ASTROSAT CZTI

Data Quality Report

Orbit 56262

Creation date: 2026-02-22T22:33:55.255666
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_56262cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56262cztM0_level2_quad_clean.evt
Size (bytes)837,506,88080,087,040
Size798.7 MB 76.4 MB
Events in quadrant A16,944,18074,239
Events in quadrant B4,262,527691,646
Events in quadrant C4,893,744603,274
Events in quadrant D4,372,774581,030

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0548408
B0172591
C0193341
D0176901

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6811618690.823668%
B68112503.670533%
C68125407.927187%
D68122673.919554%

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 7675 6810 5661 5661 73.76% 83.13%
B 7676 6812 62 62 0.81% 0.91%
C 7677 6813 383 383 4.99% 5.62%
D 7677 6813 194 194 2.53% 2.85%

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 8291235 90384.94 364 354 91.7
A 8 176 3291310 35877.11 364 354 91.7
A 15 32 2867287 31254.53 364 354 91.7
B 5 185 339592 2191.95 737 710 154.6
B 0 63 250307 1614.44 737 710 154.6
B 0 231 181661 1170.42 737 710 154.6
C 13 3 1016181 5224.97 710 704 194.4
C 12 254 745943 3834.51 710 704 194.4
C 12 252 113543 580.59 710 704 194.4
D 8 129 462378 2276.49 721 688 202.8
D 2 249 395538 1946.92 721 688 202.8
D 11 176 255268 1255.28 721 688 202.8

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