ASTROSAT CZTI

Data Quality Report

Orbit 20171208_A04_145T01_9000001756_level2

Creation date: 2025-11-19T00:01:17.323986
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/AS1A04_145T01_9000001756cztM0_level2.fits modeM0/AS1A04_145T01_9000001756cztM0_level2_quad_clean.evt
Size (bytes)79,280,64067,069,440
Size75.6 MB 64.0 MB
Events in quadrant A472,494380,566
Events in quadrant B449,236366,673
Events in quadrant C472,940361,377
Events in quadrant D388,674304,573

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189760
B0222290
C0182620
D0299340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A88902863.217098%
B88905916.647919%
C88901671.878515%
D88908249.268841%

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 8890 8890 0 0 0.00% 0.00%
B 8889 8887 0 0 0.00% 0.00%
C 8889 8889 0 0 0.00% 0.00%
D 8890 8889 0 0 0.00% 0.00%

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 29 476 10.78 122 115 33.5
A 14 188 462 10.36 122 115 33.5
A 14 204 414 8.93 122 115 33.5
B 2 9 382 10.2 119 113 26.4
B 14 254 334 8.38 119 113 26.4
B 3 17 296 6.94 119 113 26.4
C 3 126 374 7.62 124 115 34.0
C 12 241 372 7.56 124 115 34.0
C 2 191 364 7.33 124 115 34.0
D 3 14 305 6.42 111 101 31.8
D 6 231 296 6.13 111 101 31.8
D 7 5 291 5.98 111 101 31.8

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