ASTROSAT CZTI

Data Quality Report

Orbit 24879

Creation date: 2024-06-27T19:10:57.129047
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/AS1A07_027T16_9000003642_24879cztM0_level2.evt modeM0/AS1A07_027T16_9000003642_24879cztM0_level2_quad_clean.evt
Size (bytes)618,960,960100,025,280
Size590.3 MB 95.4 MB
Events in quadrant A3,247,471678,458
Events in quadrant B3,300,529688,804
Events in quadrant C5,069,090611,401
Events in quadrant D6,689,715598,304

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137681
B0139181
C0192911
D0244801

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6475350.540541%
B6475530.818533%
C647565210.069498%
D6474107316.573988%

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 7630 6476 0 0 0.00% 0.00%
B 7630 6476 2 2 0.03% 0.03%
C 7630 6476 511 511 6.70% 7.89%
D 7629 6475 985 985 12.91% 15.21%

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 6 16 29322 172.82 833 816 164.9
A 13 254 11225 63.1 833 816 164.9
A 3 137 7323 39.45 833 816 164.9
B 0 190 22267 138.04 829 812 155.4
B 12 111 18801 115.74 829 812 155.4
B 11 111 16886 103.42 829 812 155.4
C 2 16 1457776 8268.5 762 768 176.2
C 7 247 517691 2933.53 762 768 176.2
C 14 238 122056 688.31 762 768 176.2
D 1 52 3186004 17306.54 763 744 184.0
D 8 195 499809 2711.58 763 744 184.0
D 7 238 89728 483.48 763 744 184.0

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