ASTROSAT CZTI

Data Quality Report

Orbit 57870

Creation date: 2026-06-08T23:32:08.825799
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_125T11_9000006582_57870cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57870cztM0_level2_quad_clean.evt
Size (bytes)521,835,84091,797,120
Size497.7 MB 87.5 MB
Events in quadrant A2,741,295629,634
Events in quadrant B4,647,692621,262
Events in quadrant C7,302,092512,350
Events in quadrant D4,122,108563,910

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0131111
B0183661
C0262171
D0166331

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6484100.154226%
B64835187.990128%
C6484109816.933991%
D6484270.416410%

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 7473 6484 0 0 0.00% 0.00%
B 7472 6483 419 419 5.61% 6.46%
C 7474 6485 1120 1120 14.99% 17.27%
D 7474 6485 16 16 0.21% 0.25%

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 3 245 14982 82.89 698 682 172.5
A 7 64 9935 53.64 698 682 172.5
A 4 3 9595 51.67 698 682 172.5
B 5 172 1578289 11008.8 665 640 143.3
B 4 158 185681 1291.21 665 640 143.3
B 5 185 50852 350.38 665 640 143.3
C 15 224 1936079 11298.77 623 618 171.3
C 2 12 1545115 9016.41 623 618 171.3
C 9 38 1081435 6309.56 623 618 171.3
D 12 110 1121052 5903.54 667 638 189.8
D 2 153 110605 579.42 667 638 189.8
D 2 31 101891 533.51 667 638 189.8

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