ASTROSAT CZTI

Data Quality Report

Orbit 51688

Creation date: 2025-04-22T12:01:11.204446
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_031T01_9000006462_51688cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51688cztM0_level2_quad_clean.evt
Size (bytes)661,855,680112,383,360
Size631.2 MB 107.2 MB
Events in quadrant A4,867,200751,508
Events in quadrant B4,447,525809,741
Events in quadrant C9,566,053574,582
Events in quadrant D4,970,031686,092

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201621
B0189821
C0342521
D0205241

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A83554495.374028%
B83564625.528961%
C8356225827.022499%
D83563684.404021%

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 8470 8356 77 77 0.91% 0.92%
B 8471 8357 40 40 0.47% 0.48%
C 8471 8357 1639 1639 19.35% 19.61%
D 8471 8357 63 63 0.74% 0.75%

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 458756 2037.56 934 909 224.7
A 12 250 257985 1144.07 934 909 224.7
A 5 240 127853 564.94 934 909 224.7
B 0 171 207170 1044.46 922 888 197.5
B 8 128 142538 717.21 922 888 197.5
B 5 185 87994 441.04 922 888 197.5
C 15 189 4278843 19588.0 817 811 218.4
C 0 192 756064 3458.11 817 811 218.4
C 13 3 507958 2322.09 817 811 218.4
D 10 172 381397 1514.21 914 882 251.3
D 3 12 327147 1298.33 914 882 251.3
D 2 249 146282 578.6 914 882 251.3

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