ASTROSAT CZTI

Data Quality Report

Orbit 55818

Creation date: 2026-01-22T00:17:57.086750
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_55818cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55818cztM0_level2_quad_clean.evt
Size (bytes)1,664,772,480244,362,240
Size1.6 GB 233.0 MB
Events in quadrant A11,373,4091,723,390
Events in quadrant B8,348,2411,846,162
Events in quadrant C8,706,8281,660,698
Events in quadrant D31,765,408893,642

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0465102
B0399912
C0410473
D01073522

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A184935703.082247%
B184933161.708755%
C184922281.232966%
D18493841645.509112%

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 19503 18495 396 396 2.03% 2.14%
B 19503 18495 119 119 0.61% 0.64%
C 19502 18494 162 162 0.83% 0.88%
D 19503 18495 8279 8279 42.45% 44.76%

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 7 64 1048364 2227.02 1877 1833 469.9
A 0 8 1041253 2211.89 1877 1833 469.9
A 8 192 577001 1223.96 1877 1833 469.9
B 5 185 663226 1640.61 1859 1786 403.2
B 0 213 131883 322.69 1859 1786 403.2
B 10 247 69173 167.14 1859 1786 403.2
C 13 3 1068222 2092.25 1834 1815 509.7
C 15 200 111326 214.86 1834 1815 509.7
C 1 16 92999 178.9 1834 1815 509.7
D 2 62 22144944 55714.41 1387 1325 397.4
D 11 129 2881360 7246.31 1387 1325 397.4
D 8 160 771365 1937.46 1387 1325 397.4

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