ASTROSAT CZTI

Data Quality Report

Orbit 56335

Creation date: 2026-02-25T17:51:46.608135
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_56335cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56335cztM0_level2_quad_clean.evt
Size (bytes)802,745,28078,071,040
Size765.6 MB 74.5 MB
Events in quadrant A5,937,404575,082
Events in quadrant B3,917,086671,076
Events in quadrant C3,878,791609,287
Events in quadrant D15,454,96337,021

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0222571
B0164281
C0164571
D0506641

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A677184412.464924%
B67713144.637424%
C67722483.662138%
D6772643194.964560%

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 7466 6773 602 602 8.06% 8.89%
B 7466 6772 95 95 1.27% 1.40%
C 7467 6774 108 108 1.45% 1.59%
D 7467 6773 5044 5044 67.55% 74.47%

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 4 95 1579472 9059.44 709 692 174.3
A 0 8 743560 4262.76 709 692 174.3
A 15 33 306431 1754.41 709 692 174.3
B 5 185 411970 2666.05 718 689 154.3
B 1 255 136588 880.94 718 689 154.3
B 5 172 125642 809.99 718 689 154.3
C 5 250 479494 2468.2 708 701 194.0
C 12 252 221625 1138.88 708 701 194.0
C 12 254 115868 593.69 708 701 194.0
D 8 129 13518356 215745.74 215 204 62.7
D 2 249 380764 6073.63 215 204 62.7
D 2 62 303771 4844.84 215 204 62.7

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