ASTROSAT CZTI

Data Quality Report

Orbit 55813

Creation date: 2026-01-21T22:03:40.107829
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_55813cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55813cztM0_level2_quad_clean.evt
Size (bytes)585,763,200101,445,120
Size558.6 MB 96.7 MB
Events in quadrant A5,433,506656,785
Events in quadrant B3,171,413720,987
Events in quadrant C6,326,837593,428
Events in quadrant D6,180,301587,523

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0211830
B0153270
C0242750
D0235300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73642122.878870%
B7365460.624576%
C736580610.943652%
D73654436.014936%

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 7364 7364 257 257 3.49% 3.49%
B 7365 7365 13 13 0.18% 0.18%
C 7365 7365 747 747 10.14% 10.14%
D 7365 7365 392 392 5.32% 5.32%

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 12 115 1228723 6768.46 731 712 181.4
A 15 32 600881 3307.97 731 712 181.4
A 7 64 413038 2272.63 731 712 181.4
B 5 185 120755 752.12 730 704 159.6
B 0 213 53048 327.93 730 704 159.6
B 10 247 45747 282.19 730 704 159.6
C 13 3 3468250 18076.97 687 679 191.8
C 15 200 52402 269.64 687 679 191.8
C 7 220 34422 175.9 687 679 191.8
D 11 129 1698400 8526.08 699 670 199.1
D 8 160 617113 3095.81 699 670 199.1
D 8 245 570869 2863.57 699 670 199.1

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