ASTROSAT CZTI

Data Quality Report

Orbit 55879

Creation date: 2026-01-26T00:32:49.708250
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_030T02_9000006544_55879cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55879cztM0_level2_quad_clean.evt
Size (bytes)558,204,48087,255,360
Size532.3 MB 83.2 MB
Events in quadrant A4,152,353582,840
Events in quadrant B2,927,462647,361
Events in quadrant C4,192,146552,063
Events in quadrant D8,888,684408,681

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0168621
B0136851
C0173361
D0308641

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64653455.336427%
B6466741.144448%
C64663505.412929%
D6466192029.693783%

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 7440 6466 279 279 3.75% 4.31%
B 7441 6467 15 15 0.20% 0.23%
C 7441 6467 265 265 3.56% 4.10%
D 7441 6467 1563 1563 21.01% 24.17%

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 737650 4531.64 651 635 162.6
A 0 8 360001 2209.61 651 635 162.6
A 4 249 193276 1184.48 651 635 162.6
B 5 185 120844 852.88 657 632 140.9
B 0 153 69020 485.2 657 632 140.9
B 0 197 44908 314.13 657 632 140.9
C 12 254 1006851 5747.56 635 629 175.1
C 13 3 508096 2898.66 635 629 175.1
C 12 252 104977 596.04 635 629 175.1
D 11 129 6156970 38359.83 564 539 160.5
D 3 12 101774 630.78 564 539 160.5
D 15 125 76255 471.78 564 539 160.5

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