ASTROSAT CZTI

Data Quality Report

Orbit 53494

Creation date: 2025-08-18T14:00:19.788247
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/AS1A14_002T07_9000006498_53494cztM0_level2.fits modeM0/AS1A14_002T07_9000006498_53494cztM0_level2_quad_clean.evt
Size (bytes)1,718,668,800113,094,720
Size1.6 GB 107.9 MB
Events in quadrant A19,978,559586,570
Events in quadrant B15,262,149679,887
Events in quadrant C21,718,728455,666
Events in quadrant D5,800,348928,749

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02260
B02260
C02260
D02260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0671085
B0531302
C0719652
D0255132

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11165546148.911778%
B11166480042.987641%
C11166646157.863156%
D111661841.647860%

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 12540 11167 5271 5271 42.03% 47.20%
B 12541 11168 4235 4235 33.77% 37.92%
C 12541 11168 6404 6404 51.06% 57.34%
D 12541 11168 111 111 0.89% 0.99%

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 3 63 8586803 36761.3 951 929 233.6
A 3 62 4911544 21025.3 951 929 233.6
A 15 174 2590243 11086.41 951 929 233.6
B 2 249 10272564 47576.01 1004 968 215.9
B 13 245 188611 869.13 1004 968 215.9
B 0 213 167631 771.95 1004 968 215.9
C 1 241 12184832 57804.9 771 765 210.8
C 7 64 3280751 15561.25 771 765 210.8
C 15 224 1568662 7438.58 771 765 210.8
D 2 120 336463 1033.36 1157 1105 324.5
D 2 16 303012 930.29 1157 1105 324.5
D 3 12 143264 438.04 1157 1105 324.5

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