ASTROSAT CZTI

Data Quality Report

Orbit 56257

Creation date: 2026-02-23T07:38:01.073381
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_049T01_9000006552_56257cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56257cztM0_level2_quad_clean.evt
Size (bytes)614,900,16092,476,800
Size586.4 MB 88.2 MB
Events in quadrant A11,025,664476,641
Events in quadrant B3,572,662681,829
Events in quadrant C3,778,357606,256
Events in quadrant D3,862,969566,055

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0374356
B0152862
C0161972
D0163002

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6732200829.827689%
B67321362.020202%
C67321852.748069%
D67321241.841949%

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 7732 6733 1798 1798 23.25% 26.70%
B 7732 6733 46 46 0.59% 0.68%
C 7732 6733 112 112 1.45% 1.66%
D 7732 6733 93 93 1.20% 1.38%

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 8 176 4135090 25571.82 649 631 161.7
A 4 95 1638164 10128.22 649 631 161.7
A 12 115 782478 4835.76 649 631 161.7
B 5 185 299392 1942.02 719 694 153.8
B 10 247 74836 482.04 719 694 153.8
B 0 231 73950 476.28 719 694 153.8
C 12 254 349980 1817.1 705 699 192.2
C 13 3 272398 1413.49 705 699 192.2
C 12 252 238242 1235.79 705 699 192.2
D 8 129 450003 2305.03 696 664 194.9
D 2 249 260705 1333.97 696 664 194.9
D 11 129 149432 763.15 696 664 194.9

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