ASTROSAT CZTI

Data Quality Report

Orbit 55799

Creation date: 2026-01-20T17:34:33.814810
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_127T10_9000006542_55799cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55799cztM0_level2_quad_clean.evt
Size (bytes)1,702,863,360234,244,800
Size1.6 GB 223.4 MB
Events in quadrant A31,423,6351,009,304
Events in quadrant B8,739,8431,749,077
Events in quadrant C11,380,8181,546,698
Events in quadrant D10,053,2351,507,268

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01062321
B0408711
C0493543
D0444201

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03720
B03720
C03720
D03720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18576770941.499785%
B185777514.042633%
C1857612966.976744%
D185766363.423773%

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 19360 18573 6583 6583 34.00% 35.44%
B 19362 18578 210 210 1.08% 1.13%
C 19361 18577 864 864 4.46% 4.65%
D 19361 18577 313 313 1.62% 1.68%

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 21933483 57480.52 1512 1474 381.6
A 7 64 1531545 4010.09 1512 1474 381.6
A 8 192 626595 1638.35 1512 1474 381.6
B 4 206 973042 2494.01 1816 1744 389.5
B 5 172 187002 475.69 1816 1744 389.5
B 0 153 140818 357.1 1816 1744 389.5
C 13 3 4060436 8429.02 1761 1749 481.5
C 12 252 157220 322.88 1761 1749 481.5
C 6 223 73745 149.52 1761 1749 481.5
D 11 129 1659560 3244.64 1802 1725 510.9
D 8 245 331418 645.26 1802 1725 510.9
D 3 12 196229 380.67 1802 1725 510.9

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