2728.57 1986 1935 484.1
A 13 248 176034 359.63 1986 1935 484.1
B 10 44 2639315 6175.05 1993 1920 427.1
B 10 254 1977413 4625.31 1993 1920 427.1
B 4 81 376389 876.76 1993 1920 427.1
C 15 224 14341753 31967.67 1653 1635 448.6
C 2 12 3328626 7416.69 1653 1635 448.6
C 15 231 985386 2193.02 1653 1635 448.6
D 15 93 37299425 229188.97 563 536 162.7
D 6 42 7406579 45507.61 563 536 162.7
D 2 153 713136 4378.68 563 536 162.7

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