ASTROSAT CZTI

Data Quality Report

Orbit 55025

Creation date: 2025-11-29T14:15:03.285172
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_025T01_9000006530_55025cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55025cztM0_level2_quad_clean.evt
Size (bytes)893,727,36069,958,080
Size852.3 MB 66.7 MB
Events in quadrant A11,578,329301,528
Events in quadrant B3,193,132702,783
Events in quadrant C3,091,465621,267
Events in quadrant D14,711,18235,950

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0388811
B0142011
C0140441
D0482016

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6550377557.633588%
B65501131.725191%
C6551751.144863%
D6550623495.175573%

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 7680 6551 3200 3200 41.67% 48.85%
B 7680 6551 19 19 0.25% 0.29%
C 7681 6552 22 22 0.29% 0.34%
D 7680 6551 4780 4780 62.24% 72.97%

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 15 32 9501715 77028.06 500 488 123.3
A 4 78 79658 641.84 500 488 123.3
A 3 45 17260 135.97 500 488 123.3
B 5 236 149010 964.81 713 686 153.7
B 10 245 110790 716.2 713 686 153.7
B 5 185 43018 275.36 713 686 153.7
C 6 223 126636 645.71 704 695 195.0
C 1 16 59002 298.95 704 695 195.0
C 14 254 32969 165.47 704 695 195.0
D 15 94 11409506 166891.95 234 223 68.4
D 15 93 1044282 15272.22 234 223 68.4
D 15 110 830842 12150.07 234 223 68.4

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