ASTROSAT CZTI

Data Quality Report

Orbit 51736

Creation date: 2025-04-22T05:23:13.241063
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/AS1A13_090T01_9000006464_51736cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51736cztM0_level2_quad_clean.evt
Size (bytes)1,872,869,760229,979,520
Size1.7 GB 219.3 MB
Events in quadrant A11,094,0191,667,626
Events in quadrant B12,778,2601,721,382
Events in quadrant C14,307,7791,462,660
Events in quadrant D29,755,414869,023

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03640
B03640
C03640
D03640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0453933
B0504823
C0551423
D01007843

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A180227203.995117%
B1802314598.095212%
C18023195410.841702%
D18023839346.568274%

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 19222 18025 473 473 2.46% 2.62%
B 19223 18024 822 822 4.28% 4.56%
C 19223 18025 1763 1763 9.17% 9.78%
D 19223 18023 8050 8050 41.88% 44.67%

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 0 111 1296946 2717.46 1940 1895 476.6
A 3 114 330600 689.74 1940 1895 476.6
A 4 3 274144 571.27 1940 1895 476.6
B 4 206 2096232 5162.01 1898 1832 405.7
B 4 174 512148 1257.76 1898 1832 405.7
B 8 128 375984 922.16 1898 1832 405.7
C 10 22 2603022 5152.56 1821 1805 504.8
C 13 3 1092338 2160.16 1821 1805 504.8
C 1 243 997555 1972.41 1821 1805 504.8
D 11 129 15934902 38972.7 1433 1382 408.8
D 2 249 3033875 7417.35 1433 1382 408.8
D 8 176 2247186 5493.14 1433 1382 408.8

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