ASTROSAT CZTI

Data Quality Report

Orbit 58899

Creation date: 2026-08-17T06:28:55.464496
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_004T07_9000006598_58899cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58899cztM0_level2_quad_clean.evt
Size (bytes)1,935,480,960238,472,640
Size1.8 GB 227.4 MB
Events in quadrant A14,615,0071,607,735
Events in quadrant B9,648,1151,844,469
Events in quadrant C12,595,7501,618,811
Events in quadrant D33,356,833872,811

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0563623
B0419143
C0504313
D01118394

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1851916338.817971%
B185204612.489201%
C1852010405.615551%
D18519890348.074950%

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 19979 18522 1197 1197 5.99% 6.46%
B 19980 18523 236 236 1.18% 1.27%
C 19980 18523 888 888 4.44% 4.79%
D 19979 18522 7908 7908 39.58% 42.70%

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 14 238 3370725 6953.38 1949 1900 484.5
A 15 233 1885703 3888.24 1949 1900 484.5
A 0 24 1655566 3413.23 1949 1900 484.5
B 4 171 832568 1975.1 1981 1908 420.6
B 4 236 320386 757.26 1981 1908 420.6
B 10 247 148785 349.24 1981 1908 420.6
C 12 252 2061598 3905.37 1931 1911 527.4
C 4 5 1230553 2329.63 1931 1911 527.4
C 14 254 599065 1132.26 1931 1911 527.4
D 12 110 23295241 51197.55 1587 1516 455.0
D 11 129 2341385 5142.83 1587 1516 455.0
D 4 230 418147 915.72 1587 1516 455.0

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

TCT plots

Parameter TCT0 TCT_healed
Tct