ASTROSAT CZTI

Data Quality Report

Orbit 55974

Creation date: 2026-02-06T05:21:59.971579
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_066T02_9000006546_55974cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55974cztM0_level2_quad_clean.evt
Size (bytes)566,706,240106,211,520
Size540.5 MB 101.3 MB
Events in quadrant A8,312,774660,401
Events in quadrant B3,664,658745,219
Events in quadrant C4,666,757652,752
Events in quadrant D3,744,743628,996

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300250
B0161650
C0192661
D0168690

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75975046.634198%
B7598280.368518%
C75972102.764249%
D7597841.105700%

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 7597 7597 645 645 8.49% 8.49%
B 7598 7598 2 2 0.03% 0.03%
C 7597 7597 191 191 2.51% 2.51%
D 7597 7597 68 68 0.90% 0.90%

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 12 115 4897481 25095.18 785 763 195.1
A 0 8 106928 544.08 785 763 195.1
A 7 64 48810 246.24 785 763 195.1
B 7 0 256961 1474.59 796 765 173.7
B 0 199 93081 531.34 796 765 173.7
B 2 249 90229 514.93 796 765 173.7
C 13 3 749988 3527.58 774 766 212.4
C 9 38 408425 1919.39 774 766 212.4
C 15 230 113199 529.37 774 766 212.4
D 11 129 176754 808.85 772 740 217.6
D 7 96 120483 550.27 772 740 217.6
D 2 249 115731 528.43 772 740 217.6

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