ASTROSAT CZTI

Data Quality Report

Orbit 56501

Creation date: 2026-03-08T23:17:52.964412
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_060T01_9000006556_56501cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56501cztM0_level2_quad_clean.evt
Size (bytes)1,382,448,960257,846,400
Size1.3 GB 245.9 MB
Events in quadrant A14,069,6021,655,692
Events in quadrant B11,403,1161,784,866
Events in quadrant C10,010,8251,628,432
Events in quadrant D14,253,1121,456,745

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0546913
B0467263
C0433183
D0551043

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1858810545.670325%
B185889835.288358%
C185885282.840542%
D1858913807.423745%

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 19763 18590 607 607 3.07% 3.27%
B 19763 18591 479 479 2.42% 2.58%
C 19763 18591 357 357 1.81% 1.92%
D 19764 18591 1128 1128 5.71% 6.07%

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 14 1973605 3942.94 2018 1962 500.0
A 4 159 1944551 3884.83 2018 1962 500.0
A 7 64 1442065 2879.95 2018 1962 500.0
B 4 206 1374802 3171.42 2004 1929 432.9
B 4 171 696997 1605.65 2004 1929 432.9
B 0 213 694608 1600.13 2004 1929 432.9
C 12 252 1133089 2100.71 1967 1952 538.5
C 13 3 654728 1212.31 1967 1952 538.5
C 15 230 176327 323.84 1967 1952 538.5
D 2 249 3398303 6266.8 1927 1842 542.0
D 3 12 1568377 2890.41 1927 1842 542.0
D 5 113 448967 824.99 1927 1842 542.0

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