ASTROSAT CZTI

Data Quality Report

Orbit 51997

Creation date: 2025-05-09T18:22:57.706046
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/AS1C09_011T06_9000006468_51997cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51997cztM0_level2_quad_clean.evt
Size (bytes)1,831,340,160211,029,120
Size1.7 GB 201.3 MB
Events in quadrant A12,715,2451,442,764
Events in quadrant B11,073,5051,599,272
Events in quadrant C15,335,7011,326,932
Events in quadrant D27,374,262862,517

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0494714
B0445512
C0572012
D0930212

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03400
B03400
C03400
D03400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A167649725.798139%
B167647264.330709%
C16764185911.089239%
D16765632737.739338%

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 17034 16765 747 747 4.39% 4.46%
B 17034 16765 440 440 2.58% 2.62%
C 17034 16766 1716 1716 10.07% 10.23%
D 17035 16765 6217 6217 36.50% 37.08%

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 7 64 2312530 5537.56 1707 1668 417.3
A 4 95 1869382 4475.64 1707 1668 417.3
A 3 14 235655 560.71 1707 1668 417.3
B 4 206 1453442 4000.61 1711 1651 362.9
B 0 172 345042 946.26 1711 1651 362.9
B 10 128 266729 730.46 1711 1651 362.9
C 15 224 4819002 10690.82 1625 1612 450.6
C 13 3 1204887 2670.33 1625 1612 450.6
C 4 5 739760 1638.11 1625 1612 450.6
D 6 42 7766510 19331.44 1420 1357 401.7
D 12 17 5851995 14565.23 1420 1357 401.7
D 12 16 2172548 5405.2 1420 1357 401.7

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